watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz.2.409:8380] Modules linked in: irq event stamp: 5017 hardirqs last enabled at (5016): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (5016): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (5017): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (5017): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (98): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (106): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (106): [] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 CPU: 0 UID: 0 PID: 8380 Comm: syz.2.409 Tainted: G W 6.12.0-rc3-syzkaller-g9ec59cb3edc7 #0 Tainted: [W]=WARN 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 : preempt_count arch/arm64/include/asm/preempt.h:13 [inline] pc : check_kcov_mode kernel/kcov.c:183 [inline] pc : __sanitizer_cov_trace_pc+0x14/0x84 kernel/kcov.c:217 lr : xas_load+0x34/0x50c lib/xarray.c:237 sp : ffff80009edf7580 x29: ffff80009edf75d0 x28: 1ffff00013dbeee0 x27: 0000000000000000 x26: dfff800000000000 x25: dfff800000000000 x24: 0000000000000000 x23: dfff800000000000 x22: ffff700013dbeedc x21: ffff80009edf7700 x20: ffff80009edf7718 x19: ffff80009edf7700 x18: ffff80009edf74a0 x17: 000000000004059a x16: ffff800080588a40 x15: 0000000000000003 x14: 1ffff00013dbeee4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700013dbeee7 x10: 0000000000ff0100 x9 : 0000000000000201 x8 : ffff0000d8d2bc80 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : ffff80009edf7700 Call trace: preempt_count arch/arm64/include/asm/preempt.h:13 [inline] (P) check_kcov_mode kernel/kcov.c:183 [inline] (P) __sanitizer_cov_trace_pc+0x14/0x84 kernel/kcov.c:217 (P) xas_load+0x34/0x50c lib/xarray.c:237 (L) 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+0x74c/0x30d8 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: 8376 Comm: syz.2.409 Tainted: G W 6.12.0-rc3-syzkaller-g9ec59cb3edc7 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x15c/0xd00 kernel/locking/qspinlock.c:380 lr : queued_spin_lock_slowpath+0x168/0xd00 kernel/locking/qspinlock.c:380 sp : ffff80009ed875c0 x29: ffff80009ed87660 x28: 1fffe0001a4225b0 x27: 1ffff00013db0ec4 x26: dfff800000000000 x25: 1fffe0001a048002 x24: ffff80009ed875e0 x23: ffff80009ed87620 x22: ffff700013db0ebc x21: 0000000000000001 x20: 0000000000000001 x19: ffff0000d2112d80 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800080ac780c x15: 0000000000000001 x14: 1fffe0001a4225b0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001a4225b1 x10: 1fffe0001a4225b0 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff80008957f344 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008b5831fc x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: __cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) queued_spin_lock_slowpath+0x15c/0xd00 kernel/locking/qspinlock.c:380 (P) queued_spin_lock_slowpath+0x168/0xd00 kernel/locking/qspinlock.c:380 (L) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2ec/0x334 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x50/0x60 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_devmem_dontneed+0x1d8/0x5fc net/core/sock.c:1086 sk_setsockopt+0x74c/0x30d8 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