INFO: task syz-executor372:3619 blocked for more than 143 seconds. Not tainted 6.0.0-syzkaller-06475-g4c86114194e6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor372 state:D stack:23536 pid: 3619 ppid: 3618 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5183 [inline] __schedule+0x91f/0xdf0 kernel/sched/core.c:6495 schedule+0xcb/0x190 kernel/sched/core.c:6571 rwsem_down_write_slowpath+0xf1c/0x1350 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1553 filemap_invalidate_lock include/linux/fs.h:801 [inline] blkdev_fallocate+0x21f/0x390 block/fops.c:641 vfs_fallocate+0x515/0x670 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 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+0x63/0xcd RIP: 0033:0x7fd38a3d9e09 RSP: 002b:00007ffdf0659e18 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fd38a3d9e09 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0002000080000000 R11: 0000000000000246 R12: 00007fd38a39d5e0 R13: 0000000000000000 R14: 00007ffdf0659e40 R15: 00007ffdf0659e30 INFO: task syz-executor372:3620 blocked for more than 143 seconds. Not tainted 6.0.0-syzkaller-06475-g4c86114194e6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor372 state:D stack:23192 pid: 3620 ppid: 3616 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5183 [inline] __schedule+0x91f/0xdf0 kernel/sched/core.c:6495 schedule+0xcb/0x190 kernel/sched/core.c:6571 rwsem_down_write_slowpath+0xf1c/0x1350 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1553 filemap_invalidate_lock include/linux/fs.h:801 [inline] blkdev_fallocate+0x21f/0x390 block/fops.c:641 vfs_fallocate+0x515/0x670 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 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+0x63/0xcd RIP: 0033:0x7fd38a3d9e09 RSP: 002b:00007ffdf0659e18 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fd38a3d9e09 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0002000080000000 R11: 0000000000000246 R12: 00007fd38a39d5e0 R13: 0000000000000000 R14: 00007ffdf0659e40 R15: 00007ffdf0659e30 INFO: task syz-executor372:3637 blocked for more than 143 seconds. Not tainted 6.0.0-syzkaller-06475-g4c86114194e6 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor372 state:D stack:23192 pid: 3637 ppid: 3609 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5183 [inline] __schedule+0x91f/0xdf0 kernel/sched/core.c:6495 schedule+0xcb/0x190 kernel/sched/core.c:6571 rwsem_down_write_slowpath+0xf1c/0x1350 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1553 filemap_invalidate_lock include/linux/fs.h:801 [inline] blkdev_fallocate+0x21f/0x390 block/fops.c:641 vfs_fallocate+0x515/0x670 fs/open.c:323 ksys_fallocate fs/open.c:346 [inline] __do_sys_fallocate fs/open.c:354 [inline] __se_sys_fallocate fs/open.c:352 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:352 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+0x63/0xcd RIP: 0033:0x7fd38a3d9e09 RSP: 002b:00007ffdf0659e18 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fd38a3d9e09 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0002000080000000 R11: 0000000000000246 R12: 000000000000a7a3 R13: 00007ffdf0659e2c R14: 00007ffdf0659e40 R15: 00007ffdf0659e30 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cb21db0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cb225b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/29: #0: ffffffff8cb21be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by klogd/2964: 2 locks held by getty/3285: #0: ffff888026380098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 1 lock held by syz-executor372/3617: #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor372/3619: #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor372/3620: #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor372/3637: #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor372/3639: #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 1 lock held by syz-executor372/3646: #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801242a9c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21f/0x390 block/fops.c:641 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-syzkaller-06475-g4c86114194e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 nmi_cpu_backtrace+0x425/0x450 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xcd5/0xd20 kernel/hung_task.c:369 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2964 Comm: klogd Not tainted 6.0.0-syzkaller-06475-g4c86114194e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:cmpxchg_double_slab+0x12d/0x310 mm/slub.c:534 Code: 02 00 00 0f 84 90 00 00 00 fb e9 8a 00 00 00 41 8d 46 20 a8 0f 0f 85 64 01 00 00 4c 89 f9 4c 89 e8 4c 89 e2 f0 49 0f c7 4e 20 01 75 67 eb 69 49 8b 46 08 a8 01 0f 85 77 01 00 00 0f 1f 44 00 RSP: 0018:ffffc9000317f4b8 EFLAGS: 00000246 RAX: ffff88808d85a200 RBX: ffff88808d85b300 RCX: 0000000080070003 RDX: 0000000080070004 RSI: ffffea0002361600 RDI: ffff888145863b40 RBP: 0000000080070003 R08: ffff88808d85b300 R09: 0000000080070003 R10: ffffed1017348069 R11: 1ffff11017348068 R12: 0000000080070004 R13: ffff88808d85a200 R14: ffffea0002361600 R15: 0000000080070003 FS: 00007f6944832800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ce6e040990 CR3: 0000000026feb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __slab_free+0x95/0x280 mm/slub.c:3392 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] kmem_cache_alloc_node+0x1cc/0x350 mm/slub.c:3298 __alloc_skb+0xcf/0x2b0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1265 [inline] alloc_skb_with_frags+0xb4/0x780 net/core/skbuff.c:6124 sock_alloc_send_pskb+0x938/0xa70 net/core/sock.c:2719 unix_dgram_sendmsg+0x5ab/0x2010 net/unix/af_unix.c:1943 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x46e/0x5f0 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2125 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+0x63/0xcd RIP: 0033:0x7f69449ce0ac Code: 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 19 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 64 c3 0f 1f 00 55 48 83 ec 20 48 89 54 24 10 RSP: 002b:00007ffde4beed28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f69449ce0ac RDX: 000000000000003a RSI: 00005593dade5d70 RDI: 0000000000000003 RBP: 00005593dade1910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000014 R13: 0000000000000001 R14: 00007f6944b4977d R15: 00007ffde4beee38 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.215 msecs