Buffer I/O error on dev loop1, logical block 1434, async page read Buffer I/O error on dev loop1, logical block 1435, async page read ====================================================== WARNING: possible circular locking dependency detected 6.9.0-syzkaller-08995-g0450d2083be6 #0 Not tainted ------------------------------------------------------ syz-executor.1/22245 is trying to acquire lock: ffffffff8dd3a8c0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:312 [inline] ffffffff8dd3a8c0 (fs_reclaim){+.+.}-{0:0}, at: mempool_alloc+0xd9/0x390 mm/mempool.c:398 but task is already holding lock: ffff888068818448 (mapping.invalidate_lock#11){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:846 [inline] ffff888068818448 (mapping.invalidate_lock#11){++++}-{3:3}, at: filemap_fault+0x5cb/0x2630 mm/filemap.c:3296 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (mapping.invalidate_lock#11){++++}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 filemap_invalidate_lock include/linux/fs.h:836 [inline] udf_setsize+0x256/0x1180 fs/udf/inode.c:1254 udf_evict_inode+0x361/0x590 fs/udf/inode.c:144 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4774 shrink_many mm/vmscan.c:4835 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935 shrink_node mm/vmscan.c:5894 [inline] kswapd_shrink_node mm/vmscan.c:6704 [inline] balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895 kswapd+0x5ea/0xbf0 mm/vmscan.c:7164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #0 (fs_reclaim){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3698 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712 might_alloc include/linux/sched/mm.h:312 [inline] mempool_alloc+0xd9/0x390 mm/mempool.c:398 bio_alloc_bioset+0x480/0x8b0 block/bio.c:554 bio_alloc include/linux/bio.h:437 [inline] do_mpage_readpage+0xf30/0x17c0 fs/mpage.c:297 mpage_read_folio+0xa9/0x140 fs/mpage.c:399 udf_read_folio+0x8b/0xe0 fs/udf/inode.c:235 filemap_read_folio+0xe5/0x2c0 mm/filemap.c:2331 filemap_fault+0x1458/0x2630 mm/filemap.c:3381 __do_fault+0x10a/0x490 mm/memory.c:4526 do_read_fault mm/memory.c:4889 [inline] do_fault mm/memory.c:5019 [inline] do_pte_missing mm/memory.c:3875 [inline] handle_pte_fault mm/memory.c:5295 [inline] __handle_mm_fault+0x371d/0x4a80 mm/memory.c:5436 handle_mm_fault+0x476/0xa00 mm/memory.c:5601 do_user_addr_fault+0x2e5/0x1010 arch/x86/mm/fault.c:1383 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1533 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:125 [inline] _copy_from_user+0xc1/0xf0 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:183 [inline] copy_from_bpfptr_offset include/linux/bpfptr.h:53 [inline] copy_from_bpfptr include/linux/bpfptr.h:59 [inline] __sys_bpf+0x22b/0x58f0 kernel/bpf/syscall.c:5660 __do_sys_bpf kernel/bpf/syscall.c:5794 [inline] __se_sys_bpf kernel/bpf/syscall.c:5792 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5792 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#11); lock(fs_reclaim); lock(mapping.invalidate_lock#11); lock(fs_reclaim); *** DEADLOCK *** 1 lock held by syz-executor.1/22245: #0: ffff888068818448 (mapping.invalidate_lock#11){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:846 [inline] #0: ffff888068818448 (mapping.invalidate_lock#11){++++}-{3:3}, at: filemap_fault+0x5cb/0x2630 mm/filemap.c:3296 stack backtrace: CPU: 3 PID: 22245 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-08995-g0450d2083be6 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3698 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712 might_alloc include/linux/sched/mm.h:312 [inline] mempool_alloc+0xd9/0x390 mm/mempool.c:398 bio_alloc_bioset+0x480/0x8b0 block/bio.c:554 bio_alloc include/linux/bio.h:437 [inline] do_mpage_readpage+0xf30/0x17c0 fs/mpage.c:297 mpage_read_folio+0xa9/0x140 fs/mpage.c:399 udf_read_folio+0x8b/0xe0 fs/udf/inode.c:235 filemap_read_folio+0xe5/0x2c0 mm/filemap.c:2331 filemap_fault+0x1458/0x2630 mm/filemap.c:3381 __do_fault+0x10a/0x490 mm/memory.c:4526 do_read_fault mm/memory.c:4889 [inline] do_fault mm/memory.c:5019 [inline] do_pte_missing mm/memory.c:3875 [inline] handle_pte_fault mm/memory.c:5295 [inline] __handle_mm_fault+0x371d/0x4a80 mm/memory.c:5436 handle_mm_fault+0x476/0xa00 mm/memory.c:5601 do_user_addr_fault+0x2e5/0x1010 arch/x86/mm/fault.c:1383 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1533 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline] RIP: 0010:raw_copy_from_user arch/x86/include/asm/uaccess_64.h:125 [inline] RIP: 0010:_copy_from_user+0xc1/0xf0 lib/usercopy.c:23 Code: 89 df e8 f2 ea 0e fd 4d 85 f6 75 9e e8 98 f0 0e fd 0f ae e8 89 ee 4c 89 ef e8 2b 33 6c fd 0f 01 cb 48 89 e9 4c 89 ef 48 89 de a4 0f 1f 00 48 89 cb 0f 01 ca e9 73 ff ff ff e8 6a f0 0e fd 48 RSP: 0018:ffffc9000425fc10 EFLAGS: 00050246 RAX: 0000000000000001 RBX: 0000000020000540 RCX: 0000000000000020 RDX: fffff5200084bfba RSI: 0000000020000540 RDI: ffffc9000425fdb0 RBP: 0000000000000020 R08: 0000000000000001 R09: fffff5200084bfb9 R10: ffffc9000425fdcf R11: 0000000000000000 R12: 0000000020000560 R13: ffffc9000425fdb0 R14: 0000000000000000 R15: ffffc9000425fdb0 copy_from_user include/linux/uaccess.h:183 [inline] copy_from_bpfptr_offset include/linux/bpfptr.h:53 [inline] copy_from_bpfptr include/linux/bpfptr.h:59 [inline] __sys_bpf+0x22b/0x58f0 kernel/bpf/syscall.c:5660 __do_sys_bpf kernel/bpf/syscall.c:5794 [inline] __se_sys_bpf kernel/bpf/syscall.c:5792 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5792 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72f9579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5eeb5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000020000540 RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 89 df mov %ebx,%edi 2: e8 f2 ea 0e fd call 0xfd0eeaf9 7: 4d 85 f6 test %r14,%r14 a: 75 9e jne 0xffffffaa c: e8 98 f0 0e fd call 0xfd0ef0a9 11: 0f ae e8 lfence 14: 89 ee mov %ebp,%esi 16: 4c 89 ef mov %r13,%rdi 19: e8 2b 33 6c fd call 0xfd6c3349 1e: 0f 01 cb stac 21: 48 89 e9 mov %rbp,%rcx 24: 4c 89 ef mov %r13,%rdi 27: 48 89 de mov %rbx,%rsi * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 0f 1f 00 nopl (%rax) 2f: 48 89 cb mov %rcx,%rbx 32: 0f 01 ca clac 35: e9 73 ff ff ff jmp 0xffffffad 3a: e8 6a f0 0e fd call 0xfd0ef0a9 3f: 48 rex.W