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================================================================== BUG: KCSAN: data-race in __percpu_counter_limited_add / __percpu_counter_limited_add write to 0xffff8881085e5910 of 8 bytes by task 3713 on cpu 1: __percpu_counter_limited_add+0x3df/0x450 lib/percpu_counter.c:386 percpu_counter_limited_add include/linux/percpu_counter.h:77 [inline] shmem_inode_acct_blocks+0xf5/0x230 mm/shmem.c:228 shmem_alloc_and_add_folio mm/shmem.c:1814 [inline] shmem_get_folio_gfp+0x5e2/0xd80 mm/shmem.c:2188 shmem_get_folio mm/shmem.c:2293 [inline] shmem_write_begin+0xa0/0x1c0 mm/shmem.c:2898 generic_perform_write+0x1b4/0x580 mm/filemap.c:4019 shmem_file_write_iter+0xc8/0xf0 mm/shmem.c:3074 __kernel_write_iter+0x24f/0x4e0 fs/read_write.c:523 dump_emit_page fs/coredump.c:893 [inline] dump_user_range+0x3a7/0x550 fs/coredump.c:954 elf_core_dump+0x1aeb/0x1c30 fs/binfmt_elf.c:2116 do_coredump+0xfa7/0x1810 fs/coredump.c:767 get_signal+0xdc1/0x1080 kernel/signal.c:2902 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x9a/0x130 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 exc_general_protection+0x33d/0x4d0 arch/x86/kernel/traps.c:644 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617 read to 0xffff8881085e5910 of 8 bytes by task 3649 on cpu 0: __percpu_counter_limited_add+0xfa/0x450 percpu_counter_limited_add include/linux/percpu_counter.h:77 [inline] shmem_inode_acct_blocks+0xf5/0x230 mm/shmem.c:228 shmem_alloc_and_add_folio mm/shmem.c:1814 [inline] shmem_get_folio_gfp+0x5e2/0xd80 mm/shmem.c:2188 shmem_get_folio mm/shmem.c:2293 [inline] shmem_write_begin+0xa0/0x1c0 mm/shmem.c:2898 generic_perform_write+0x1b4/0x580 mm/filemap.c:4019 shmem_file_write_iter+0xc8/0xf0 mm/shmem.c:3074 __kernel_write_iter+0x24f/0x4e0 fs/read_write.c:523 dump_emit_page fs/coredump.c:893 [inline] dump_user_range+0x3a7/0x550 fs/coredump.c:954 elf_core_dump+0x1aeb/0x1c30 fs/binfmt_elf.c:2116 do_coredump+0xfa7/0x1810 fs/coredump.c:767 get_signal+0xdc1/0x1080 kernel/signal.c:2902 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x9a/0x130 kernel/entry/common.c:231 irqentry_exit+0x12/0x50 kernel/entry/common.c:334 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 value changed: 0x00000000000034da -> 0x00000000000034fb Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3649 Comm: syz.4.378 Not tainted 6.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ================================================================== syz.4.378 (3649) used greatest stack depth: 10520 bytes left
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/08/19 06:20 | upstream | 47ac09b91bef | dbc93b08 | .config | console log | report | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | upstream test error: KCSAN: data-race in __percpu_counter_limited_add / __percpu_counter_limited_add |