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[syzbot] [ocfs2?] possible deadlock in ocfs2_nfs_sync_lock | 1 (3) | 2024/08/31 12:50 |
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[syzbot] [ocfs2?] possible deadlock in ocfs2_nfs_sync_lock | 1 (3) | 2024/08/31 12:50 |
Created | Duration | User | Patch | Repo | Result |
---|---|---|---|---|---|
2024/10/02 08:18 | 21m | retest repro | upstream | OK log | |
2024/08/31 12:28 | 21m | hdanton@sina.com | patch | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a18093afa393 | OK log |
====================================================== WARNING: possible circular locking dependency detected 6.11.0-syzkaller-04557-g2f27fce67173 #0 Not tainted ------------------------------------------------------ kswapd0/78 is trying to acquire lock: ffff8880359f0bd0 (&osb->nfs_sync_rwlock){.+.+}-{3:3}, at: ocfs2_nfs_sync_lock+0x109/0x260 fs/ocfs2/dlmglue.c:2876 but task is already holding lock: ffffffff8ea30460 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat mm/vmscan.c:6821 [inline] ffffffff8ea30460 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0xbf1/0x3720 mm/vmscan.c:7203 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (fs_reclaim){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 __fs_reclaim_acquire mm/page_alloc.c:3825 [inline] fs_reclaim_acquire+0x88/0x140 mm/page_alloc.c:3839 might_alloc include/linux/sched/mm.h:334 [inline] slab_pre_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4018 [inline] __kmalloc_cache_noprof+0x3d/0x2c0 mm/slub.c:4185 kmalloc_noprof include/linux/slab.h:690 [inline] kzalloc_noprof include/linux/slab.h:816 [inline] ocfs2_reserve_new_metadata_blocks+0x117/0x9c0 fs/ocfs2/suballoc.c:966 ocfs2_mknod+0x143a/0x2b40 fs/ocfs2/namei.c:345 ocfs2_mkdir+0x1ab/0x480 fs/ocfs2/namei.c:655 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4257 do_mkdirat+0x264/0x3a0 fs/namei.c:4280 __do_sys_mkdir fs/namei.c:4300 [inline] __se_sys_mkdir fs/namei.c:4298 [inline] __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4298 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:815 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x209f/0x4680 fs/ocfs2/inode.c:1216 evict+0x4e8/0x9b0 fs/inode.c:731 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:615 dput+0x19f/0x2b0 fs/dcache.c:857 ovl_check_rename_whiteout fs/overlayfs/super.c:592 [inline] ovl_make_workdir fs/overlayfs/super.c:691 [inline] ovl_get_workdir+0xc6c/0x1920 fs/overlayfs/super.c:814 ovl_fill_super+0x12a8/0x3560 fs/overlayfs/super.c:1382 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb7/0x140 fs/super.c:1299 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:815 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x1b17/0x4680 fs/ocfs2/inode.c:1216 evict+0x4e8/0x9b0 fs/inode.c:731 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:615 dput+0x19f/0x2b0 fs/dcache.c:857 ovl_check_rename_whiteout fs/overlayfs/super.c:592 [inline] ovl_make_workdir fs/overlayfs/super.c:691 [inline] ovl_get_workdir+0xc6c/0x1920 fs/overlayfs/super.c:814 ovl_fill_super+0x12a8/0x3560 fs/overlayfs/super.c:1382 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb7/0x140 fs/super.c:1299 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&osb->nfs_sync_rwlock){.+.+}-{3:3}: check_prev_add kernel/locking/lockdep.c:3158 [inline] check_prevs_add kernel/locking/lockdep.c:3277 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3901 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 ocfs2_nfs_sync_lock+0x109/0x260 fs/ocfs2/dlmglue.c:2876 ocfs2_delete_inode fs/ocfs2/inode.c:1030 [inline] ocfs2_evict_inode+0x3e5/0x4680 fs/ocfs2/inode.c:1216 evict+0x4e8/0x9b0 fs/inode.c:731 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:615 shrink_kill+0xa9/0x2c0 fs/dcache.c:1060 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1087 prune_dcache_sb+0x10f/0x180 fs/dcache.c:1168 super_cache_scan+0x34f/0x4b0 fs/super.c:221 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1093/0x14d0 mm/shrinker.c:662 shrink_one+0x43b/0x850 mm/vmscan.c:4795 shrink_many mm/vmscan.c:4856 [inline] lru_gen_shrink_node mm/vmscan.c:4934 [inline] shrink_node+0x3799/0x3de0 mm/vmscan.c:5914 kswapd_shrink_node mm/vmscan.c:6742 [inline] balance_pgdat mm/vmscan.c:6934 [inline] kswapd+0x1cbc/0x3720 mm/vmscan.c:7203 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Chain exists of: &osb->nfs_sync_rwlock --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> fs_reclaim Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); lock(fs_reclaim); rlock(&osb->nfs_sync_rwlock); *** DEADLOCK *** 2 locks held by kswapd0/78: #0: ffffffff8ea30460 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat mm/vmscan.c:6821 [inline] #0: ffffffff8ea30460 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0xbf1/0x3720 mm/vmscan.c:7203 #1: ffff88804c7c40e0 (&type->s_umount_key#48){.+.+}-{3:3}, at: super_trylock_shared fs/super.c:562 [inline] #1: ffff88804c7c40e0 (&type->s_umount_key#48){.+.+}-{3:3}, at: super_cache_scan+0x94/0x4b0 fs/super.c:196 stack backtrace: CPU: 0 UID: 0 PID: 78 Comm: kswapd0 Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2203 check_prev_add kernel/locking/lockdep.c:3158 [inline] check_prevs_add kernel/locking/lockdep.c:3277 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3901 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5199 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 ocfs2_nfs_sync_lock+0x109/0x260 fs/ocfs2/dlmglue.c:2876 ocfs2_delete_inode fs/ocfs2/inode.c:1030 [inline] ocfs2_evict_inode+0x3e5/0x4680 fs/ocfs2/inode.c:1216 evict+0x4e8/0x9b0 fs/inode.c:731 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:615 shrink_kill+0xa9/0x2c0 fs/dcache.c:1060 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1087 prune_dcache_sb+0x10f/0x180 fs/dcache.c:1168 super_cache_scan+0x34f/0x4b0 fs/super.c:221 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1093/0x14d0 mm/shrinker.c:662 shrink_one+0x43b/0x850 mm/vmscan.c:4795 shrink_many mm/vmscan.c:4856 [inline] lru_gen_shrink_node mm/vmscan.c:4934 [inline] shrink_node+0x3799/0x3de0 mm/vmscan.c:5914 kswapd_shrink_node mm/vmscan.c:6742 [inline] balance_pgdat mm/vmscan.c:6934 [inline] kswapd+0x1cbc/0x3720 mm/vmscan.c:7203 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2024/09/18 08:11 | upstream | 2f27fce67173 | c673ca06 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock | |||
2024/09/11 07:38 | upstream | 8d8d276ba2fb | 8ab55d0e | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock | |||
2024/09/11 05:00 | upstream | 8d8d276ba2fb | 8ab55d0e | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock | |||
2024/09/09 10:29 | upstream | da3ea35007d0 | 9750182a | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock | |||
2024/09/05 16:03 | upstream | c763c4339688 | 36ae3a26 | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock | |||
2024/08/29 01:56 | upstream | a18093afa393 | ef3de9e8 | .config | console log | report | syz / log | [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock | ||
2024/08/27 09:38 | upstream | 3e9bff3bbe13 | 9aee4e0b | .config | console log | report | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-snapshot-upstream-root | possible deadlock in ocfs2_nfs_sync_lock |