program syzkaller805614 not setting count and/or reply_len properly 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 Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 3237 Comm: syzkaller805614 Not tainted 4.9.52-g9b2b081 #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d6a51800 task.stack: ffff8801d92a0000 RIP: 0010:[] [] sg_read_oxfer drivers/scsi/sg.c:1976 [inline] RIP: 0010:[] [] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520 RSP: 0018:ffff8801d92a7700 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c RDX: 0000000000000000 RSI: 0000000000000fdc RDI: ffff8801d8e84370 RBP: ffff8801d92a7808 R08: 0000000000000000 R09: ffffed0039bd68c5 R10: 0000000000000005 R11: ffffed0039bd68c4 R12: 0000000000001000 R13: 0000000000000000 R14: ffff8801cdeb4600 R15: ffff8801d8e84340 FS: 0000000001b3b880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020df7000 CR3: 00000001d682c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffea00075a0900 ffff8801d92a7758 ffff8801d8e84358 ffffffff00000fdc ffff8801d6824240 ffff8801d8e84368 0000000000001000 0000000000000246 ffff8801d1badb80 1ffff1003b254eec ffff8801ca6e2000 ffff8801ca6e2024 Call Trace: [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] kernel_readv fs/splice.c:363 [inline] [] default_file_splice_read+0x43f/0x7a0 fs/splice.c:435 [] do_splice_to+0x10a/0x160 fs/splice.c:899 [] do_splice fs/splice.c:1192 [inline] [] SYSC_splice fs/splice.c:1416 [inline] [] SyS_splice+0xf5f/0x1520 fs/splice.c:1399 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 19 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 06 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 RIP [] sg_read_oxfer drivers/scsi/sg.c:1976 [inline] RIP [] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520 RSP ---[ end trace ed83b6236b1d0826 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..