REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/6374 is trying to acquire lock: 0000000087b26391 (&mm->mmap_sem){++++}, at: __might_fault+0xef/0x1d0 mm/memory.c:4771 but task is already holding lock: 00000000b656685e (&sbi->lock){+.+.}, 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){+.+.}: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 reiserfs_dirty_inode+0xce/0x250 fs/reiserfs/super.c:710 __mark_inode_dirty+0x16b/0x1140 fs/fs-writeback.c:2164 generic_update_time+0x21c/0x370 fs/inode.c:1659 update_time fs/inode.c:1675 [inline] file_update_time+0x316/0x500 fs/inode.c:1890 filemap_page_mkwrite+0x123/0x2f0 mm/filemap.c:2726 do_page_mkwrite+0xd4/0x410 mm/memory.c:2486 wp_page_shared mm/memory.c:2794 [inline] do_wp_page+0x980/0x2210 mm/memory.c:2894 handle_pte_fault mm/memory.c:4191 [inline] __handle_mm_fault+0x258b/0x41c0 mm/memory.c:4299 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 -> #1 (sb_pagefaults#2){.+.+}: sb_start_pagefault include/linux/fs.h:1608 [inline] filemap_page_mkwrite+0xd7/0x2f0 mm/filemap.c:2725 do_page_mkwrite+0xd4/0x410 mm/memory.c:2486 wp_page_shared mm/memory.c:2794 [inline] do_wp_page+0x980/0x2210 mm/memory.c:2894 handle_pte_fault mm/memory.c:4191 [inline] __handle_mm_fault+0x258b/0x41c0 mm/memory.c:4299 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 -> #0 (&mm->mmap_sem){++++}: __might_fault mm/memory.c:4772 [inline] __might_fault+0x152/0x1d0 mm/memory.c:4757 reiserfs_ioctl+0xbb/0x9a0 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: F2FS-fs (loop2): invalid crc value Chain exists of: &mm->mmap_sem --> sb_pagefaults#2 --> &sbi->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(sb_pagefaults#2); lock(&sbi->lock); lock(&mm->mmap_sem); *** DEADLOCK *** 1 lock held by syz-executor.0/6374: #0: 00000000b656685e (&sbi->lock){+.+.}, at: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 stack backtrace: CPU: 0 PID: 6374 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __might_fault mm/memory.c:4772 [inline] __might_fault+0x152/0x1d0 mm/memory.c:4757 reiserfs_ioctl+0xbb/0x9a0 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5877f040f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f5876476168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5878023f80 RCX: 00007f5877f040f9 RDX: 0000000020000140 RSI: 0000000080087601 RDI: 000000000000000a RBP: 00007f5877f5fae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9534275f R14: 00007f5876476300 R15: 0000000000022000 REISERFS (device loop4): checking transaction log (loop4) F2FS-fs (loop2): Mounted with checkpoint version = 48b305e4 REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal REISERFS (device loop0): using ordered data mode reiserfs: using flush barriers REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. caif:caif_disconnect_client(): nothing to disconnect REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal REISERFS (device loop0): using ordered data mode REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal reiserfs: using flush barriers REISERFS (device loop4): using ordered data mode REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. caif:caif_disconnect_client(): nothing to disconnect REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. caif:caif_disconnect_client(): nothing to disconnect F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): Mounted with checkpoint version = 48b305e4 REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. F2FS-fs (loop2): invalid crc value F2FS-fs (loop2): Mounted with checkpoint version = 48b305e4