syzbot


KCSAN: data-race in generic_fillattr / inode_add_bytes

Status: moderation: reported on 2024/07/10 12:20
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+a088f9d6bf95dc66a923@syzkaller.appspotmail.com
First crash: 216d, last: 16h55m

Sample crash report:
==================================================================
BUG: KCSAN: data-race in generic_fillattr / inode_add_bytes

read-write to 0xffff888106488f90 of 8 bytes by task 2163 on cpu 0:
 __inode_add_bytes fs/stat.c:906 [inline]
 inode_add_bytes+0x45/0xd0 fs/stat.c:919
 __dquot_alloc_space+0x181/0x8a0 fs/quota/dquot.c:1695
 dquot_alloc_space_nodirty include/linux/quotaops.h:299 [inline]
 dquot_alloc_block_nodirty include/linux/quotaops.h:326 [inline]
 shmem_inode_acct_blocks+0x124/0x230 mm/shmem.c:238
 shmem_alloc_and_add_folio mm/shmem.c:1932 [inline]
 shmem_get_folio_gfp+0x5be/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 0xffff888106488f90 of 8 bytes by task 14924 on cpu 1:
 generic_fillattr+0x274/0x330 fs/stat.c:106
 shmem_getattr+0x17b/0x200 mm/shmem.c:1249
 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: 0x00000000000057a8 -> 0x00000000000057b0

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 14924 Comm: syz-executor Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
==================================================================

Crashes (55):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/11 16:01 upstream febbc555cf0f f2baddf5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/02/11 06:38 upstream febbc555cf0f 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/02/10 15:00 upstream a64dcfb451e2 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/02/04 15:10 upstream 0de63bb7d919 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/02/03 15:39 upstream 2014c95afece a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/31 06:38 upstream 69e858e0b8b2 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/30 23:50 upstream 72deda0abee6 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/27 00:03 upstream c2da8b3f914f 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/25 19:55 upstream 0f8e26b38d7a 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/23 05:37 upstream df60eac9efe8 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/21 11:38 upstream 95ec54a420b8 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/18 11:35 upstream 595523945be0 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/18 00:39 upstream 9bffa1ad25b8 953d1c45 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/14 12:34 upstream c45323b7560e b1f1cd88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/13 11:35 upstream 5bc55a333a2f 249ceea9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/12 15:24 upstream b62cef9a5c67 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/11 03:41 upstream 2144da25584e 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/09 13:46 upstream eea6e4b4dfb8 9220929f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/07 02:49 upstream fbfd64d25c7a f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/03 16:47 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2025/01/01 23:20 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/28 20:29 upstream fd0584d220fe d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/28 03:41 upstream 8379578b11d5 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/27 00:57 upstream d6ef8b40d075 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/25 15:13 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/22 22:17 upstream bcde95ce32b6 b4fbdbd4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/22 11:46 upstream 48f506ad0b68 b4fbdbd4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/22 08:13 upstream 48f506ad0b68 d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/20 11:33 upstream 8faabc041a00 0f61b415 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/19 01:01 upstream eabcdba3ad40 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/17 15:50 upstream f44d154d6e3d f93b2b55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/16 03:45 upstream 78d4f34e2115 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/15 09:43 upstream a0e3919a2df2 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/14 09:39 upstream a446e965a188 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/14 08:32 upstream 243f750a2df0 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/13 09:12 upstream 150b567e0d57 3547e30f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/12/13 04:23 upstream 150b567e0d57 530e80f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/11/27 20:53 upstream 7d4050728c83 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/11/26 12:27 upstream 2c22dc1ee3a1 e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/11/19 21:51 upstream 158f238aa69d 7d02db5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/10/19 16:04 upstream 3d5ad2d4eca3 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/10/17 02:08 upstream c964ced77262 666f77ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/10/12 12:12 upstream 09f6b0c8904b 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/10/05 11:47 upstream 27cc6fdf7201 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/09/26 15:17 upstream 11a299a7933e 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/09/14 02:57 upstream 196145c606d0 b58f933c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/08/31 03:25 upstream 20371ba12063 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/08/26 20:20 upstream 5be63fc19fca 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/08/19 22:28 upstream 47ac09b91bef 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/08/16 07:16 upstream d7a5aa4b3c00 e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/08/15 07:27 upstream d07b43284ab3 e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/08/06 13:21 upstream b446a2dae984 e1bdb00a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/07/27 17:28 upstream 3a7e02c040b1 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/07/27 04:13 upstream 2f8c4f506285 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
2024/07/10 12:19 upstream 34afb82a3c67 bc144f9a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in generic_fillattr / inode_add_bytes
* Struck through repros no longer work on HEAD.