INFO: task syz-executor.4:25386 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29472 pid:25386 tgid:25379 ppid:22600 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline] __down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:838 [inline] blkdev_fallocate+0x1e9/0x450 block/fops.c:797 vfs_fallocate+0x4b8/0xf70 fs/open.c:330 madvise_remove mm/madvise.c:1002 [inline] madvise_vma_behavior+0x1a24/0x1bb0 mm/madvise.c:1026 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1261 do_madvise+0x309/0x640 mm/madvise.c:1441 __do_sys_madvise mm/madvise.c:1454 [inline] __se_sys_madvise mm/madvise.c:1452 [inline] __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1452 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7feb82c7dda9 RSP: 002b:00007feb81fde0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007feb82dac050 RCX: 00007feb82c7dda9 RDX: 0000000000000009 RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007feb82cca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007feb82dac050 R15: 00007ffcbbe85ed8 INFO: task syz-executor.3:25385 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27440 pid:25385 tgid:25381 ppid:17950 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline] __down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:838 [inline] blkdev_fallocate+0x1e9/0x450 block/fops.c:797 vfs_fallocate+0x4b8/0xf70 fs/open.c:330 madvise_remove mm/madvise.c:1002 [inline] madvise_vma_behavior+0x1a24/0x1bb0 mm/madvise.c:1026 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1261 do_madvise+0x309/0x640 mm/madvise.c:1441 __do_sys_madvise mm/madvise.c:1454 [inline] __se_sys_madvise mm/madvise.c:1452 [inline] __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1452 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f2628e7dda9 RSP: 002b:00007f2629b5f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f2628fabf80 RCX: 00007f2628e7dda9 RDX: 0000000000000009 RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007f2628eca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f2628fabf80 R15: 00007ffde5a8da98 INFO: task syz-executor.3:25389 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29312 pid:25389 tgid:25381 ppid:17950 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline] __down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:838 [inline] blkdev_fallocate+0x1e9/0x450 block/fops.c:797 vfs_fallocate+0x4b8/0xf70 fs/open.c:330 madvise_remove mm/madvise.c:1002 [inline] madvise_vma_behavior+0x1a24/0x1bb0 mm/madvise.c:1026 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1261 do_madvise+0x309/0x640 mm/madvise.c:1441 __do_sys_madvise mm/madvise.c:1454 [inline] __se_sys_madvise mm/madvise.c:1452 [inline] __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1452 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f2628e7dda9 RSP: 002b:00007f2629b3e0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f2628fac050 RCX: 00007f2628e7dda9 RDX: 0000000000000009 RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007f2628eca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f2628fac050 R15: 00007ffde5a8da98 Showing all locks held in the system: 2 locks held by kworker/u8:0/10: 1 lock held by khungtaskd/29: #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 2 locks held by getty/4821: #0: ffff88802adda0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 2 locks held by syz-executor.4/25382: 1 lock held by syz-executor.4/25386: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.3/25385: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.3/25389: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.0/25485: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.4/25604: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.1/25610: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.1/25613: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.3/25788: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0x138/0x5f0 mm/readahead.c:225 1 lock held by syz-executor.1/25898: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:797 1 lock held by syz-executor.2/25907: #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline] #0: ffff88801d4ae540 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0x138/0x5f0 mm/readahead.c:225 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf86/0x1210 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2427 Comm: kworker/u8:7 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x0/0x20 kernel/kcov.c:310 Code: 0c 24 89 f2 89 fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 0c 24 48 89 f2 48 89 fe bf 07 00 00 00 e9 f8 fd RSP: 0018:ffffc90009d0f750 EFLAGS: 00000246 RAX: ffffffff8a1d62e5 RBX: ffffffff8a1d62e5 RCX: ffffffff813c9087 RDX: ffff888029e23c00 RSI: ffffffff8a1d62e5 RDI: 0000000000000000 RBP: ffffc90009d0f7f0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000003 R12: ffffc90009d0f760 R13: ffffffff8178d3a0 R14: ffffc90009d0f820 R15: ffff888029e23c00 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c041ea1710 CR3: 000000000d57a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0xce/0x170 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x12e/0x360 mm/slub.c:4344 skb_kfree_head net/core/skbuff.c:1094 [inline] skb_kfree_head net/core/skbuff.c:1091 [inline] skb_free_head+0x19a/0x1e0 net/core/skbuff.c:1108 skb_release_data+0x76c/0x990 net/core/skbuff.c:1136 skb_release_all net/core/skbuff.c:1202 [inline] __kfree_skb net/core/skbuff.c:1216 [inline] kfree_skb_reason+0x12d/0x210 net/core/skbuff.c:1252 kfree_skb include/linux/skbuff.h:1267 [inline] ieee80211_iface_work+0x435/0xf00 net/mac80211/iface.c:1661 cfg80211_wiphy_work+0x255/0x330 net/wireless/core.c:437 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243