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KASAN: wild-memory-access Read of size 201

Status: closed as invalid on 2017/10/18 09:01
First crash: 2379d, last: 2379d

Sample crash report:
   program syz-executor4 not setting count and/or reply_len properly
==================================================================
BUG: KASAN: wild-memory-access on address ffe708746e2ab000
Read of size 201 by task syz-executor4/4556
CPU: 0 PID: 4556 Comm: syz-executor4 Not tainted 4.9.54-ge5eba30 #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a86bfae8 ffffffff81d93659 ffe708746e2ab000 00000000000000c9
 0000000000000000 ffff8801a67edde0 ffe708746e2ab000 ffff8801a86bfb70
 ffffffff8153d48f 0000000000000000 0000000000000001 ffffffff826651bb
Call Trace:
 [<ffffffff81d93659>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93659>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d48f>] kasan_report_error mm/kasan/report.c:284 [inline]
 [<ffffffff8153d48f>] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309
 [<ffffffff8153d860>] kasan_report+0x20/0x30 mm/kasan/report.c:296
 [<ffffffff8153c1a7>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff8153c1a7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff8153c211>] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320
 [<ffffffff826651bb>] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline]
 [<ffffffff826651bb>] sg_read_oxfer drivers/scsi/sg.c:1978 [inline]
 [<ffffffff826651bb>] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520
 [<ffffffff8156d753>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ece7>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff815728c9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff815728c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838aeec5>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
sg_write: data in/out 392925/816 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor4 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: 0 PID: 4559 Comm: syz-executor4 Tainted: G    B           4.9.54-ge5eba30 #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801a66c1800 task.stack: ffff8801a5ef0000
RIP: 0010:[<ffffffff82664c31>]  [<ffffffff82664c31>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82664c31>]  [<ffffffff82664c31>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801a5ef7bc0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002272000
RDX: 0000000000000000 RSI: 00000000000000c9 RDI: ffff8801a5e82270
RBP: ffff8801a5ef7cd0 R08: 0000000000000000 R09: ffffed0034cfdbe5
R10: 0000000000000005 R11: ffffed0034cfdbe4 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801a67edf00 R15: ffff8801a5e82240
FS:  00007fcf6f0a8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020600000 CR3: 00000001cb4c0000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffffffffffffffda ffff8801a5e82258 ffff8801000000c9
 ffff8801a5ef7e38 ffff8801a5e82268 00000000000000ed 00000000ffffffff
 ffff8801d1b8aa00 1ffff10034bdef84 0000000020508f13 0000000020508f37
Call Trace:
 [<ffffffff8156d753>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ece7>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff815728c9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff815728c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838aeec5>] 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  [<ffffffff82664c31>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82664c31>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801a5ef7bc0>
---[ end trace fac412b18e95189e ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/10/10 04:20 https://android.googlesource.com/kernel/common android-4.9 e5eba30388a2 c26ea367 .config console log report ci-android-49-kasan-gce
* Struck through repros no longer work on HEAD.