loop3: detected capacity change from 0 to 32768 BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop3 scanned by syz.3.1668 (11340) BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 11340 Comm: syz.3.1668 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/31/2026 dump_backtrace(regs = 0000000000000000 tsk = 0000000000000000) Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3844 [inline] validate_chain kernel/locking/lockdep.c:3865 [inline] __lock_acquire+0x2618/0x7280 kernel/locking/lockdep.c:5171 lock_acquire+0x210/0x63c kernel/locking/lockdep.c:5790 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x70/0x98 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] delete_from_page_cache_batch+0xe0/0x75c mm/filemap.c:327 truncate_inode_pages_range+0x268/0xd48 mm/truncate.c:394 truncate_inode_pages+0x2c/0x3c mm/truncate.c:476 kill_bdev block/bdev.c:76 [inline] blkdev_flush_mapping+0x134/0x280 block/bdev.c:677 blkdev_put_whole block/bdev.c:708 [inline] blkdev_put+0x498/0x6b0 block/bdev.c:968 btrfs_scan_one_device+0x3dc/0x558 fs/btrfs/volumes.c:1468 btrfs_mount_root+0x470/0x7ec fs/btrfs/super.c:1796 legacy_get_tree+0xd8/0x174 fs/fs_context.c:632 vfs_get_tree+0x90/0x278 fs/super.c:1584 fc_mount fs/namespace.c:1048 [inline] vfs_kern_mount+0xdc/0x178 fs/namespace.c:1078 btrfs_mount+0x2dc/0x974 fs/btrfs/super.c:1894 legacy_get_tree+0xd8/0x174 fs/fs_context.c:632 vfs_get_tree+0x90/0x278 fs/super.c:1584 do_new_mount+0x228/0x818 fs/namespace.c:3104 path_mount+0x5ac/0xe6c fs/namespace.c:3462 do_mount fs/namespace.c:3475 [inline] __do_sys_mount fs/namespace.c:3683 [inline] __se_sys_mount fs/namespace.c:3660 [inline] __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3660 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589 device: 'btrfs-9': device_add kobject: 'btrfs-9' (0000000000352bf0): kobject_add_internal: parent: 'bdi', set: 'devices' bdi btrfs-9: No ACPI support PM: Adding info for No Bus:btrfs-9 kobject: 'btrfs-9' (0000000000352bf0): kobject_uevent_env kobject: 'btrfs-9' (0000000000352bf0): fill_kobj_path: path = '/devices/virtual/bdi/btrfs-9' debugfs: creating file 'btrfs-9' debugfs: creating file 'stats' BTRFS info (device loop3): first mount of filesystem 24c7a497-3402-47dd-bef8-82358f5f30e0 BTRFS info (device loop3): using crc32c (crc32c-generic) checksum algorithm BTRFS info (device loop3): max_inline at 0 BTRFS info (device loop3): max_inline at 4096 BTRFS info (device loop3): using free space tree BTRFS debug: btrfs_submit_dev_bio: rw 0 0x1000, sector=2056, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug: btrfs_submit_dev_bio: rw 0 0x1000, sector=10416, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug: btrfs_submit_dev_bio: rw 0 0x1000, sector=10424, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug: btrfs_submit_dev_bio: rw 0 0x1000, sector=10368, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug: btrfs_submit_dev_bio: rw 0 0x1000, sector=10432, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug: btrfs_submit_dev_bio: rw 0 0x1000, sector=10408, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug (device loop3): btrfs_submit_dev_bio: rw 0 0x1000, sector=10328, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug (device loop3): btrfs_submit_dev_bio: rw 0 0x1000, sector=10336, dev=7340035 (/dev/loop3 id 1), size=4096 kobject: '24c7a497-3402-47dd-bef8-82358f5f30e0' (00000000e970d497): kobject_add_internal: parent: 'btrfs', set: 'btrfs' kobject: 'devices' (00000000e7edcaa4): kobject_add_internal: parent: '24c7a497-3402-47dd-bef8-82358f5f30e0', set: '' kobject: 'devinfo' (00000000c4ddd348): kobject_add_internal: parent: '24c7a497-3402-47dd-bef8-82358f5f30e0', set: '' kobject: '1' (000000006e45995d): kobject_add_internal: parent: 'devinfo', set: '' kobject: 'discard' (00000000306c7709): kobject_add_internal: parent: '24c7a497-3402-47dd-bef8-82358f5f30e0', set: '' kobject: 'allocation' (0000000002213e7a): kobject_add_internal: parent: '24c7a497-3402-47dd-bef8-82358f5f30e0', set: '' kobject: 'system' (0000000006c892f1): kobject_add_internal: parent: 'allocation', set: '' kobject: 'mixed' (00000000f9b7c247): kobject_add_internal: parent: 'allocation', set: '' kobject: 'single' (00000000f25e0de8): kobject_add_internal: parent: 'mixed', set: '' kobject: 'single' (0000000033d758fa): kobject_add_internal: parent: 'system', set: '' BTRFS info (device loop3): enabling ssd optimizations BTRFS debug (device loop3): btrfs_submit_dev_bio: rw 0 0x1000, sector=10264, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug (device loop3): btrfs_submit_dev_bio: rw 0 0x1000, sector=10288, dev=7340035 (/dev/loop3 id 1), size=4096 BTRFS debug (device loop3): btrfs_submit_dev_bio: rw 0 0x1000, sector=10392, dev=7340035 (/dev/loop3 id 1), size=4096