====================================================== WARNING: possible circular locking dependency detected 5.15.153-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/9154 is trying to acquire lock: ffff88806fafe400 (&rl->lock){+.+.}-{3:3}, at: __ntfs_clear_inode+0x32/0x1f0 fs/ntfs/inode.c:2189 but task is already holding lock: ffffffff8c9e04a0 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4621 [inline] ffffffff8c9e04a0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4645 [inline] ffffffff8c9e04a0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0xfec/0x2800 mm/page_alloc.c:5051 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (fs_reclaim){+.+.}-{0:0}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __fs_reclaim_acquire mm/page_alloc.c:4547 [inline] fs_reclaim_acquire+0x83/0x120 mm/page_alloc.c:4561 prepare_alloc_pages+0x147/0x5b0 mm/page_alloc.c:5193 __alloc_pages+0x14f/0x700 mm/page_alloc.c:5410 __page_cache_alloc+0xd4/0x4a0 mm/filemap.c:1022 do_read_cache_page+0x1e5/0x1040 mm/filemap.c:3457 read_mapping_page include/linux/pagemap.h:515 [inline] ntfs_map_page+0x25/0x390 fs/ntfs/aops.h:75 map_mft_record_page fs/ntfs/mft.c:73 [inline] map_mft_record+0x1ec/0x850 fs/ntfs/mft.c:156 ntfs_read_locked_inode+0x199/0x49c0 fs/ntfs/inode.c:550 ntfs_iget+0x10f/0x190 fs/ntfs/inode.c:177 ntfs_lookup+0x28a/0xdf0 fs/ntfs/namei.c:117 __lookup_slow+0x275/0x3d0 fs/namei.c:1663 lookup_slow+0x53/0x70 fs/namei.c:1680 walk_component+0x48c/0x610 fs/namei.c:1976 lookup_last fs/namei.c:2431 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2455 filename_lookup+0x230/0x5c0 fs/namei.c:2484 user_path_at_empty+0x40/0x180 fs/namei.c:2883 user_path_at include/linux/namei.h:57 [inline] do_sys_truncate+0xa3/0x190 fs/open.c:132 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #1 (&ni->mrec_lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 map_mft_record+0x4a/0x850 fs/ntfs/mft.c:154 ntfs_truncate+0x263/0x2860 fs/ntfs/inode.c:2383 ntfs_truncate_vfs fs/ntfs/inode.c:2862 [inline] ntfs_setattr+0x2c7/0x3a0 fs/ntfs/inode.c:2914 notify_change+0xc6d/0xf50 fs/attr.c:505 do_truncate+0x21c/0x300 fs/open.c:65 vfs_truncate+0x2dd/0x3a0 fs/open.c:111 do_sys_truncate+0xda/0x190 fs/open.c:134 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #0 (&rl->lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 __ntfs_clear_inode+0x32/0x1f0 fs/ntfs/inode.c:2189 ntfs_evict_big_inode+0x2ad/0x480 fs/ntfs/inode.c:2278 evict+0x2a4/0x620 fs/inode.c:587 dispose_list fs/inode.c:620 [inline] prune_icache_sb+0x235/0x2e0 fs/inode.c:815 super_cache_scan+0x372/0x480 fs/super.c:107 do_shrink_slab+0x542/0xda0 mm/vmscan.c:758 shrink_slab_memcg mm/vmscan.c:827 [inline] shrink_slab+0x5a1/0x960 mm/vmscan.c:906 shrink_node_memcgs mm/vmscan.c:2951 [inline] shrink_node+0x1113/0x25d0 mm/vmscan.c:3072 shrink_zones mm/vmscan.c:3275 [inline] do_try_to_free_pages+0x650/0x1670 mm/vmscan.c:3330 try_to_free_pages+0x9dc/0xfd0 mm/vmscan.c:3565 __perform_reclaim mm/page_alloc.c:4624 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4645 [inline] __alloc_pages_slowpath+0x108a/0x2800 mm/page_alloc.c:5051 __alloc_pages+0x45a/0x700 mm/page_alloc.c:5434 vm_area_alloc_pages mm/vmalloc.c:2868 [inline] __vmalloc_area_node mm/vmalloc.c:2924 [inline] __vmalloc_node_range+0x5ab/0x8c0 mm/vmalloc.c:3029 vmalloc_user+0x70/0x80 mm/vmalloc.c:3165 vb2_vmalloc_alloc+0xee/0x330 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:233 [inline] __vb2_queue_alloc+0x6f4/0x12d0 drivers/media/common/videobuf2/videobuf2-core.c:439 vb2_core_create_bufs+0x496/0xaa0 drivers/media/common/videobuf2/videobuf2-core.c:946 vb2_create_bufs+0x7d1/0x1080 drivers/media/common/videobuf2/videobuf2-v4l2.c:799 v4l_create_bufs+0x1e2/0x340 drivers/media/v4l2-core/v4l2-ioctl.c:2072 __video_do_ioctl+0xa44/0xe40 drivers/media/v4l2-core/v4l2-ioctl.c:2976 video_usercopy+0xa87/0x1120 drivers/media/v4l2-core/v4l2-ioctl.c:3324 v4l2_ioctl+0x181/0x1d0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb other info that might help us debug this: Chain exists of: &rl->lock --> &ni->mrec_lock --> fs_reclaim Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); lock(&ni->mrec_lock); lock(fs_reclaim); lock(&rl->lock); *** DEADLOCK *** 4 locks held by syz-executor.4/9154: #0: ffff88805c5342f0 (&ctx->vb_mutex){+.+.}-{3:3}, at: __video_do_ioctl+0x505/0xe40 drivers/media/v4l2-core/v4l2-ioctl.c:2944 #1: ffffffff8c9e04a0 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4621 [inline] #1: ffffffff8c9e04a0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4645 [inline] #1: ffffffff8c9e04a0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath+0xfec/0x2800 mm/page_alloc.c:5051 #2: ffffffff8c9bdaf0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab_memcg mm/vmscan.c:800 [inline] #2: ffffffff8c9bdaf0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x2d1/0x960 mm/vmscan.c:906 #3: ffff88807a1160e0 (&type->s_umount_key#94){++++}-{3:3}, at: trylock_super fs/super.c:418 [inline] #3: ffff88807a1160e0 (&type->s_umount_key#94){++++}-{3:3}, at: super_cache_scan+0x73/0x480 fs/super.c:80 stack backtrace: CPU: 0 PID: 9154 Comm: syz-executor.4 Not tainted 5.15.153-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x97/0x170 kernel/locking/rwsem.c:1541 __ntfs_clear_inode+0x32/0x1f0 fs/ntfs/inode.c:2189 ntfs_evict_big_inode+0x2ad/0x480 fs/ntfs/inode.c:2278 evict+0x2a4/0x620 fs/inode.c:587 dispose_list fs/inode.c:620 [inline] prune_icache_sb+0x235/0x2e0 fs/inode.c:815 super_cache_scan+0x372/0x480 fs/super.c:107 do_shrink_slab+0x542/0xda0 mm/vmscan.c:758 shrink_slab_memcg mm/vmscan.c:827 [inline] shrink_slab+0x5a1/0x960 mm/vmscan.c:906 shrink_node_memcgs mm/vmscan.c:2951 [inline] shrink_node+0x1113/0x25d0 mm/vmscan.c:3072 shrink_zones mm/vmscan.c:3275 [inline] do_try_to_free_pages+0x650/0x1670 mm/vmscan.c:3330 try_to_free_pages+0x9dc/0xfd0 mm/vmscan.c:3565 __perform_reclaim mm/page_alloc.c:4624 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4645 [inline] __alloc_pages_slowpath+0x108a/0x2800 mm/page_alloc.c:5051 __alloc_pages+0x45a/0x700 mm/page_alloc.c:5434 vm_area_alloc_pages mm/vmalloc.c:2868 [inline] __vmalloc_area_node mm/vmalloc.c:2924 [inline] __vmalloc_node_range+0x5ab/0x8c0 mm/vmalloc.c:3029 vmalloc_user+0x70/0x80 mm/vmalloc.c:3165 vb2_vmalloc_alloc+0xee/0x330 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:233 [inline] __vb2_queue_alloc+0x6f4/0x12d0 drivers/media/common/videobuf2/videobuf2-core.c:439 vb2_core_create_bufs+0x496/0xaa0 drivers/media/common/videobuf2/videobuf2-core.c:946 vb2_create_bufs+0x7d1/0x1080 drivers/media/common/videobuf2/videobuf2-v4l2.c:799 v4l_create_bufs+0x1e2/0x340 drivers/media/v4l2-core/v4l2-ioctl.c:2072 __video_do_ioctl+0xa44/0xe40 drivers/media/v4l2-core/v4l2-ioctl.c:2976 video_usercopy+0xa87/0x1120 drivers/media/v4l2-core/v4l2-ioctl.c:3324 v4l2_ioctl+0x181/0x1d0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff957439da9 Code: Unable to access opcode bytes at RIP 0x7ff957439d7f. RSP: 002b:00007ff9559ba0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff957567f80 RCX: 00007ff957439da9 RDX: 0000000020000040 RSI: 00000000c100565c RDI: 0000000000000003 RBP: 00007ff95748647a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff957567f80 R15: 00007fff2a4d5358 syz-executor.4 (9154) used greatest stack depth: 18552 bytes left