ci2 starts bisection 2025-04-11 03:32:29.911426424 +0000 UTC m=+40861.260509092 bisecting fixing commit since ccc915784332a8717d3fef84283c416c0e57d3d6 building syzkaller on 429ea00719313e5b518a2093a9f48c79bb7b5f52 ensuring issue is reproducible on original commit ccc915784332a8717d3fef84283c416c0e57d3d6 testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b0ac2f108b9d14d95a50987fa75f10a93e1c033637d615d46125bb0f50b82d08 run #0: crashed: KASAN: use-after-free Write in enqueue_timer run #1: crashed: KASAN: use-after-free Write in __run_timers run #2: crashed: KASAN: use-after-free Write in __run_timers run #3: crashed: KASAN: use-after-free Write in __run_timers run #4: crashed: KASAN: use-after-free Write in enqueue_timer run #5: crashed: KASAN: use-after-free Write in __run_timers run #6: crashed: KASAN: use-after-free Write in __run_timers run #7: crashed: KASAN: use-after-free Write in enqueue_timer run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in enqueue_timer run #10: crashed: KASAN: use-after-free Write in enqueue_timer run #11: crashed: KASAN: use-after-free Write in enqueue_timer run #12: crashed: KASAN: use-after-free Write in __run_timers run #13: crashed: KASAN: use-after-free Write in __run_timers run #14: crashed: KASAN: use-after-free Write in enqueue_timer run #15: crashed: KASAN: use-after-free Write in __run_timers run #16: crashed: KASAN: use-after-free Write in enqueue_timer run #17: crashed: KASAN: use-after-free Write in __run_timers run #18: crashed: KASAN: use-after-free Write in __run_timers run #19: crashed: KASAN: use-after-free Write in __run_timers representative crash: KASAN: use-after-free Write in enqueue_timer, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a82cb076c961a739d4009b56d620d90cc6fb5528f6c42aca9ab02e1a572c587a run #0: crashed: KASAN: use-after-free Write in __run_timers run #1: crashed: KASAN: use-after-free Write in __run_timers run #2: crashed: KASAN: use-after-free Write in enqueue_timer run #3: crashed: KASAN: use-after-free Write in enqueue_timer run #4: crashed: KASAN: use-after-free Write in enqueue_timer run #5: crashed: KASAN: use-after-free Write in enqueue_timer run #6: crashed: KASAN: use-after-free Write in enqueue_timer run #7: crashed: KASAN: use-after-free Write in __run_timers run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in enqueue_timer representative crash: KASAN: use-after-free Write in __run_timers, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed kconfig minimization: base=5179 full=6548 leaves diff=264 split chunks (needed=false): <264> split chunk #0 of len 264 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b4bb06ade50a989562029edc08f6753d8a58c4dd6292535fd3b7b7260f0f8dd6 run #0: crashed: KASAN: use-after-free Write in __run_timers run #1: crashed: KASAN: use-after-free Write in enqueue_timer run #2: crashed: KASAN: use-after-free Write in enqueue_timer run #3: crashed: KASAN: use-after-free Write in enqueue_timer run #4: crashed: KASAN: use-after-free Write in enqueue_timer run #5: crashed: KASAN: use-after-free Write in __run_timers run #6: crashed: KASAN: use-after-free Write in __run_timers run #7: crashed: KASAN: use-after-free Write in enqueue_timer run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in __run_timers representative crash: KASAN: use-after-free Write in __run_timers, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2a6eb7a6bfeeaeea391c9ecbe9e41cefeb10c83f98713d29f7353d5e9b573f61 run #0: crashed: KASAN: use-after-free Write in __run_timers run #1: crashed: KASAN: use-after-free Write in enqueue_timer run #2: crashed: KASAN: use-after-free Write in enqueue_timer run #3: crashed: KASAN: use-after-free Write in enqueue_timer run #4: crashed: KASAN: use-after-free Write in detach_if_pending run #5: crashed: KASAN: use-after-free Write in enqueue_timer run #6: crashed: KASAN: use-after-free Write in enqueue_timer run #7: crashed: KASAN: use-after-free Write in __run_timers run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in enqueue_timer representative crash: KASAN: use-after-free Write in __run_timers, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5c319924a471a6c70ee86520dec544efa28a121e5efc3cd8311d13a2f4f4402f run #0: crashed: KASAN: use-after-free Write in enqueue_timer run #1: crashed: KASAN: use-after-free Write in enqueue_timer run #2: crashed: KASAN: use-after-free Write in enqueue_timer run #3: crashed: KASAN: use-after-free Write in enqueue_timer run #4: crashed: KASAN: use-after-free Write in enqueue_timer run #5: crashed: KASAN: use-after-free Write in __run_timers run #6: crashed: KASAN: use-after-free Write in enqueue_timer run #7: crashed: KASAN: use-after-free Write in __run_timers run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in enqueue_timer representative crash: KASAN: use-after-free Write in enqueue_timer, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 007bf317d72d6b4fdfbd8403b3a789a4399a1925030eb3cc8c48482f3de668d1 run #0: crashed: KASAN: use-after-free Write in __run_timers run #1: crashed: KASAN: use-after-free Write in enqueue_timer run #2: crashed: KASAN: use-after-free Write in enqueue_timer run #3: crashed: KASAN: use-after-free Write in enqueue_timer run #4: crashed: KASAN: use-after-free Write in __run_timers run #5: crashed: KASAN: use-after-free Write in enqueue_timer run #6: crashed: KASAN: use-after-free Write in enqueue_timer run #7: crashed: KASAN: use-after-free Write in __run_timers run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in __run_timers representative crash: KASAN: use-after-free Write in __run_timers, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit ccc915784332a8717d3fef84283c416c0e57d3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 failed building ccc915784332a8717d3fef84283c416c0e57d3d6: net/socket.c:1245: undefined reference to `wext_handle_ioctl' net/socket.c:3447: undefined reference to `compat_wext_handle_ioctl' net/core/net-procfs.c:329: undefined reference to `wext_proc_init' net/core/net-procfs.c:345: undefined reference to `wext_proc_exit' minimized to 52 configs; suspects: [HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS X86_X32_ABI ZEROPLUS_FF] disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN BUG LOCKDEP], they are not needed testing current HEAD 6bd3b482a8f12750b4297426b502b735e140d8c8 testing commit 6bd3b482a8f12750b4297426b502b735e140d8c8 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 99a1f8e75cdb161b708e3676a8f6929e0678da6d374018cac04351b5ecd01ffd run #0: crashed: KASAN: use-after-free Write in __run_timers run #1: crashed: KASAN: use-after-free Write in enqueue_timer run #2: crashed: KASAN: use-after-free Write in enqueue_timer run #3: crashed: KASAN: use-after-free Write in enqueue_timer run #4: crashed: KASAN: use-after-free Write in enqueue_timer run #5: crashed: KASAN: use-after-free Write in __run_timers run #6: crashed: KASAN: use-after-free Write in enqueue_timer run #7: crashed: KASAN: use-after-free Write in enqueue_timer run #8: crashed: KASAN: use-after-free Write in enqueue_timer run #9: crashed: KASAN: use-after-free Write in __run_timers representative crash: KASAN: use-after-free Write in __run_timers, types: [KASAN] crash still not fixed/happens on the oldest tested release revisions tested: 7, total time: 1h7m41.653883255s (build: 26m3.40739675s, test: 35m32.087120728s) crash still not fixed or there were kernel test errors commit msg: ANDROID: sched: Reapply reverted portions of "sched/core: Prevent race condition between cpuset and __sched_setscheduler()" crash: KASAN: use-after-free Write in __run_timers ================================================================== BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:1014 [inline] BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1576 [inline] BUG: KASAN: use-after-free in __run_timers+0x2aa/0x700 kernel/time/timer.c:1812 Write of size 8 at addr ffff888119880a00 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.129-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x105/0x148 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:356 hlist_move_list include/linux/list.h:1014 [inline] collect_expired_timers kernel/time/timer.c:1576 [inline] __run_timers+0x2aa/0x700 kernel/time/timer.c:1812 run_timer_softirq+0x45/0x80 kernel/time/timer.c:1839 handle_softirqs+0x1d2/0x5f0 kernel/softirq.c:624 __do_softirq kernel/softirq.c:662 [inline] invoke_softirq kernel/softirq.c:479 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:711 irq_exit_rcu+0x9/0x10 kernel/softirq.c:723 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] RIP: 0010:acpi_idle_do_entry drivers/acpi/processor_idle.c:567 [inline] RIP: 0010:acpi_idle_enter+0x2b5/0x5f0 drivers/acpi/processor_idle.c:704 Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 d3 80 7f fd 48 f7 03 08 00 00 00 0f 85 d9 00 00 00 66 90 0f 00 2d 4d 1b c9 00 fb f4 e9 c8 00 00 00 49 83 c7 04 4c 89 f8 48 c1 e8 03 48 be 00 00 00 RSP: 0018:ffffffff85607bf0 EFLAGS: 00000246 RAX: 1ffffffff0ac39b8 RBX: ffffffff8561cdc0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8561cdc0 RBP: ffffffff85607c30 R08: dffffc0000000000 R09: fffffbfff0ac39b9 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888109819000 R13: ffff888109ba3004 R14: 0000000000000001 R15: ffff888109819064 cpuidle_enter_state+0x3e6/0xf00 drivers/cpuidle/cpuidle.c:251 cpuidle_enter+0x5a/0x90 drivers/cpuidle/cpuidle.c:369 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3d1/0x580 kernel/sched/idle.c:303 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:401 rest_init+0x10b/0x130 init/main.c:731 arch_call_rest_init+0xe/0xe init/main.c:891 start_kernel+0x399/0x3cc init/main.c:1138 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:555 x86_64_start_kernel+0x7c/0x81 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0xce/0xdb Allocated by task 483: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:938 [inline] __kmalloc+0xaa/0x1a0 mm/slab_common.c:951 kmalloc include/linux/slab.h:568 [inline] kzalloc include/linux/slab.h:699 [inline] hci_alloc_dev_priv+0x1d/0x1bf0 net/bluetooth/hci_core.c:2435 hci_alloc_dev include/net/bluetooth/hci_core.h:1484 [inline] hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:636 [inline] hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:712 [inline] hci_uart_tty_ioctl+0x114/0x8e0 drivers/bluetooth/hci_ldisc.c:765 tty_ioctl+0x47f/0x8a0 drivers/tty/tty_io.c:2785 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xc7/0x110 fs/ioctl.c:856 __x64_sys_ioctl+0x76/0x80 fs/ioctl.c:856 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 498: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1745 [inline] slab_free_freelist_hook mm/slub.c:1771 [inline] slab_free mm/slub.c:3686 [inline] __kmem_cache_free+0x1fa/0x3c0 mm/slub.c:3702 kfree+0x7a/0xf0 mm/slab_common.c:990 hci_release_dev+0x12fc/0x1440 net/bluetooth/hci_core.c:2763 bt_host_release+0x5f/0x70 net/bluetooth/hci_sysfs.c:85 device_release+0x91/0x140 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0xfc/0x140 lib/kobject.c:729 put_device+0xe/0x10 drivers/base/core.c:3805 hci_dev_put include/net/bluetooth/hci_core.h:1444 [inline] hci_dev_cmd+0x628/0x910 net/bluetooth/hci_core.c:795 hci_sock_ioctl+0x213/0x5b0 net/bluetooth/hci_sock.c:1096 sock_do_ioctl+0x144/0x3b0 net/socket.c:1194 sock_ioctl+0x3ad/0x580 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xc7/0x110 fs/ioctl.c:856 __x64_sys_ioctl+0x76/0x80 fs/ioctl.c:856 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 insert_work+0x4d/0x270 kernel/workqueue.c:1368 __queue_work+0x7a6/0x9f0 kernel/workqueue.c:1527 queue_work_on+0x11c/0x130 kernel/workqueue.c:1555 queue_work include/linux/workqueue.h:510 [inline] hci_cmd_sync_run net/bluetooth/hci_sync.c:140 [inline] __hci_cmd_sync_sk+0xa5b/0xdb0 net/bluetooth/hci_sync.c:162 __hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:253 [inline] __hci_cmd_sync_status net/bluetooth/hci_sync.c:277 [inline] hci_cmd_sync_status+0x50/0x110 net/bluetooth/hci_sync.c:288 hci_dev_cmd+0x4bd/0x910 net/bluetooth/hci_core.c:-1 hci_sock_ioctl+0x213/0x5b0 net/bluetooth/hci_sock.c:1096 sock_do_ioctl+0x144/0x3b0 net/socket.c:1194 sock_ioctl+0x3ad/0x580 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xc7/0x110 fs/ioctl.c:856 __x64_sys_ioctl+0x76/0x80 fs/ioctl.c:856 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 insert_work+0x4d/0x270 kernel/workqueue.c:1368 __queue_work+0x7a6/0x9f0 kernel/workqueue.c:1527 queue_work_on+0x11c/0x130 kernel/workqueue.c:1555 queue_work include/linux/workqueue.h:510 [inline] hci_cmd_sync_run net/bluetooth/hci_sync.c:140 [inline] __hci_cmd_sync_sk+0xa5b/0xdb0 net/bluetooth/hci_sync.c:162 __hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:253 [inline] __hci_cmd_sync_status net/bluetooth/hci_sync.c:277 [inline] hci_cmd_sync_status+0x50/0x110 net/bluetooth/hci_sync.c:288 hci_dev_cmd+0x4bd/0x910 net/bluetooth/hci_core.c:-1 hci_sock_ioctl+0x213/0x5b0 net/bluetooth/hci_sock.c:1096 sock_do_ioctl+0x144/0x3b0 net/socket.c:1194 sock_ioctl+0x3ad/0x580 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xc7/0x110 fs/ioctl.c:856 __x64_sys_ioctl+0x76/0x80 fs/ioctl.c:856 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888119880000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 2560 bytes inside of 8192-byte region [ffff888119880000, ffff888119882000) The buggy address belongs to the physical page: page:ffffea0004662000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x119880 head:ffffea0004662000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043500 raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 136, tgid 136 (dhcpcd), ts 5067027447, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook mm/page_alloc.c:2637 [inline] prep_new_page+0x512/0x5e0 mm/page_alloc.c:2644 get_page_from_freelist+0x3b46/0x3bc0 mm/page_alloc.c:4539 __alloc_pages+0x234/0x610 mm/page_alloc.c:5837 alloc_slab_page+0x6c/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1962 [inline] new_slab+0x7b/0x370 mm/slub.c:2015 ___slab_alloc+0x611/0x9a0 mm/slub.c:3203 __slab_alloc+0x52/0x90 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node_track_caller+0x97/0x180 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x170/0x700 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1290 [inline] netlink_dump+0x1bd/0xc10 net/netlink/af_netlink.c:2195 netlink_recvmsg+0x582/0xf60 net/netlink/af_netlink.c:1942 ____sys_recvmsg+0x263/0x450 net/socket.c:-1 ___sys_recvmsg+0x4c1/0x6e0 net/socket.c:2770 __sys_recvmsg net/socket.c:2800 [inline] __do_sys_recvmsg net/socket.c:2810 [inline] __se_sys_recvmsg net/socket.c:2807 [inline] __x64_sys_recvmsg+0x18d/0x210 net/socket.c:2807 x64_sys_call+0x171/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:48 page_owner free stack trace missing Memory state around the buggy address: ffff888119880900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888119880980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888119880a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888119880a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888119880b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 6.1.129-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__queue_work+0x43d/0x9f0 kernel/workqueue.c:-1 Code: 89 df e8 66 07 62 00 48 8b 45 88 48 39 03 74 34 48 8b 7d 98 e8 54 a2 e2 02 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 35 07 62 00 49 8b 7d 00 e8 0c 9b e2 RSP: 0018:ffffc90000007c98 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 000000007fffffff RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881198809c8 RBP: ffffc90000007d28 R08: dffffc0000000000 R09: 0000000000000007 R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000008 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881198809c8 FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c005e16000 CR3: 000000011bdf4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: delayed_work_timer_fn+0x5c/0x80 kernel/workqueue.c:1653 call_timer_fn+0x28/0x180 kernel/time/timer.c:1510 expire_timers kernel/time/timer.c:1550 [inline] __run_timers+0x5b2/0x700 kernel/time/timer.c:1826 run_timer_softirq+0x45/0x80 kernel/time/timer.c:1839 handle_softirqs+0x1d2/0x5f0 kernel/softirq.c:624 __do_softirq kernel/softirq.c:662 [inline] invoke_softirq kernel/softirq.c:479 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:711 irq_exit_rcu+0x9/0x10 kernel/softirq.c:723 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] RIP: 0010:acpi_idle_do_entry drivers/acpi/processor_idle.c:567 [inline] RIP: 0010:acpi_idle_enter+0x2b5/0x5f0 drivers/acpi/processor_idle.c:704 Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 d3 80 7f fd 48 f7 03 08 00 00 00 0f 85 d9 00 00 00 66 90 0f 00 2d 4d 1b c9 00 fb f4 e9 c8 00 00 00 49 83 c7 04 4c 89 f8 48 c1 e8 03 48 be 00 00 00 RSP: 0018:ffffffff85607bf0 EFLAGS: 00000246 RAX: 1ffffffff0ac39b8 RBX: ffffffff8561cdc0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8561cdc0 RBP: ffffffff85607c30 R08: dffffc0000000000 R09: fffffbfff0ac39b9 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888109819000 R13: ffff888109ba3004 R14: 0000000000000001 R15: ffff888109819064 cpuidle_enter_state+0x3e6/0xf00 drivers/cpuidle/cpuidle.c:251 cpuidle_enter+0x5a/0x90 drivers/cpuidle/cpuidle.c:369 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3d1/0x580 kernel/sched/idle.c:303 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:401 rest_init+0x10b/0x130 init/main.c:731 arch_call_rest_init+0xe/0xe init/main.c:891 start_kernel+0x399/0x3cc init/main.c:1138 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:555 x86_64_start_kernel+0x7c/0x81 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0xce/0xdb Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__queue_work+0x43d/0x9f0 kernel/workqueue.c:-1 Code: 89 df e8 66 07 62 00 48 8b 45 88 48 39 03 74 34 48 8b 7d 98 e8 54 a2 e2 02 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 35 07 62 00 49 8b 7d 00 e8 0c 9b e2 RSP: 0018:ffffc90000007c98 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 000000007fffffff RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881198809c8 RBP: ffffc90000007d28 R08: dffffc0000000000 R09: 0000000000000007 R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000008 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881198809c8 FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c005e16000 CR3: 000000011bdf4000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: df 80 3c 08 00 74 filds 0x7400083c(%rax) 6: 08 48 89 or %cl,-0x77(%rax) 9: df e8 fucomip %st(0),%st b: d3 80 7f fd 48 f7 roll %cl,-0x8b70281(%rax) 11: 03 08 add (%rax),%ecx 13: 00 00 add %al,(%rax) 15: 00 0f add %cl,(%rdi) 17: 85 d9 test %ebx,%ecx 19: 00 00 add %al,(%rax) 1b: 00 66 90 add %ah,-0x70(%rsi) 1e: 0f 00 2d 4d 1b c9 00 verw 0xc91b4d(%rip) # 0xc91b72 25: fb sti 26: f4 hlt * 27: fa cli <-- trapping instruction 28: e9 c8 00 00 00 jmp 0xf5 2d: 49 83 c7 04 add $0x4,%r15 31: 4c 89 f8 mov %r15,%rax 34: 48 c1 e8 03 shr $0x3,%rax 38: 48 rex.W 39: be .byte 0xbe 3a: 00 00 add %al,(%rax)