| Title | Replies (including bot) | Last reply |
|---|---|---|
| [syzbot] [jfs?] possible deadlock in diFree | 0 (1) | 2024/04/22 15:24 |
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| Title | Replies (including bot) | Last reply |
|---|---|---|
| [syzbot] [jfs?] possible deadlock in diFree | 0 (1) | 2024/04/22 15:24 |
======================================================
WARNING: possible circular locking dependency detected
6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0 Not tainted
------------------------------------------------------
kswapd0/110 is trying to acquire lock:
ffff888053e88920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886
but task is already holding lock:
ffffffff8d937200 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x166/0x1a10 mm/vmscan.c:6782
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (fs_reclaim){+.+.}-{0:0}:
__fs_reclaim_acquire mm/page_alloc.c:3698 [inline]
fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712
might_alloc include/linux/sched/mm.h:312 [inline]
prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4346
__alloc_pages+0x194/0x2460 mm/page_alloc.c:4564
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
__kmalloc_large_node+0x7f/0x1a0 mm/slub.c:3911
kmalloc_large+0x1c/0x70 mm/slub.c:3928
kmalloc include/linux/slab.h:625 [inline]
diMount+0x29/0x8d0 fs/jfs/jfs_imap.c:105
jfs_mount_rw+0x238/0x700 fs/jfs/jfs_mount.c:240
jfs_remount+0x51f/0x650 fs/jfs/super.c:454
legacy_reconfigure+0x119/0x180 fs/fs_context.c:685
reconfigure_super+0x44f/0xb20 fs/super.c:1071
vfs_cmd_reconfigure fs/fsopen.c:267 [inline]
vfs_fsconfig_locked fs/fsopen.c:296 [inline]
__do_sys_fsconfig+0x991/0xb90 fs/fsopen.c:476
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #1 (&jfs_ip->rdwrlock/1){++++}-{3:3}:
down_read_nested+0x9e/0x330 kernel/locking/rwsem.c:1651
diAllocExt fs/jfs/jfs_imap.c:1914 [inline]
diAllocAG+0x235/0x2300 fs/jfs/jfs_imap.c:1666
diAlloc+0x8f7/0x1a70 fs/jfs/jfs_imap.c:1587
ialloc+0x84/0x9e0 fs/jfs/jfs_inode.c:56
jfs_mkdir+0x244/0xb30 fs/jfs/namei.c:225
vfs_mkdir+0x57d/0x820 fs/namei.c:4123
do_mkdirat+0x301/0x3a0 fs/namei.c:4146
__do_sys_mkdir fs/namei.c:4166 [inline]
__se_sys_mkdir fs/namei.c:4164 [inline]
__ia32_sys_mkdir+0xf0/0x140 fs/namei.c:4164
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
-> #0 (&(imap->im_aglock[index])){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__mutex_lock_common kernel/locking/mutex.c:608 [inline]
__mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752
diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886
jfs_evict_inode+0x3d4/0x4b0 fs/jfs/inode.c:156
evict+0x2ed/0x6c0 fs/inode.c:667
iput_final fs/inode.c:1741 [inline]
iput.part.0+0x5a8/0x7f0 fs/inode.c:1767
iput+0x5c/0x80 fs/inode.c:1757
dentry_unlink_inode+0x295/0x440 fs/dcache.c:400
__dentry_kill+0x1d0/0x600 fs/dcache.c:603
shrink_kill fs/dcache.c:1048 [inline]
shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075
prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156
super_cache_scan+0x32a/0x550 fs/super.c:221
do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
shrink_slab_memcg mm/shrinker.c:548 [inline]
shrink_slab+0xa87/0x1310 mm/shrinker.c:626
shrink_one+0x493/0x7c0 mm/vmscan.c:4774
shrink_many mm/vmscan.c:4835 [inline]
lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935
shrink_node mm/vmscan.c:5894 [inline]
kswapd_shrink_node mm/vmscan.c:6704 [inline]
balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895
kswapd+0x5ea/0xbf0 mm/vmscan.c:7164
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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:
&(imap->im_aglock[index]) --> &jfs_ip->rdwrlock/1 --> fs_reclaim
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(fs_reclaim);
lock(&jfs_ip->rdwrlock/1);
lock(fs_reclaim);
lock(&(imap->im_aglock[index]));
*** DEADLOCK ***
2 locks held by kswapd0/110:
#0: ffffffff8d937200 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x166/0x1a10 mm/vmscan.c:6782
#1: ffff8880567200e0 (&type->s_umount_key#68){++++}-{3:3}, at: super_trylock_shared fs/super.c:561 [inline]
#1: ffff8880567200e0 (&type->s_umount_key#68){++++}-{3:3}, at: super_cache_scan+0x96/0x550 fs/super.c:196
stack backtrace:
CPU: 0 PID: 110 Comm: kswapd0 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__mutex_lock_common kernel/locking/mutex.c:608 [inline]
__mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752
diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886
jfs_evict_inode+0x3d4/0x4b0 fs/jfs/inode.c:156
evict+0x2ed/0x6c0 fs/inode.c:667
iput_final fs/inode.c:1741 [inline]
iput.part.0+0x5a8/0x7f0 fs/inode.c:1767
iput+0x5c/0x80 fs/inode.c:1757
dentry_unlink_inode+0x295/0x440 fs/dcache.c:400
__dentry_kill+0x1d0/0x600 fs/dcache.c:603
shrink_kill fs/dcache.c:1048 [inline]
shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075
prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156
super_cache_scan+0x32a/0x550 fs/super.c:221
do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
shrink_slab_memcg mm/shrinker.c:548 [inline]
shrink_slab+0xa87/0x1310 mm/shrinker.c:626
shrink_one+0x493/0x7c0 mm/vmscan.c:4774
shrink_many mm/vmscan.c:4835 [inline]
lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935
shrink_node mm/vmscan.c:5894 [inline]
kswapd_shrink_node mm/vmscan.c:6704 [inline]
balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895
kswapd+0x5ea/0xbf0 mm/vmscan.c:7164
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024/04/30 06:22 | upstream | b947cc5bf6d7 | f10afd69 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream-386 | possible deadlock in diFree | ||
| 2024/04/18 15:17 | upstream | 8cd26fd90c1a | af24b050 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream-386 | possible deadlock in diFree |