syzbot


kernel BUG at drivers/android/binder_alloc.c:LINE! (2)

Status: public: reported C repro on 2019/06/17 23:05
Reported-by: syzbot+e19d7cad89dfe9546a61@syzkaller.appspotmail.com
First crash: 1805d, last: 1805d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at drivers/android/binder_alloc.c:LINE! kernel C 856 2364d 2368d 4/26 fixed on 2018/02/01 10:32
upstream kernel BUG in binder_alloc_deferred_release kernel C done 4 705d 707d 22/26 fixed on 2023/02/24 13:50
upstream kernel BUG at drivers/android/binder_alloc.c:LINE! (3) kernel C done 24 1817d 1886d 12/26 fixed on 2019/06/14 18:22
upstream kernel BUG at drivers/android/binder_alloc.c:LINE! (2) kernel C 1257 1886d 1928d 11/26 fixed on 2019/03/28 12:00
upstream kernel BUG at drivers/android/binder_alloc.c:LINE! (4) C done 26 1797d 1805d 12/26 fixed on 2019/08/05 13:45
android-414 kernel BUG at drivers/android/binder_alloc.c:LINE! C 30 1887d 1888d 1/1 fixed on 2019/03/28 03:28
android-49 kernel BUG at drivers/android/binder_alloc.c:LINE! C 44 1640d 1888d 1/3 internal: reported C repro on 2019/03/26 19:34

Sample crash report:
random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1560811836.695:7): avc:  denied  { map } for  pid=1804 comm="syz-executor336" path="/root/syz-executor336234600" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
------------[ cut here ]------------
audit: type=1400 audit(1560811836.695:8): avc:  denied  { map } for  pid=1804 comm="syz-executor336" path="/dev/binder0" dev="devtmpfs" ino=5442 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1
kernel BUG at drivers/android/binder_alloc.c:1128!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
audit: type=1400 audit(1560811836.695:9): avc:  denied  { set_context_mgr } for  pid=1804 comm="syz-executor336" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=binder permissive=1
Modules linked in:
CPU: 0 PID: 1804 Comm: syz-executor336 Not tainted 4.14.127+ #8
task:         (ptrval) task.stack:         (ptrval)
RIP: 0010:binder_alloc_do_buffer_copy+0xc7/0x500 drivers/android/binder_alloc.c:1128
RSP: 0018:ffff8881cf4a7550 EFLAGS: 00010297
audit: type=1400 audit(1560811836.695:10): avc:  denied  { call } for  pid=1804 comm="syz-executor336" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=binder permissive=1
RAX: ffff8881d0f20000 RBX: 0000000020001000 RCX: 00000000000000a8
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881d25f1458
RBP: 0000000000000078 R08: ffff8881cf4a7608 R09: 0000000000000008
R10: ffffed1039e94f1a R11: ffff8881cf4a78d7 R12: ffff8881cff05498
R13: 0000000000000008 R14: 00000000000000a8 R15: ffff8881cf4a7608
FS:  0000000001a61940(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056252e0af0f0 CR3: 00000001d691e004 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 binder_validate_ptr+0xad/0x190 drivers/android/binder.c:2315
 binder_transaction+0x1edf/0x5700 drivers/android/binder.c:3423
audit: type=1400 audit(1560811836.695:11): avc:  denied  { transfer } for  pid=1804 comm="syz-executor336" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=binder permissive=1
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0d 04 00 00 48 8b 6d 58 48 29 dd e8 33 14 0c ff 49 39 ed 76 07 e8 29 14 0c ff <0f> 0b e8 22 14 0c ff 4c 29 ed 49 39 ee 77 ec e8 15 14 0c ff 41 
RIP: binder_alloc_do_buffer_copy+0xc7/0x500 drivers/android/binder_alloc.c:1128 RSP: ffff8881cf4a7550
---[ end trace 1d84e715307b7948 ]---

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/06/17 22:55 android-4.14 dfb686cea779 442206d7 .config console log report syz C ci-android-414-kasan-gce-root
2019/06/17 22:29 android-4.14 dfb686cea779 442206d7 .config console log report syz C ci-android-414-kasan-gce-root
2019/06/17 22:04 android-4.14 dfb686cea779 442206d7 .config console log report syz C ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.