general protection fault, probably for non-canonical address 0xdffffc000000006a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000350-0x0000000000000357] CPU: 0 PID: 18566 Comm: syz-executor.1 Not tainted 5.7.0-rc1-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:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a73c7800 RCX: ffffffff86fa57d3 RDX: 000000000000006a RSI: ffffffff86fa5942 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88805ca083c0 R09: ffffed101202c79d R10: ffff888090163ce3 R11: ffffed101202c79c R12: ffff8880a73c7800 R13: 0000000000000078 R14: ffff88805563a2c0 R15: 0000000000000010 FS: 00007f19b40dd700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000076c000 CR3: 0000000059974000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rose_transmit_clear_request+0x1de/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x488/0x1960 net/rose/af_rose.c:976 rose_loopback_timer+0x15d/0x470 net/rose/rose_loopback.c:100 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1405 expire_timers kernel/time/timer.c:1450 [inline] __run_timers kernel/time/timer.c:1774 [inline] __run_timers kernel/time/timer.c:1741 [inline] run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1787 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x192/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:xas_load+0xf4/0x140 lib/xarray.c:241 Code: fe e8 50 12 c4 fd 45 38 fe 77 8c e8 86 11 c4 fd 48 89 de 48 89 ef e8 bb fb ff ff 49 89 c4 48 89 d8 48 c1 e8 03 42 0f b6 04 28 <84> c0 74 02 7e 25 0f b6 1b 31 ff 89 de e8 8a 12 c4 fd 84 db 0f 85 RSP: 0018:ffffc90001997568 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff888055a7f300 RCX: ffffc90004819000 RDX: 0000000000000002 RSI: ffffffff83af1f7c RDI: ffffc9000199760a RBP: ffffc900019975f8 R08: ffff88805ca083c0 R09: ffffed1015cc7104 R10: ffff8880ae63881b R11: ffffed1015cc7103 R12: ffff8880479af602 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000006 find_get_entry+0x138/0x730 mm/filemap.c:1511 find_lock_entry+0x2e/0x610 mm/filemap.c:1561 shmem_getpage_gfp+0x22c/0x2a10 mm/shmem.c:1758 shmem_fault+0x204/0x820 mm/shmem.c:2062 __do_fault+0x10d/0x520 mm/memory.c:3450 do_read_fault mm/memory.c:3846 [inline] do_fault mm/memory.c:3975 [inline] handle_pte_fault mm/memory.c:4215 [inline] __handle_mm_fault+0x28a7/0x3c90 mm/memory.c:4345 handle_mm_fault+0x1a5/0x660 mm/memory.c:4382 faultin_page mm/gup.c:879 [inline] __get_user_pages+0x7ab/0x1870 mm/gup.c:1098 populate_vma_page_range+0x1fd/0x290 mm/gup.c:1430 __mm_populate+0x1e8/0x350 mm/gup.c:1478 mm_populate include/linux/mm.h:2562 [inline] vm_mmap_pgoff+0x1e2/0x200 mm/util.c:511 ksys_mmap_pgoff+0xd8/0x5b0 mm/mmap.c:1595 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c889 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f19b40dcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f19b40dd6d4 RCX: 000000000045c889 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000076bfa0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000738 R14: 00000000004c9fcd R15: 000000000076bfac Modules linked in: ---[ end trace 05996d2e991fa101 ]--- 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:ffffc90000007b00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff8880a73c7800 RCX: ffffffff86fa57d3 RDX: 000000000000006a RSI: ffffffff86fa5942 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff88805ca083c0 R09: ffffed101202c79d R10: ffff888090163ce3 R11: ffffed101202c79c R12: ffff8880a73c7800 R13: 0000000000000078 R14: ffff88805563a2c0 R15: 0000000000000010 FS: 00007f19b40dd700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000076c000 CR3: 0000000059974000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400