------------[ cut here ]------------ WARNING: CPU: 1 PID: 2374 at net/can/isotp.c:910 isotp_tx_timer_handler+0x110/0x130 net/can/isotp.c:910 Modules linked in: Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 2374 Comm: syz-fuzzer Not tainted 6.1.0-rc4-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: frame pointer underflow [<8173ade8>] (dump_backtrace) from [<8173aedc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253) r7:81cfb7ac r6:822228ec r5:60000193 r4:81d09b94 [<8173aec4>] (show_stack) from [<81756fb8>] (__dump_stack lib/dump_stack.c:88 [inline]) [<8173aec4>] (show_stack) from [<81756fb8>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<81756f70>] (dump_stack_lvl) from [<81756fdc>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:82448d14 [<81756fc4>] (dump_stack) from [<8173ba84>] (panic+0x11c/0x360 kernel/panic.c:274) [<8173b968>] (panic) from [<80241604>] (__warn+0x98/0x1a4 kernel/panic.c:621) r3:00000001 r2:00000000 r1:00000000 r0:81cfb7ac r7:815eaa08 [<8024156c>] (__warn) from [<8173bd30>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:644) r8:00000009 r7:815eaa08 r6:0000038e r5:81eb3830 r4:00000000 [<8173bccc>] (warn_slowpath_fmt) from [<815eaa08>] (isotp_tx_timer_handler+0x110/0x130 net/can/isotp.c:910) r8:000000a0 r7:dddde220 r6:dddde180 r5:86390278 r4:00000000 [<815ea8f8>] (isotp_tx_timer_handler) from [<802e70c0>] (__run_hrtimer kernel/time/hrtimer.c:1685 [inline]) [<815ea8f8>] (isotp_tx_timer_handler) from [<802e70c0>] (__hrtimer_run_queues+0x1b0/0x46c kernel/time/hrtimer.c:1749) r5:dddde260 r4:86380278 [<802e6f10>] (__hrtimer_run_queues) from [<802e7408>] (hrtimer_run_softirq+0x8c/0xb8 kernel/time/hrtimer.c:1766) r10:831fd080 r9:00000100 r8:00000100 r7:00000000 r6:00000000 r5:20000113 r4:dddde180 [<802e737c>] (hrtimer_run_softirq) from [<8020133c>] (__do_softirq+0x16c/0x498 kernel/softirq.c:571) r7:dfac1fb0 r6:00000008 r5:00000009 r4:822040a0 [<802011d0>] (__do_softirq) from [<80249f48>] (invoke_softirq kernel/softirq.c:445 [inline]) [<802011d0>] (__do_softirq) from [<80249f48>] (__irq_exit_rcu kernel/softirq.c:650 [inline]) [<802011d0>] (__do_softirq) from [<80249f48>] (__irq_exit_rcu kernel/softirq.c:640 [inline]) [<802011d0>] (__do_softirq) from [<80249f48>] (irq_exit+0x9c/0xe8 kernel/softirq.c:674) r10:064121e0 r9:00000000 r8:00000000 r7:dfac1fb0 r6:81ebdb04 r5:81ebdb1c r4:820aaa00 [<80249eac>] (irq_exit) from [<81757178>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:240) r5:81ebdb1c r4:820aa9dc [<817570fc>] (generic_handle_arch_irq) from [<8170e5fc>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40) r9:00000000 r8:820a2044 r7:831fd080 r6:ffffffff r5:80000010 r4:00098f24 [<8170e5e0>] (call_with_stack) from [<80200e74>] (__irq_usr+0x74/0x80 arch/arm/kernel/entry-armv.S:436) Exception stack(0xdfac1fb0 to 0xdfac1ff8) 1fa0: 00c0f93c 00000002 00c0f93c 00000001 1fc0: 00000000 00000001 00000002 00000001 0a37c6b6 00000000 064121e0 00000005 1fe0: 00000020 0215b61c 00012430 00098f24 80000010 ffffffff Rebooting in 86400 seconds..