====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc5-syzkaller-00027-gfb6e71db53f3 #0 Not tainted ------------------------------------------------------ syz-executor.2/26215 is trying to acquire lock: ffff888067f27720 (mapping.invalidate_lock#6){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] ffff888067f27720 (mapping.invalidate_lock#6){++++}-{3:3}, at: f2fs_vm_page_mkwrite+0x630/0x1c90 fs/f2fs/file.c:104 but task is already holding lock: ffff8880764c6558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (sb_pagefaults#3){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1814 [inline] sb_start_pagefault include/linux/fs.h:1918 [inline] f2fs_vm_page_mkwrite+0x48a/0x1c90 fs/f2fs/file.c:99 do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 wp_page_shared mm/memory.c:3295 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3377 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 -> #4 (&mm->mmap_lock){++++}-{3:3}: __might_fault mm/memory.c:5647 [inline] __might_fault+0x10c/0x180 mm/memory.c:5640 _copy_to_user+0x29/0x150 lib/usercopy.c:29 copy_to_user include/linux/uaccess.h:169 [inline] f2fs_ioc_get_encryption_pwsalt+0x2b2/0x370 fs/f2fs/file.c:2365 __f2fs_ioctl+0x29f1/0xaaf0 fs/f2fs/file.c:4169 f2fs_compat_ioctl+0x399/0x630 fs/f2fs/file.c:4867 __do_compat_sys_ioctl+0x255/0x2b0 fs/ioctl.c:968 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #3 (&sbi->sb_lock){++++}-{3:3}: down_write+0x94/0x220 kernel/locking/rwsem.c:1562 f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] f2fs_handle_error+0x8e/0x200 fs/f2fs/super.c:3926 f2fs_check_nid_range.part.0+0x4d/0x60 fs/f2fs/node.c:39 f2fs_check_nid_range fs/f2fs/node.c:2278 [inline] add_free_nid.isra.0+0x781/0x940 fs/f2fs/node.c:2285 scan_nat_page fs/f2fs/node.c:2387 [inline] __f2fs_build_free_nids+0x5b5/0xe10 fs/f2fs/node.c:2493 f2fs_build_free_nids fs/f2fs/node.c:2531 [inline] f2fs_build_node_manager+0x2007/0x2fb0 fs/f2fs/node.c:3316 f2fs_fill_super+0x3ade/0x7680 fs/f2fs/super.c:4334 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __ia32_sys_mount+0x282/0x300 fs/namespace.c:3674 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #2 (&nm_i->nat_tree_lock){++++}-{3:3}: down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_get_node_info+0x1ac/0x1070 fs/f2fs/node.c:564 f2fs_new_node_page+0x249/0xac0 fs/f2fs/node.c:1295 f2fs_get_dnode_of_data+0x530/0x2480 fs/f2fs/node.c:810 f2fs_reserve_block+0x4d/0x430 fs/f2fs/data.c:1199 f2fs_get_new_data_page+0xfb/0x6b0 fs/f2fs/data.c:1387 f2fs_add_regular_entry+0x4e9/0xbd0 fs/f2fs/dir.c:754 f2fs_add_dentry+0x1b5/0x210 fs/f2fs/dir.c:816 f2fs_do_add_link+0x183/0x270 fs/f2fs/dir.c:855 f2fs_add_link fs/f2fs/f2fs.h:3564 [inline] f2fs_create+0x3c1/0x670 fs/f2fs/namei.c:363 lookup_open.isra.0+0xee7/0x1270 fs/namei.c:3413 open_last_lookups fs/namei.c:3481 [inline] path_openat+0x975/0x2a50 fs/namei.c:3711 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __ia32_sys_creat+0xcc/0x120 fs/open.c:1396 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #1 (&sbi->cp_rwsem){++++}-{3:3}: down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 f2fs_down_read fs/f2fs/f2fs.h:2188 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline] f2fs_do_truncate_blocks+0x6ae/0x11e0 fs/f2fs/file.c:688 f2fs_truncate_blocks+0x7b/0x310 fs/f2fs/file.c:751 f2fs_truncate.part.0+0x498/0x7c0 fs/f2fs/file.c:803 f2fs_truncate include/linux/fs.h:806 [inline] f2fs_setattr+0x1b00/0x2350 fs/f2fs/file.c:1010 notify_change+0xca7/0x1420 fs/attr.c:482 do_truncate+0x143/0x200 fs/open.c:65 handle_truncate fs/namei.c:3216 [inline] do_open fs/namei.c:3561 [inline] path_openat+0x2157/0x2a50 fs/namei.c:3714 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_compat_sys_openat fs/open.c:1386 [inline] __se_compat_sys_openat fs/open.c:1384 [inline] __ia32_compat_sys_openat+0x143/0x1f0 fs/open.c:1384 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 -> #0 (mapping.invalidate_lock#6){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x630/0x1c90 fs/f2fs/file.c:104 do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 wp_page_shared mm/memory.c:3295 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3377 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 other info that might help us debug this: Chain exists of: mapping.invalidate_lock#6 --> &mm->mmap_lock --> sb_pagefaults#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_pagefaults#3); lock(&mm->mmap_lock); lock(sb_pagefaults#3); lock(mapping.invalidate_lock#6); *** DEADLOCK *** 2 locks held by syz-executor.2/26215: #0: ffff88802034ea58 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff88802034ea58 (&mm->mmap_lock){++++}-{3:3}, at: do_user_addr_fault+0x276/0x1210 arch/x86/mm/fault.c:1369 #1: ffff8880764c6558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 stack backtrace: CPU: 2 PID: 26215 Comm: syz-executor.2 Not tainted 6.2.0-rc5-syzkaller-00027-gfb6e71db53f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_read+0x9c/0x450 kernel/locking/rwsem.c:1509 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] f2fs_vm_page_mkwrite+0x630/0x1c90 fs/f2fs/file.c:104 do_page_mkwrite+0x19b/0x680 mm/memory.c:2947 wp_page_shared mm/memory.c:3295 [inline] do_wp_page+0x353/0x3370 mm/memory.c:3377 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault+0x1f58/0x3c90 mm/memory.c:5073 handle_mm_fault+0x1b6/0x850 mm/memory.c:5219 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0023:0xf721b7db Code: d0 74 1f 89 d0 83 f0 01 09 c8 0f 85 c5 fe ff ff 8b 44 24 20 c7 44 24 24 00 00 00 00 0f c8 89 44 24 20 8b 44 24 1c 8b 74 24 20 <89> 30 e9 07 fb ff ff 0f b6 4c 24 10 8b 5c 24 28 89 cf c1 ef 05 83 RSP: 002b:00000000ffc487b0 EFLAGS: 00010246 RAX: 00000000200015c0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00000000ffc4895c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: d0 74 1f 89 shlb -0x77(%rdi,%rbx,1) 4: d0 83 f0 01 09 c8 rolb -0x37f6fe10(%rbx) a: 0f 85 c5 fe ff ff jne 0xfffffed5 10: 8b 44 24 20 mov 0x20(%rsp),%eax 14: c7 44 24 24 00 00 00 movl $0x0,0x24(%rsp) 1b: 00 1c: 0f c8 bswap %eax 1e: 89 44 24 20 mov %eax,0x20(%rsp) 22: 8b 44 24 1c mov 0x1c(%rsp),%eax 26: 8b 74 24 20 mov 0x20(%rsp),%esi * 2a: 89 30 mov %esi,(%rax) <-- trapping instruction 2c: e9 07 fb ff ff jmpq 0xfffffb38 31: 0f b6 4c 24 10 movzbl 0x10(%rsp),%ecx 36: 8b 5c 24 28 mov 0x28(%rsp),%ebx 3a: 89 cf mov %ecx,%edi 3c: c1 ef 05 shr $0x5,%edi 3f: 83 .byte 0x83