kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 4202 Comm: syz-executor4 Not tainted 5.0.0-rc4-next-20190130 #22 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:relay_set_buf_dentry kernel/relay.c:412 [inline] RIP: 0010:relay_open_buf.part.0+0x7cb/0xb40 kernel/relay.c:458 Code: c1 ea 03 80 3c 02 00 0f 85 4c 03 00 00 49 8d 7d 58 4d 89 ac 24 90 00 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 1b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff88805020f670 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff8880539bf5c0 RCX: ffffc9000e878000 RDX: 0000000000000008 RSI: ffffffff81833b80 RDI: 0000000000000047 RBP: ffff88805020f6e8 R08: 0000000000000006 R09: ffff888055e2ce08 R10: ffff888055e2c540 R11: 0000000000000000 R12: ffff88808ab115c0 R13: ffffffffffffffef R14: 0000000000000000 R15: 00000000000003a8 FS: 00007f712f5ab700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f43e39518 CR3: 0000000094f8a000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: relay_open_buf kernel/relay.c:447 [inline] relay_open kernel/relay.c:597 [inline] relay_open+0x5f3/0xaf0 kernel/relay.c:561 do_blk_trace_setup+0x50d/0xdb0 kernel/trace/blktrace.c:532 __blk_trace_setup+0xe3/0x190 kernel/trace/blktrace.c:577 blk_trace_ioctl+0x170/0x300 kernel/trace/blktrace.c:716 blkdev_ioctl+0x141/0x2120 block/ioctl.c:591 block_ioctl+0xee/0x130 fs/block_dev.c:1914 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458089 Code: 6d 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f712f5aac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458089 RDX: 0000000020000140 RSI: 00000000c0481273 RDI: 0000000000000006 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f712f5ab6d4 R13: 00000000004bf54d R14: 00000000004d0e38 R15: 00000000ffffffff Modules linked in: ---[ end trace 254dd4dded3cf47a ]--- RIP: 0010:relay_set_buf_dentry kernel/relay.c:412 [inline] RIP: 0010:relay_open_buf.part.0+0x7cb/0xb40 kernel/relay.c:458 Code: c1 ea 03 80 3c 02 00 0f 85 4c 03 00 00 49 8d 7d 58 4d 89 ac 24 90 00 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 1b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff88805020f670 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff8880539bf5c0 RCX: ffffc9000e878000 RDX: 0000000000000008 RSI: ffffffff81833b80 RDI: 0000000000000047 RBP: ffff88805020f6e8 R08: 0000000000000006 R09: ffff888055e2ce08 R10: ffff888055e2c540 R11: 0000000000000000 R12: ffff88808ab115c0 R13: ffffffffffffffef R14: 0000000000000000 R15: 00000000000003a8 FS: 00007f712f5ab700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f44483000 CR3: 0000000094f8a000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400