Hello, syzbot found the following issue on: HEAD commit: 0cdb3579f1ee Add linux-next specific files for 20221104 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1608948e880000 kernel config: https://syzkaller.appspot.com/x/.config?x=f8b29628d1d8538b dashboard link: https://syzkaller.appspot.com/bug?extid=79c303ad05f4041e0dad compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12f2b215880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14d3c525880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3d0fa4b872bd/disk-0cdb3579.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/797f855f0497/vmlinux-0cdb3579.xz kernel image: https://storage.googleapis.com/syzbot-assets/2c5c130d649d/bzImage-0cdb3579.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/41524a2c0287/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+79c303ad05f4041e0dad@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using rupasov hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc3-next-20221104-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor418/5242 is trying to acquire lock: ffff8880289b2460 (sb_writers#9){.+.+}-{0:0}, at: reiserfs_ioctl+0x19e/0x320 fs/reiserfs/ioctl.c:103 but task is already holding lock: ffff888016eec090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747 reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x171/0x490 fs/reiserfs/namei.c:364 __lookup_slow+0x24c/0x460 fs/namei.c:1685 lookup_one_len+0x16a/0x1a0 fs/namei.c:2711 reiserfs_lookup_privroot+0x92/0x280 fs/reiserfs/xattr.c:973 reiserfs_fill_super+0x20e5/0x2e90 fs/reiserfs/super.c:2174 mount_bdev+0x34d/0x410 fs/super.c:1401 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1531 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3696 [inline] __se_sys_mount fs/namespace.c:3673 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3673 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&type->i_mutex_dir_key#6){+.+.}-{3:3}: down_write+0x90/0x220 kernel/locking/rwsem.c:1562 inode_lock include/linux/fs.h:756 [inline] chmod_common+0x14b/0x410 fs/open.c:600 vfs_fchmod fs/open.c:622 [inline] __do_sys_fchmod fs/open.c:631 [inline] __se_sys_fchmod fs/open.c:625 [inline] __x64_sys_fchmod+0x10e/0x190 fs/open.c:625 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (sb_writers#9){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1df/0x630 kernel/locking/lockdep.c:5633 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1792 [inline] sb_start_write include/linux/fs.h:1867 [inline] mnt_want_write_file+0x8e/0x590 fs/namespace.c:552 reiserfs_ioctl+0x19e/0x320 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: sb_writers#9 --> &type->i_mutex_dir_key#6 --> &sbi->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#6); lock(&sbi->lock); lock(sb_writers#9); *** DEADLOCK *** 1 lock held by syz-executor418/5242: #0: ffff888016eec090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 stack backtrace: CPU: 1 PID: 5242 Comm: syz-executor418 Not tainted 6.1.0-rc3-next-20221104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1df/0x630 kernel/locking/lockdep.c:5633 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1792 [inline] sb_start_write include/linux/fs.h:1867 [inline] mnt_want_write_file+0x8e/0x590 fs/namespace.c:552 reiserfs_ioctl+0x19e/0x320 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f157998c889 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe2dd23488 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f157998c889 RDX: 0000000000000000 RSI: 0000000040087602 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f15799faec0 R09: 00007f15799faec0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe2dd234b0 R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 </TASK> --- This report is generated by a bot. 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