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KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr (5)

Status: moderation: reported on 2024/07/05 14:13
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+001e0f4dc8703945a00f@syzkaller.appspotmail.com
First crash: 220d, last: 1d00h
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr (2) mm 4 1236d 1298d 0/28 auto-closed as invalid on 2021/10/28 10:08
upstream KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr (3) mm 1 1170d 1170d 0/28 auto-closed as invalid on 2022/01/02 06:59
upstream KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr (4) mm 1 1065d 1065d 0/28 auto-closed as invalid on 2022/04/17 18:38
upstream KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr mm 2 1346d 1351d 0/28 auto-closed as invalid on 2021/07/10 05:40

Sample crash report:
==================================================================
BUG: KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr

read-write to 0xffff888124f296a0 of 8 bytes by task 10149 on cpu 1:
 shmem_add_to_page_cache+0x3b9/0x4b0 mm/shmem.c:901
 shmem_alloc_and_add_folio mm/shmem.c:1928 [inline]
 shmem_get_folio_gfp+0x4f6/0xd90 mm/shmem.c:2522
 shmem_get_folio mm/shmem.c:2628 [inline]
 shmem_write_begin+0xa2/0x180 mm/shmem.c:3278
 generic_perform_write+0x1a8/0x4a0 mm/filemap.c:4189
 shmem_file_write_iter+0xc2/0xe0 mm/shmem.c:3454
 __kernel_write_iter+0x247/0x4c0 fs/read_write.c:612
 dump_emit_page fs/coredump.c:884 [inline]
 dump_user_range+0x3ac/0x550 fs/coredump.c:945
 elf_core_dump+0x1bf4/0x1cf0 fs/binfmt_elf.c:2129
 do_coredump+0x171e/0x1c90 fs/coredump.c:758
 get_signal+0xd4f/0x1000 kernel/signal.c:3021
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 irqentry_exit_to_user_mode+0xa7/0x120 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

read to 0xffff888124f296a0 of 8 bytes by task 6267 on cpu 0:
 shmem_getattr+0x69/0x200 mm/shmem.c:1237
 vfs_getattr_nosec fs/stat.c:208 [inline]
 vfs_getattr fs/stat.c:246 [inline]
 vfs_statx_path+0x178/0x2f0 fs/stat.c:283
 vfs_statx+0xe1/0x170 fs/stat.c:349
 vfs_fstatat fs/stat.c:368 [inline]
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat+0xdc/0x300 fs/stat.c:526
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:526
 x64_sys_call+0x236d/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:263
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000213 -> 0x0000000000000214

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 6267 Comm: syz-executor Tainted: G        W          6.14.0-rc1-syzkaller-00276-g69b54314c975 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================

Crashes (64):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/10 03:21 upstream 69b54314c975 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/02/08 08:42 upstream 7ee983c850b4 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/02/03 07:13 upstream d79bc8f79baa 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/31 06:34 upstream 69e858e0b8b2 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/30 10:31 upstream ebbb8be421ee afe4eff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/26 21:50 upstream c2da8b3f914f 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/26 06:58 upstream 0f8e26b38d7a 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/23 13:32 upstream 21266b8df522 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/22 23:53 upstream df60eac9efe8 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/21 14:34 upstream 95ec54a420b8 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/20 13:04 upstream ffd294d346d1 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/17 16:26 upstream 9bffa1ad25b8 953d1c45 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/12 00:01 upstream b62cef9a5c67 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/11 11:58 upstream 77a903cd8e5a 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/08 01:32 upstream 09a0fa92e5b4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/05 07:31 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2025/01/01 16:35 upstream ccb98ccef0e5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/28 23:46 upstream 059dd502b263 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/28 16:18 upstream fd0584d220fe d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/28 00:16 upstream 8379578b11d5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/27 13:18 upstream d6ef8b40d075 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/20 00:03 upstream baaa2567a712 5905cb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/19 02:19 upstream eabcdba3ad40 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/14 08:47 upstream 243f750a2df0 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/13 14:56 upstream 150b567e0d57 3547e30f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/11 17:46 upstream f92f4749861b ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/09 12:41 upstream fac04efc5c79 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/07 01:02 upstream 9a6e8c7c3a02 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/12/06 20:35 upstream b8f52214c61a 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/30 15:57 upstream 2ba9f676d0a2 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/29 21:41 upstream 509f806f7f70 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/29 10:49 upstream 7af08b57bcb9 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/26 23:31 upstream 445d9f05fa14 e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/24 10:44 upstream 9f16d5e6f220 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/23 04:44 upstream 06afb0f36106 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/22 03:44 upstream 28eb75e178d3 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/21 20:51 upstream 43fb83c17ba2 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/21 03:07 upstream 8f7c8b88bda4 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/19 23:28 upstream 158f238aa69d 7d02db5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/16 14:11 upstream e8bdb3c8be08 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/12 06:47 upstream 2d5404caa8c7 75bb1b32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/09 22:40 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/08 08:54 upstream 906bd684e4b1 179b040e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/03 03:44 upstream 11066801dd4b f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/11/01 05:45 upstream 5635f189425e 96eb609f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/10/27 15:05 upstream 850925a8133c 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/10/11 19:01 upstream 1d227fcc7222 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/10/07 21:21 upstream 87d6aab2389e d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/10/07 08:41 upstream 8cf0b93919e1 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/10/03 19:46 upstream 7ec462100ef9 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/10/03 06:34 upstream f23aa4c0761a a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/09/12 21:37 upstream 77f587896757 60e1a995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/09/01 20:50 upstream 431c1646e1f8 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/08/24 11:50 upstream 60f0560f53e3 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/08/15 22:09 upstream 1fb918967b56 e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/08/11 12:30 upstream 5189dafa4cf9 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/08/07 02:19 upstream eb5e56d14912 1ef9fe42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/08/03 13:16 upstream 17712b7ea075 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/07/28 05:12 upstream ff30564411ff 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/07/26 20:30 upstream 2f8c4f506285 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/07/22 20:58 upstream 933069701c1b df655b64 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/07/18 22:09 upstream b1bc554e009e 71884c12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/07/15 14:33 upstream 0c3836482481 c605e6a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
2024/07/05 14:13 upstream 661e504db04c 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shmem_add_to_page_cache / shmem_getattr
* Struck through repros no longer work on HEAD.