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KASAN: wild-memory-access Read of size 93

Status: closed as invalid on 2017/10/18 09:01
First crash: 2392d, last: 2392d

Sample crash report:
==================================================================
BUG: KASAN: wild-memory-access on address ffe7086a93108000
Read of size 93 by task syz-executor1/5414
CPU: 1 PID: 5414 Comm: syz-executor1 Not tainted 4.9.52-g96a28fc #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cacdf9e8 ffffffff81d93149 ffe7086a93108000 000000000000005d
 0000000000000000 ffff8801a4df76c0 ffe7086a93108000 ffff8801cacdfa70
 ffffffff8153d08f 0000000000000000 0000000000000001 ffffffff826648db
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d08f>] kasan_report_error mm/kasan/report.c:284 [inline]
 [<ffffffff8153d08f>] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309
 [<ffffffff8153d460>] kasan_report+0x20/0x30 mm/kasan/report.c:296
 [<ffffffff8153bda7>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff8153bda7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff8153be11>] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320
 [<ffffffff826648db>] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline]
 [<ffffffff826648db>] sg_read_oxfer drivers/scsi/sg.c:1978 [inline]
 [<ffffffff826648db>] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520
 [<ffffffff8156b741>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156f510>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156f510>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156f7c4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156f8e6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81572ca7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81572ca7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
sg_write: data in/out 31877/6 bytes for SCSI command 0x0-- guessing data in;
   program syz-executor1 not setting count and/or reply_len properly
9pnet_virtio: no channels available for device ./file0
9pnet_virtio: no channels available for device ./file0
nla_parse: 18 callbacks suppressed
netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
device gre0 entered promiscuous mode
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5489 Comm: syz-executor1 Tainted: G    B           4.9.52-g96a28fc #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801aadde000 task.stack: ffff8801d97f0000
RIP: 0010:[<ffffffff82664351>]  [<ffffffff82664351>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82664351>]  [<ffffffff82664351>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801d97f7ac0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000136c000
RDX: 0000000000000000 RSI: 0000000000000fdc RDI: ffff8801cee0a270
RBP: ffff8801d97f7bc8 R08: 0000000000000000 R09: ffffed003a4ab185
R10: 0000000000000005 R11: ffffed003a4ab184 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801d2558c00 R15: ffff8801cee0a240
FS:  00007ff357ebf700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004c4e70 CR3: 00000001ceb35000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffea000765fdc0 ffff8801d97f7b18 ffff8801cee0a258 0000000000000fdc
 ffff8801d97f7d60 ffff8801cee0a268 0000000000001000 0000000000000246
 ffff8801d1b7b680 1ffff1003b2fef64 0000000020fb2000 0000000020fb2024
Call Trace:
 [<ffffffff8156b741>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156f510>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156f510>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156f7c4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156f8e6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81572ca7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81572ca7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838ac645>] 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  [<ffffffff82664351>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82664351>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801d97f7ac0>
device gre0 left promiscuous mode
---[ end trace f5937e04f88c73bb ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/10/04 19:21 https://android.googlesource.com/kernel/common android-4.9 96a28fcc7c92 c26ea367 .config console log report ci-android-49-kasan-gce
* Struck through repros no longer work on HEAD.