Messages in this thread | | | Date | Thu, 26 Apr 2018 22:30:02 -0700 | Subject | BUG: unable to handle kernel paging request in process_preds | From | syzbot <> |
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Hello,
syzbot hit the following crash on bpf-next commit 0c90f2243ec67eeacf9624ae52ab43c734fe0e93 (Wed Apr 18 02:46:34 2018 +0000) tools: bpftool: make it easier to feed hex bytes to bpftool syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=b76562b749bb67fca79f
Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5319914659250176 Kernel config: https://syzkaller.appspot.com/x/.config?id=-5947642240294114534 compiler: gcc (GCC) 8.0.1 20180413 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b76562b749bb67fca79f@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer.
BUG: unable to handle kernel paging request at ffff87f9dbf70994 PGD 0 P4D 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 7133 Comm: syz-executor4 Not tainted 4.16.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:predicate_parse kernel/trace/trace_events_filter.c:563 [inline] RIP: 0010:process_preds+0x146c/0x19b0 kernel/trace/trace_events_filter.c:1505 RSP: 0018:ffff880197cc7438 EFLAGS: 00010246 RAX: 0000000000000007 RBX: ffff87f9dbf70990 RCX: 0000000000000000 RDX: 00000000ffffffff RSI: ffffffff817f1ee9 RDI: ffff87f9dbf70994 RBP: ffff880197cc7540 R08: ffff8801b2146540 R09: ffffed003b6246c2 R10: ffffed003b6246c2 R11: ffff8801db123613 R12: dffffc0000000000 R13: ffff8801c1f04fe0 R14: 00000000fffffffe R15: dffffc0000000000 FS: 00007fedc5480700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff87f9dbf70994 CR3: 00000001a0041000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: create_filter+0x1a8/0x370 kernel/trace/trace_events_filter.c:1714 ftrace_profile_set_filter+0x109/0x2b0 kernel/trace/trace_events_filter.c:2042 perf_event_set_filter+0x248/0x1230 kernel/events/core.c:9064 _perf_ioctl+0x84c/0x15e0 kernel/events/core.c:5056 perf_ioctl+0x59/0x80 kernel/events/core.c:5107 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 SYSC_ioctl fs/ioctl.c:708 [inline] SyS_ioctl+0x24/0x30 fs/ioctl.c:706 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x455329 RSP: 002b:00007fedc547fc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fedc54806d4 RCX: 0000000000455329 RDX: 0000000020000100 RSI: 0000000040082406 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000291 R14: 00000000006f6e38 R15: 0000000000000000 Code: ff ff 41 8b 55 04 48 8d 7b 04 48 89 f8 48 c1 e8 03 42 0f b6 0c 20 48 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 08 05 00 00 <44> 8b 7b 04 89 d7 89 95 68 ff ff ff 44 89 fe e8 80 0a f8 ff 8b RIP: predicate_parse kernel/trace/trace_events_filter.c:563 [inline] RSP: ffff880197cc7438 RIP: process_preds+0x146c/0x19b0 kernel/trace/trace_events_filter.c:1505 RSP: ffff880197cc7438 CR2: ffff87f9dbf70994 ---[ end trace 9971f5aefc423124 ]---
--- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com.
syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.
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