XFS (loop2): Ending clean mount XFS (loop2): Quotacheck needed: Please wait. XFS (loop2): Quotacheck: Done. ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc2-next-20240604-syzkaller #0 Tainted: G W ------------------------------------------------------ syz-executor.2/10022 is trying to acquire lock: ffffffff8e42c540 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:334 [inline] ffffffff8e42c540 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:3891 [inline] ffffffff8e42c540 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3981 [inline] ffffffff8e42c540 (fs_reclaim){+.+.}-{0:0}, at: __do_kmalloc_node mm/slub.c:4121 [inline] ffffffff8e42c540 (fs_reclaim){+.+.}-{0:0}, at: __kmalloc_noprof+0xa9/0x400 mm/slub.c:4135 but task is already holding lock: ffff88806d5db758 (&xfs_nondir_ilock_class#3){++++}-{3:3}, at: xfs_ilock_attr_map_shared+0x8c/0xc0 fs/xfs/xfs_inode.c:127 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&xfs_nondir_ilock_class#3){++++}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817 down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1695 xfs_reclaim_inode fs/xfs/xfs_icache.c:943 [inline] xfs_icwalk_process_inode fs/xfs/xfs_icache.c:1629 [inline] xfs_icwalk_ag+0x120e/0x1ad0 fs/xfs/xfs_icache.c:1711 xfs_icwalk fs/xfs/xfs_icache.c:1760 [inline] xfs_reclaim_inodes_nr+0x257/0x360 fs/xfs/xfs_icache.c:1009 super_cache_scan+0x40f/0x4b0 fs/super.c:227 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1090/0x14c0 mm/shrinker.c:662 shrink_one+0x450/0x880 mm/vmscan.c:4806 shrink_many mm/vmscan.c:4867 [inline] lru_gen_shrink_node mm/vmscan.c:4967 [inline] shrink_node+0x3975/0x4160 mm/vmscan.c:5947 kswapd_shrink_node mm/vmscan.c:6774 [inline] balance_pgdat mm/vmscan.c:6965 [inline] kswapd+0x1882/0x3710 mm/vmscan.c:7234 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 -> #0 (fs_reclaim){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3159 [inline] check_prevs_add kernel/locking/lockdep.c:3278 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3902 __lock_acquire+0x1359/0x2000 kernel/locking/lockdep.c:5194 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817 __fs_reclaim_acquire mm/page_alloc.c:3838 [inline] fs_reclaim_acquire+0x88/0x140 mm/page_alloc.c:3852 might_alloc include/linux/sched/mm.h:334 [inline] slab_pre_alloc_hook mm/slub.c:3891 [inline] slab_alloc_node mm/slub.c:3981 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0xa9/0x400 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] xfs_attr_shortform_list+0x753/0x1900 fs/xfs/xfs_attr_list.c:117 xfs_attr_list+0x1d0/0x270 fs/xfs/xfs_attr_list.c:595 xfs_vn_listxattr+0x1d2/0x2c0 fs/xfs/xfs_xattr.c:324 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x107/0x290 fs/xattr.c:904 __do_sys_flistxattr fs/xattr.c:973 [inline] __se_sys_flistxattr fs/xattr.c:965 [inline] __x64_sys_flistxattr+0x139/0x1b0 fs/xattr.c:965 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&xfs_nondir_ilock_class#3); lock(fs_reclaim); lock(&xfs_nondir_ilock_class#3); lock(fs_reclaim); *** DEADLOCK *** 1 lock held by syz-executor.2/10022: #0: ffff88806d5db758 (&xfs_nondir_ilock_class#3){++++}-{3:3}, at: xfs_ilock_attr_map_shared+0x8c/0xc0 fs/xfs/xfs_inode.c:127 stack backtrace: CPU: 0 PID: 10022 Comm: syz-executor.2 Tainted: G W 6.10.0-rc2-next-20240604-syzkaller #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:91 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2075 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2204 check_prev_add kernel/locking/lockdep.c:3159 [inline] check_prevs_add kernel/locking/lockdep.c:3278 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3902 __lock_acquire+0x1359/0x2000 kernel/locking/lockdep.c:5194 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817 __fs_reclaim_acquire mm/page_alloc.c:3838 [inline] fs_reclaim_acquire+0x88/0x140 mm/page_alloc.c:3852 might_alloc include/linux/sched/mm.h:334 [inline] slab_pre_alloc_hook mm/slub.c:3891 [inline] slab_alloc_node mm/slub.c:3981 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0xa9/0x400 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] xfs_attr_shortform_list+0x753/0x1900 fs/xfs/xfs_attr_list.c:117 xfs_attr_list+0x1d0/0x270 fs/xfs/xfs_attr_list.c:595 xfs_vn_listxattr+0x1d2/0x2c0 fs/xfs/xfs_xattr.c:324 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x107/0x290 fs/xattr.c:904 __do_sys_flistxattr fs/xattr.c:973 [inline] __se_sys_flistxattr fs/xattr.c:965 [inline] __x64_sys_flistxattr+0x139/0x1b0 fs/xattr.c:965 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 RIP: 0033:0x7f0fe367cf69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0fe43fa0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c4 RAX: ffffffffffffffda RBX: 00007f0fe37b3fa0 RCX: 00007f0fe367cf69 RDX: 0000000000000011 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f0fe36da706 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0fe37b3fa0 R15: 00007ffda9cf8ce8