From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot+9b37e75e781b5e400f65@syzkaller.appspotmail.com (syzbot) Date: Wed, 26 Sep 2018 00:52:04 -0700 Subject: general protection fault in __aa_lookupn_ns Message-ID: <00000000000095faa90576c17f86@google.com> To: linux-security-module@vger.kernel.org List-Id: linux-security-module.vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: dad486875956 Add linux-next specific files for 20180924 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15da1fd1400000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e793f6258a2ee8f dashboard link: https://syzkaller.appspot.com/bug?extid=9b37e75e781b5e400f65 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=142c6769400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12af5556400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9b37e75e781b5e400f65 at syzkaller.appspotmail.com audit: type=1400 audit(1537815185.042:10): apparmor="DENIED" operation="stack_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=5560 comm="syz-executor398" audit: type=1400 audit(1537815185.072:11): apparmor="DENIED" operation="stack_onexec" info="label not found" error=-2 profile="unconfined" name="&&" pid=5561 comm="syz-executor398" 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 CPU: 0 PID: 5565 Comm: syz-executor398 Not tainted 4.19.0-rc5-next-20180924+ #78 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memcmp+0x28/0x160 lib/string.c:856 Code: 00 00 48 85 d2 0f 84 0a 01 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 f9 48 89 e5 48 c1 e9 03 41 54 53 48 89 fb 48 83 ec 18 <0f> b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 98 00 00 00 RSP: 0018:ffff8801bbf0ef98 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: 000000000836b156 RDX: 0000000000000002 RSI: ffffffff885fb8e0 RDI: 0000000041b58ab3 RBP: ffff8801bbf0efc0 R08: ffff8801d8628280 R09: ffffed003b585b57 R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: 0000000000000002 R13: ffffffff885fb8e0 R14: ffff8801fda67e03 R15: dffffc0000000000 FS: 0000000000bf8880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006cb090 CR3: 00000001d884a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strnstr+0x4b/0x70 lib/string.c:934 __aa_lookupn_ns+0xc1/0x570 security/apparmor/policy_ns.c:209 aa_lookupn_ns+0x88/0x1e0 security/apparmor/policy_ns.c:240 aa_fqlookupn_profile+0x1b9/0x1010 security/apparmor/policy.c:468 fqlookupn_profile+0x80/0xc0 security/apparmor/label.c:1844 aa_label_strn_parse+0xa3a/0x1230 security/apparmor/label.c:1908 aa_label_parse+0x42/0x50 security/apparmor/label.c:1943 aa_change_profile+0x513/0x3510 security/apparmor/domain.c:1362 apparmor_setprocattr+0xab7/0x1180 security/apparmor/lsm.c:759 security_setprocattr+0x66/0xc0 security/security.c:1336 proc_pid_attr_write+0x301/0x540 fs/proc/base.c:2555 __vfs_write+0x119/0x9f0 fs/read_write.c:485 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440d49 Code: e8 cc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcbaaf0448 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440d49 RDX: 0000000000000009 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 R10: 0000000000bf8880 R11: 0000000000000213 R12: 0000000000008f07 R13: 0000000000401d20 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 848eed09df759209 ]--- RIP: 0010:memcmp+0x28/0x160 lib/string.c:856 Code: 00 00 48 85 d2 0f 84 0a 01 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 f9 48 89 e5 48 c1 e9 03 41 54 53 48 89 fb 48 83 ec 18 <0f> b6 04 01 48 89 f9 83 e1 07 38 c8 7f 08 84 c0 0f 85 98 00 00 00 RSP: 0018:ffff8801bbf0ef98 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: 000000000836b156 RDX: 0000000000000002 RSI: ffffffff885fb8e0 RDI: 0000000041b58ab3 RBP: ffff8801bbf0efc0 R08: ffff8801d8628280 R09: ffffed003b585b57 R10: ffffed003b585b57 R11: ffff8801dac2dabb R12: 0000000000000002 R13: ffffffff885fb8e0 R14: ffff8801fda67e03 R15: dffffc0000000000 FS: 0000000000bf8880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006cb090 CR3: 00000001d884a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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