====================================================== WARNING: possible circular locking dependency detected 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #0 Not tainted ------------------------------------------------------ syz-executor.3/18898 is trying to acquire lock: ffff88803be2a090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 but task is already holding lock: ffff8880867791c0 (mapping.invalidate_lock#17){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] ffff8880867791c0 (mapping.invalidate_lock#17){.+.+}-{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: -> #2 (mapping.invalidate_lock#17){.+.+}-{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] filemap_fault+0x647/0x1810 mm/filemap.c:3277 __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 mm/memory.c:3647 [inline] handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x2098/0x5860 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+0x7d2/0x910 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #1 (&mm->mmap_lock){++++}-{3:3}: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705 __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: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+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_get_block+0x280/0x5130 fs/reiserfs/inode.c:680 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 page_cache_sync_readahead include/linux/pagemap.h:1211 [inline] filemap_get_pages+0x49c/0x20c0 mm/filemap.c:2601 filemap_read+0x45a/0x1170 mm/filemap.c:2696 call_read_iter include/linux/fs.h:1862 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x788/0xb00 fs/read_write.c:470 ksys_read+0x1a0/0x2c0 fs/read_write.c:613 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: Chain exists of: &sbi->lock --> &mm->mmap_lock --> mapping.invalidate_lock#17 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#17); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#17); lock(&sbi->lock); *** DEADLOCK *** 2 locks held by syz-executor.3/18898: #0: ffff88803bd12868 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0 fs/file.c:1047 #1: ffff8880867791c0 (mapping.invalidate_lock#17){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] #1: ffff8880867791c0 (mapping.invalidate_lock#17){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:226 stack backtrace: CPU: 1 PID: 18898 Comm: syz-executor.3 Not tainted 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #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+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_get_block+0x280/0x5130 fs/reiserfs/inode.c:680 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 page_cache_sync_readahead include/linux/pagemap.h:1211 [inline] filemap_get_pages+0x49c/0x20c0 mm/filemap.c:2601 filemap_read+0x45a/0x1170 mm/filemap.c:2696 call_read_iter include/linux/fs.h:1862 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x788/0xb00 fs/read_write.c:470 ksys_read+0x1a0/0x2c0 fs/read_write.c:613 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: 0033:0x7f1d5ce8c389 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:00007f1d5db65168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f1d5cfac050 RCX: 00007f1d5ce8c389 RDX: 0000000000002020 RSI: 0000000020001740 RDI: 0000000000000005 RBP: 00007f1d5ced7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2a2a2b9f R14: 00007f1d5db65300 R15: 0000000000022000