syzbot


KMSAN: uninit-value in bch2_alloc_v4_invalid

Status: upstream: reported C repro on 2024/05/25 14:55
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+3b2968fa4953885dd66a@syzkaller.appspotmail.com
First crash: 26d, last: 3d16h
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly bcachefs report (Jun 2024) 0 (1) 2024/06/11 08:27
[syzbot] [bcachefs?] KMSAN: uninit-value in bch2_alloc_v4_invalid 0 (2) 2024/06/01 16:53

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in bch2_alloc_v4_invalid+0x625/0x10f0 fs/bcachefs/alloc_background.c:247
 bch2_alloc_v4_invalid+0x625/0x10f0 fs/bcachefs/alloc_background.c:247
 bch2_bkey_val_invalid+0x24f/0x380 fs/bcachefs/bkey_methods.c:140
 bset_key_invalid fs/bcachefs/btree_io.c:831 [inline]
 validate_bset_keys+0x12d8/0x25d0 fs/bcachefs/btree_io.c:904
 validate_bset_for_write+0x1dd/0x340 fs/bcachefs/btree_io.c:1945
 __bch2_btree_node_write+0x4777/0x67c0 fs/bcachefs/btree_io.c:2138
 bch2_btree_node_write+0xa5/0x2e0 fs/bcachefs/btree_io.c:2288
 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline]
 __btree_node_flush+0x4d0/0x640 fs/bcachefs/btree_trans_commit.c:229
 bch2_btree_node_flush0+0x35/0x60 fs/bcachefs/btree_trans_commit.c:238
 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:553
 __bch2_journal_reclaim+0xd88/0x1610 fs/bcachefs/journal_reclaim.c:685
 bch2_journal_reclaim_thread+0x18e/0x760 fs/bcachefs/journal_reclaim.c:727
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was stored to memory at:
 memcpy_u64s_small fs/bcachefs/util.h:511 [inline]
 bkey_p_copy fs/bcachefs/bkey.h:46 [inline]
 bch2_sort_keys+0x1f34/0x2cb0 fs/bcachefs/bkey_sort.c:194
 __bch2_btree_node_write+0x3acd/0x67c0 fs/bcachefs/btree_io.c:2100
 bch2_btree_node_write+0xa5/0x2e0 fs/bcachefs/btree_io.c:2288
 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline]
 __btree_node_flush+0x4d0/0x640 fs/bcachefs/btree_trans_commit.c:229
 bch2_btree_node_flush0+0x35/0x60 fs/bcachefs/btree_trans_commit.c:238
 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:553
 __bch2_journal_reclaim+0xd88/0x1610 fs/bcachefs/journal_reclaim.c:685
 bch2_journal_reclaim_thread+0x18e/0x760 fs/bcachefs/journal_reclaim.c:727
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 __kmalloc_large_node+0x231/0x370 mm/slub.c:3994
 __do_kmalloc_node mm/slub.c:4027 [inline]
 __kmalloc_node+0xb10/0x10c0 mm/slub.c:4046
 kmalloc_node include/linux/slab.h:648 [inline]
 kvmalloc_node+0xc0/0x2d0 mm/util.c:634
 kvmalloc include/linux/slab.h:766 [inline]
 btree_bounce_alloc fs/bcachefs/btree_io.c:118 [inline]
 bch2_btree_node_read_done+0x4e68/0x75e0 fs/bcachefs/btree_io.c:1185
 btree_node_read_work+0x8a5/0x1eb0 fs/bcachefs/btree_io.c:1324
 bch2_btree_node_read+0x3d42/0x4b50
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1748 [inline]
 bch2_btree_root_read+0xa6c/0x13d0 fs/bcachefs/btree_io.c:1772
 read_btree_roots+0x454/0xee0 fs/bcachefs/recovery.c:457
 bch2_fs_recovery+0x7b6a/0x93e0 fs/bcachefs/recovery.c:785
 bch2_fs_start+0x7b2/0xbd0 fs/bcachefs/super.c:1043
 bch2_fs_open+0x152a/0x15f0 fs/bcachefs/super.c:2105
 bch2_mount+0x90d/0x1d90 fs/bcachefs/fs.c:1906
 legacy_get_tree+0x114/0x290 fs/fs_context.c:662
 vfs_get_tree+0xa7/0x570 fs/super.c:1779
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352
 path_mount+0x742/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x725/0x810 fs/namespace.c:3875
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875
 x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 PID: 5067 Comm: bch-reclaim/loo Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
=====================================================

Crashes (210):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/10 13:19 upstream 614da38e2f7a 82c05ab8 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 10:28 upstream 614da38e2f7a 82c05ab8 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 08:29 upstream 614da38e2f7a 82c05ab8 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 01:12 upstream 614da38e2f7a 82c05ab8 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/01 16:52 upstream 614da38e2f7a 3113787f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/13 14:30 upstream 614da38e2f7a 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/13 13:02 upstream 614da38e2f7a 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/13 11:52 upstream 614da38e2f7a 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/13 11:42 upstream 614da38e2f7a 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/11 11:48 upstream 614da38e2f7a c7d7d815 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/11 09:44 upstream 614da38e2f7a 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/11 07:53 upstream 614da38e2f7a 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/11 04:16 upstream 614da38e2f7a 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 16:49 upstream 614da38e2f7a 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 16:28 upstream 614da38e2f7a 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 12:10 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 08:56 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 08:05 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 07:04 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 05:44 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 03:37 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 02:31 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 01:22 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/10 00:16 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/09 22:21 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/09 21:20 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/08 11:23 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/08 10:34 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/08 09:40 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/08 09:33 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/07 10:07 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/07 07:06 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/07 02:11 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/07 00:12 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/06 22:14 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/06 17:34 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/06 16:55 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/06 15:43 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/06 06:58 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:44 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:43 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:42 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:42 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:41 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:41 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:41 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:41 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 23:41 upstream 614da38e2f7a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/06/05 16:21 upstream 614da38e2f7a e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/05/21 14:44 upstream 614da38e2f7a c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in bch2_alloc_v4_invalid
2024/05/23 01:00 upstream 101b7a97143a 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in bch2_alloc_v4_invalid
* Struck through repros no longer work on HEAD.