BUG: unable to handle kernel paging request in bpf_trace

BUG: unable to handle kernel paging request in bpf_trace_run2
Status: fixed on 2021/04/13 19:14
Reported-by: syzbot+cc36fd07553c0512f5f7@syzkaller.appspotmail.com
Fix commit: befe6d946551 tracepoint: Do not fail unregistering a probe due to memory failure
First crash: 439d, last: 276d

Cause bisection: introduced by (bisect log) :
commit 58956317c8de52009d1a38a721474c24aef74fe7
Author: David Ahern <dsahern@gmail.com>
Date: Fri Dec 7 20:24:57 2018 +0000

neighbor: Improve garbage collection

Crash: BUG: corrupted list in neigh_mark_dead (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit befe6d946551d65cddbd32b9cb0170b0249fd5ed
Author: Steven Rostedt (VMware) <rostedt@goodmis.org>
Date: Wed Nov 18 14:34:05 2020 +0000

tracepoint: Do not fail unregistering a probe due to memory failure

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-54	BUG: unable to handle kernel paging request in bpf_trace_run2	C			4	281d	436d	0/1	upstream: reported C repro on 2020/09/22 18:31

Sample crash report:

BUG: unable to handle page fault for address: ffffc90000ed0030
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD aa000067 P4D aa000067 PUD aa169067 PMD a9031067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6868 Comm: syz-executor454 Not tainted 5.9.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bpf_dispatcher_nop_func include/linux/bpf.h:586 [inline]
RIP: 0010:__bpf_trace_run kernel/trace/bpf_trace.c:1887 [inline]
RIP: 0010:bpf_trace_run2+0x12e/0x3d0 kernel/trace/bpf_trace.c:1924
Code: f7 ff 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8e 02 00 00 48 8d 73 38 48 8d 7c 24 28 <ff> 53 30 e8 fa 03 f7 ff e8 45 c8 a4 06 31 ff 89 c3 89 c6 e8 4a 00
RSP: 0018:ffffc900018e7e90 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffc90000ed0000 RCX: ffffffff817f2b88
RDX: 0000000000000000 RSI: ffffc90000ed0038 RDI: ffffc900018e7eb8
RBP: 1ffff9200031cfd3 R08: 0000000000000000 R09: ffffffff8d0b69e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffffc900018e7f58 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000001079880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000ed0030 CR3: 000000009f63f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 trace_sys_enter include/trace/events/syscalls.h:18 [inline]
 syscall_trace_enter kernel/entry/common.c:64 [inline]
 syscall_enter_from_user_mode+0x22c/0x290 kernel/entry/common.c:82
 do_syscall_64+0xf/0x70 arch/x86/entry/common.c:41
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4441da
Code: 25 18 00 00 00 00 74 01 f0 48 0f b1 3d cf f9 28 00 48 39 c2 75 da f3 c3 0f 1f 84 00 00 00 00 00 48 63 ff b8 e4 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 c7 c2 d0 ff ff ff f7
RSP: 002b:00007ffc59deef98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 0000000000001ae1 RCX: 00000000004441da
RDX: 0000000000000000 RSI: 00007ffc59deefa0 RDI: 0000000000000001
RBP: 000000000000ee75 R08: 0000000000001ad4 R09: 0000000001079880
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004022f0
R13: 0000000000402380 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: ffffc90000ed0030
---[ end trace 7a32b71ba0e36806 ]---
RIP: 0010:bpf_dispatcher_nop_func include/linux/bpf.h:586 [inline]
RIP: 0010:__bpf_trace_run kernel/trace/bpf_trace.c:1887 [inline]
RIP: 0010:bpf_trace_run2+0x12e/0x3d0 kernel/trace/bpf_trace.c:1924
Code: f7 ff 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8e 02 00 00 48 8d 73 38 48 8d 7c 24 28 <ff> 53 30 e8 fa 03 f7 ff e8 45 c8 a4 06 31 ff 89 c3 89 c6 e8 4a 00
RSP: 0018:ffffc900018e7e90 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffc90000ed0000 RCX: ffffffff817f2b88
RDX: 0000000000000000 RSI: ffffc90000ed0038 RDI: ffffc900018e7eb8
RBP: 1ffff9200031cfd3 R08: 0000000000000000 R09: ffffffff8d0b69e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffffc900018e7f58 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000001079880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000ed0030 CR3: 000000009f63f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (10):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info
ci-upstream-bpf-kasan-gce	2020/09/22 19:11	bpf	1245008122d7	3e8f6c27	.config	log	report	syz	C
ci-upstream-bpf-kasan-gce	2021/01/05 08:05	bpf	04901aab40ea	2a28ff1f	.config	log	report			info
ci-upstream-bpf-kasan-gce	2020/11/09 20:08	bpf	4e0396c59559	64069d48	.config	log	report			info
ci-upstream-bpf-kasan-gce	2020/10/29 09:48	bpf	c66dca98a24c	f24824d3	.config	log	report			info
ci-upstream-bpf-kasan-gce	2020/10/27 07:22	bpf	435ccfa894e3	8b3eaf58	.config	log	report			info
ci-upstream-bpf-kasan-gce	2020/10/08 12:17	bpf	d82a532a6115	1880b4a9	.config	log	report			info
ci-upstream-bpf-kasan-gce	2020/09/22 18:49	bpf	1245008122d7	3e8f6c27	.config	log	report			info
ci-upstream-bpf-next-kasan-gce	2021/01/05 08:04	bpf-next	482ec343f40a	2a28ff1f	.config	log	report			info
ci-upstream-bpf-next-kasan-gce	2020/10/02 07:46	bpf-next	6208689fb3e6	9602ddf4	.config	log	report			info
ci-upstream-bpf-next-kasan-gce	2020/09/19 21:25	bpf-next	70b971118e07	53ce8104	.config	log	report			info