------------[ cut here ]------------ WARNING: CPU: 0 PID: 20524 at net/can/isotp.c:841 isotp_tx_timer_handler+0x719/0xcc0 net/can/isotp.c:841 Modules linked in: CPU: 0 PID: 20524 Comm: syz-executor.0 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:isotp_tx_timer_handler+0x719/0xcc0 net/can/isotp.c:841 Code: 44 0f b6 25 98 9c 49 05 31 ff 44 89 e6 e8 bf 3b 67 f9 45 84 e4 0f 85 9d fa ff ff e9 36 57 19 01 40 84 ed 75 52 e8 67 35 67 f9 <0f> 0b 45 31 e4 e8 5d 35 67 f9 48 8b 74 24 40 48 b8 00 00 00 00 00 RSP: 0018:ffffc90000007d50 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880785d0520 RCX: 0000000000000100 RDX: ffff888076bd3880 RSI: ffffffff880e7399 RDI: 0000000000000003 RBP: 0000000000000000 R08: ffffffff8a9ee780 R09: ffffffff880e6d2e R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880b9c42680 R14: ffff8880b9c42400 R15: ffffffff880e6c80 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0063) knlGS:00000000f55aeb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c0149bc000 CR3: 00000000377f5000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__might_sleep+0xa/0x160 kernel/sched/core.c:9075 Code: c7 c7 80 f1 60 8b e8 a5 61 6c 00 e9 87 fe ff ff e8 8b 61 6c 00 e9 ec fe ff ff 66 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df <41> 55 41 89 d5 41 54 41 89 f4 55 48 89 fd 53 65 48 8b 1c 25 40 f0 RSP: 0018:ffffc900186e7980 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888016354680 RCX: ffffc90002241000 RDX: 0000000000000000 RSI: 0000000000000c59 RDI: ffffffff8a899b00 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffc900186e7a53 R10: fffff520030dcf4a R11: 0000000000000000 R12: ffff888016354964 R13: 0000000000000000 R14: ffff888076bd3880 R15: ffffc900186e7c00 lock_sock_nested+0x25/0x120 net/core/sock.c:3161 lock_sock include/net/sock.h:1613 [inline] sk_stream_wait_memory+0x871/0xed0 net/core/stream.c:145 tcp_sendmsg_locked+0xdbd/0x2f10 net/ipv4/tcp.c:1421 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1461 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 __sys_sendto+0x21c/0x320 net/socket.c:2019 __do_sys_sendto net/socket.c:2031 [inline] __se_sys_sendto net/socket.c:2027 [inline] __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2027 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fb4549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f55ae5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000200012c0 RDX: 0000000000088012 RSI: 000000000020c49a RDI: 0000000000000000 RBP: 0000000000000027 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 44 0f b6 25 98 9c 49 movzbl 0x5499c98(%rip),%r12d # 0x5499ca0 7: 05 8: 31 ff xor %edi,%edi a: 44 89 e6 mov %r12d,%esi d: e8 bf 3b 67 f9 callq 0xf9673bd1 12: 45 84 e4 test %r12b,%r12b 15: 0f 85 9d fa ff ff jne 0xfffffab8 1b: e9 36 57 19 01 jmpq 0x1195756 20: 40 84 ed test %bpl,%bpl 23: 75 52 jne 0x77 25: e8 67 35 67 f9 callq 0xf9673591 2a: 0f 0b ud2 <-- trapping instruction 2c: 45 31 e4 xor %r12d,%r12d 2f: e8 5d 35 67 f9 callq 0xf9673591 34: 48 8b 74 24 40 mov 0x40(%rsp),%rsi 39: 48 rex.W 3a: b8 00 00 00 00 mov $0x0,%eax