------------[ cut here ]------------ WARNING: CPU: 1 PID: 5186 at fs/ext4/inode.c:5325 ext4_write_inode+0x337/0x590 fs/ext4/inode.c:5325 Modules linked in: CPU: 1 PID: 5186 Comm: syz-executor.1 Not tainted 6.3.0-rc3-syzkaller-00286-ge76db6e50c85 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:ext4_write_inode+0x337/0x590 fs/ext4/inode.c:5325 Code: b6 04 02 84 c0 74 08 3c 03 0f 8e 3d 02 00 00 8b b5 b0 06 00 00 4c 89 f7 e8 86 95 12 00 41 89 c4 e9 ed fd ff ff e8 19 5d 59 ff <0f> 0b 45 31 e4 e9 de fd ff ff e8 0a 5d 59 ff 48 89 ef 48 8d 74 24 RSP: 0018:ffffc90002ef7378 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff920005dee6f RCX: 0000000000000000 RDX: ffff888015e49d40 RSI: ffffffff822987e7 RDI: 0000000000000005 RBP: ffff88801c7652f0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000800 R11: 0000000000000000 R12: 0000000000000800 R13: ffffc90002ef74f8 R14: dffffc0000000000 R15: ffff88801c765318 FS: 0000000000000000(0000) GS:ffff88802ca80000(0063) knlGS:0000000056a93380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000ff856764 CR3: 00000000634ea000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_inode fs/fs-writeback.c:1453 [inline] __writeback_single_inode+0x9f8/0xdc0 fs/fs-writeback.c:1665 writeback_single_inode+0x2ad/0x590 fs/fs-writeback.c:1721 write_inode_now+0x16e/0x1e0 fs/fs-writeback.c:2757 iput_final fs/inode.c:1735 [inline] iput.part.0+0x408/0x740 fs/inode.c:1774 iput+0x5c/0x80 fs/inode.c:1764 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 __dentry_kill+0x3c0/0x640 fs/dcache.c:607 shrink_dentry_list+0x12c/0x4f0 fs/dcache.c:1201 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1282 super_cache_scan+0x33a/0x590 fs/super.c:104 do_shrink_slab+0x428/0xaa0 mm/vmscan.c:853 shrink_slab_memcg mm/vmscan.c:922 [inline] shrink_slab+0x388/0x660 mm/vmscan.c:1001 shrink_node_memcgs mm/vmscan.c:6439 [inline] shrink_node+0x7fb/0x35f0 mm/vmscan.c:6473 shrink_zones mm/vmscan.c:6711 [inline] do_try_to_free_pages+0x3b4/0x17b0 mm/vmscan.c:6773 try_to_free_mem_cgroup_pages+0x368/0x840 mm/vmscan.c:7088 reclaim_high.constprop.0+0x182/0x230 mm/memcontrol.c:2403 mem_cgroup_handle_over_high+0x190/0x520 mm/memcontrol.c:2588 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x18c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7fb1579 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:00000000ff856700 EFLAGS: 00000287 ORIG_RAX: 0000000000000127 RAX: 0000000000000003 RBX: 00000000ffffff9c RCX: 00000000ff857874 RDX: 0000000000098800 RSI: 0000000000000000 RDI: 00000000f72a2535 RBP: 0000000000000bb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 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 retq 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