REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 6.4.0-rc1-syzkaller-00133-g9a48d6046722 #0 Not tainted ------------------------------------------------------ syz-executor330/5091 is trying to acquire lock: ffff888077e05090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 but task is already holding lock: ffff88802ce3ed68 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline] ffff88802ce3ed68 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x17c/0x410 mm/util.c:541 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 __might_fault+0xba/0x120 mm/memory.c:5732 reiserfs_ioctl+0x121/0x340 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&sbi->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3842 __lock_acquire+0x1295/0x2000 kernel/locking/lockdep.c:5074 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 __mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xf2/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x305/0xd90 fs/fs-writeback.c:2424 generic_update_time fs/inode.c:1859 [inline] inode_update_time fs/inode.c:1872 [inline] touch_atime+0x3fe/0x680 fs/inode.c:1944 file_accessed include/linux/fs.h:2198 [inline] generic_file_mmap+0xc0/0x120 mm/filemap.c:3600 call_mmap include/linux/fs.h:1873 [inline] mmap_region+0xe65/0x2250 mm/mmap.c:2652 do_mmap+0x8c9/0xf70 mm/mmap.c:1394 vm_mmap_pgoff+0x1db/0x410 mm/util.c:543 ksys_mmap_pgoff+0x4f9/0x6d0 mm/mmap.c:1440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_lock); lock(&sbi->lock); lock(&mm->mmap_lock); lock(&sbi->lock); *** DEADLOCK *** 2 locks held by syz-executor330/5091: #0: ffff88802ce3ed68 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline] #0: ffff88802ce3ed68 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x17c/0x410 mm/util.c:541 #1: ffff88807d14c460 (sb_writers#10){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2198 [inline] #1: ffff88807d14c460 (sb_writers#10){.+.+}-{0:0}, at: generic_file_mmap+0xc0/0x120 mm/filemap.c:3600 stack backtrace: CPU: 1 PID: 5091 Comm: syz-executor330 Not tainted 6.4.0-rc1-syzkaller-00133-g9a48d6046722 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3842 __lock_acquire+0x1295/0x2000 kernel/locking/lockdep.c:5074 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 __mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xf2/0x240 fs/reiserfs/super.c:704 __mark_inode_dirty+0x305/0xd90 fs/fs-writeback.c:2424 generic_update_time fs/inode.c:1859 [inline] inode_update_time fs/inode.c:1872 [inline] touch_atime+0x3fe/0x680 fs/inode.c:1944 file_accessed include/linux/fs.h:2198 [inline] generic_file_mmap+0xc0/0x120 mm/filemap.c:3600 call_mmap include/linux/fs.h:1873 [inline] mmap_region+0xe65/0x2250 mm/mmap.c:2652 do_mmap+0x8c9/0xf70 mm/mmap.c:1394 vm_mmap_pgoff+0x1db/0x410 mm/util.c:543 ksys_mmap_pgoff+0x4f9/0x6d0 mm/mmap.c:1440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd623795b39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 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:00007fd622f3a1e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fd623822568 RCX: 00007fd623795b39 RDX: 0000000000000001 RSI: 0000000000003000 RDI: 0000000020000000 RBP: 00007fd623822560 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 00007fd62382256c R13: 00007ffeb27210df R14: 00007fd622f3a300 R15: 0000000000022000