------------[ cut here ]------------ WARNING: CPU: 1 PID: 3517 at net/can/isotp.c:853 isotp_tx_timer_handler+0xb47/0xed0 Modules linked in: CPU: 1 PID: 3517 Comm: modprobe Not tainted 5.15.106-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:isotp_tx_timer_handler+0xb47/0xed0 net/can/isotp.c:853 Code: 00 00 00 00 00 00 49 81 c5 a8 40 00 00 31 db 4c 89 ef be 01 00 00 00 ba 01 00 00 00 31 c9 e8 40 9e 2b f8 eb 57 e8 89 14 4c f8 <0f> 0b eb 4c e8 80 14 4c f8 eb 45 4c 8b 74 24 30 49 81 c6 a8 05 00 RSP: 0000:ffffc90000dd0b20 EFLAGS: 00010246 RAX: ffffffff8933a627 RBX: 0000000000000000 RCX: ffff888032da5700 RDX: 0000000000000101 RSI: ffffffff8db1c360 RDI: 0000000000000000 RBP: ffffc90000dd0c70 R08: 0000000000000005 R09: ffffffff89339bbb R10: 0000000000000003 R11: ffff888032da5700 R12: 0000000000000000 R13: ffff888078548570 R14: ffff88807854a5f4 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe7e5697440 CR3: 0000000042389000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x196/0x2c0 kernel/time/hrtimer.c:1766 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_count_add+0xc5/0x180 kernel/sched/core.c:5493 Code: 0c 00 65 48 8b 1d fb 7f ab 7e 48 81 c3 18 14 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 2e 13 72 00 4c 89 33 <5b> 41 5e 41 5f c3 e8 b0 a8 ab 02 85 c0 74 9e 48 c7 c0 88 4e e3 8d RSP: 0000:ffffc90006d1f730 EFLAGS: 00000246 RAX: 1ffff110065b4d63 RBX: ffff888032da6b18 RCX: ffffffff8a204800 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff81be1ab3 RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed100992a800 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000001 R14: ffffffff81be1ab3 R15: dffffc0000000000 kmap_atomic include/linux/highmem-internal.h:196 [inline] clear_highpage include/linux/highmem.h:180 [inline] kernel_init_free_pages+0x53/0xf0 mm/page_alloc.c:1278 post_alloc_hook+0x104/0x220 mm/page_alloc.c:2416 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_pages_vma+0x39a/0x800 mm/mempolicy.c:2146 do_anonymous_page mm/memory.c:3781 [inline] handle_pte_fault mm/memory.c:4592 [inline] __handle_mm_fault mm/memory.c:4729 [inline] handle_mm_fault+0x2f49/0x5950 mm/memory.c:4827 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline] handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0033:0x7ff2f5efc3b7 Code: 89 5c 24 20 be 01 00 00 00 48 89 54 24 18 ff 15 67 4a 02 00 48 89 c5 48 85 c0 0f 84 40 02 00 00 48 8b 54 24 18 4c 8b 5c 24 20 <48> 89 40 28 4c 89 e6 4c 8d 8c 10 88 04 00 00 4c 89 da 4c 89 88 d0 RSP: 002b:00007ffc911aaf50 EFLAGS: 00010206 RAX: 00007ff2f5eee000 RBX: 0000000000000000 RCX: 00007ff2f5eee4bd RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000000000000 RBP: 00007ff2f5eee000 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000015 R12: 0000557cbd573539 R13: 00007ff2f5f221e0 R14: 0000000000000014 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 0c 00 or $0x0,%al 2: 65 48 8b 1d fb 7f ab mov %gs:0x7eab7ffb(%rip),%rbx # 0x7eab8005 9: 7e a: 48 81 c3 18 14 00 00 add $0x1418,%rbx 11: 48 89 d8 mov %rbx,%rax 14: 48 c1 e8 03 shr $0x3,%rax 18: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 1d: 74 08 je 0x27 1f: 48 89 df mov %rbx,%rdi 22: e8 2e 13 72 00 callq 0x721355 27: 4c 89 33 mov %r14,(%rbx) * 2a: 5b pop %rbx <-- trapping instruction 2b: 41 5e pop %r14 2d: 41 5f pop %r15 2f: c3 retq 30: e8 b0 a8 ab 02 callq 0x2aba8e5 35: 85 c0 test %eax,%eax 37: 74 9e je 0xffffffd7 39: 48 c7 c0 88 4e e3 8d mov $0xffffffff8de34e88,%rax