Hello, syzbot found the following issue on: HEAD commit: e0cce98fe279 Merge tag 'tpmdd-next-6.10-rc2' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10473b3a980000 kernel config: https://syzkaller.appspot.com/x/.config?x=733cc7a95171d8e7 dashboard link: https://syzkaller.appspot.com/bug?extid=8bf80f09a0a9767b4308 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-e0cce98f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/eb24795b031d/vmlinux-e0cce98f.xz kernel image: https://storage.googleapis.com/syzbot-assets/bcfa9241b1bb/bzImage-e0cce98f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8bf80f09a0a9767b4308@xxxxxxxxxxxxxxxxxxxxxxxxx ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 Not tainted ------------------------------------------------------ syz-executor.0/6609 is trying to acquire lock: ffff88802a2450c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ffff88802a2450c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_inline_data_truncate+0x1af/0xc80 fs/ext4/inline.c:1915 but task is already holding lock: ffff888012ccc610 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x6c0 fs/inode.c:667 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_internal){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1655 [inline] sb_start_intwrite include/linux/fs.h:1838 [inline] ext4_evict_inode+0xd7b/0x17d0 fs/ext4/inode.c:212 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+0x295/0x480 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:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 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 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:3783 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3797 might_alloc include/linux/sched/mm.h:334 [inline] slab_pre_alloc_hook mm/slub.c:3890 [inline] slab_alloc_node mm/slub.c:3980 [inline] __do_kmalloc_node mm/slub.c:4120 [inline] __kmalloc_node_noprof+0xbb/0x450 mm/slub.c:4128 kmalloc_node_noprof include/linux/slab.h:681 [inline] kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:634 ext4_xattr_inode_cache_find fs/ext4/xattr.c:1535 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1581 [inline] ext4_xattr_inode_lookup_create+0x4e8/0x1910 fs/ext4/xattr.c:1568 ext4_xattr_block_set+0x77a/0x3090 fs/ext4/xattr.c:1910 ext4_xattr_move_to_block fs/ext4/xattr.c:2663 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2738 [inline] ext4_expand_extra_isize_ea+0xf57/0x1990 fs/ext4/xattr.c:2830 __ext4_expand_extra_isize+0x322/0x450 fs/ext4/inode.c:5782 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5825 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5903 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:5935 __mark_inode_dirty+0x1f0/0xe70 fs/fs-writeback.c:2486 generic_update_time+0xcf/0xf0 fs/inode.c:1907 inode_update_time fs/inode.c:1920 [inline] touch_atime+0x4ee/0x5d0 fs/inode.c:1992 file_accessed include/linux/fs.h:2458 [inline] filemap_read+0xb2b/0xd10 mm/filemap.c:2693 generic_file_read_iter+0x350/0x460 mm/filemap.c:2806 ext4_file_read_iter+0x1dc/0x6c0 fs/ext4/file.c:147 __kernel_read+0x3ec/0xb50 fs/read_write.c:434 kernel_read+0x55/0x70 fs/read_write.c:452 prepare_binprm fs/exec.c:1732 [inline] search_binary_handler fs/exec.c:1781 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve fs/exec.c:1891 [inline] bprm_execve+0x61e/0x19b0 fs/exec.c:1867 do_execveat_common.isra.0+0x5cb/0x750 fs/exec.c:1998 compat_do_execve fs/exec.c:2099 [inline] __do_compat_sys_execve fs/exec.c:2167 [inline] __se_compat_sys_execve fs/exec.c:2163 [inline] __ia32_compat_sys_execve+0x90/0xc0 fs/exec.c:2163 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 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 (&ei->xattr_sem){++++}-{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 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_inline_data_truncate+0x1af/0xc80 fs/ext4/inline.c:1915 ext4_truncate+0x990/0x1400 fs/ext4/inode.c:4095 ext4_evict_inode+0x7ae/0x17d0 fs/ext4/inode.c:258 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 ext4_orphan_cleanup+0x742/0x1210 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5553 [inline] ext4_fill_super+0x8333/0xacf0 fs/ext4/super.c:5676 get_tree_bdev+0x36f/0x610 fs/super.c:1615 vfs_get_tree+0x8f/0x380 fs/super.c:1780 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+0x73/0x120 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: &ei->xattr_sem --> fs_reclaim --> sb_internal Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_internal); lock(fs_reclaim); lock(sb_internal); lock(&ei->xattr_sem); *** DEADLOCK *** 2 locks held by syz-executor.0/6609: #0: ffff888012ccc0e0 (&type->s_umount_key#29/1){+.+.}-{3:3}, at: alloc_super+0x23d/0xbd0 fs/super.c:344 #1: ffff888012ccc610 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x6c0 fs/inode.c:667 stack backtrace: CPU: 0 PID: 6609 Comm: syz-executor.0 Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #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 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_inline_data_truncate+0x1af/0xc80 fs/ext4/inline.c:1915 ext4_truncate+0x990/0x1400 fs/ext4/inode.c:4095 ext4_evict_inode+0x7ae/0x17d0 fs/ext4/inode.c:258 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 ext4_orphan_cleanup+0x742/0x1210 fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5553 [inline] ext4_fill_super+0x8333/0xacf0 fs/ext4/super.c:5676 get_tree_bdev+0x36f/0x610 fs/super.c:1615 vfs_get_tree+0x8f/0x380 fs/super.c:1780 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+0x73/0x120 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: 0023:0xf7329579 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:00000000f5efa400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00000000f5efa460 RCX: 0000000020000000 RDX: 0000000020000080 RSI: 000000000000010e RDI: 00000000f5efa4a0 RBP: 00000000f5efa460 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> EXT4-fs (loop0): 1 orphan inode deleted EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ---------------- 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 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
