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KASAN: wild-memory-access Read of size 123

Status: closed as invalid on 2017/10/18 09:01
First crash: 2374d, last: 2374d

Sample crash report:
device gre0 entered promiscuous mode
9pnet_virtio: no channels available for device ./file0
==================================================================
BUG: KASAN: wild-memory-access on address ffe7087453303000
Read of size 123 by task syz-executor7/4749
CPU: 1 PID: 4749 Comm: syz-executor7 Not tainted 4.9.56-g5c73594 #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d1b9fae8 ffffffff81d93999 ffe7087453303000 000000000000007b
 0000000000000000 ffff8801aa0862a0 ffe7087453303000 ffff8801d1b9fb70
 ffffffff8153d5cf 0000000000000000 0000000000000001 ffffffff8266527b
Call Trace:
 [<ffffffff81d93999>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93999>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d5cf>] kasan_report_error mm/kasan/report.c:284 [inline]
 [<ffffffff8153d5cf>] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309
 [<ffffffff8153d9a0>] kasan_report+0x20/0x30 mm/kasan/report.c:296
 [<ffffffff8153c2e7>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff8153c2e7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff8153c351>] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320
 [<ffffffff8266527b>] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline]
 [<ffffffff8266527b>] sg_read_oxfer drivers/scsi/sg.c:1978 [inline]
 [<ffffffff8266527b>] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520
 [<ffffffff8156d893>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ee27>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff81572ac9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff81572ac9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838ad085>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
binder: 4729:4738 ioctl 2403 7fff returned -22
9pnet_virtio: no channels available for device ./file0
binder: 4729:4778 ioctl 2403 7fff returned -22
capability: warning: `syz-executor5' uses 32-bit capabilities (legacy support in use)
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: 4850 Comm: syz-executor7 Tainted: G    B           4.9.56-g5c73594 #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cfe96000 task.stack: ffff8801c83b0000
RIP: 0010:[<ffffffff82664cf1>]  [<ffffffff82664cf1>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82664cf1>]  [<ffffffff82664cf1>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801c83b7bc0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900011bb000
RDX: 0000000000000000 RSI: 000000000000007b RDI: ffff8801d0c5c370
RBP: ffff8801c83b7cd0 R08: 0000000000000000 R09: ffffed003478f289
R10: 0000000000000005 R11: ffffed003478f288 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801a3c79420 R15: ffff8801d0c5c340
FS:  00007f65fbb4f700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002004e000 CR3: 00000001a6ed0000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffffffffffffffda ffff8801d0c5c358 ffff88010000007b
 ffff8801c83b7e38 ffff8801d0c5c368 000000000000009f ffff8801a85f6a80
 ffff8801d14cc000 1ffff10039076f84 000000002004e000 000000002004e024
Call Trace:
 [<ffffffff8156d893>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156ee27>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff81572ac9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff81572ac9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838ad085>] 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  [<ffffffff82664cf1>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82664cf1>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801c83b7bc0>
---[ end trace c03a67a7c5433ed4 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/10/17 03:33 https://android.googlesource.com/kernel/common android-4.9 5c73594e214f b69d27d1 .config console log report ci-android-49-kasan-gce
* Struck through repros no longer work on HEAD.