sg_write: data in/out 486575354/302 bytes for SCSI command 0x67-- guessing data in; program syzkaller764432 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: 3331 Comm: syzkaller764432 Not tainted 4.9.75-g06fe41f #16 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801cb2d9800 task.stack: ffff8801c9868000 RIP: 0010:[] [] sg_read_oxfer drivers/scsi/sg.c:1976 [inline] RIP: 0010:[] [] sg_read+0xd0c/0x1440 drivers/scsi/sg.c:520 RSP: 0018:ffff8801c986fa50 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff826687d3 RDX: 0000000000000000 RSI: 000000000000001a RDI: ffff8801c8600170 RBP: ffff8801c986fb58 R08: 0000000000000000 R09: ffffed003964a411 R10: 0000000000000005 R11: ffffed003964a410 R12: 0000000000001000 R13: 0000000000000000 R14: ffff8801cb252060 R15: ffff8801c8600140 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008743840 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020701fc2 CR3: 00000001c856a000 CR4: 0000000000160670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801d1c98a40 ffff8801c986fa80 ffff8801c8600158 ffff88010000001a 0000000000000000 ffff8801c8600168 000000000000003e 0000000000000246 ffff8801d1678280 1ffff1003930df56 0000000020701fc2 0000000020701fe6 Call Trace: [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:1105 [inline] [] compat_do_readv_writev+0x522/0x760 fs/read_write.c:1099 [] compat_readv+0xe3/0x150 fs/read_write.c:1128 [] do_compat_readv+0xf4/0x1d0 fs/read_write.c:1148 [] C_SYSC_readv fs/read_write.c:1160 [inline] [] compat_SyS_readv+0x26/0x30 fs/read_write.c:1156 [] do_syscall_32_irqs_on arch/x86/entry/common.c:322 [inline] [] do_fast_syscall_32+0x2f7/0x890 arch/x86/entry/common.c:384 [] entry_SYSENTER_compat+0x74/0x83 arch/x86/entry/entry_64_compat.S:127 Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 06 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 df 05 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+0xd0c/0x1440 drivers/scsi/sg.c:520 RSP ---[ end trace 42f4f1718ef8bbc6 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..