------------[ cut here ]------------ NETDEV WATCHDOG: sl0 (): transmit queue 0 timed out WARNING: CPU: 1 PID: 5126 at net/sched/sch_generic.c:478 dev_watchdog+0x7f4/0xa5c net/sched/sch_generic.c:477 Modules linked in: CPU: 1 PID: 5126 Comm: syz.2.239 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : dev_watchdog+0x7f4/0xa5c net/sched/sch_generic.c:477 lr : dev_watchdog+0x7f4/0xa5c net/sched/sch_generic.c:477 sp : ffff800008017aa0 x29: ffff800008017ae0 x28: fffffffffffff851 x27: ffff0000d0c48540 x26: 0000000000000002 x25: 0000000000000000 x24: ffff0000e8de5c68 x23: ffff0000d0c48440 x22: ffff0000d0c48448 x21: dfff800000000000 x20: 00000000000007d0 x19: ffff0000d0c48000 x18: 0000000000000103 x17: 0000000000000000 x16: ffff8000083020fc x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000102 x10: 0000000000000000 x9 : ea9023b1dc04ef00 x8 : ea9023b1dc04ef00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800008017398 x4 : ffff80001424f400 x3 : ffff80000830220c x2 : 0000000000000001 x1 : 0000000000000102 x0 : 0000000000000033 Call trace: dev_watchdog+0x7f4/0xa5c net/sched/sch_generic.c:477 call_timer_fn+0x19c/0x858 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x46c/0x6c4 kernel/time/timer.c:1767 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780 handle_softirqs+0x344/0xbf0 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:457 [inline] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 irq_exit+0x14/0x88 kernel/softirq.c:683 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:765 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:855 do_interrupt_handler+0x6c/0x88 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0xa0/0x128 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:413 [inline] loop_queue_work drivers/block/loop.c:1069 [inline] loop_queue_rq+0x984/0xac0 drivers/block/loop.c:2202 __blk_mq_issue_directly block/blk-mq.c:2014 [inline] __blk_mq_try_issue_directly+0x3e8/0x69c block/blk-mq.c:2070 blk_mq_try_issue_directly+0xb8/0x270 block/blk-mq.c:2101 blk_mq_submit_bio+0xcf8/0x1698 block/blk-mq.c:-1 __submit_bio+0x5ec/0x624 block/blk-core.c:917 __submit_bio_noacct_mq block/blk-core.c:997 [inline] submit_bio_noacct+0x52c/0x624 block/blk-core.c:1027 submit_bio+0x374/0x5e0 block/blk-core.c:1089 submit_bh_wbc+0x4a8/0x5f8 fs/buffer.c:3056 submit_bh+0x3c/0x54 fs/buffer.c:3062 __ext4_read_bh fs/ext4/super.c:156 [inline] ext4_read_bh+0x170/0x2a0 fs/ext4/super.c:180 ext4_read_bh_lock fs/ext4/super.c:195 [inline] __ext4_sb_bread_gfp+0x1c8/0x2b8 fs/ext4/super.c:217 ext4_sb_bread_unmovable fs/ext4/super.c:234 [inline] ext4_fill_super+0x5cc/0x812c fs/ext4/super.c:3959 mount_bdev+0x264/0x358 fs/super.c:1400 ext4_mount+0x44/0x58 fs/ext4/super.c:6630 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3014 path_mount+0x5b4/0x1000 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount fs/namespace.c:3542 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3542 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 13309 hardirqs last enabled at (13308): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (13309): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (11526): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (13289): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (13289): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (13289): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (13289): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace bff91e51fddfdeda ]--- sl0: transmit timed out, bad line quality?