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KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (7)

Status: auto-obsoleted due to no activity on 2024/02/03 09:04
Subsystems: exfat
[Documentation on labels]
Reported-by: syzbot+e78344287a01a6308bb3@syzkaller.appspotmail.com
First crash: 228d, last: 145d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (8) exfat 1 95d 95d 0/26 auto-obsoleted due to no activity on 2024/03/30 16:35
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (4) ext4 5 1258d 1270d 0/26 auto-closed as invalid on 2021/01/23 11:44
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers exfat 8 1582d 1651d 0/26 auto-closed as invalid on 2020/04/08 22:27
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (3) exfat 10 1343d 1435d 0/26 auto-closed as invalid on 2020/10/29 18:32
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (2) exfat 1 1472d 1472d 0/26 closed as invalid on 2020/06/18 14:13
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (6) exfat 174 266d 908d 0/26 auto-obsoleted due to no activity on 2023/10/11 19:19
upstream KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers (5) exfat 32 948d 1175d 0/26 auto-closed as invalid on 2021/11/29 11:14

Sample crash report:
loop5: detected capacity change from 0 to 8192
==================================================================
BUG: KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers

write to 0xffff88813dbd0cf0 of 8 bytes by task 22571 on cpu 0:
 __remove_assoc_queue fs/buffer.c:517 [inline]
 fsync_buffers_list fs/buffer.c:785 [inline]
 sync_mapping_buffers+0x165/0x7d0 fs/buffer.c:578
 fat_file_fsync+0xad/0x100 fs/fat/file.c:195
 vfs_fsync_range+0x111/0x120 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2653 [inline]
 generic_file_write_iter+0x191/0x1c0 mm/filemap.c:4052
 do_iter_write+0x4ad/0x770 fs/read_write.c:860
 vfs_iter_write+0x56/0x70 fs/read_write.c:901
 iter_file_splice_write+0x462/0x7e0 fs/splice.c:736
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0x8a/0xb0 fs/splice.c:1142
 splice_direct_to_actor+0x31d/0x690 fs/splice.c:1088
 do_splice_direct+0x10d/0x190 fs/splice.c:1194
 do_sendfile+0x3c4/0x980 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1316 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0xbd/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88813dbd0cf0 of 8 bytes by task 22547 on cpu 1:
 mark_buffer_dirty_inode+0x96/0x1c0 fs/buffer.c:681
 fat_mirror_bhs+0x247/0x340 fs/fat/fatent.c:398
 fat_alloc_clusters+0x973/0xa60 fs/fat/fatent.c:543
 fat_add_cluster fs/fat/inode.c:108 [inline]
 __fat_get_block fs/fat/inode.c:155 [inline]
 fat_get_block+0x25c/0x5e0 fs/fat/inode.c:190
 __block_write_begin_int+0x3b7/0xf40 fs/buffer.c:2119
 __block_write_begin fs/buffer.c:2168 [inline]
 block_write_begin+0x7b/0x170 fs/buffer.c:2227
 cont_write_begin+0x479/0x690 fs/buffer.c:2582
 fat_write_begin+0x61/0xf0 fs/fat/inode.c:230
 cont_expand_zero fs/buffer.c:2509 [inline]
 cont_write_begin+0x182/0x690 fs/buffer.c:2572
 fat_write_begin+0x61/0xf0 fs/fat/inode.c:230
 generic_cont_expand_simple+0xa7/0x140 fs/buffer.c:2473
 fat_cont_expand+0x3a/0x160 fs/fat/file.c:223
 fat_setattr+0x2a9/0x840 fs/fat/file.c:513
 notify_change+0x866/0x8e0 fs/attr.c:499
 do_truncate+0x116/0x150 fs/open.c:66
 do_sys_ftruncate+0x2ba/0x3b0 fs/open.c:194
 __do_sys_ftruncate fs/open.c:205 [inline]
 __se_sys_ftruncate fs/open.c:203 [inline]
 __x64_sys_ftruncate+0x33/0x40 fs/open.c:203
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0xffff88813db48518 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22547 Comm: syz-executor.5 Not tainted 6.7.0-rc8-syzkaller-00159-ga4ab2706bb12 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
==================================================================

Crashes (42):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/01/06 06:03 upstream a4ab2706bb12 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2024/01/04 20:50 upstream 5eff55d725a4 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2024/01/01 17:26 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/30 22:46 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/30 09:30 upstream f016f7547aee fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/29 11:34 upstream 8735c7c84d1b fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/28 01:11 upstream f5837722ffec fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/24 11:39 upstream 861deac3b092 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/23 23:26 upstream 3f82f1c3a036 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/23 06:09 upstream 5254c0cbc92d fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/23 00:14 upstream 24e0d2e527a3 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/22 10:22 upstream 24e0d2e527a3 4f9530a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/22 03:14 upstream 9a6b294ab496 4f9530a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/19 08:20 upstream 2cf4f94d8e86 3ad490ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/18 12:13 upstream ceb6a6f023fd 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/17 19:03 upstream 0e389834672c 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/17 03:17 upstream 3b8a9b2e6809 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/15 08:07 upstream c7402612e2e6 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/13 09:03 upstream 88035e5694a8 ebcad15c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/12 08:35 upstream 26aff849438c 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/11 20:13 upstream a39b6ac3781d 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/09 07:23 upstream f2e8a57ee903 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/07 21:41 upstream 9ace34a8e446 0a02ce36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/07 20:02 upstream bee0e7762ad2 0a02ce36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/07 02:54 upstream bee0e7762ad2 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/12/01 08:07 upstream e8f60209d6cf f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/30 01:58 upstream 3b47bc037bd4 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/25 20:53 upstream b46ae77f6787 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/25 10:07 upstream 0f5cc96c367f 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/24 16:24 upstream f1a09972a45a 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/22 04:29 upstream c2d5304e6c64 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/18 20:43 upstream 23dfa043f6d5 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/17 00:38 upstream 7475e51b8796 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/14 03:36 upstream 9bacdd8996c7 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/05 05:13 upstream aea6bf908d73 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/11/03 16:07 upstream 8f6f76a6a29f c4ac074c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/10/26 09:36 upstream 611da07b89fd 72e794c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/10/25 02:39 upstream d88520ad73b7 17e6d526 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/10/21 12:47 upstream 9c5d00cb7b6b 361b23dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/10/21 01:59 upstream c8045b4a33a5 361b23dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/10/15 06:25 upstream 70f8c6f8f880 f757a323 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
2023/10/14 16:11 upstream 8cb1f10d8c4b f757a323 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in mark_buffer_dirty_inode / sync_mapping_buffers
* Struck through repros no longer work on HEAD.