kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access kobject: 'loop3' (00000000a0e7275a): kobject_uevent_env general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 18625 Comm: blkid Not tainted 4.20.0-rc7+ #361 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ax25_send_frame+0xe2/0x570 net/ax25/ax25_out.c:59 kobject: 'loop3' (00000000a0e7275a): fill_kobj_path: path = '/devices/virtual/block/loop3' Code: 34 91 00 00 48 85 c0 0f 85 c2 03 00 00 e8 d6 bd 7e fa 48 8d bb 38 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 03 00 00 48 8b 83 38 03 00 00 48 85 c0 48 89 RSP: 0018:ffff8880ae707518 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1100a4e3951 RDX: 0000000000000067 RSI: ffffffff86ff9d4a RDI: 0000000000000338 RBP: ffff8880ae707558 R08: ffff88805271ca88 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88805271c1c0 R12: ffff88809aec1a88 R13: ffffffff8be98280 R14: 0000000000000104 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 kobject: 'loop2' (0000000016318dbe): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff26e69ed8 CR3: 0000000097648000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_send_frame+0xda/0x280 net/rose/rose_link.c:109 rose_transmit_clear_request+0x1de/0x2a0 net/rose/rose_link.c:258 rose_rx_call_request+0x4ea/0x1c90 net/rose/af_rose.c:999 rose_loopback_timer+0x26a/0x3f0 net/rose/rose_loopback.c:100 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 kobject: 'loop2' (0000000016318dbe): fill_kobj_path: path = '/devices/virtual/block/loop2' expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 kobject: 'loop5' (00000000d24778f2): kobject_uevent_env kobject: 'loop5' (00000000d24778f2): fill_kobj_path: path = '/devices/virtual/block/loop5' run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x30c/0xb2e kernel/softirq.c:292 kobject: 'loop3' (00000000a0e7275a): kobject_uevent_env invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 kobject: 'loop3' (00000000a0e7275a): fill_kobj_path: path = '/devices/virtual/block/loop3' apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:write_comp_data+0x1/0x70 kernel/kcov.c:116 Code: e5 90 43 00 e9 a6 fc ff ff 4c 89 f7 e8 38 90 43 00 e9 6f fc ff ff e8 9e b7 c9 ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <48> 89 e5 65 4c 8b 04 25 40 ee 01 00 65 8b 05 0c 93 83 7e a9 00 01 RSP: 0018:ffff888090d1f088 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 kobject: 'loop2' (0000000016318dbe): kobject_uevent_env RAX: 0000000000000000 RBX: 00007f538b24f000 RCX: ffffffff81b177ab RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888090d1f098 R08: ffff88805271c1c0 R09: fffff94000052236 R10: fffff94000052236 R11: ffffea00002911b3 R12: 0000000000000025 R13: ffffea00002911c8 R14: dffffc0000000000 R15: ffffea00002911c0 kobject: 'loop2' (0000000016318dbe): fill_kobj_path: path = '/devices/virtual/block/loop2' zap_pte_range mm/memory.c:1082 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0xc4b/0x25b0 mm/memory.c:1264 kobject: 'loop0' (00000000f27d2df2): kobject_uevent_env kobject: 'loop0' (00000000f27d2df2): fill_kobj_path: path = '/devices/virtual/block/loop0' unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 kobject: 'loop3' (00000000a0e7275a): kobject_uevent_env __mmput kernel/fork.c:1045 [inline] mmput+0x247/0x610 kernel/fork.c:1066 kobject: 'loop3' (00000000a0e7275a): fill_kobj_path: path = '/devices/virtual/block/loop3' exit_mm kernel/exit.c:545 [inline] do_exit+0xe74/0x26d0 kernel/exit.c:854 kobject: 'loop5' (00000000d24778f2): kobject_uevent_env kobject: 'loop5' (00000000d24778f2): fill_kobj_path: path = '/devices/virtual/block/loop5' do_group_exit+0x177/0x440 kernel/exit.c:970 __do_sys_exit_group kernel/exit.c:981 [inline] __se_sys_exit_group kernel/exit.c:979 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:979 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f538b1e71e8 Code: Bad RIP value. RSP: 002b:00007fff26e6cfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f538b1e71e8 RDX: 0000000000000002 RSI: 000000000000003c RDI: 0000000000000002 RBP: 00007f538b4bc840 R08: 00000000000000e7 R09: ffffffffffffffa8 R10: 00007f538b4c2740 R11: 0000000000000246 R12: 00007f538b4bc840 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 9b094a20ff9d7199 ]--- RIP: 0010:ax25_send_frame+0xe2/0x570 net/ax25/ax25_out.c:59 Code: 34 91 00 00 48 85 c0 0f 85 c2 03 00 00 e8 d6 bd 7e fa 48 8d bb 38 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 03 00 00 48 8b 83 38 03 00 00 48 85 c0 48 89 RSP: 0018:ffff8880ae707518 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1100a4e3951 RDX: 0000000000000067 RSI: ffffffff86ff9d4a RDI: 0000000000000338 RBP: ffff8880ae707558 R08: ffff88805271ca88 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88805271c1c0 R12: ffff88809aec1a88 R13: ffffffff8be98280 R14: 0000000000000104 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f538b1e71be CR3: 0000000097648000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400