kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor.4:4826]
Modules linked in:
CPU: 1 PID: 4826 Comm: syz-executor.4 Tainted: G        W         5.10.210-syzkaller-00394-g70b6ab09a34b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x278/0x510 kernel/smp.c:517
Code: 0f 85 18 02 00 00 44 8b 6c 24 48 44 89 ee 83 e6 01 31 ff e8 7a f0 0a 00 41 83 e5 01 75 0a e8 bf ec 0a 00 e9 eb 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 15 f7 44 24 48 01 00 00 00 0f 84 cd 00 00
RSP: 0018:ffffc900010875c0 EFLAGS: 00000246
RAX: ffffffff815fbd64 RBX: 1ffff92000210ec1 RCX: 0000000000040000
RDX: ffffc90001f19000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900010876b0 R08: ffffffff815fbd36 R09: ffffed103ee0aec9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90001087608 R15: 0000000000000000
FS:  00007fd38ee396c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffff7000000 CR3: 000000012694f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 smp_call_function_many_cond+0x94e/0xa30 kernel/smp.c:653
 on_each_cpu_cond_mask+0xc1/0x200 kernel/smp.c:904
 on_each_cpu_cond+0x34/0x40 kernel/smp.c:919
 invalidate_bh_lrus+0x23/0x30 fs/buffer.c:1460
 kill_bdev fs/block_dev.c:85 [inline]
 set_blocksize+0x348/0x3c0 fs/block_dev.c:171
 sb_set_blocksize+0x4a/0xf0 fs/block_dev.c:180
 ext4_fill_super+0x3490/0x9150 fs/ext4/super.c:4463
 mount_bdev+0x262/0x370 fs/super.c:1429
 ext4_mount+0x34/0x40 fs/ext4/super.c:6626
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1559
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2910
 path_mount+0x56f/0xcb0 fs/namespace.c:3240
 do_mount fs/namespace.c:3253 [inline]
 __do_sys_mount fs/namespace.c:3461 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3438
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3438
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fd3900c75aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd38ee38ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd38ee38f80 RCX: 00007fd3900c75aa
RDX: 0000000020000100 RSI: 0000000020000180 RDI: 00007fd38ee38f40
RBP: 0000000020000100 R08: 00007fd38ee38f80 R09: 0000000003208012
R10: 0000000003208012 R11: 0000000000000202 R12: 0000000020000180
R13: 00007fd38ee38f40 R14: 0000000000000551 R15: 0000000020000300
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4829 Comm: syz-executor.2 Tainted: G        W         5.10.210-syzkaller-00394-g70b6ab09a34b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline]
RIP: 0010:kvm_wait+0xec/0x150 arch/x86/kernel/kvm.c:921
Code: 03 42 0f b6 04 20 84 c0 75 6a 41 0f b6 45 00 44 38 f0 75 26 41 f7 c7 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 65 4e d5 03 f4 <eb> 0e 0f 1f 44 00 00 0f 00 2d 56 4e d5 03 fb f4 4c 89 7c 24 18 ff
RSP: 0018:ffffc90000d56bc0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 1ffff920001aad7c RCX: ffffffff8150b5a4
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffc90000d56c00
RBP: ffffc90000d56c70 R08: dffffc0000000000 R09: ffffed102469b001
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881234d8000 R14: 0000000000000003 R15: 0000000000000046
FS:  00007f2a6a46b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffff7000000 CR3: 0000000123673000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72f/0xc70 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock_flags include/linux/spinlock.h:195 [inline]
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irqsave+0x1a0/0x210 kernel/locking/spinlock.c:159
 force_sig_info_to_task+0x67/0x320 kernel/signal.c:1320
 force_sig_fault_to_task kernel/signal.c:1684 [inline]
 force_sig_fault+0x125/0x1c0 kernel/signal.c:1691
 no_context+0x2e1/0xf20 arch/x86/mm/fault.c:672
 __bad_area_nosemaphore+0xcd/0x440 arch/x86/mm/fault.c:848
 bad_area_nosemaphore+0x2d/0x40 arch/x86/mm/fault.c:855
 do_kern_addr_fault+0x69/0x80 arch/x86/mm/fault.c:1220
 handle_page_fault arch/x86/mm/fault.c:1460 [inline]
 exc_page_fault+0x399/0x5b0 arch/x86/mm/fault.c:1518
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0010:strncpy_from_kernel_nofault+0x1c2/0x1e0 mm/maccess.c:84
Code: c1 7c 9c 48 8b 7d c8 e8 bc 8f 17 00 48 8b 75 c8 48 8b 55 d0 eb 89 89 f9 80 e1 07 38 c1 7c 96 e8 04 90 17 00 48 8b 55 d0 eb 8b <e8> a9 0f da ff 48 c7 c3 f2 ff ff ff e9 45 ff ff ff 66 2e 0f 1f 84
RSP: 0018:ffffc90000d57308 EFLAGS: 00010046
RAX: 0000000000000000 RBX: fffffffff7000000 RCX: ffff88810e8762c0
RDX: ffffc90000d573a8 RSI: fffffffff7000000 RDI: fffffffff7000000
RBP: ffffc90000d57350 R08: ffffffff81332166 R09: ffffed1021d0ec59
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: fffffffff7000000 R14: dffffc0000000000 R15: 0000000000000001
 bpf_probe_read_kernel_str_common kernel/trace/bpf_trace.c:252 [inline]
 ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:300 [inline]
 bpf_probe_read_compat_str+0x112/0x180 kernel/trace/bpf_trace.c:293
 bpf_prog_f89a0e08be5f5522+0x3d/0xa84
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2061 [inline]
 bpf_trace_run4+0x13e/0x2e0 kernel/trace/bpf_trace.c:2100
 __bpf_trace_mm_page_alloc+0xbf/0xf0 include/trace/events/kmem.h:193
 trace_mm_page_alloc include/trace/events/kmem.h:193 [inline]
 __alloc_pages_nodemask+0xa8e/0xaf0 mm/page_alloc.c:5374
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x1b9/0x2e0 mm/slub.c:2960
 __sigqueue_alloc+0x19e/0x2f0 kernel/signal.c:438
 __send_signal+0x1e6/0xb90 kernel/signal.c:1119
 send_signal+0x4c1/0x5e0 kernel/signal.c:1245
 force_sig_info_to_task+0x272/0x320 kernel/signal.c:1337
 force_sig_fault_to_task kernel/signal.c:1684 [inline]
 force_sig_fault+0x125/0x1c0 kernel/signal.c:1691
 no_context+0x2e1/0xf20 arch/x86/mm/fault.c:672
 __bad_area_nosemaphore+0xcd/0x440 arch/x86/mm/fault.c:848
 __bad_area arch/x86/mm/fault.c:869 [inline]
 bad_area+0x69/0x80 arch/x86/mm/fault.c:875
 handle_page_fault arch/x86/mm/fault.c:1462 [inline]
 exc_page_fault+0x439/0x5b0 arch/x86/mm/fault.c:1518
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0010:__put_user_nocheck_8+0x11/0x21
Code: 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 14 0f 01 cb 48 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 <0f> 01 ca b9 f2 ff ff ff c3 cc cc cc cc cc cc cc 55 48 89 e5 41 57
RSP: 0018:ffffc90000d57d98 EFLAGS: 00050283
RAX: 00000000773596c0 RBX: 00007fffffffeff9 RCX: 0000000000000019
RDX: ffffc90001a7d000 RSI: 0000000000000aab RDI: 0000000000000aac
RBP: ffffc90000d57e48 R08: ffffffff815b6014 R09: ffffc90000d57de0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d57de0
R13: dffffc0000000000 R14: 1ffff920001aafb8 R15: 0000000000000019
 emulate_vsyscall+0xe33/0x13d0 arch/x86/entry/vsyscall/vsyscall_64.c:246
 do_user_addr_fault arch/x86/mm/fault.c:1309 [inline]
 handle_page_fault arch/x86/mm/fault.c:1462 [inline]
 exc_page_fault+0x147/0x5b0 arch/x86/mm/fault.c:1518
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0033:_end+0x783da000/0x0
Code: Unable to access opcode bytes at RIP 0xffffffffff5fffd6.
RSP: 002b:00007f2a6a46ab38 EFLAGS: 00010246
RAX: ffffffffffffffda RBX: 00007f2a6b825f80 RCX: 00007f2a6b6f7ea9
RDX: 00007f2a6a46ab40 RSI: 00007f2a6a46ac70 RDI: 0000000000000019
RBP: 00007f2a6b7444a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2a6b825f80 R15: 00007ffd6fc12368