================================================================== BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:986 [inline] BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1517 [inline] BUG: KASAN: use-after-free in __run_timers+0x5c4/0xd70 kernel/time/timer.c:1753 Write of size 8 at addr ffff0000eaff1a40 by task kworker/0:1/13 CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: rcu_gp process_srcu Call trace: dump_backtrace+0x0/0x458 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x158 mm/kasan/report.c:451 __asan_report_store8_noabort+0x44/0x50 mm/kasan/report_generic.c:314 hlist_move_list include/linux/list.h:986 [inline] collect_expired_timers kernel/time/timer.c:1517 [inline] __run_timers+0x5c4/0xd70 kernel/time/timer.c:1753 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780 handle_softirqs+0x344/0xbe4 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:457 [inline] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 irq_exit+0x14/0x88 kernel/softirq.c:683 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711 gic_handle_irq+0x78/0x1b8 drivers/irqchip/irq-gic-v3.c:765 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:903 do_interrupt_handler+0x6c/0x88 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0xa0/0x128 kernel/locking/spinlock.c:202 process_one_work+0x678/0x1138 kernel/workqueue.c:2283 worker_thread+0x8f4/0x1034 kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:856 The buggy address belongs to the page: page:00000000dd4ee724 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12aff1 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 0000000000000000 ffffffff03ab0201 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000eaff1900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000eaff1980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000eaff1a00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000eaff1a80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000eaff1b00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Unable to handle kernel paging request at virtual address dfff800000000038 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000038] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 13 Comm: kworker/0:1 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: rcu_gp process_srcu pstate: 424000c5 (nZcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : __queue_work+0x1c0/0x104c kernel/workqueue.c:1452 lr : __queue_work+0x118/0x104c kernel/workqueue.c:1448 sp : ffff800008007990 x29: ffff8000080079d0 x28: 1fffe0001812a001 x27: 0000000000000000 x26: 0000000000000008 x25: dfff800000000000 x24: 00000000000001c0 x23: 0000000000000038 x22: 0000000000000000 x21: 0000000000000008 x20: 0000000000000000 x19: ffff0000eaff17c0 x18: 0000000000000104 x17: 0000000000000000 x16: ffff800011251998 x15: 00000000ffffffff x14: ffff60001d5fe2f8 x13: 1fffe0001d5fe2f8 x12: 0000000000ff0100 x11: 0000000000000101 x10: 0000000000000000 x9 : ffff8000081e91d8 x8 : ffff0000c0950000 x7 : 0000000000000000 x6 : ffff800008383100 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000081e8fd8 x2 : ffff0000eaff17c0 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __queue_work+0x1c0/0x104c kernel/workqueue.c:1452 queue_work_on+0xc4/0x170 kernel/workqueue.c:1559 queue_work include/linux/workqueue.h:512 [inline] ieee80211_queue_work+0xb4/0x138 net/mac80211/util.c:924 ieee80211_ibss_timer+0x44/0x54 net/mac80211/ibss.c:1729 call_timer_fn+0x19c/0x850 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0xb2c/0xd70 kernel/time/timer.c:1767 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780 handle_softirqs+0x344/0xbe4 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:457 [inline] __irq_exit_rcu+0x240/0x43c kernel/softirq.c:659 irq_exit+0x14/0x88 kernel/softirq.c:683 handle_domain_irq+0x14c/0x1fc kernel/irq/irqdesc.c:711 gic_handle_irq+0x78/0x1b8 drivers/irqchip/irq-gic-v3.c:765 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:903 do_interrupt_handler+0x6c/0x88 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0xa0/0x128 kernel/locking/spinlock.c:202 process_one_work+0x678/0x1138 kernel/workqueue.c:2283 worker_thread+0x8f4/0x1034 kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:856 Code: 350055d7 940a50ca 91070378 d343ff17 (38f96ae8) ---[ end trace 7a30d607c900474c ]--- ---------------- Code disassembly (best guess): 0: 350055d7 cbnz w23, 0xab8 4: 940a50ca bl 0x29432c 8: 91070378 add x24, x27, #0x1c0 c: d343ff17 lsr x23, x24, #3 * 10: 38f96ae8 ldrsb w8, [x23, x25] <-- trapping instruction