watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz.5.220:8117] Modules linked in: irq event stamp: 6045 hardirqs last enabled at (6044): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (6044): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (6045): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (6045): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (160): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (168): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (168): [] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 CPU: 0 UID: 0 PID: 8117 Comm: syz.5.220 Not tainted 6.12.0-rc6-syzkaller-g563047e691f2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __sanitizer_cov_trace_const_cmp8+0x0/0x98 kernel/kcov.c:320 lr : xas_start+0x78/0x6c4 lib/xarray.c:187 sp : ffff80009d8b7540 x29: ffff80009d8b7540 x28: 1ffff00013b16ee0 x27: 0000000000000000 x26: dfff800000000000 x25: 1ffff00013b16ee3 x24: dfff800000000000 x23: 0000000000000000 x22: 0000000000000003 x21: ffff80009d8b7718 x20: ffff80009d8b7700 x19: 0000000000000003 x18: ffff80009d8b74a0 x17: 0000000000034ea0 x16: ffff80008058695c x15: 0000000000000003 x14: 1ffff00013b16ee4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700013b16ee7 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000ca635ac0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __sanitizer_cov_trace_const_cmp8+0x0/0x98 kernel/kcov.c:316 (P) xas_start+0x78/0x6c4 lib/xarray.c:187 (L) xas_load+0x3c/0x50c lib/xarray.c:238 xas_store+0x94/0x1470 lib/xarray.c:790 __xa_erase+0x11c/0x1e0 lib/xarray.c:1511 sock_devmem_dontneed+0x2a0/0x5fc net/core/sock.c:1089 sk_setsockopt+0x7b4/0x3150 net/core/sock.c:1280 sock_setsockopt+0x68/0x80 net/core/sock.c:1633 do_sock_setsockopt+0x238/0x4e0 net/socket.c:2330 __sys_setsockopt+0x128/0x1a8 net/socket.c:2357 __do_sys_setsockopt net/socket.c:2366 [inline] __se_sys_setsockopt net/socket.c:2363 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2363 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6734 Comm: kworker/u8:7 Not tainted 6.12.0-rc6-syzkaller-g563047e691f2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_unbound toggle_allocation_gate pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:340 [inline] pc : smp_call_function_many_cond+0x1a9c/0x3418 kernel/smp.c:884 lr : csd_lock_wait kernel/smp.c:340 [inline] lr : smp_call_function_many_cond+0x1ab4/0x3418 kernel/smp.c:884 sp : ffff8000a32e7790 x29: ffff8000a32e78d0 x28: ffffffffffffffff x27: 1fffe000366ce151 x26: ffff0001b3652da8 x25: 0000000000000000 x24: dfff800000000000 x23: 0000000000000008 x22: 0000000000000011 x21: 1fffe000366ce150 x20: ffff0001b3670a88 x19: ffff0001b3670a80 x18: 1fffe000366cb476 x17: ffff80008f80d000 x16: ffff8000830cb670 x15: 0000000000000001 x14: 1fffe000366ca5b5 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000366ca5b6 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff800080061d44 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000804d67cc x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:231 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) csd_lock_wait kernel/smp.c:340 [inline] (P) smp_call_function_many_cond+0x1a9c/0x3418 kernel/smp.c:884 (P) csd_lock_wait kernel/smp.c:340 [inline] (L) smp_call_function_many_cond+0x1ab4/0x3418 kernel/smp.c:884 (L) smp_call_function_many kernel/smp.c:908 [inline] smp_call_function kernel/smp.c:930 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1075 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x30c/0x334 kernel/jump_label.c:521 jump_label_update+0x30c/0x3bc kernel/jump_label.c:920 static_key_enable_cpuslocked+0x140/0x230 kernel/jump_label.c:210 static_key_enable+0x24/0x38 kernel/jump_label.c:223 toggle_allocation_gate+0xc4/0x264 mm/kfence/core.c:849 process_one_work+0x7bc/0x1600 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3391 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862