EXT4-fs: Ignoring removed nomblk_io_submit option EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ====================================================== WARNING: possible circular locking dependency detected 6.9.0-syzkaller-08410-gff2632d7d08e #0 Not tainted ------------------------------------------------------ syz-executor.0/19426 is trying to acquire lock: ffffffff8dd38f00 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:312 [inline] ffffffff8dd38f00 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:3819 [inline] ffffffff8dd38f00 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3900 [inline] ffffffff8dd38f00 (fs_reclaim){+.+.}-{0:0}, at: __do_kmalloc_node mm/slub.c:4038 [inline] ffffffff8dd38f00 (fs_reclaim){+.+.}-{0:0}, at: __kmalloc_node+0xbb/0x480 mm/slub.c:4046 but task is already holding lock: ffff888020ed8ac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ffff888020ed8ac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x156/0x16d0 fs/ext4/xattr.c:2358 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->xattr_sem){++++}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_xattr_set_handle+0x156/0x16d0 fs/ext4/xattr.c:2358 __ext4_set_acl+0x366/0x5d0 fs/ext4/acl.c:217 ext4_set_acl+0x2a0/0x5a0 fs/ext4/acl.c:259 set_posix_acl+0x25c/0x320 fs/posix_acl.c:955 vfs_remove_acl+0x2d1/0x630 fs/posix_acl.c:1242 ovl_do_remove_acl fs/overlayfs/overlayfs.h:349 [inline] ovl_workdir_create+0x4a5/0x820 fs/overlayfs/super.c:340 ovl_make_workdir fs/overlayfs/super.c:656 [inline] ovl_get_workdir fs/overlayfs/super.c:814 [inline] ovl_fill_super+0xe60/0x6960 fs/overlayfs/super.c:1382 vfs_get_super fs/super.c:1268 [inline] get_tree_nodev+0xda/0x190 fs/super.c:1287 vfs_get_tree+0x8f/0x380 fs/super.c:1779 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e1/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 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 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1101/0x15e0 fs/jbd2/transaction.c:463 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:520 __ext4_journal_start_sb+0x358/0x660 fs/ext4/ext4_jbd2.c:112 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0xa1/0x130 fs/ext4/inode.c:5939 __mark_inode_dirty+0x1f0/0xe70 fs/fs-writeback.c:2486 mark_inode_dirty_sync include/linux/fs.h:2426 [inline] iput.part.0+0x5b/0x7f0 fs/inode.c:1764 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:389 ret_from_fork+0x45/0x80 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: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 __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] slab_pre_alloc_hook mm/slub.c:3819 [inline] slab_alloc_node mm/slub.c:3900 [inline] __do_kmalloc_node mm/slub.c:4038 [inline] __kmalloc_node+0xbb/0x480 mm/slub.c:4046 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0x9d/0x1a0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] ext4_xattr_inode_cache_find fs/ext4/xattr.c:1535 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1581 [inline] ext4_xattr_set_entry+0xdc3/0x3b20 fs/ext4/xattr.c:1718 ext4_xattr_block_set+0xd07/0x3080 fs/ext4/xattr.c:2037 ext4_xattr_set_handle+0xf24/0x16d0 fs/ext4/xattr.c:2443 ext4_xattr_set+0x149/0x380 fs/ext4/xattr.c:2545 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x146/0x350 fs/xattr.c:321 do_setxattr+0x146/0x170 fs/xattr.c:629 setxattr+0x15d/0x180 fs/xattr.c:652 path_setxattr+0x179/0x1e0 fs/xattr.c:671 __do_sys_setxattr fs/xattr.c:687 [inline] __se_sys_setxattr fs/xattr.c:683 [inline] __ia32_sys_setxattr+0xc0/0x160 fs/xattr.c:683 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 other info that might help us debug this: Chain exists of: fs_reclaim --> jbd2_handle --> &ei->xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->xattr_sem); lock(jbd2_handle); lock(&ei->xattr_sem); lock(fs_reclaim); *** DEADLOCK *** 3 locks held by syz-executor.0/19426: #0: ffff888068a18420 (sb_writers#4){.+.+}-{0:0}, at: path_setxattr+0xc3/0x1e0 fs/xattr.c:669 #1: ffff888020ed8e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff888020ed8e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_setxattr+0x123/0x350 fs/xattr.c:320 #2: ffff888020ed8ac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff888020ed8ac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x156/0x16d0 fs/ext4/xattr.c:2358 stack backtrace: CPU: 1 PID: 19426 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-08410-gff2632d7d08e #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __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 __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] slab_pre_alloc_hook mm/slub.c:3819 [inline] slab_alloc_node mm/slub.c:3900 [inline] __do_kmalloc_node mm/slub.c:4038 [inline] __kmalloc_node+0xbb/0x480 mm/slub.c:4046 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0x9d/0x1a0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] ext4_xattr_inode_cache_find fs/ext4/xattr.c:1535 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1581 [inline] ext4_xattr_set_entry+0xdc3/0x3b20 fs/ext4/xattr.c:1718 ext4_xattr_block_set+0xd07/0x3080 fs/ext4/xattr.c:2037 ext4_xattr_set_handle+0xf24/0x16d0 fs/ext4/xattr.c:2443 ext4_xattr_set+0x149/0x380 fs/ext4/xattr.c:2545 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x146/0x350 fs/xattr.c:321 do_setxattr+0x146/0x170 fs/xattr.c:629 setxattr+0x15d/0x180 fs/xattr.c:652 path_setxattr+0x179/0x1e0 fs/xattr.c:671 __do_sys_setxattr fs/xattr.c:687 [inline] __se_sys_setxattr fs/xattr.c:683 [inline] __ia32_sys_setxattr+0xc0/0x160 fs/xattr.c:683 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 RIP: 0023:0xf729c579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e8e5ac EFLAGS: 00000292 ORIG_RAX: 00000000000000e2 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00000000200001c0 RDX: 0000000020001400 RSI: 0000000000000835 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi