syzbot


KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range (2)

Status: auto-closed as invalid on 2021/11/20 00:15
Subsystems: fs mm
[Documentation on labels]
Reported-by: syzbot+07c64eb90f8d46abb4c1@syzkaller.appspotmail.com
First crash: 1361d, last: 885d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range ext4 18 1373d 1584d 0/26 closed as invalid on 2020/06/18 14:24

Sample crash report:
loop7: detected capacity change from 0 to 1036
==================================================================
BUG: KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range

write to 0xffff8881010b2ca8 of 8 bytes by task 3218 on cpu 0:
 __add_to_page_cache_locked+0x276/0x4f0 mm/filemap.c:931
 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:984
 page_cache_ra_unbounded+0x274/0x430 mm/readahead.c:222
 ondemand_readahead+0x58c/0x7c0
 page_cache_async_ra+0x17e/0x1a0 mm/readahead.c:609
 page_cache_async_readahead include/linux/pagemap.h:906 [inline]
 filemap_readahead mm/filemap.c:2520 [inline]
 filemap_get_pages mm/filemap.c:2561 [inline]
 filemap_read+0x4c0/0x1220 mm/filemap.c:2628
 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2779
 blkdev_read_iter+0xb9/0xf0 block/fops.c:545
 call_read_iter include/linux/fs.h:2157 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x66c/0x750 fs/read_write.c:485
 ksys_read+0xd9/0x190 fs/read_write.c:623
 __do_sys_read fs/read_write.c:633 [inline]
 __se_sys_read fs/read_write.c:631 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:631
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881010b2ca8 of 8 bytes by task 27593 on cpu 1:
 mapping_needs_writeback mm/filemap.c:639 [inline]
 file_write_and_wait_range+0x4b/0x240 mm/filemap.c:809
 blkdev_fsync+0x4a/0xa0 block/fops.c:412
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2955 [inline]
 blkdev_write_iter+0x272/0x2c0 block/fops.c:521
 call_write_iter include/linux/fs.h:2163 [inline]
 do_iter_readv_writev+0x2de/0x380 fs/read_write.c:729
 do_iter_write+0x192/0x5c0 fs/read_write.c:855
 vfs_iter_write+0x4c/0x70 fs/read_write.c:896
 iter_file_splice_write+0x43a/0x790 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x63e/0xbb0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1314 [inline]
 __se_sys_sendfile64 fs/read_write.c:1300 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000000000000006c -> 0x0000000000000074

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 27593 Comm: syz-executor.4 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Buffer I/O error on dev loop7, logical block 0, async page read

Crashes (135):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/10/16 00:15 upstream 8fe31e0995f0 0c5d9412 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/10/05 12:37 upstream f6274b06e326 8a6b1a8d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/09/02 06:11 upstream 835d31d319d9 7eb7e152 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/08/05 07:23 upstream 251a1524293d 7f7bb950 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/30 06:52 upstream 764a5bc89b12 c585c7b0 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/29 20:45 upstream 7e96bf476270 8a799410 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/24 10:50 upstream f0fddcec6b62 4d1b57d4 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/21 20:30 upstream 7b6ae471e541 29c3f20f .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/19 17:49 upstream 2734d6c1b1a0 e6a17580 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/19 00:20 upstream f0eb870a8422 f115ae98 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/17 20:55 upstream d980cc0620ae f115ae98 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/16 09:59 upstream d936eb238744 f115ae98 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/12 18:22 upstream e73f0f0ee754 f415556d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/08 07:08 upstream 3dbdb38e2869 1aade754 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/07/02 17:34 upstream 3dbdb38e2869 55aa55c2 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/06/29 14:23 upstream c54b245d0118 9d2ab5df .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/06/29 00:56 upstream 122fa8c58831 9d2ab5df .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/06/26 00:49 upstream 44db63d1ad8d ae6bf8dd .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/06/15 15:32 upstream 009c9aa5be65 8022d7e3 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/06/09 13:04 upstream 368094df48e6 84fe5d96 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/25 03:25 upstream 1434a3127887 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/21 22:35 upstream 79a106fc6585 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/20 12:03 upstream c3d0e3fd41b7 c560a65d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/18 04:19 upstream 8ac91e6c6033 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/10 02:42 upstream 9819f682e48c bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/09 14:04 upstream b741596468b0 bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/05/04 14:54 upstream 5e321ded302d 06c27ff5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/29 10:37 upstream d72cd4ad4174 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/24 01:38 upstream 8db5efb83fa9 17f0b706 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/22 23:00 upstream 90c911ad7445 33c28d03 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/21 21:02 upstream 16fc44d6387e 2bc8999a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/19 08:14 upstream bf05bf16c76b 50f523d7 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/17 20:56 upstream 194cf4825638 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/16 18:56 upstream 2f7b98d1e55c 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/16 06:16 upstream 7e25f40eab52 c59079a6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/15 16:39 upstream 7f75285ca572 c59079a6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/14 12:47 upstream 50987beca096 3134b37f .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/10 16:16 upstream d4961772226d 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/10 04:12 upstream 4e04e7513b0f 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/09 11:50 upstream 17e7124aad76 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/08 10:49 upstream 454859c552da 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/05 20:57 upstream 0a50438c8436 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/04/02 23:49 upstream 0a84c2e440f7 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/03/31 06:21 upstream 5e46d1b78a03 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/03/30 23:11 upstream 2bb25b3a748a 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/03/25 11:43 upstream e138138003eb 6a383ecf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
2021/01/16 07:20 upstream 1d94330a437a 65a7a854 .config console log report info ci2-upstream-kcsan-gce
2020/11/06 23:18 upstream bf3e76289cd2 cba33199 .config console log report info ci2-upstream-kcsan-gce
2020/11/04 03:41 upstream 4ef8451b3326 cba33199 .config console log report info ci2-upstream-kcsan-gce
2020/06/26 17:13 upstream 4a21185cda0f 9506ea6d .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.