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-rc7-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/5805 is trying to acquire lock: ffff888020b64090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 fs/reiserfs/lock.c:78 but task is already holding lock: ffff888067a2a5a0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] ffff888067a2a5a0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:226 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (mapping.invalidate_lock#3){.+.+}-{3:3}: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705 down_read+0x47/0x2f0 kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:226 do_sync_mmap_readahead+0x7b6/0x9a0 mm/filemap.c:3193 filemap_fault+0x81b/0x1810 mm/filemap.c:3285 __do_fault+0x136/0x500 mm/memory.c:4176 do_shared_fault mm/memory.c:4585 [inline] do_fault mm/memory.c:4663 [inline] do_pte_missing+0x68b/0x2810 mm/memory.c:3647 handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x16cf/0x2e30 mm/memory.c:5243 do_user_addr_fault arch/x86/mm/fault.c:1440 [inline] handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x7c2/0x900 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:89 reiserfs_ioctl+0x151/0x340 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+0x41/0x90 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:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain+0x166b/0x58f0 kernel/locking/lockdep.c:3847 __lock_acquire+0x1316/0x2070 kernel/locking/lockdep.c:5088 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705 __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_nested+0x5f/0xd0 fs/reiserfs/lock.c:78 reiserfs_cond_resched fs/reiserfs/reiserfs.h:849 [inline] search_by_key+0xab3/0x4b60 fs/reiserfs/stree.c:712 search_for_position_by_key+0x10d/0x1010 fs/reiserfs/stree.c:874 _get_block_create_0+0x303/0x20b0 fs/reiserfs/inode.c:305 reiserfs_get_block+0x39f/0x5130 fs/reiserfs/inode.c:695 do_mpage_readpage+0x911/0x1fa0 fs/mpage.c:234 mpage_readahead+0x454/0x930 fs/mpage.c:382 read_pages+0x183/0x830 mm/readahead.c:161 page_cache_ra_unbounded+0x697/0x7c0 mm/readahead.c:270 do_sync_mmap_readahead+0x7b6/0x9a0 mm/filemap.c:3193 filemap_fault+0x81b/0x1810 mm/filemap.c:3285 __do_fault+0x136/0x500 mm/memory.c:4176 do_shared_fault mm/memory.c:4585 [inline] do_fault mm/memory.c:4663 [inline] do_pte_missing+0x68b/0x2810 mm/memory.c:3647 handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x16cf/0x2e30 mm/memory.c:5243 do_user_addr_fault arch/x86/mm/fault.c:1440 [inline] handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x7c2/0x900 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:89 reiserfs_ioctl+0x151/0x340 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+0x41/0x90 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 ---- ---- rlock(mapping.invalidate_lock#3); lock(&sbi->lock); lock(mapping.invalidate_lock#3); lock(&sbi->lock); *** DEADLOCK *** 1 lock held by syz-executor.0/5805: #0: ffff888067a2a5a0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] #0: ffff888067a2a5a0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:226 stack backtrace: CPU: 0 PID: 5805 Comm: syz-executor.0 Not tainted 6.4.0-rc7-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+0x1e7/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain+0x166b/0x58f0 kernel/locking/lockdep.c:3847 __lock_acquire+0x1316/0x2070 kernel/locking/lockdep.c:5088 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705 __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_nested+0x5f/0xd0 fs/reiserfs/lock.c:78 reiserfs_cond_resched fs/reiserfs/reiserfs.h:849 [inline] search_by_key+0xab3/0x4b60 fs/reiserfs/stree.c:712 search_for_position_by_key+0x10d/0x1010 fs/reiserfs/stree.c:874 _get_block_create_0+0x303/0x20b0 fs/reiserfs/inode.c:305 reiserfs_get_block+0x39f/0x5130 fs/reiserfs/inode.c:695 do_mpage_readpage+0x911/0x1fa0 fs/mpage.c:234 mpage_readahead+0x454/0x930 fs/mpage.c:382 read_pages+0x183/0x830 mm/readahead.c:161 page_cache_ra_unbounded+0x697/0x7c0 mm/readahead.c:270 do_sync_mmap_readahead+0x7b6/0x9a0 mm/filemap.c:3193 filemap_fault+0x81b/0x1810 mm/filemap.c:3285 __do_fault+0x136/0x500 mm/memory.c:4176 do_shared_fault mm/memory.c:4585 [inline] do_fault mm/memory.c:4663 [inline] do_pte_missing+0x68b/0x2810 mm/memory.c:3647 handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x16cf/0x2e30 mm/memory.c:5243 do_user_addr_fault arch/x86/mm/fault.c:1440 [inline] handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x7c2/0x900 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:__put_user_4+0x11/0x20 arch/x86/lib/putuser.S:91 Code: fa 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <89> 01 31 c9 0f 01 ca c3 0f 1f 80 00 00 00 00 f3 0f 1e fa f3 0f 1e RSP: 0018:ffffc9000ac9feb0 EFLAGS: 00050206 RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000020000000 RDX: 0000000000000001 RSI: ffffffff8aea7c00 RDI: ffffffff8b38a460 RBP: 1ffff1100cf4545b R08: dffffc0000000000 R09: fffffbfff1caad46 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000020000000 R13: ffff888067a2a718 R14: ffff888067a2a2d8 R15: ffff88802b1d4000 reiserfs_ioctl+0x151/0x340 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+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f731848c389 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:00007f731918e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f73185abf80 RCX: 00007f731848c389 RDX: 0000000020000000 RSI: 0000000080087601 RDI: 0000000000000005 RBP: 00007f73184d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc17c3274f R14: 00007f731918e300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: fa cli 1: 0f 01 cb stac 4: 66 89 01 mov %ax,(%rcx) 7: 31 c9 xor %ecx,%ecx 9: 0f 01 ca clac c: c3 retq d: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 14: 00 00 00 17: 66 90 xchg %ax,%ax 19: f3 0f 1e fa endbr64 1d: 48 89 cb mov %rcx,%rbx 20: 48 c1 fb 3f sar $0x3f,%rbx 24: 48 09 d9 or %rbx,%rcx 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: c3 retq 32: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 39: f3 0f 1e fa endbr64 3d: f3 repz 3e: 0f .byte 0xf 3f: 1e (bad)