syzbot


general protection fault in ebitmap_destroy

Status: public: reported C repro on 2019/04/11 08:44
Reported-by: syzbot+2c8dd047d66cbaae0ae2@syzkaller.appspotmail.com
First crash: 1871d, last: 1543d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in ebitmap_destroy selinux syz 1 1871d 1871d 11/26 fixed on 2019/03/06 07:43
android-44 general protection fault in ebitmap_destroy C 3 1861d 1778d 0/2 public: reported C repro on 2019/04/13 00:01
android-414 general protection fault in ebitmap_destroy syz 1 1871d 1780d 0/1 public: reported syz repro on 2019/04/10 16:14
upstream general protection fault in ebitmap_destroy (2) selinux C done 36 1799d 1807d 11/26 fixed on 2019/04/01 10:28

Sample crash report:
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
Modules linked in:
CPU: 0 PID: 4340 Comm: syz-executor388 Not tainted 4.9.141+ #1
task: ffff8801cce5af80 task.stack: ffff8801cb1b0000
RIP: 0010:[<ffffffff81a17f12>]  [<ffffffff81a17f12>] ebitmap_destroy+0x32/0x100 security/selinux/ss/ebitmap.c:331
RSP: 0018:ffff8801cb1b73e8  EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8801cbaa3240 RCX: ffffed00399cb705
RDX: 0000000000000001 RSI: ffffffff81a17f01 RDI: 0000000000000008
RBP: ffff8801cb1b7408 R08: ffff8801cce5b830 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff10039636e89 R14: 0000000000000008 R15: ffff8801cb1b74a8
FS:  00007faf93ad4700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006dd0a0 CR3: 00000001cd368000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801cbaa3240 0000000000000000 1ffff10039636e89 00000000ffffffea
 ffff8801cb1b7428 ffffffff81a20997 ffff8801cb1b7908 ffff8801cbaa3240
 ffff8801cb1b74d0 ffffffff81a2124e ffff8801cbaf1ea0 0000000000000004
Call Trace:
 [<ffffffff81a20997>] sens_destroy+0x47/0x90 security/selinux/ss/policydb.c:729
 [<ffffffff81a2124e>] sens_read+0x1de/0x360 security/selinux/ss/policydb.c:1630
 [<ffffffff81a2b1ea>] policydb_read+0xdba/0x2390 security/selinux/ss/policydb.c:2367
 [<ffffffff81a3ba84>] security_load_policy+0x264/0x9b0 security/selinux/ss/services.c:2067
 [<ffffffff81a1233b>] sel_write_load+0x19b/0xfa0 security/selinux/selinuxfs.c:522
 [<ffffffff81508085>] __vfs_write+0x115/0x580 fs/read_write.c:507
 [<ffffffff8150ab97>] vfs_write+0x187/0x520 fs/read_write.c:557
 [<ffffffff8150e9c9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff8150e9c9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 89 fe 41 55 41 54 53 e8 6d 3b 90 ff 4d 85 f6 0f 84 a6 00 00 00 e8 5f 3b 90 ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 a5 00 00 00 49 8b 1e 48 85 db 74 32 49 bd 00 
RIP  [<ffffffff81a17f12>] ebitmap_destroy+0x32/0x100 security/selinux/ss/ebitmap.c:331
 RSP <ffff8801cb1b73e8>
---[ end trace 6fa09ee25ed1a4e3 ]---

Crashes (2216):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/01/09 14:42 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 45c0c1b1 .config console log report syz C ci-android-49-kasan-gce
2019/01/09 14:37 https://android.googlesource.com/kernel/common android-4.9 043c92bd0517 45c0c1b1 .config console log report syz C ci-android-49-kasan-gce-root
2019/12/03 13:19 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ab342da3 .config console log report ci-android-49-kasan-gce
2019/12/03 09:41 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ab342da3 .config console log report ci-android-49-kasan-gce
2019/12/03 07:31 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ab342da3 .config console log report ci-android-49-kasan-gce
2019/12/03 05:34 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ab342da3 .config console log report ci-android-49-kasan-gce
2019/12/03 02:59 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ab342da3 .config console log report ci-android-49-kasan-gce
2019/12/02 22:18 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ab342da3 .config console log report ci-android-49-kasan-gce
2019/12/02 06:41 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 f879db37 .config console log report ci-android-49-kasan-gce
2019/12/01 02:01 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 a76bf83f .config console log report ci-android-49-kasan-gce
2019/11/30 19:50 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 3a75be00 .config console log report ci-android-49-kasan-gce
2019/11/30 13:08 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 3a75be00 .config console log report ci-android-49-kasan-gce
2019/11/28 22:00 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 46869e3e .config console log report ci-android-49-kasan-gce
2019/11/28 16:52 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 46869e3e .config console log report ci-android-49-kasan-gce
2019/11/26 15:30 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 f746151a .config console log report ci-android-49-kasan-gce
2019/11/26 09:03 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 f746151a .config console log report ci-android-49-kasan-gce
2019/11/26 06:04 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 f746151a .config console log report ci-android-49-kasan-gce
2019/11/25 19:11 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 371caf77 .config console log report ci-android-49-kasan-gce
2019/11/25 15:07 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 371caf77 .config console log report ci-android-49-kasan-gce
2019/11/25 12:46 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 371caf77 .config console log report ci-android-49-kasan-gce
2019/11/23 12:52 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce
2019/11/22 05:19 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 8098ea0f .config console log report ci-android-49-kasan-gce
2019/12/04 00:53 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 ae13a849 .config console log report ci-android-49-kasan-gce-386
2019/12/01 02:02 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 a76bf83f .config console log report ci-android-49-kasan-gce-386
2019/11/30 04:48 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 3a75be00 .config console log report ci-android-49-kasan-gce-386
2019/11/30 01:25 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 3a75be00 .config console log report ci-android-49-kasan-gce-386
2019/11/29 20:55 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 d29b9e84 .config console log report ci-android-49-kasan-gce-386
2019/11/29 10:16 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 76357d6f .config console log report ci-android-49-kasan-gce-386
2019/11/29 07:28 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 76357d6f .config console log report ci-android-49-kasan-gce-386
2019/11/28 16:57 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 46869e3e .config console log report ci-android-49-kasan-gce-386
2019/11/28 07:54 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 0d63f89c .config console log report ci-android-49-kasan-gce-386
2019/11/28 03:13 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 0d63f89c .config console log report ci-android-49-kasan-gce-386
2019/11/27 22:36 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 0d63f89c .config console log report ci-android-49-kasan-gce-386
2019/11/27 12:34 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 1048481f .config console log report ci-android-49-kasan-gce-386
2019/11/27 05:23 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 1048481f .config console log report ci-android-49-kasan-gce-386
2019/11/27 02:19 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 1048481f .config console log report ci-android-49-kasan-gce-386
2019/11/26 03:47 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 f746151a .config console log report ci-android-49-kasan-gce-386
2019/11/25 15:07 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 371caf77 .config console log report ci-android-49-kasan-gce-386
2019/11/25 08:55 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce-386
2019/11/24 22:03 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce-386
2019/11/24 22:01 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce-386
2019/11/24 00:39 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce-386
2019/11/22 20:43 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce-386
2019/11/22 16:03 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 598ca6c8 .config console log report ci-android-49-kasan-gce-386
2019/11/22 05:19 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 8098ea0f .config console log report ci-android-49-kasan-gce-386
2019/11/21 19:53 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 8098ea0f .config console log report ci-android-49-kasan-gce-386
2019/11/21 11:51 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 8098ea0f .config console log report ci-android-49-kasan-gce-386
2019/11/21 08:08 https://android.googlesource.com/kernel/common android-4.9 8fe428403e30 8098ea0f .config console log report ci-android-49-kasan-gce-386
* Struck through repros no longer work on HEAD.