====================================================== WARNING: possible circular locking dependency detected 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 Not tainted ------------------------------------------------------ syz-executor.0/20829 is trying to acquire lock: ffff80008e3148a8 (bdev_lock){+.+.}-{3:3}, at: bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 but task is already holding lock: ffff0000c1457c58 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] ffff0000c1457c58 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_discard block/ioctl.c:115 [inline] ffff0000c1457c58 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1c60/0x2884 block/ioctl.c:506 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (mapping.invalidate_lock#2){++++}-{3:3}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:857 [inline] page_cache_ra_unbounded+0xc8/0x58c mm/readahead.c:225 do_page_cache_ra mm/readahead.c:299 [inline] page_cache_ra_order+0x7fc/0x994 mm/readahead.c:546 ondemand_readahead+0x608/0xafc mm/readahead.c:668 page_cache_async_ra+0x1b0/0x1cc mm/readahead.c:717 do_async_mmap_readahead mm/filemap.c:3227 [inline] filemap_fault+0x4e4/0xff4 mm/filemap.c:3281 __do_fault+0x11c/0x3d8 mm/memory.c:4204 do_cow_fault mm/memory.c:4604 [inline] do_fault mm/memory.c:4707 [inline] do_pte_missing mm/memory.c:3669 [inline] handle_pte_fault mm/memory.c:4978 [inline] __handle_mm_fault mm/memory.c:5119 [inline] handle_mm_fault+0x2548/0x49fc mm/memory.c:5284 faultin_page mm/gup.c:956 [inline] __get_user_pages+0x3e0/0xa24 mm/gup.c:1239 __get_user_pages_locked mm/gup.c:1504 [inline] __gup_longterm_locked+0x418/0x1e84 mm/gup.c:2203 pin_user_pages+0x138/0x1e0 mm/gup.c:3377 xdp_umem_pin_pages net/xdp/xdp_umem.c:105 [inline] xdp_umem_reg net/xdp/xdp_umem.c:218 [inline] xdp_umem_create+0x78c/0xd28 net/xdp/xdp_umem.c:251 xsk_setsockopt+0x74c/0x9e4 net/xdp/xsk.c:1313 __sys_setsockopt+0x388/0x654 net/socket.c:2325 __do_sys_setsockopt net/socket.c:2336 [inline] __se_sys_setsockopt net/socket.c:2333 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2333 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 -> #4 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc4/0x124 mm/memory.c:5896 fault_in_readable+0x184/0x5e0 mm/gup.c:1977 fault_in_iov_iter_readable+0xcc/0x22c lib/iov_iter.c:216 generic_perform_write+0x1d0/0x588 mm/filemap.c:3959 ext4_buffered_write_iter+0x2c0/0x4ec fs/ext4/file.c:299 ext4_file_write_iter+0x184/0x17bc call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x628/0x93c fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 -> #3 (&sb->s_type->i_mutex_key#8){++++}-{3:3}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1520 inode_lock_shared include/linux/fs.h:812 [inline] ext4_bmap+0x50/0x210 fs/ext4/inode.c:3089 bmap+0xa8/0xe8 fs/inode.c:1826 jbd2_journal_init_inode+0xa4/0x358 fs/jbd2/journal.c:1669 ext4_open_inode_journal fs/ext4/super.c:5833 [inline] ext4_load_journal fs/ext4/super.c:5992 [inline] ext4_load_and_init_journal+0x2e8/0x1f54 fs/ext4/super.c:4906 __ext4_fill_super fs/ext4/super.c:5374 [inline] ext4_fill_super+0x31bc/0x56ec fs/ext4/super.c:5703 get_tree_bdev+0x33c/0x4a8 fs/super.c:1577 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5735 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 init_mount+0xe4/0x144 fs/init.c:25 do_mount_root+0x104/0x3e4 init/do_mounts.c:166 mount_root_generic+0x1f0/0x594 init/do_mounts.c:205 mount_block_root+0x6c/0x7c init/do_mounts.c:378 mount_root+0xb4/0xe4 init/do_mounts.c:405 prepare_namespace+0xdc/0x11c init/do_mounts.c:489 kernel_init_freeable+0x35c/0x474 init/main.c:1560 kernel_init+0x24/0x29c init/main.c:1437 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 -> #2 (&type->s_umount_key#29){++++}-{3:3}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1520 __super_lock fs/super.c:58 [inline] super_lock+0x160/0x328 fs/super.c:117 super_lock_shared fs/super.c:146 [inline] super_lock_shared_active fs/super.c:1431 [inline] fs_bdev_sync+0xa4/0x168 fs/super.c:1466 blkdev_flushbuf block/ioctl.c:372 [inline] blkdev_common_ioctl+0x848/0x2884 block/ioctl.c:502 blkdev_ioctl+0x35c/0xae4 block/ioctl.c:624 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 -> #1 (&bdev->bd_holder_lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_finish_claiming+0x218/0x3dc block/bdev.c:566 blkdev_get_by_dev+0x3f4/0x55c block/bdev.c:799 setup_bdev_super+0x68/0x51c fs/super.c:1484 mount_bdev+0x1a0/0x2b4 fs/super.c:1626 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1750 do_new_mount+0x25c/0x8c8 fs/namespace.c:3335 path_mount+0x590/0xe04 fs/namespace.c:3662 init_mount+0xe4/0x144 fs/init.c:25 do_mount_root+0x104/0x3e4 init/do_mounts.c:166 mount_root_generic+0x1f0/0x594 init/do_mounts.c:205 mount_block_root+0x6c/0x7c init/do_mounts.c:378 mount_root+0xb4/0xe4 init/do_mounts.c:405 prepare_namespace+0xdc/0x11c init/do_mounts.c:489 kernel_init_freeable+0x35c/0x474 init/main.c:1560 kernel_init+0x24/0x29c init/main.c:1437 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 -> #0 (bdev_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x3370/0x75e8 kernel/locking/lockdep.c:5136 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 truncate_bdev_range+0x60/0x27c block/bdev.c:105 blk_ioctl_discard block/ioctl.c:116 [inline] blkdev_common_ioctl+0x1c74/0x2884 block/ioctl.c:506 blkdev_ioctl+0x35c/0xae4 block/ioctl.c:624 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 other info that might help us debug this: Chain exists of: bdev_lock --> &mm->mmap_lock --> mapping.invalidate_lock#2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(mapping.invalidate_lock#2); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#2); lock(bdev_lock); *** DEADLOCK *** 1 lock held by syz-executor.0/20829: #0: ffff0000c1457c58 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #0: ffff0000c1457c58 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_discard block/ioctl.c:115 [inline] #0: ffff0000c1457c58 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1c60/0x2884 block/ioctl.c:506 stack backtrace: CPU: 0 PID: 20829 Comm: syz-executor.0 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2060 check_noncircular+0x310/0x404 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:3868 [inline] __lock_acquire+0x3370/0x75e8 kernel/locking/lockdep.c:5136 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 bd_prepare_to_claim+0x1a4/0x49c block/bdev.c:508 truncate_bdev_range+0x60/0x27c block/bdev.c:105 blk_ioctl_discard block/ioctl.c:116 [inline] blkdev_common_ioctl+0x1c74/0x2884 block/ioctl.c:506 blkdev_ioctl+0x35c/0xae4 block/ioctl.c:624 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595