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 6.4.0-rc2-syzkaller-gf1fcbaa18b28 #0 Not tainted ------------------------------------------------------ syz-executor351/6281 is trying to acquire lock: ffff0000c763a090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 but task is already holding lock: ffff0000c902ea58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline] ffff0000c902ea58 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x150/0x3b8 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}: __might_fault+0xc4/0x124 mm/memory.c:5732 reiserfs_ioctl+0x10c/0x454 fs/reiserfs/ioctl.c:96 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #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 kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x3310/0x75f0 kernel/locking/lockdep.c:5074 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5691 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xe4/0x204 fs/reiserfs/super.c:704 __mark_inode_dirty+0x2b0/0x10f4 fs/fs-writeback.c:2424 generic_update_time fs/inode.c:1859 [inline] inode_update_time fs/inode.c:1872 [inline] touch_atime+0x5d8/0x8d4 fs/inode.c:1944 file_accessed include/linux/fs.h:2198 [inline] generic_file_mmap+0xb0/0x11c mm/filemap.c:3600 call_mmap include/linux/fs.h:1873 [inline] mmap_region+0xc00/0x1aa4 mm/mmap.c:2652 do_mmap+0xa00/0x1108 mm/mmap.c:1394 vm_mmap_pgoff+0x198/0x3b8 mm/util.c:543 ksys_mmap_pgoff+0x3c8/0x5b0 mm/mmap.c:1440 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 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-executor351/6281: #0: ffff0000c902ea58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline] #0: ffff0000c902ea58 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x150/0x3b8 mm/util.c:541 #1: ffff0000cf7ae460 (sb_writers#8){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2198 [inline] #1: ffff0000cf7ae460 (sb_writers#8){.+.+}-{0:0}, at: generic_file_mmap+0xb0/0x11c mm/filemap.c:3600 stack backtrace: CPU: 0 PID: 6281 Comm: syz-executor351 Not tainted 6.4.0-rc2-syzkaller-gf1fcbaa18b28 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2066 check_noncircular+0x2cc/0x378 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 kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x3310/0x75f0 kernel/locking/lockdep.c:5074 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5691 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xe4/0x204 fs/reiserfs/super.c:704 __mark_inode_dirty+0x2b0/0x10f4 fs/fs-writeback.c:2424 generic_update_time fs/inode.c:1859 [inline] inode_update_time fs/inode.c:1872 [inline] touch_atime+0x5d8/0x8d4 fs/inode.c:1944 file_accessed include/linux/fs.h:2198 [inline] generic_file_mmap+0xb0/0x11c mm/filemap.c:3600 call_mmap include/linux/fs.h:1873 [inline] mmap_region+0xc00/0x1aa4 mm/mmap.c:2652 do_mmap+0xa00/0x1108 mm/mmap.c:1394 vm_mmap_pgoff+0x198/0x3b8 mm/util.c:543 ksys_mmap_pgoff+0x3c8/0x5b0 mm/mmap.c:1440 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591