Buildresult: linus/mpc85xx_defconfig/powerpc-gcc4.9 built on May 13 2021, 04:37

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Status:	OK
Date/Time:	May 13 2021, 04:37
Duration:	0:01:22.459973
Builder:	ka4
Revision:	ptrace: make ptrace() fail if the tracee changed its pid unexpectedly (`dbb5afad100a828c97e012c6106566d99f041db6)`
Target:	linus/mpc85xx_defconfig/powerpc-gcc4.9
Branch:	linus
Compiler:	powerpc-gcc4.9 (powerpc64-linux-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	mpc85xx_defconfig (download)
Log:	Download original Possible warnings (5) net/sched/sch_frag.c:93:10: warning: missing braces around initializer [-Wmissing-braces] net/sched/sch_frag.c:93:10: warning: (near initialization for 'sch_frag_rt.dst') [-Wmissing-braces] include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) Full Log # git rev-parse -q --verify dbb5afad100a828c97e012c6106566d99f041db6^{commit} dbb5afad100a828c97e012c6106566d99f041db6 already have revision, skipping fetch # git checkout -q -f -B kisskb dbb5afad100a828c97e012c6106566d99f041db6 # git clean -qxdf # < git log -1 # commit dbb5afad100a828c97e012c6106566d99f041db6 # Author: Oleg Nesterov <oleg@redhat.com> # Date: Wed May 12 15:33:08 2021 +0200 # # ptrace: make ptrace() fail if the tracee changed its pid unexpectedly # # Suppose we have 2 threads, the group-leader L and a sub-theread T, # both parked in ptrace_stop(). Debugger tries to resume both threads # and does # # ptrace(PTRACE_CONT, T); # ptrace(PTRACE_CONT, L); # # If the sub-thread T execs in between, the 2nd PTRACE_CONT doesn not # resume the old leader L, it resumes the post-exec thread T which was # actually now stopped in PTHREAD_EVENT_EXEC. In this case the # PTHREAD_EVENT_EXEC event is lost, and the tracer can't know that the # tracee changed its pid. # # This patch makes ptrace() fail in this case until debugger does wait() # and consumes PTHREAD_EVENT_EXEC which reports old_pid. This affects all # ptrace requests except the "asynchronous" PTRACE_INTERRUPT/KILL. # # The patch doesn't add the new PTRACE_ option to not complicate the API, # and I _hope_ this won't cause any noticeable regression: # # - If debugger uses PTRACE_O_TRACEEXEC and the thread did an exec # and the tracer does a ptrace request without having consumed # the exec event, it's 100% sure that the thread the ptracer # thinks it is targeting does not exist anymore, or isn't the # same as the one it thinks it is targeting. # # - To some degree this patch adds nothing new. In the scenario # above ptrace(L) can fail with -ESRCH if it is called after the # execing sub-thread wakes the leader up and before it "steals" # the leader's pid. # # Test-case: # # #include <stdio.h> # #include <unistd.h> # #include <signal.h> # #include <sys/ptrace.h> # #include <sys/wait.h> # #include <errno.h> # #include <pthread.h> # #include <assert.h> # # void tf(void arg) # { # execve("/usr/bin/true", NULL, NULL); # assert(0); # # return NULL; # } # # int main(void) # { # int leader = fork(); # if (!leader) { # kill(getpid(), SIGSTOP); # # pthread_t th; # pthread_create(&th, NULL, tf, NULL); # for (;;) # pause(); # # return 0; # } # # waitpid(leader, NULL, WSTOPPED); # # ptrace(PTRACE_SEIZE, leader, 0, # PTRACE_O_TRACECLONE \| PTRACE_O_TRACEEXEC); # waitpid(leader, NULL, 0); # # ptrace(PTRACE_CONT, leader, 0,0); # waitpid(leader, NULL, 0); # # int status, thread = waitpid(-1, &status, 0); # assert(thread > 0 && thread != leader); # assert(status == 0x80137f); # # ptrace(PTRACE_CONT, thread, 0,0); # /* # * waitid() because waitpid(leader, &status, WNOWAIT) does not # * report status. Why ???? # * # * Why WEXITED? because we have another kernel problem connected # * to mt-exec. # / # siginfo_t info; # assert(waitid(P_PID, leader, &info, WSTOPPED\|WEXITED\|WNOWAIT) == 0); # assert(info.si_pid == leader && info.si_status == 0x0405); # # / OK, it sleeps in ptrace(PTRACE_EVENT_EXEC == 0x04) / # assert(ptrace(PTRACE_CONT, leader, 0,0) == -1); # assert(errno == ESRCH); # # assert(leader == waitpid(leader, &status, WNOHANG)); # assert(status == 0x04057f); # # assert(ptrace(PTRACE_CONT, leader, 0,0) == 0); # # return 0; # } # # Signed-off-by: Oleg Nesterov <oleg@redhat.com> # Reported-by: Simon Marchi <simon.marchi@efficios.com> # Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> # Acked-by: Pedro Alves <palves@redhat.com> # Acked-by: Simon Marchi <simon.marchi@efficios.com> # Acked-by: Jan Kratochvil <jan.kratochvil@redhat.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 dbb5afad100a828c97e012c6106566d99f041db6 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/net/sched/sch_frag.c: In function 'sch_fragment': /kisskb/src/net/sched/sch_frag.c:93:10: warning: missing braces around initializer [-Wmissing-braces] struct rtable sch_frag_rt = { 0 }; ^ /kisskb/src/net/sched/sch_frag.c:93:10: warning: (near initialization for 'sch_frag_rt.dst') [-Wmissing-braces] In file included from /kisskb/src/include/linux/kernel.h:11:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void )(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd76ef0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) INFO: Uncompressed kernel (size 0xd667c4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xe00000) Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6546386 Bytes = 6392.96 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6545566 Bytes = 6392.15 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6546198 Bytes = 6392.77 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544798 Bytes = 6391.40 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6514688 Bytes = 6362.00 KiB = 6.21 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544668 Bytes = 6391.28 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6546432 Bytes = 6393.00 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544688 Bytes = 6391.30 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544638 Bytes = 6391.25 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544690 Bytes = 6391.30 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544796 Bytes = 6391.40 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e00314 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544637 Bytes = 6391.25 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544840 Bytes = 6391.45 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544785 Bytes = 6391.39 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6545409 Bytes = 6392.00 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e002a4 Image Name: Linux-5.13.0-rc1-gdbb5afad100a Created: Thu May 13 04:38:32 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6544663 Bytes = 6391.27 KiB = 6.24 MiB Load Address: 00e00000 Entry Point: 00e00314 Completed OK # rm -rf /kisskb/build/linus_mpc85xx_defconfig_powerpc-gcc4.9 # Build took: 0:01:22.459973

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