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: 1392 Comm: syz-executor.2 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: ffff88809e4c2000 RCX: ffffffff86fa5953 RDX: 000000000000006a RSI: ffffffff86fa5ac2 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff888041342280 R09: ffffed100be2ee9d R10: ffff88805f1774e3 R11: ffffed100be2ee9c R12: ffff88809e4c2000 R13: 0000000000000078 R14: ffff8880a86ec980 R15: 0000000000000010 FS: 00007ff4cfbef700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e08fe9db8 CR3: 0000000095d87000 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] RIP: 0010:lock_is_held_type+0x262/0x350 kernel/locking/lockdep.c:4973 Code: 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 c2 00 00 00 48 83 3d 37 13 3c 08 00 74 32 48 8b 7c 24 10 57 9d <0f> 1f 44 00 00 48 83 c4 18 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc900078fef40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1329844 RBX: ffff888041342280 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff888059df3740 RDI: 0000000000000282 RBP: ffff888041342280 R08: ffff888041342280 R09: ffffed1015cc7104 R10: ffff8880ae63881b R11: ffffed1015cc7103 R12: 0000000000000000 R13: ffff888041342b98 R14: ffff888041342b40 R15: ffff888059df3740 lock_is_held include/linux/lockdep.h:406 [inline] xa_entry include/linux/xarray.h:1180 [inline] xas_descend+0x29d/0x360 lib/xarray.c:204 xas_load+0xe5/0x140 lib/xarray.c:240 xas_find+0x637/0x8b0 lib/xarray.c:1094 find_get_pages_range+0x15b/0xb00 mm/filemap.c:1789 pagevec_lookup_range+0x32/0x70 mm/swap.c:1068 mpage_map_and_submit_buffers+0x240/0xa80 fs/ext4/inode.c:2300 mpage_map_and_submit_extent fs/ext4/inode.c:2456 [inline] ext4_writepages+0x1aa9/0x31d0 fs/ext4/inode.c:2770 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344 __filemap_fdatawrite_range+0x2aa/0x390 mm/filemap.c:421 filemap_write_and_wait_range mm/filemap.c:654 [inline] filemap_write_and_wait_range+0xf7/0x1e0 mm/filemap.c:648 iomap_dio_rw+0x623/0x1140 fs/iomap/direct-io.c:471 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter fs/ext4/file.c:129 [inline] ext4_file_read_iter+0x444/0x600 fs/ext4/file.c:114 call_read_iter include/linux/fs.h:1901 [inline] generic_file_splice_read+0x479/0x780 fs/splice.c:313 do_splice_to+0x114/0x160 fs/splice.c:892 splice_direct_to_actor+0x307/0x980 fs/splice.c:971 do_splice_direct+0x1b4/0x280 fs/splice.c:1080 do_sendfile+0x555/0xc50 fs/read_write.c:1521 __do_sys_sendfile64 fs/read_write.c:1582 [inline] __se_sys_sendfile64 fs/read_write.c:1568 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1568 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff4cfbeec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000004fc040 RCX: 000000000045c829 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000007 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000100000001 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008d6 R14: 00000000004cb7a1 R15: 00007ff4cfbef6d4 Modules linked in: ---[ end trace 3ac0bc12f58bcb62 ]--- 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: ffff88809e4c2000 RCX: ffffffff86fa5953 RDX: 000000000000006a RSI: ffffffff86fa5ac2 RDI: 0000000000000350 RBP: 0000000000000000 R08: ffff888041342280 R09: ffffed100be2ee9d R10: ffff88805f1774e3 R11: ffffed100be2ee9c R12: ffff88809e4c2000 R13: 0000000000000078 R14: ffff8880a86ec980 R15: 0000000000000010 FS: 00007ff4cfbef700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e08fe9db8 CR3: 0000000095d87000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400