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KCSAN: data-race in delete_from_page_cache_batch / page_mapping

Status: auto-closed as invalid on 2020/06/18 13:43
Subsystems: ext4
[Documentation on labels]
First crash: 1638d, last: 1465d
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in delete_from_page_cache_batch / page_mapping (3) ext4 1 1269d 1234d 0/26 auto-closed as invalid on 2020/12/21 11:15
upstream KCSAN: data-race in delete_from_page_cache_batch / page_mapping (5) block 192 905d 1038d 0/26 auto-closed as invalid on 2021/12/06 07:47
upstream KCSAN: data-race in delete_from_page_cache_batch / page_mapping (4) isofs 3 1206d 1218d 0/26 auto-closed as invalid on 2021/02/08 17:09
upstream KCSAN: data-race in delete_from_page_cache_batch / page_mapping (2) fs 2 1320d 1352d 0/26 auto-closed as invalid on 2020/10/17 07:02

Sample crash report:
==================================================================
BUG: KCSAN: data-race in delete_from_page_cache_batch / page_mapping

write to 0xffffea00047c2018 of 8 bytes by task 16490 on cpu 0:
 page_cache_delete_batch mm/filemap.c:326 [inline]
 delete_from_page_cache_batch+0x672/0x780 mm/filemap.c:357
 truncate_inode_pages_range+0x52f/0x1010 mm/truncate.c:366
 truncate_inode_pages+0x2a/0x40 mm/truncate.c:476
 kill_bdev+0x7f/0xa0 fs/block_dev.c:87
 set_blocksize+0x18e/0x1c0 fs/block_dev.c:137
 sb_set_blocksize+0x3d/0xc0 fs/block_dev.c:146
 ext4_fill_super+0x16e6/0x79a0 fs/ext4/super.c:4118
 mount_bdev+0x264/0x2d0 fs/super.c:1417
 ext4_mount+0x38/0x50 fs/ext4/super.c:6112
 legacy_get_tree+0x78/0xf0 fs/fs_context.c:622
 vfs_get_tree+0x52/0x190 fs/super.c:1547
 do_new_mount fs/namespace.c:2816 [inline]
 do_mount+0xff0/0x1590 fs/namespace.c:3141
 __do_sys_mount fs/namespace.c:3350 [inline]
 __se_sys_mount fs/namespace.c:3327 [inline]
 __x64_sys_mount+0x12b/0x1a0 fs/namespace.c:3327
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea00047c2018 of 8 bytes by task 16510 on cpu 1:
 page_mapping+0x178/0x290 mm/util.c:675
 page_evictable mm/internal.h:84 [inline]
 __pagevec_lru_add_fn+0xdf/0x8c0 mm/swap.c:963
 pagevec_lru_move_fn+0xf5/0x170 mm/swap.c:211
 __pagevec_lru_add mm/swap.c:987 [inline]
 __lru_cache_add+0x119/0x1c0 mm/swap.c:411
 lru_cache_add mm/swap.c:447 [inline]
 lru_cache_add_active_or_unevictable+0xb0/0x1e0 mm/swap.c:477
 __do_huge_pmd_anonymous_page mm/huge_memory.c:645 [inline]
 do_huge_pmd_anonymous_page+0x64b/0x1000 mm/huge_memory.c:778
 create_huge_pmd mm/memory.c:4097 [inline]
 __handle_mm_fault+0x2d79/0x2ec0 mm/memory.c:4316
 handle_mm_fault+0x21c/0x540 mm/memory.c:4382
 do_user_addr_fault arch/x86/mm/fault.c:1464 [inline]
 do_page_fault+0x48a/0xa96 arch/x86/mm/fault.c:1535
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16510 Comm: syz-executor.1 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/04/20 12:05 https://github.com/google/ktsan.git kcsan 7c3cd68e5d38 347a5dc3 .config console log report ci2-upstream-kcsan-gce
2020/04/11 10:50 https://github.com/google/ktsan.git kcsan 40959e34d670 a8c6a3f8 .config console log report ci2-upstream-kcsan-gce
2020/04/02 11:04 https://github.com/google/ktsan.git kcsan 40959e34d670 a34e2c33 .config console log report ci2-upstream-kcsan-gce
2020/03/28 09:37 https://github.com/google/ktsan.git kcsan 40959e34d670 831e9a81 .config console log report ci2-upstream-kcsan-gce
2020/03/18 09:07 https://github.com/google/ktsan.git kcsan 941e0d917bbf 97bc55ce .config console log report ci2-upstream-kcsan-gce
2020/03/17 04:41 https://github.com/google/ktsan.git kcsan 941e0d917bbf 749688d2 .config console log report ci2-upstream-kcsan-gce
2020/02/09 02:25 https://github.com/google/ktsan.git kcsan f60f0f543333 06150bf1 .config console log report ci2-upstream-kcsan-gce
2020/01/25 10:29 https://github.com/google/ktsan.git kcsan 245a43005292 2e95ab33 .config console log report ci2-upstream-kcsan-gce
2020/01/16 15:13 https://github.com/google/ktsan.git kcsan 245a43005292 3de7aabb .config console log report ci2-upstream-kcsan-gce
2020/01/15 07:23 https://github.com/google/ktsan.git kcsan 245a43005292 fa12bd3c .config console log report ci2-upstream-kcsan-gce
2020/01/10 17:26 https://github.com/google/ktsan.git kcsan 245a43005292 532ec44e .config console log report ci2-upstream-kcsan-gce
2020/01/03 16:21 https://github.com/google/ktsan.git kcsan 245a43005292 9dcc1191 .config console log report ci2-upstream-kcsan-gce
2019/12/31 04:01 https://github.com/google/ktsan.git kcsan 245a43005292 6b36d338 .config console log report ci2-upstream-kcsan-gce
2019/12/24 06:53 https://github.com/google/ktsan.git kcsan 245a43005292 be5c2c81 .config console log report ci2-upstream-kcsan-gce
2019/12/22 01:00 https://github.com/google/ktsan.git kcsan 245a43005292 bc586918 .config console log report ci2-upstream-kcsan-gce
2019/12/20 23:27 https://github.com/google/ktsan.git kcsan 245a43005292 34011c05 .config console log report ci2-upstream-kcsan-gce
2019/12/16 13:22 https://github.com/google/ktsan.git kcsan 245a43005292 0ae38e44 .config console log report ci2-upstream-kcsan-gce
2019/12/03 16:08 https://github.com/google/ktsan.git kcsan ef798c30ba4e ab342da3 .config console log report ci2-upstream-kcsan-gce
2019/11/30 15:14 https://github.com/google/ktsan.git kcsan ef798c30ba4e 3a75be00 .config console log report ci2-upstream-kcsan-gce
2019/11/28 10:39 https://github.com/google/ktsan.git kcsan ef798c30ba4e 97264cb1 .config console log report ci2-upstream-kcsan-gce
2019/11/25 12:44 https://github.com/google/ktsan.git kcsan 5863cc791e4c 598ca6c8 .config console log report ci2-upstream-kcsan-gce
2019/11/19 23:43 https://github.com/google/ktsan.git kcsan 5863cc791e4c 432c7650 .config console log report ci2-upstream-kcsan-gce
2019/11/17 09:58 https://github.com/google/ktsan.git kcsan 5863cc791e4c d5696d51 .config console log report ci2-upstream-kcsan-gce
2019/11/13 13:42 https://github.com/google/ktsan.git kcsan 7f2955e0d056 048f2d49 .config console log report ci2-upstream-kcsan-gce
2019/11/10 18:15 https://github.com/google/ktsan.git kcsan 94c006602e13 dc438b91 .config console log report ci2-upstream-kcsan-gce
2019/11/09 20:49 https://github.com/google/ktsan.git kcsan 94c006602e13 1e35461e .config console log report ci2-upstream-kcsan-gce
2019/11/01 11:27 https://github.com/google/ktsan.git kcsan 05f2236801fe a41ca8fa .config console log report ci2-upstream-kcsan-gce
2019/10/30 06:56 https://github.com/google/ktsan.git kcsan 05f2236801fe 5ea87a66 .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.