syzbot


KASAN: wild-memory-access Read of size 35

Status: closed as invalid on 2017/10/18 09:01
First crash: 2388d, last: 2388d

Sample crash report:
==================================================================
BUG: KASAN: wild-memory-access on address ffe7086b07f08000
Read of size 35 by task syz-executor3/22601
CPU: 1 PID: 22601 Comm: syz-executor3 Not tainted 4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a94ef9e8 ffffffff81d93149 ffe7086b07f08000 0000000000000023
 0000000000000000 ffff8801a81b4900 ffe7086b07f08000 ffff8801a94efa70
 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
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
device gre0 entered promiscuous mode
IPVS: Creating netns size=2536 id=55
IPVS: Creating netns size=2536 id=56
binder: 22743:22746 ioctl 4b6a 20df7fb3 returned -22
binder: 22743:22755 ioctl 4b6a 20df7fb3 returned -22
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
devpts: called with bogus options
devpts: called with bogus options
IPv6: Can't replace route, no match found
IPv6: Can't replace route, no match found
blk_update_request: I/O error, dev loop0, sector 0
blk_update_request: I/O error, dev loop0, sector 0
Buffer I/O error on dev loop5, logical block 0, lost async page write
Buffer I/O error on dev loop5, logical block 1, lost async page write
Buffer I/O error on dev loop5, logical block 2, lost async page write
Buffer I/O error on dev loop5, logical block 3, lost async page write
Buffer I/O error on dev loop5, logical block 4, lost async page write
Buffer I/O error on dev loop5, logical block 5, lost async page write
Buffer I/O error on dev loop5, logical block 6, lost async page write
Buffer I/O error on dev loop5, logical block 7, lost async page write
Buffer I/O error on dev loop5, logical block 8, lost async page write
Buffer I/O error on dev loop5, logical block 9, lost async page write
FAULT_FLAG_ALLOW_RETRY missing 30
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 23096 Comm: syz-executor3 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c5f3f9d0 ffffffff81d93149 ffff8801c5f3fcb0 0000000000000000
 ffff8801a8290b90 ffff8801c5f3fba0 ffff8801a8290a80 ffff8801c5f3fbc8
 ffffffff81660dc8 ffff8801c5f3fb20 0000000000000000 00000001cc08b067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad798>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
CPU: 1 PID: 23108 Comm: syz-executor3 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801aab579a0 ffffffff81d93149 ffff8801aab57c80 0000000000000000
 ffff8801a8290b90 ffff8801aab57b70 ffff8801a8290a80 ffff8801aab57b98
 ffffffff81660dc8 ffff8801aab57af0 ffff8801aab57bb8 00000001cc08b067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad798>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 23096 Comm: syz-executor3 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c5f3f9d0 ffffffff81d93149 ffff8801c5f3fcb0 0000000000000000
 ffff8801a8291d90 ffff8801c5f3fba0 ffff8801a8291c80 ffff8801c5f3fbc8
 ffffffff81660dc8 ffff8801c5f3fb20 0000000000000000 00000001cc08b067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad798>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
CPU: 0 PID: 23108 Comm: syz-executor3 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801aab579a0 ffffffff81d93149 ffff8801aab57c80 0000000000000000
 ffff8801a8291d90 ffff8801aab57b70 ffff8801a8291c80 ffff8801aab57b98
 ffffffff81660dc8 ffff8801aab57af0 ffff8801aab57bb8 00000001cc08b067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad798>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
device syz5 left promiscuous mode
device syz5 entered promiscuous mode
device syz5 left promiscuous mode
device syz5 entered promiscuous mode
IPVS: Creating netns size=2536 id=57
IPVS: Creating netns size=2536 id=58
nla_parse: 16 callbacks suppressed
netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor6'.
binder: 23326:23372 ioctl 5420 20185ffc returned -22
device syz2 entered promiscuous mode
netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'.
binder: 23326:23402 ioctl 5420 20185ffc returned -22
pktgen: kernel_thread() failed for cpu 0
pktgen: Cannot create thread for cpu 0 (-4)
pktgen: kernel_thread() failed for cpu 1
pktgen: Cannot create thread for cpu 1 (-4)
pktgen: Initialization failed for all threads
pktgen: kernel_thread() failed for cpu 1
pktgen: Cannot create thread for cpu 1 (-4)
IPVS: Creating netns size=2536 id=59
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pig=23451 comm=syz-executor7
PF_BRIDGE: RTM_SETLINK with unknown ifindex
PF_BRIDGE: RTM_SETLINK with unknown ifindex
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 23479 Comm: syz-executor3 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d4f17a00 ffffffff81d93149 ffff8801d4f17ce0 0000000000000000
 ffff8801d54abc10 ffff8801d4f17bd0 ffff8801d54abb00 ffff8801d4f17bf8
 ffffffff81660dc8 ffff8801d4f17b50 0000000041b58ab3 00000001d5e34067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad798>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 23479 Comm: syz-executor3 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d4f17a00 ffffffff81d93149 ffff8801d4f17ce0 0000000000000000
 ffff8801d54abf10 ffff8801d4f17bd0 ffff8801d54abe00 ffff8801d4f17bf8
 ffffffff81660dc8 ffff8801d4f17b50 0000000041b58ab3 00000001d5e34067
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81660dc8>] handle_userfault+0xa48/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cfd71>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cfd71>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cfd71>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cfd71>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810e020b>] __do_page_fault+0x4eb/0xbd0 arch/x86/mm/fault.c:1397
 [<ffffffff810e0917>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1460
 [<ffffffff838ad798>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
sg_write: data in/out 65500/34 bytes for SCSI command 0xfc-- guessing data in;
   program syz-executor1 not setting count and/or reply_len properly
tc_dump_action: action bad kind
tc_dump_action: action bad kind
device gre0 entered promiscuous mode
sg_write: data in/out 65500/34 bytes for SCSI command 0xfc-- guessing data in;
   program syz-executor7 not setting count and/or reply_len properly
kasan: CONFIG_KASAN_INLINE enabled
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=21199 sclass=netlink_audit_socket pig=23864 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=41 sclass=netlink_audit_socket pig=23864 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=21199 sclass=netlink_audit_socket pig=23864 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=41 sclass=netlink_audit_socket pig=23864 comm=syz-executor3
kasan: GPF could be caused by NULL-ptr deref or user memory access
netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'.
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 23850 Comm: syz-executor7 Tainted: G    B           4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c76c3000 task.stack: ffff8801a9200000
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] put_page_testzero include/linux/mm.h:445 [inline]
RIP: 0010:[<ffffffff8144df71>]  [<ffffffff8144df71>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
RSP: 0018:ffff8801a92079b0  EFLAGS: 00010a07
RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffc90000a24000
RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
RBP: ffff8801a92079c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff10035240f16 R12: 0000000000000004
R13: 0000000000000020 R14: ffff8801a9cb4200 R15: dffffc0000000000
FS:  00007fdd6c617700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000283fcd8 CR3: 00000001c62c1000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffff8801a9cb4358 ffff8801a9207a20 ffffffff82661ed1
 ffff8801a9cb4370 ffffed003539686b ffffed003539686e ffff8801a9cb4368
 dead4ead00000000 ffff8801a9cb4340 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff82661ed1>] sg_remove_scat.isra.20+0x1c1/0x2d0 drivers/scsi/sg.c:1954
 [<ffffffff82662295>] sg_finish_rem_req+0x2b5/0x340 drivers/scsi/sg.c:1836
 [<ffffffff826624ad>] sg_new_read.isra.21+0x18d/0x3e0 drivers/scsi/sg.c:567
 [<ffffffff82663f36>] sg_read+0x8a6/0x1400 drivers/scsi/sg.c:456
 [<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
 [<ffffffff838ac5c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: ff 66 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d 
RIP  [<ffffffff8144df71>] __read_once_size include/linux/compiler.h:243 [inline]
RIP  [<ffffffff8144df71>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP  [<ffffffff8144df71>] page_ref_count include/linux/page_ref.h:66 [inline]
RIP  [<ffffffff8144df71>] put_page_testzero include/linux/mm.h:445 [inline]
RIP  [<ffffffff8144df71>] __free_pages+0x21/0x80 mm/page_alloc.c:3901
 RSP <ffff8801a92079b0>
---[ end trace 11ed5aed8ed1ccdc ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/09/29 04:07 https://android.googlesource.com/kernel/common android-4.9 c30c69c76c1d c26ea367 .config console log report ci-android-49-kasan-gce
* Struck through repros no longer work on HEAD.