syzbot


KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark (2)

Status: moderation: reported on 2025/02/05 01:47
Subsystems: fs mm
[Documentation on labels]
Reported-by: syzbot+e9faaed5d742e1ece42a@syzkaller.appspotmail.com
First crash: 128d, last: 4h28m
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark fs mm 143 1168d 1445d 0/28 auto-closed as invalid on 2022/05/06 12:50

Sample crash report:
==================================================================
BUG: KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark

write to 0xffff888106ee5844 of 4 bytes by task 4513 on cpu 1:
 xa_mark_set lib/xarray.c:71 [inline]
 xas_set_mark+0x12b/0x140 lib/xarray.c:900
 __folio_start_writeback+0x1dd/0x440 mm/page-writeback.c:3073
 ext4_bio_write_folio+0x5ad/0x9f0 fs/ext4/page-io.c:583
 mpage_submit_folio+0xe4/0x170 fs/ext4/inode.c:2057
 mpage_process_page_bufs+0x39b/0x4a0 fs/ext4/inode.c:2170
 mpage_prepare_extent_to_map+0x741/0xaa0 fs/ext4/inode.c:2675
 ext4_do_writepages+0xa1a/0x21c0 fs/ext4/inode.c:2861
 ext4_writepages+0x176/0x300 fs/ext4/inode.c:2953
 do_writepages+0x1c6/0x310 mm/page-writeback.c:2636
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 file_write_and_wait_range+0x156/0x2c0 mm/filemap.c:794
 generic_buffers_fsync_noflush+0x45/0x120 fs/buffer.c:609
 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline]
 ext4_sync_file+0x1ab/0x690 fs/ext4/fsync.c:147
 vfs_fsync_range+0x10d/0x130 fs/sync.c:187
 generic_write_sync include/linux/fs.h:3027 [inline]
 ext4_buffered_write_iter+0x34f/0x3c0 fs/ext4/file.c:305
 ext4_dio_write_iter fs/ext4/file.c:613 [inline]
 ext4_file_write_iter+0xdbf/0xf00 fs/ext4/file.c:721
 iter_file_splice_write+0x5f2/0x970 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0x156/0x2a0 fs/splice.c:1158
 splice_direct_to_actor+0x312/0x680 fs/splice.c:1102
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0xda/0x150 fs/splice.c:1227
 do_sendfile+0x380/0x650 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64 fs/read_write.c:1417 [inline]
 __x64_sys_sendfile64+0x105/0x150 fs/read_write.c:1417
 x64_sys_call+0xb39/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888106ee5844 of 4 bytes by task 4519 on cpu 0:
 xa_marked include/linux/xarray.h:424 [inline]
 mapping_tagged include/linux/fs.h:540 [inline]
 filemap_fdatawrite_wbc mm/filemap.c:382 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 filemap_write_and_wait_range+0xfc/0x340 mm/filemap.c:691
 filemap_invalidate_pages+0xa4/0x1a0 mm/filemap.c:2815
 kiocb_invalidate_pages+0x6e/0x80 mm/filemap.c:2834
 __iomap_dio_rw+0x5d4/0x1250 fs/iomap/direct-io.c:703
 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:823
 ext4_dio_write_iter fs/ext4/file.c:580 [inline]
 ext4_file_write_iter+0xad9/0xf00 fs/ext4/file.c:721
 iter_file_splice_write+0x5f2/0x970 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0x156/0x2a0 fs/splice.c:1158
 splice_direct_to_actor+0x312/0x680 fs/splice.c:1102
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0xda/0x150 fs/splice.c:1227
 do_sendfile+0x380/0x650 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64 fs/read_write.c:1417 [inline]
 __x64_sys_sendfile64+0x105/0x150 fs/read_write.c:1417
 x64_sys_call+0xb39/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0a000021 -> 0x04000021

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4519 Comm: syz.3.314 Not tainted 6.16.0-rc1-syzkaller-00101-g27605c8c0f69 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
==================================================================

Crashes (77):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/13 07:04 upstream 27605c8c0f69 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/12 09:55 upstream 2c4a1f3fe03e 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/12 01:57 upstream 488ef3560196 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/11 17:33 upstream aef17cb3d3c4 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/11 02:44 upstream aef17cb3d3c4 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/10 19:56 upstream f09079bd04a9 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/10 08:18 upstream f09079bd04a9 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/09 15:54 upstream 19272b37aa4f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/08 22:25 upstream 939f15e640f1 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/08 13:17 upstream 8630c59e9936 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/08 02:17 upstream 5b032cac6225 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/07 09:26 upstream c0c9379f235d 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/06 22:43 upstream c0c9379f235d 9fa58bba .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/06 10:26 upstream e271ed52b344 9fa58bba .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/06 02:55 upstream e271ed52b344 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/05 13:30 upstream ec7714e49479 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/04 23:37 upstream 1af80d00e1e0 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/04 17:42 upstream 1af80d00e1e0 e565f08d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/04 04:04 upstream 5abc7438f1e9 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/03 14:04 upstream 546b1c9e93c2 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/03 06:21 upstream fe4281644c62 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/02 23:18 upstream cd2e103d57e5 b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/02 07:15 upstream cd2e103d57e5 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/01 17:29 upstream bb1556ec9464 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/06/01 02:20 upstream 4cb6c8af8591 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/31 12:15 upstream 0f70f5b08a47 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/31 09:53 upstream 8477ab143069 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/30 10:52 upstream f66bc387efbe 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/30 03:45 upstream e0797d3b91de 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/28 22:05 upstream 3d413f0cfd7e 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/28 13:41 upstream feacb1774bd5 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/27 18:40 upstream dd3922cf9d4d 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/26 20:47 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/25 13:17 upstream d0c22de9995b ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/25 00:10 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/25 00:09 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/25 00:09 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/25 00:09 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/23 17:01 upstream eccf6f2f6ab9 f8cc0c83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/22 00:24 upstream 4a95bc121ccd dc5d3808 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/21 07:37 upstream b36ddb9210e6 b47f9e02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/21 07:29 upstream b36ddb9210e6 b47f9e02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/21 07:28 upstream b36ddb9210e6 b47f9e02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/20 01:32 upstream a5806cd506af b84f0537 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/18 23:39 upstream a5806cd506af f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/18 08:08 upstream 5723cc3450bc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/17 20:37 upstream 172a9d94339c f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/16 21:05 upstream 3c21441eeffc cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/16 14:08 upstream fee3e843b309 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/13 21:51 upstream 405e6c37c89e 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/13 21:50 upstream 405e6c37c89e 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/05/12 23:12 upstream 82f2b0b97b36 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/27 03:14 upstream 5bc1018675ec c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/26 17:35 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/26 17:34 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/22 20:33 upstream a33b5a08cbbd 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/21 17:57 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/01 22:41 upstream 08733088b566 b8645499 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/04/01 22:40 upstream 08733088b566 b8645499 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/31 20:52 upstream 4e82c87058f4 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/31 00:27 upstream aa918db707fb d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/30 07:51 upstream 7f2ff7b62617 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/29 13:48 upstream 7d06015d936c cf25e2c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/29 13:47 upstream 7d06015d936c cf25e2c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/29 00:42 upstream 15cb9a2b66fc 9a1a9e31 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/27 18:39 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/03/17 10:40 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
2025/02/05 01:46 upstream d009de7d5428 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in filemap_write_and_wait_range / xas_set_mark
* Struck through repros no longer work on HEAD.