general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357] CPU: 1 PID: 12888 Comm: syz-executor.5 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff RSP: 0018:ffffc90000da8b08 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88809953d800 RCX: ffffffff8716aef3 RDX: 000000000000006a RSI: ffffffff8716b062 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809764b0e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809953d800 R13: 0000000000000078 R14: ffff888050d86d40 R15: 0000000000000010 FS: 00007f9373b1b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30721000 CR3: 000000004e170000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4bd/0x1978 net/rose/af_rose.c:998 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:xa_head include/linux/xarray.h:1164 [inline] RIP: 0010:xas_start+0xbe/0x530 lib/xarray.c:188 Code: 33 49 8d 7e 48 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 22 04 00 00 4d 8b 66 48 e8 5d 1f 3c 04 31 ff 89 c5 89 c6 e8 e2 6e c1 fd <85> ed 0f 85 97 00 00 00 e8 55 72 c1 fd 48 8d 7b 08 4d 89 e6 48 b8 RSP: 0018:ffffc90008627818 EFLAGS: 00000297 RAX: 0000000000000002 RBX: ffffc90008627978 RCX: ffffffff83b2aa7e RDX: 0000000000000001 RSI: ffff888050e04300 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8c5d8a27 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888046ab9cc2 R13: ffffc90008627990 R14: ffff888095715b50 R15: ffffc90008627a88 xas_load+0x28/0x140 lib/xarray.c:233 xas_find+0x5fd/0x860 lib/xarray.c:1094 filemap_map_pages+0x1be/0x1280 mm/filemap.c:2684 do_fault_around mm/memory.c:3818 [inline] do_read_fault mm/memory.c:3852 [inline] do_fault mm/memory.c:3985 [inline] handle_pte_fault mm/memory.c:4225 [inline] __handle_mm_fault mm/memory.c:4357 [inline] handle_mm_fault+0x39b7/0x43f0 mm/memory.c:4394 faultin_page mm/gup.c:887 [inline] __get_user_pages+0x733/0x1760 mm/gup.c:1113 populate_vma_page_range+0x251/0x330 mm/gup.c:1452 __mm_populate+0x1ea/0x350 mm/gup.c:1500 mm_populate include/linux/mm.h:2605 [inline] vm_mmap_pgoff+0x1e2/0x200 mm/util.c:511 ksys_mmap_pgoff+0xde/0x5a0 mm/mmap.c:1595 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d249 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9373b1ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 000000000001ff40 RCX: 000000000045d249 RDX: 0000000001000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000118d038 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 000000000118cfec R13: 00007fff39cba5af R14: 00007f9373b1b9c0 R15: 000000000118cfec Modules linked in: ---[ end trace 5889df18b1f2e4fc ]--- RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 8d bd 50 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ea 00 00 00 4c 8b bd 50 03 00 00 e9 77 fe ff ff RSP: 0018:ffffc90000da8b08 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88809953d800 RCX: ffffffff8716aef3 RDX: 000000000000006a RSI: ffffffff8716b062 RDI: 0000000000000350 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809764b0e3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809953d800 R13: 0000000000000078 R14: ffff888050d86d40 R15: 0000000000000010 FS: 00007f9373b1b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30721000 CR3: 000000004e170000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400