# git rev-parse -q --verify 8c1684bb81f173543599f1848c29a2a3b1ee5907^{commit}
8c1684bb81f173543599f1848c29a2a3b1ee5907
already have revision, skipping fetch
# git checkout -q -f -B kisskb 8c1684bb81f173543599f1848c29a2a3b1ee5907
# git clean -qxdf
# < git log -1
# commit 8c1684bb81f173543599f1848c29a2a3b1ee5907
# Merge: f44d5c489051 3f2c788a1314
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu May 14 11:52:28 2020 -0700
# 
#     Merge tag 'for-linus-2020-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
#     
#     Pull thread fix from Christian Brauner:
#      "This contains a single fix for all exported legacy fork helpers to
#       block accidental access to clone3() features in the upper 32 bits of
#       their respective flags arguments.
#     
#       I got Cced on a glibc issue where someone reported consistent failures
#       for the legacy clone() syscall on ppc64le when sign extension was
#       performed (since the clone() syscall in glibc exposes the flags
#       argument as an int whereas the kernel uses unsigned long).
#     
#       The legacy clone() syscall is odd in a bunch of ways and here two
#       things interact:
#     
#        - First, legacy clone's flag argument is word-size dependent, i.e.
#          it's an unsigned long whereas most system calls with flag arguments
#          use int or unsigned int.
#     
#        - Second, legacy clone() ignores unknown and deprecated flags.
#     
#       The two of them taken together means that users on 64bit systems can
#       pass garbage for the upper 32bit of the clone() syscall since forever
#       and things would just work fine.
#     
#       The following program compiled on a 64bit kernel prior to v5.7-rc1
#       will succeed and will fail post v5.7-rc1 with EBADF:
#     
#         int main(int argc, char *argv[])
#         {
#               pid_t pid;
#     
#               /* Note that legacy clone() has different argument ordering on
#                * different architectures so this won't work everywhere.
#                *
#                * Only set the upper 32 bits.
#                */
#               pid = syscall(__NR_clone, 0xffffffff00000000 | SIGCHLD,
#                             NULL, NULL, NULL, NULL);
#               if (pid < 0)
#                       exit(EXIT_FAILURE);
#               if (pid == 0)
#                       exit(EXIT_SUCCESS);
#               if (wait(NULL) != pid)
#                       exit(EXIT_FAILURE);
#     
#               exit(EXIT_SUCCESS);
#         }
#     
#       Since legacy clone() couldn't be extended this was not a problem so
#       far and nobody really noticed or cared since nothing in the kernel
#       ever bothered to look at the upper 32 bits.
#     
#       But once we introduced clone3() and expanded the flag argument in
#       struct clone_args to 64 bit we opened this can of worms. With the
#       first flag-based extension to clone3() making use of the upper 32 bits
#       of the flag argument we've effectively made it possible for the legacy
#       clone() syscall to reach clone3() only flags on accident. The sign
#       extension scenario is just the odd corner-case that we needed to
#       figure this out.
#     
#       The reason we just realized this now and not already when we
#       introduced CLONE_CLEAR_SIGHAND was that CLONE_INTO_CGROUP assumes that
#       a valid cgroup file descriptor has been given - whereas
#       CLONE_CLEAR_SIGHAND doesn't need to verify anything. It just silently
#       resets the signal handlers to SIG_DFL.
#     
#       So the sign extension (or the user accidently passing garbage for the
#       upper 32 bits) caused the CLONE_INTO_CGROUP bit to be raised and the
#       kernel to error out when it didn't find a valid cgroup file
#       descriptor.
#     
#       Note, I'm also capping kernel_thread()'s flag argument mainly because
#       none of the new features make sense for kernel_thread() and we
#       shouldn't risk them being accidently activated however unlikely. If we
#       wanted to, we could even make kernel_thread() yell when an unknown
#       flag has been set which it doesn't do right now. But it's not worth
#       risking this in a bugfix imho"
#     
#     * tag 'for-linus-2020-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
#       fork: prevent accidental access to clone3 features
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 8c1684bb81f173543599f1848c29a2a3b1ee5907
# < make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  allyesconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  help
# make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  olddefconfig
# make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-allyesconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  
/kisskb/src/arch/s390/kernel/perf_cpum_sf.c: In function 'perf_push_sample':
/kisskb/src/arch/s390/kernel/perf_cpum_sf.c:1136:1: warning: 'perf_push_sample' uses dynamic stack allocation
 }
 ^
/kisskb/src/arch/s390/kernel/perf_cpum_cf_diag.c: In function 'cf_diag_push_sample':
/kisskb/src/arch/s390/kernel/perf_cpum_cf_diag.c:519:1: warning: 'cf_diag_push_sample' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_sync_single_for_cpu':
/kisskb/src/kernel/dma/debug.c:1554:1: warning: 'debug_dma_sync_single_for_cpu' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_sync_single_for_device':
/kisskb/src/kernel/dma/debug.c:1574:1: warning: 'debug_dma_sync_single_for_device' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_sync_sg_for_cpu':
/kisskb/src/kernel/dma/debug.c:1607:1: warning: 'debug_dma_sync_sg_for_cpu' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_sync_sg_for_device':
/kisskb/src/kernel/dma/debug.c:1639:1: warning: 'debug_dma_sync_sg_for_device' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_unmap_page':
/kisskb/src/kernel/dma/debug.c:1341:1: warning: 'debug_dma_unmap_page' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_unmap_resource':
/kisskb/src/kernel/dma/debug.c:1535:1: warning: 'debug_dma_unmap_resource' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_unmap_sg':
/kisskb/src/kernel/dma/debug.c:1431:1: warning: 'debug_dma_unmap_sg' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/dma/debug.c: In function 'debug_dma_free_coherent':
/kisskb/src/kernel/dma/debug.c:1493:1: warning: 'debug_dma_free_coherent' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/bpf/syscall.c: In function 'bpf_prog_show_fdinfo':
/kisskb/src/kernel/bpf/syscall.c:1787:1: warning: 'bpf_prog_show_fdinfo' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/bpf/syscall.c: In function 'bpf_prog_get_info_by_fd.isra.23':
/kisskb/src/kernel/bpf/syscall.c:3256:1: warning: 'bpf_prog_get_info_by_fd.isra.23' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_log_throttle':
/kisskb/src/kernel/events/core.c:8426:1: warning: 'perf_log_throttle' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_bpf_output':
/kisskb/src/kernel/events/core.c:8560:1: warning: 'perf_event_bpf_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_log_itrace_start':
/kisskb/src/kernel/events/core.c:8667:1: warning: 'perf_log_itrace_start' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_switch_output':
/kisskb/src/kernel/events/core.c:8355:1: warning: 'perf_event_switch_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_task_output':
/kisskb/src/kernel/events/core.c:7515:1: warning: 'perf_event_task_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_namespaces_output':
/kisskb/src/kernel/events/core.c:7708:1: warning: 'perf_event_namespaces_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_ksymbol_output':
/kisskb/src/kernel/events/core.c:8471:1: warning: 'perf_event_ksymbol_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_cgroup_output':
/kisskb/src/kernel/events/core.c:7831:1: warning: 'perf_event_cgroup_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_comm_output':
/kisskb/src/kernel/events/core.c:7609:1: warning: 'perf_event_comm_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_swevent_hrtimer':
/kisskb/src/kernel/events/core.c:10135:1: warning: 'perf_swevent_hrtimer' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_mmap_output':
/kisskb/src/kernel/events/core.c:7972:1: warning: 'perf_event_mmap_output' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_read_event':
/kisskb/src/kernel/events/core.c:7228:1: warning: 'perf_event_read_event' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/ring_buffer.c: In function 'perf_output_begin_forward':
/kisskb/src/kernel/events/ring_buffer.c:269:1: warning: 'perf_output_begin_forward' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/ring_buffer.c: In function 'perf_output_begin_backward':
/kisskb/src/kernel/events/ring_buffer.c:275:1: warning: 'perf_output_begin_backward' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/ring_buffer.c: In function 'perf_output_begin':
/kisskb/src/kernel/events/ring_buffer.c:283:1: warning: 'perf_output_begin' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_event_aux_event':
/kisskb/src/kernel/events/core.c:8263:1: warning: 'perf_event_aux_event' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_log_lost_samples':
/kisskb/src/kernel/events/core.c:8296:1: warning: 'perf_log_lost_samples' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function 'perf_tp_event':
/kisskb/src/kernel/events/core.c:9306:1: warning: 'perf_tp_event' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/events/core.c: In function '___perf_sw_event':
/kisskb/src/kernel/events/core.c:8992:1: warning: '___perf_sw_event' uses dynamic stack allocation
 }
 ^
/kisskb/src/mm/slub.c: In function 'unfreeze_partials.isra.40':
/kisskb/src/mm/slub.c:2271:1: warning: 'unfreeze_partials.isra.40' uses dynamic stack allocation
 }
 ^
/kisskb/src/mm/slub.c: In function 'get_partial_node.isra.41':
/kisskb/src/mm/slub.c:1910:1: warning: 'get_partial_node.isra.41' uses dynamic stack allocation
 }
 ^
/kisskb/src/mm/slub.c: In function 'deactivate_slab.isra.42':
/kisskb/src/mm/slub.c:2203:1: warning: 'deactivate_slab.isra.42' uses dynamic stack allocation
 }
 ^
/kisskb/src/mm/slub.c: In function '__slab_free':
/kisskb/src/mm/slub.c:2978:1: warning: '__slab_free' uses dynamic stack allocation
 }
 ^
/kisskb/src/mm/slub.c: In function '___slab_alloc':
/kisskb/src/mm/slub.c:2665:1: warning: '___slab_alloc' uses dynamic stack allocation
 }
 ^
/kisskb/src/lib/crypto/chacha20poly1305.c: In function 'chacha20poly1305_crypt_sg_inplace':
/kisskb/src/lib/crypto/chacha20poly1305.c:335:1: warning: 'chacha20poly1305_crypt_sg_inplace' uses dynamic stack allocation
 }
 ^
/kisskb/src/fs/nfs/super.c: In function 'nfs_show_stats':
/kisskb/src/fs/nfs/super.c:687:1: warning: 'nfs_show_stats' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/smp.c: In function 'smp_call_function_single':
/kisskb/src/kernel/smp.c:316:1: warning: 'smp_call_function_single' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_signal_ieq':
/kisskb/src/drivers/s390/net/ism_drv.c:357:1: warning: 'ism_signal_ieq' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_del_vlan_id':
/kisskb/src/drivers/s390/net/ism_drv.c:329:1: warning: 'ism_del_vlan_id' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_add_vlan_id':
/kisskb/src/drivers/s390/net/ism_drv.c:315:1: warning: 'ism_add_vlan_id' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_query_rgid':
/kisskb/src/drivers/s390/net/ism_drv.c:214:1: warning: 'ism_query_rgid' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_unregister_dmb':
/kisskb/src/drivers/s390/net/ism_drv.c:301:1: warning: 'ism_unregister_dmb' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_register_dmb':
/kisskb/src/drivers/s390/net/ism_drv.c:280:1: warning: 'ism_register_dmb' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'query_info':
/kisskb/src/drivers/s390/net/ism_drv.c:83:1: warning: 'query_info' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/s390/net/ism_drv.c: In function 'ism_probe':
/kisskb/src/drivers/s390/net/ism_drv.c:544:1: warning: 'ism_probe' uses dynamic stack allocation
 }
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_static_all':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_static_all' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:268:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(static_all);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_static_all':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_static_all' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:268:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(static_all);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_dynamic_all':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_dynamic_all' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:271:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(dynamic_all);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_dynamic_all':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_dynamic_all' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:271:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(dynamic_all);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_zero.isra.9':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_zero.isra.9' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:265:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(zero);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_zero':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_zero' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:265:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(zero);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_static_partial.isra.17':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_static_partial.isra.17' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:267:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(static_partial);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_static_partial':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_static_partial' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:267:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(static_partial);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_dynamic_partial.isra.29':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_dynamic_partial.isra.29' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:270:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(dynamic_partial);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_dynamic_partial':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_dynamic_partial' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:270:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(dynamic_partial);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_runtime_partial.isra.41':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_runtime_partial.isra.41' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:273:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(runtime_partial);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_runtime_partial':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_runtime_partial' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:273:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(runtime_partial);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_runtime_all.isra.49':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_runtime_all.isra.49' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:274:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(runtime_all);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_runtime_all':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_runtime_all' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:274:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(runtime_all);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'leaf_big_hole_none.isra.63':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'leaf_big_hole_none.isra.63' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:168:2: note: in definition of macro 'DEFINE_TEST'
  var_type var INIT_ ## which ## _ ## init_level;  \
  ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:277:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(none);
 ^
/kisskb/src/lib/test_stackinit.c: In function 'test_big_hole_none':
/kisskb/src/lib/test_stackinit.c:255:15: warning: 'test_big_hole_none' uses dynamic stack allocation
        struct test_ ## name, STRUCT, init)
               ^
/kisskb/src/lib/test_stackinit.c:101:2: note: in definition of macro 'DEFINE_TEST_DRIVER'
  var_type zero INIT_CLONE_ ## which;   \
  ^
/kisskb/src/lib/test_stackinit.c:254:3: note: in expansion of macro 'DEFINE_TEST'
   DEFINE_TEST(name ## _ ## init,   \
   ^
/kisskb/src/lib/test_stackinit.c:259:3: note: in expansion of macro 'DEFINE_STRUCT_TEST'
   DEFINE_STRUCT_TEST(big_hole, init);  \
   ^
/kisskb/src/lib/test_stackinit.c:277:1: note: in expansion of macro 'DEFINE_STRUCT_TESTS'
 DEFINE_STRUCT_TESTS(none);
 ^
/kisskb/src/kernel/rseq.c: In function '__rseq_handle_notify_resume':
/kisskb/src/kernel/rseq.c:281:1: warning: '__rseq_handle_notify_resume' uses dynamic stack allocation
 }
 ^
/kisskb/src/kernel/rseq.c: In function 'rseq_syscall':
/kisskb/src/kernel/rseq.c:300:1: warning: 'rseq_syscall' uses dynamic stack allocation
 }
 ^
/kisskb/src/lib/test_kasan.c: In function 'kasan_alloca_oob_left':
/kisskb/src/lib/test_kasan.c:547:1: warning: 'kasan_alloca_oob_left' uses dynamic stack allocation
 }
 ^
/kisskb/src/lib/test_kasan.c: In function 'kasan_alloca_oob_right':
/kisskb/src/lib/test_kasan.c:557:1: warning: 'kasan_alloca_oob_right' uses dynamic stack allocation
 }
 ^
/kisskb/src/net/bridge/br_device.c: In function 'br_get_stats64':
/kisskb/src/net/bridge/br_device.c:220:1: warning: 'br_get_stats64' uses dynamic stack allocation
 }
 ^
/kisskb/src/net/bridge/netfilter/ebtables.c: In function 'compat_copy_everything_to_user':
/kisskb/src/net/bridge/netfilter/ebtables.c:1854:1: warning: 'compat_copy_everything_to_user' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/target/iscsi/cxgbit/cxgbit_target.c: In function 'cxgbit_tx_datain_iso.isra.34':
/kisskb/src/drivers/target/iscsi/cxgbit/cxgbit_target.c:498:1: warning: 'cxgbit_tx_datain_iso.isra.34' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/target/iscsi/iscsi_target.c: In function 'iscsit_send_datain':
/kisskb/src/drivers/target/iscsi/iscsi_target.c:2871:1: warning: 'iscsit_send_datain' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_mst_dsc_aux_for_port':
/kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5502:9: warning: missing braces around initializer [-Wmissing-braces]
  struct drm_dp_desc desc = { 0 };
         ^
/kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5502:9: warning: (near initialization for 'desc.ident') [-Wmissing-braces]
/kisskb/src/drivers/input/joystick/analog.c:160:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp]
 #warning Precise timer not defined for this architecture.
  ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function 'amdgpu_dm_psr_enable':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8676:9: warning: missing braces around initializer [-Wmissing-braces]
  struct dc_static_screen_params params = {0};
         ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8676:9: warning: (near initialization for 'params.triggers') [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c: In function 'encoder_control_dmcub':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:116:9: warning: missing braces around initializer [-Wmissing-braces]
  struct dmub_rb_cmd_digx_encoder_control encoder_control = { 0 };
         ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:116:9: warning: (near initialization for 'encoder_control.header') [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c: In function 'set_pixel_clock_dmcub':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:342:9: warning: missing braces around initializer [-Wmissing-braces]
  struct dmub_rb_cmd_set_pixel_clock pixel_clock = { 0 };
         ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table2.c:342:9: warning: (near initialization for 'pixel_clock.header') [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c: In function 'bios_parser_get_i2c_info':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c:297:9: warning: missing braces around initializer [-Wmissing-braces]
  struct atom_i2c_record dummy_record = {0};
         ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/bios/bios_parser2.c:297:9: warning: (near initialization for 'dummy_record.record_header') [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c: In function 'dp_test_get_audio_test_data':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:2695:8: warning: missing braces around initializer [-Wmissing-braces]
  union audio_test_mode            dpcd_test_mode = {0};
        ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:2695:8: warning: (near initialization for 'dpcd_test_mode.bits') [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:2697:8: warning: missing braces around initializer [-Wmissing-braces]
  union audio_test_pattern_period  dpcd_pattern_period[AUDIO_CHANNELS_COUNT] = {0};
        ^
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:2697:8: warning: (near initialization for 'dpcd_pattern_period[0]') [-Wmissing-braces]
/kisskb/src/drivers/crypto/chelsio/chtls/chtls_cm.c: In function 'wait_for_states.constprop':
/kisskb/src/drivers/crypto/chelsio/chtls/chtls_cm.c:403:1: warning: 'wait_for_states.constprop' uses dynamic stack allocation
 }
 ^
/kisskb/src/drivers/android/binderfs.c: In function 'binderfs_fill_super':
/kisskb/src/drivers/android/binderfs.c:653:9: warning: missing braces around initializer [-Wmissing-braces]
  struct binderfs_device device_info = { 0 };
         ^
/kisskb/src/drivers/android/binderfs.c:653:9: warning: (near initialization for 'device_info.name') [-Wmissing-braces]
In file included from /kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:40:0:
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c: In function 'mvpp2_setup_bm_pool':
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2.h:634:2: warning: overflow in implicit constant conversion [-Woverflow]
  ((total_size) - NET_SKB_PAD - MVPP2_SKB_SHINFO_SIZE)
  ^
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2.h:699:33: note: in expansion of macro 'MVPP2_RX_MAX_PKT_SIZE'
 #define MVPP2_BM_SHORT_PKT_SIZE MVPP2_RX_MAX_PKT_SIZE(MVPP2_BM_SHORT_FRAME_SIZE)
                                 ^
/kisskb/src/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:580:41: note: in expansion of macro 'MVPP2_BM_SHORT_PKT_SIZE'
  mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE;
                                         ^
/kisskb/src/drivers/net/ethernet/neterion/vxge/vxge-config.c: In function 'vxge_hw_device_hw_info_get':
/kisskb/src/drivers/net/ethernet/neterion/vxge/vxge-config.c:1089:1: warning: 'vxge_hw_device_hw_info_get' uses dynamic stack allocation
 }
 ^
/kisskb/src/arch/s390/boot/mem_detect.c: In function 'detect_memory':
/kisskb/src/arch/s390/boot/mem_detect.c:175:1: warning: 'detect_memory' uses dynamic stack allocation
 }
 ^
Completed OK
# rm -rf /kisskb/build/linus_s390-allyesconfig_s390x-gcc4.9
# Build took: 0:17:22.133913