pkg/report: fix matching for traps in kernel mode

We already have a pattern to match "Fatal trap N: ..." panics, but the
format of our backtraces has changed since it was added.  Add another
pattern which correctly matches a few instances generated by syzbot.

4 files changed, 148 insertions, 0 deletions

diff --git a/pkg/report/testdata/freebsd/report/5 b/pkg/report/testdata/freebsd/report/5
new file mode 100644
index 000000000..dcb9f7e6e
--- /dev/null
+++ b/pkg/report/testdata/freebsd/report/5
@@ -0,0 +1,39 @@
+TITLE: Fatal trap 9: general protection fault in unp_dispose
+
+Fatal trap 9: general protection fault while in kernel mode
+cpuid = 0; apic id = 00
+instruction pointer = 0x20:0xffffffff81163cf5
+stack pointer         = 0x28:0xfffffe001fa0e610
+frame pointer         = 0x28:0xfffffe001fa0e650
+code segment  = base 0x0, limit 0xfffff, type 0x1b
+   = DPL 0, pres 1, long 1, def32 0, gran 1
+processor eflags = interrupt enabled, resume, IOPL = 0
+current process  = 907 (syz-executor9083768)
+trap number  = 9
+panic: general protection fault
+cpuid = 0
+time = 1552881695
+KDB: stack backtrace:
+db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001fa0e2e0
+vpanic() at vpanic+0x1e0/frame 0xfffffe001fa0e340
+panic() at panic+0x43/frame 0xfffffe001fa0e3a0
+trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe001fa0e420
+trap() at trap+0xba/frame 0xfffffe001fa0e540
+calltrap() at calltrap+0x8/frame 0xfffffe001fa0e540
+--- trap 0x9, rip = 0xffffffff81163cf5, rsp = 0xfffffe001fa0e610, rbp = 0xfffffe001fa0e650 ---
+unp_dispose() at unp_dispose+0xa5/frame 0xfffffe001fa0e650
+sofree() at sofree+0x42c/frame 0xfffffe001fa0e6b0
+soclose() at soclose+0x5b3/frame 0xfffffe001fa0e730
+_fdrop() at _fdrop+0x3a/frame 0xfffffe001fa0e760
+closef() at closef+0x27d/frame 0xfffffe001fa0e7f0
+fdescfree_fds() at fdescfree_fds+0xbd/frame 0xfffffe001fa0e840
+fdescfree() at fdescfree+0x58a/frame 0xfffffe001fa0e900
+exit1() at exit1+0x780/frame 0xfffffe001fa0e970
+sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe001fa0e980
+amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001fa0eab0
+fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001fa0eab0
+--- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x447a0a, rsp = 0x7fffffffea68, rbp = 0x7fffffffea80 ---
+KDB: enter: panic
+[ thread pid 907 tid 100096 ]
+Stopped at      kdb_enter+0x6a: movq    $0,kdb_why
+db> 
diff --git a/pkg/report/testdata/freebsd/report/6 b/pkg/report/testdata/freebsd/report/6
new file mode 100644
index 000000000..3f7093f78
--- /dev/null
+++ b/pkg/report/testdata/freebsd/report/6
@@ -0,0 +1,35 @@
+TITLE: Fatal trap 9: general protection fault in sctp_inpcb_bind
+
+Fatal trap 9: general protection fault while in kernel mode
+cpuid = 0; apic id = 00
+instruction pointer = 0x20:0xffffffff813441d5
+stack pointer         = 0x28:0xfffffe001fa6d770
+frame pointer         = 0x28:0xfffffe001fa6d820
+code segment  = base 0x0, limit 0xfffff, type 0x1b
+   = DPL 0, pres 1, long 1, def32 0, gran 1
+processor eflags = interrupt enabled, resume, IOPL = 0
+current process  = 79848 (syz-executor.0)
+trap number  = 9
+panic: general protection fault
+cpuid = 0
+time = 17
+KDB: stack backtrace:
+db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001fa6d440
+vpanic() at vpanic+0x1e0/frame 0xfffffe001fa6d4a0
+panic() at panic+0x43/frame 0xfffffe001fa6d500
+trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe001fa6d580
+trap() at trap+0xba/frame 0xfffffe001fa6d6a0
+calltrap() at calltrap+0x8/frame 0xfffffe001fa6d6a0
+--- trap 0x9, rip = 0xffffffff813441d5, rsp = 0xfffffe001fa6d770, rbp = 0xfffffe001fa6d820 ---
+sctp_inpcb_bind() at sctp_inpcb_bind+0x3f5/frame 0xfffffe001fa6d820
+sctp_connect() at sctp_connect+0x266/frame 0xfffffe001fa6d880
+soconnectat() at soconnectat+0x183/frame 0xfffffe001fa6d8e0
+kern_connectat() at kern_connectat+0x1ff/frame 0xfffffe001fa6d940
+sys_connect() at sys_connect+0xd9/frame 0xfffffe001fa6d980
+amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001fa6dab0
+fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001fa6dab0
+--- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdfffdf38, rbp = 0x3 ---
+KDB: enter: panic
+[ thread pid 79848 tid 101052 ]
+Stopped at      kdb_enter+0x6a: movq    $0,kdb_why
+db> 
diff --git a/pkg/report/testdata/freebsd/report/7 b/pkg/report/testdata/freebsd/report/7
new file mode 100644
index 000000000..9c3ece63c
--- /dev/null
+++ b/pkg/report/testdata/freebsd/report/7
@@ -0,0 +1,37 @@
+TITLE: Fatal trap 12: page fault in vm_page_unhold_pages
+
+Fatal trap 12: page fault while in kernel mode
+cpuid = 0; apic id = 00
+fault virtual address = 0x30
+fault code  = supervisor read data  , page not present
+instruction pointer = 0x20:0xffffffff8156d61a
+stack pointer         = 0x28:0xfffffe001facc7a0
+frame pointer         = 0x28:0xfffffe001facc7e0
+code segment  = base 0x0, limit 0xfffff, type 0x1b
+   = DPL 0, pres 1, long 1, def32 0, gran 1
+processor eflags = interrupt enabled, resume, IOPL = 0
+current process  = 2213 (syz-executor.0)
+trap number  = 12
+panic: page fault
+cpuid = 0
+time = 4
+KDB: stack backtrace:
+db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001facc400
+vpanic() at vpanic+0x1e0/frame 0xfffffe001facc460
+panic() at panic+0x43/frame 0xfffffe001facc4c0
+trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe001facc540
+trap_pfault() at trap_pfault+0x9f/frame 0xfffffe001facc5b0
+trap() at trap+0x44d/frame 0xfffffe001facc6d0
+calltrap() at calltrap+0x8/frame 0xfffffe001facc6d0
+--- trap 0xc, rip = 0xffffffff8156d61a, rsp = 0xfffffe001facc7a0, rbp = 0xfffffe001facc7e0 ---
+vm_page_unhold_pages() at vm_page_unhold_pages+0x5a/frame 0xfffffe001facc7e0
+pipe_write() at pipe_write+0x16d8/frame 0xfffffe001facc8b0
+dofilewrite() at dofilewrite+0xfd/frame 0xfffffe001facc910
+kern_writev() at kern_writev+0x66/frame 0xfffffe001facc950
+sys_writev() at sys_writev+0x50/frame 0xfffffe001facc980
+amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001faccab0
+fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001faccab0
+--- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdfffdf38, rbp = 0x3 ---
+KDB: enter: panic
+[ thread pid 2213 tid 100330 ]
+Stopped at      kdb_enter+0x6a: movq    $0,kdb_why
diff --git a/pkg/report/testdata/freebsd/report/8 b/pkg/report/testdata/freebsd/report/8
new file mode 100644
index 000000000..d8c99cb6e
--- /dev/null
+++ b/pkg/report/testdata/freebsd/report/8
@@ -0,0 +1,37 @@
+TITLE: Fatal trap 12: page fault in inp_freemoptions
+
+Fatal trap 12: page fault while in kernel mode
+cpuid = 0; apic id = 00
+fault virtual address = 0x18
+fault code  = supervisor read data  , page not present
+instruction pointer = 0x20:0xffffffff812beb87
+stack pointer         = 0x28:0xfffffe0016abb8c0
+frame pointer         = 0x28:0xfffffe0016abb900
+code segment  = base 0x0, limit 0xfffff, type 0x1b
+   = DPL 0, pres 1, long 1, def32 0, gran 1
+processor eflags = interrupt enabled, resume, IOPL = 0
+current process  = 0 (softirq_0)
+trap number  = 12
+panic: page fault
+cpuid = 0
+time = 1552661135
+KDB: stack backtrace:
+db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0016abb520
+vpanic() at vpanic+0x1e0/frame 0xfffffe0016abb580
+panic() at panic+0x43/frame 0xfffffe0016abb5e0
+trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe0016abb660
+trap_pfault() at trap_pfault+0x9f/frame 0xfffffe0016abb6d0
+trap() at trap+0x44d/frame 0xfffffe0016abb7f0
+calltrap() at calltrap+0x8/frame 0xfffffe0016abb7f0
+--- trap 0xc, rip = 0xffffffff812beb87, rsp = 0xfffffe0016abb8c0, rbp = 0xfffffe0016abb900 ---
+inp_freemoptions() at inp_freemoptions+0x177/frame 0xfffffe0016abb900
+in_pcbfree_deferred() at in_pcbfree_deferred+0x224/frame 0xfffffe0016abb960
+epoch_call_task() at epoch_call_task+0x262/frame 0xfffffe0016abb9c0
+gtaskqueue_run_locked() at gtaskqueue_run_locked+0x13e/frame 0xfffffe0016abba20
+gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0xdd/frame 0xfffffe0016abba60
+fork_exit() at fork_exit+0xb0/frame 0xfffffe0016abbab0
+fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0016abbab0
+--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
+KDB: enter: panic
+[ thread pid 0 tid 100012 ]
+Stopped at      kdb_enter+0x6a: movq    $0,kdb_why