# git rev-parse -q --verify 4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0^{commit}
4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0
already have revision, skipping fetch
# git checkout -q -f -B kisskb 4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0
# git clean -qxdf
# < git log -1
# commit 4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0
# Author: Jiangfeng Xiao <xiaojiangfeng@huawei.com>
# Date:   Tue Jan 23 09:45:59 2024 +0800
# 
#     powerpc/kasan: Fix addr error caused by page alignment
#     
#     In kasan_init_region, when k_start is not page aligned, at the begin of
#     for loop, k_cur = k_start & PAGE_MASK is less than k_start, and then
#     `va = block + k_cur - k_start` is less than block, the addr va is invalid,
#     because the memory address space from va to block is not alloced by
#     memblock_alloc, which will not be reserved by memblock_reserve later, it
#     will be used by other places.
#     
#     As a result, memory overwriting occurs.
#     
#     for example:
#     int __init __weak kasan_init_region(void *start, size_t size)
#     {
#     [...]
#             /* if say block(dcd97000) k_start(feef7400) k_end(feeff3fe) */
#             block = memblock_alloc(k_end - k_start, PAGE_SIZE);
#             [...]
#             for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
#                     /* at the begin of for loop
#                      * block(dcd97000) va(dcd96c00) k_cur(feef7000) k_start(feef7400)
#                      * va(dcd96c00) is less than block(dcd97000), va is invalid
#                      */
#                     void *va = block + k_cur - k_start;
#                     [...]
#             }
#     [...]
#     }
#     
#     Therefore, page alignment is performed on k_start before
#     memblock_alloc() to ensure the validity of the VA address.
#     
#     Fixes: 663c0c9496a6 ("powerpc/kasan: Fix shadow area set up for modules.")
#     Signed-off-by: Jiangfeng Xiao <xiaojiangfeng@huawei.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://msgid.link/1705974359-43790-1-git-send-email-xiaojiangfeng@huawei.com
# < /opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_defconfig_sparc64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-  defconfig
# < make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_defconfig_sparc64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_defconfig_sparc64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_defconfig_sparc64-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/arch/sparc/prom/p1275.c:52:6: warning: no previous prototype for 'prom_cif_init' [-Wmissing-prototypes]
   52 | void prom_cif_init(void *cif_handler, void *cif_stack)
      |      ^~~~~~~~~~~~~
/kisskb/src/arch/sparc/prom/misc_64.c:165:5: warning: no previous prototype for 'prom_get_mmu_ihandle' [-Wmissing-prototypes]
  165 | int prom_get_mmu_ihandle(void)
      |     ^~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/traps_64.c:253:6: warning: no previous prototype for 'is_no_fault_exception' [-Wmissing-prototypes]
  253 | bool is_no_fault_exception(struct pt_regs *regs)
      |      ^~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vma.c:246:12: warning: no previous prototype for 'init_vdso_image' [-Wmissing-prototypes]
  246 | int __init init_vdso_image(const struct vdso_image *image,
      |            ^~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/traps_64.c:2035:6: warning: no previous prototype for 'do_mcd_err' [-Wmissing-prototypes]
 2035 | void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
      |      ^~~~~~~~~~
/kisskb/src/arch/sparc/kernel/traps_64.c:2153:6: warning: no previous prototype for 'sun4v_nonresum_error_user_handled' [-Wmissing-prototypes]
 2153 | bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/setup_64.c:602:13: warning: no previous prototype for 'alloc_irqstack_bootmem' [-Wmissing-prototypes]
  602 | void __init alloc_irqstack_bootmem(void)
      |             ^~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/mm/init_64.c:2644:6: warning: no previous prototype for 'vmemmap_free' [-Wmissing-prototypes]
 2644 | void vmemmap_free(unsigned long start, unsigned long end,
      |      ^~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
  254 | __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
      | ^~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
  282 | __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
  307 | __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
      | ^~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
  343 | __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/arch/sparc/vdso/vdso32/vclock_gettime.c:22:
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:254:1: warning: no previous prototype for '__vdso_clock_gettime' [-Wmissing-prototypes]
  254 | __vdso_clock_gettime(clockid_t clock, struct __kernel_old_timespec *ts)
      | ^~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:282:1: warning: no previous prototype for '__vdso_clock_gettime_stick' [-Wmissing-prototypes]
  282 | __vdso_clock_gettime_stick(clockid_t clock, struct __kernel_old_timespec *ts)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:307:1: warning: no previous prototype for '__vdso_gettimeofday' [-Wmissing-prototypes]
  307 | __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
      | ^~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/vdso/vdso32/../vclock_gettime.c:343:1: warning: no previous prototype for '__vdso_gettimeofday_stick' [-Wmissing-prototypes]
  343 | __vdso_gettimeofday_stick(struct __kernel_old_timeval *tv, struct timezone *tz)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/time_64.c:880:20: warning: no previous prototype for 'sched_clock' [-Wmissing-prototypes]
  880 | unsigned long long sched_clock(void)
      |                    ^~~~~~~~~~~
/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-ld: warning: arch/sparc/vdso/vdso-note.o: missing .note.GNU-stack section implies executable stack
/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-ld: warning: arch/sparc/vdso/vdso32/vdso-note.o: missing .note.GNU-stack section implies executable stack
/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/sparc64-linux/bin/sparc64-linux-ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
/kisskb/src/arch/sparc/kernel/adi_64.c:124:21: warning: no previous prototype for 'find_tag_store' [-Wmissing-prototypes]
  124 | tag_storage_desc_t *find_tag_store(struct mm_struct *mm,
      |                     ^~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/adi_64.c:156:21: warning: no previous prototype for 'alloc_tag_store' [-Wmissing-prototypes]
  156 | tag_storage_desc_t *alloc_tag_store(struct mm_struct *mm,
      |                     ^~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/adi_64.c:299:6: warning: no previous prototype for 'del_tag_store' [-Wmissing-prototypes]
  299 | void del_tag_store(tag_storage_desc_t *tag_desc, struct mm_struct *mm)
      |      ^~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/pci_sun4v.c:259:15: warning: no previous prototype for 'dma_4v_iotsb_bind' [-Wmissing-prototypes]
  259 | unsigned long dma_4v_iotsb_bind(unsigned long devhandle,
      |               ^~~~~~~~~~~~~~~~~
/kisskb/src/arch/sparc/kernel/uprobes.c:237:17: warning: no previous prototype for 'uprobe_trap' [-Wmissing-prototypes]
  237 | asmlinkage void uprobe_trap(struct pt_regs *regs,
      |                 ^~~~~~~~~~~
WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
Is "_mcount" prototyped in <asm/asm-prototypes.h>?
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_defconfig_sparc64-gcc12
# Build took: 0:03:09.532002