syzbot


KCSAN: data-race in lru_add_drain_all / pagevec_lru_move_fn (3)

Status: auto-closed as invalid on 2021/01/16 23:52
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+acf152fdb6c3552de3dc@syzkaller.appspotmail.com
First crash: 1298d, last: 1201d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in lru_add_drain_all / pagevec_lru_move_fn (2) mm 20 1443d 1589d 0/26 auto-closed as invalid on 2020/06/18 13:23
upstream KCSAN: data-race in lru_add_drain_all / pagevec_lru_move_fn (4) mm 1 1165d 1165d 0/26 auto-closed as invalid on 2021/02/21 12:14
upstream KCSAN: data-race in lru_add_drain_all / pagevec_lru_move_fn mm 2 1607d 1616d 0/26 closed as invalid on 2019/11/19 13:24

Sample crash report:
==================================================================
BUG: KCSAN: data-race in lru_add_drain_all / pagevec_lru_move_fn

write to 0xffff88813bc276f0 of 1 bytes by task 22529 on cpu 0:
 pagevec_reinit include/linux/pagevec.h:63 [inline]
 pagevec_lru_move_fn+0x175/0x190 mm/swap.c:232
 __pagevec_lru_add mm/swap.c:1070 [inline]
 lru_add_drain_cpu+0x75/0x290 mm/swap.c:630
 lru_add_drain+0x30/0x70 mm/swap.c:734
 follow_page_pte+0x9ae/0xb90 mm/gup.c:529
 follow_pmd_mask+0x4b0/0xeb0 mm/gup.c:607
 follow_pud_mask mm/gup.c:702 [inline]
 follow_p4d_mask mm/gup.c:728 [inline]
 follow_page_mask+0x382/0x540 mm/gup.c:787
 __get_user_pages+0x8a7/0xe50 mm/gup.c:1095
 populate_vma_page_range mm/gup.c:1430 [inline]
 __mm_populate+0x24d/0x340 mm/gup.c:1478
 mm_populate include/linux/mm.h:2590 [inline]
 __do_sys_mlockall mm/mlock.c:828 [inline]
 __se_sys_mlockall+0x22b/0x250 mm/mlock.c:804
 __x64_sys_mlockall+0x1b/0x20 mm/mlock.c:804
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88813bc276f0 of 1 bytes by task 4901 on cpu 1:
 pagevec_count include/linux/pagevec.h:68 [inline]
 lru_add_drain_all+0x108/0x3c0 mm/swap.c:837
 invalidate_bdev+0x50/0x70 fs/block_dev.c:96
 blk_drop_partitions+0x5a/0x1d0 block/partitions/core.c:636
 bdev_disk_changed+0x88/0x310 fs/block_dev.c:1393
 blkdev_reread_part block/ioctl.c:103 [inline]
 blkdev_common_ioctl+0xdbb/0x1170 block/ioctl.c:552
 blkdev_ioctl+0x16e/0x3f0 block/ioctl.c:621
 block_ioctl+0x6d/0x80 fs/block_dev.c:1869
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4901 Comm: systemd-udevd Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/12/12 23:51 upstream 7b1b868e1d91 bca53db9 .config console log report info ci2-upstream-kcsan-gce
2020/12/11 02:33 upstream 9fca90cf2892 f900b48c .config console log report info ci2-upstream-kcsan-gce
2020/12/05 18:01 upstream b3298500b23f 0ef84591 .config console log report info ci2-upstream-kcsan-gce
2020/11/30 05:55 upstream b65054597872 a0092f9d .config console log report info ci2-upstream-kcsan-gce
2020/11/22 17:01 upstream a349e4c65960 0d27f508 .config console log report info ci2-upstream-kcsan-gce
2020/11/12 11:43 upstream 3d5e28bff7ad 77a55c8e .config console log report info ci2-upstream-kcsan-gce
2020/10/20 14:08 upstream 270315b8235e ff4a3345 .config console log report info ci2-upstream-kcsan-gce
2020/10/06 11:32 upstream 7575fdda569b 1880b4a9 .config console log report info ci2-upstream-kcsan-gce
2020/09/06 16:53 upstream dd9fb9bb3340 abf9ba4f .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.