REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): using 3.5.x disk format REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 5.15.117-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor260/4188 is trying to acquire lock: ffff8881423d6090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27 but task is already holding lock: ffff888077374028 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] ffff888077374028 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x175/0x2d0 mm/util.c:549 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_lock#2){++++}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __might_fault+0xb4/0x110 mm/memory.c:5311 reiserfs_ioctl+0x11d/0x340 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #0 (&sbi->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xee/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2442 generic_update_time fs/inode.c:1775 [inline] inode_update_time fs/inode.c:1788 [inline] touch_atime+0x3fa/0x680 fs/inode.c:1860 file_accessed include/linux/fs.h:2447 [inline] generic_file_mmap+0xbf/0x120 mm/filemap.c:3392 call_mmap include/linux/fs.h:2108 [inline] mmap_region+0x10e7/0x1670 mm/mmap.c:1791 do_mmap+0x78d/0xe00 mm/mmap.c:1575 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:551 ksys_mmap_pgoff+0x559/0x780 mm/mmap.c:1624 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock#2); lock(&sbi->lock); lock(&mm->mmap_lock#2); lock(&sbi->lock); *** DEADLOCK *** 2 locks held by syz-executor260/4188: #0: ffff888077374028 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] #0: ffff888077374028 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x175/0x2d0 mm/util.c:549 #1: ffff88806d836460 (sb_writers#11){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2447 [inline] #1: ffff88806d836460 (sb_writers#11){.+.+}-{0:0}, at: generic_file_mmap+0xbf/0x120 mm/filemap.c:3392 stack backtrace: CPU: 0 PID: 4188 Comm: syz-executor260 Not tainted 5.15.117-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xee/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x2fd/0xd60 fs/fs-writeback.c:2442 generic_update_time fs/inode.c:1775 [inline] inode_update_time fs/inode.c:1788 [inline] touch_atime+0x3fa/0x680 fs/inode.c:1860 file_accessed include/linux/fs.h:2447 [inline] generic_file_mmap+0xbf/0x120 mm/filemap.c:3392 call_mmap include/linux/fs.h:2108 [inline] mmap_region+0x10e7/0x1670 mm/mmap.c:1791 do_mmap+0x78d/0xe00 mm/mmap.c:1575 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:551 ksys_mmap_pgoff+0x559/0x780 mm/mmap.c:1624 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f1410c00509 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 16 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd0cf1e548 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1410c00509 RDX: 0000000000800001 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 00007ffd0cf1e578 R13: 00007ffd0cf1e5d0 R14: 00007ffd0cf1e590 R15: 0000000000000141