WARNING in tracepoint_add_func

WARNING in tracepoint_add_func

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    7a64135f libbpf: Adjust SEC short cut for expected attach ..
git tree:       bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=142782e3100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=dcc6334acae363d4
dashboard link: https://syzkaller.appspot.com/bug?extid=721aa903751db87aa244
compiler:       gcc (GCC) 10.1.0-syz 20200507

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+721aa903751db87aa244@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 16762 at kernel/tracepoint.c:243 tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 16762 Comm: syz-executor.4 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 exc_invalid_op+0x24d/0x400 arch/x86/kernel/traps.c:235
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
Code: 44 24 20 48 8b 5b 08 80 38 00 0f 85 6b 05 00 00 48 8b 44 24 08 48 3b 58 08 0f 85 2d ff ff ff 41 bc ef ff ff ff e8 4c 78 fe ff <0f> 0b e8 45 78 fe ff 44 89 e0 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e
RSP: 0018:ffffc90001497a98 EFLAGS: 00010216
RAX: 000000000000199a RBX: ffffffff89b99040 RCX: ffffc90011df4000
RDX: 0000000000040000 RSI: ffffffff8174d824 RDI: ffff8880979adb30
RBP: ffffffff814f1b80 R08: 0000000000000000 R09: ffffffff89bf9867
R10: 000000000000000a R11: 0000000000000000 R12: 00000000ffffffef
R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880979adb10
 tracepoint_probe_register_prio kernel/tracepoint.c:315 [inline]
 tracepoint_probe_register+0x9c/0xe0 kernel/tracepoint.c:335
 trace_event_reg+0x28f/0x350 kernel/trace/trace_events.c:304
 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline]
 perf_trace_event_init+0x532/0x9a0 kernel/trace/trace_event_perf.c:204
 perf_trace_init+0x176/0x240 kernel/trace/trace_event_perf.c:228
 perf_tp_event_init+0xa2/0x120 kernel/events/core.c:9330
 perf_try_init_event+0x12a/0x560 kernel/events/core.c:10782
 perf_init_event kernel/events/core.c:10834 [inline]
 perf_event_alloc.part.0+0xdee/0x36f0 kernel/events/core.c:11110
 perf_event_alloc kernel/events/core.c:11489 [inline]
 __do_sys_perf_event_open+0x72c/0x2b50 kernel/events/core.c:11605
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb19
Code: Bad RIP value.
RSP: 002b:00007f2d99608c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00000000004fa640 RCX: 000000000045cb19
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000100
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000841 R14: 00000000004cb320 R15: 00007f2d996096d4
Kernel Offset: disabled


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

Re: WARNING in tracepoint_add_func

[Steven Rostedt]

Cc'd Frederic and Peter.

-- Steve


On Sun, 28 Jun 2020 04:29:17 -0700
syzbot <syzbot+721aa903751db87aa244@syzkaller.appspotmail.com> wrote:

> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    7a64135f libbpf: Adjust SEC short cut for expected attach ..
> git tree:       bpf
> console output: https://syzkaller.appspot.com/x/log.txt?x=142782e3100000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=dcc6334acae363d4
> dashboard link: https://syzkaller.appspot.com/bug?extid=721aa903751db87aa244
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> 
> Unfortunately, I don't have any reproducer for this crash yet.
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+721aa903751db87aa244@syzkaller.appspotmail.com
> 
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 16762 at kernel/tracepoint.c:243 tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
> Kernel panic - not syncing: panic_on_warn set ...
> CPU: 1 PID: 16762 Comm: syz-executor.4 Not tainted 5.8.0-rc1-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> Call Trace:
>  __dump_stack lib/dump_stack.c:77 [inline]
>  dump_stack+0x18f/0x20d lib/dump_stack.c:118
>  panic+0x2e3/0x75c kernel/panic.c:231
>  __warn.cold+0x20/0x45 kernel/panic.c:600
>  report_bug+0x1bd/0x210 lib/bug.c:198
>  exc_invalid_op+0x24d/0x400 arch/x86/kernel/traps.c:235
>  asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
> RIP: 0010:tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
> Code: 44 24 20 48 8b 5b 08 80 38 00 0f 85 6b 05 00 00 48 8b 44 24 08 48 3b 58 08 0f 85 2d ff ff ff 41 bc ef ff ff ff e8 4c 78 fe ff <0f> 0b e8 45 78 fe ff 44 89 e0 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e
> RSP: 0018:ffffc90001497a98 EFLAGS: 00010216
> RAX: 000000000000199a RBX: ffffffff89b99040 RCX: ffffc90011df4000
> RDX: 0000000000040000 RSI: ffffffff8174d824 RDI: ffff8880979adb30
> RBP: ffffffff814f1b80 R08: 0000000000000000 R09: ffffffff89bf9867
> R10: 000000000000000a R11: 0000000000000000 R12: 00000000ffffffef
> R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880979adb10
>  tracepoint_probe_register_prio kernel/tracepoint.c:315 [inline]
>  tracepoint_probe_register+0x9c/0xe0 kernel/tracepoint.c:335
>  trace_event_reg+0x28f/0x350 kernel/trace/trace_events.c:304
>  perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline]
>  perf_trace_event_init+0x532/0x9a0 kernel/trace/trace_event_perf.c:204
>  perf_trace_init+0x176/0x240 kernel/trace/trace_event_perf.c:228
>  perf_tp_event_init+0xa2/0x120 kernel/events/core.c:9330
>  perf_try_init_event+0x12a/0x560 kernel/events/core.c:10782
>  perf_init_event kernel/events/core.c:10834 [inline]
>  perf_event_alloc.part.0+0xdee/0x36f0 kernel/events/core.c:11110
>  perf_event_alloc kernel/events/core.c:11489 [inline]
>  __do_sys_perf_event_open+0x72c/0x2b50 kernel/events/core.c:11605
>  do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
>  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> RIP: 0033:0x45cb19
> Code: Bad RIP value.
> RSP: 002b:00007f2d99608c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
> RAX: ffffffffffffffda RBX: 00000000004fa640 RCX: 000000000045cb19
> RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000100
> RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
> R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff
> R13: 0000000000000841 R14: 00000000004cb320 R15: 00007f2d996096d4
> Kernel Offset: disabled
> 
> 
> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
> 
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

Re: WARNING in tracepoint_add_func

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    746f534a tools/libbpf: Avoid counting local symbols in ABI..
git tree:       bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=1317f559900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a0437fdd630bee11
dashboard link: https://syzkaller.appspot.com/bug?extid=721aa903751db87aa244
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=128ff37d900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+721aa903751db87aa244@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 7451 at kernel/tracepoint.c:243 tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7451 Comm: syz-executor.0 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x4a kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
Code: 44 24 20 48 8b 5b 08 80 38 00 0f 85 6b 05 00 00 48 8b 44 24 08 48 3b 58 08 0f 85 2d ff ff ff 41 bc ef ff ff ff e8 7c 68 fe ff <0f> 0b e8 75 68 fe ff 44 89 e0 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e
RSP: 0018:ffffc900056e7ac0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90000e76000 RCX: ffffffff8175d632
RDX: ffff8880a85ae5c0 RSI: ffffffff8175d694 RDI: ffff8880942a1798
RBP: ffffffff82101830 R08: 0000000000000000 R09: ffffffff89c13687
R10: 000000000000000a R11: 0000000000000000 R12: 00000000ffffffef
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880942a1790
 tracepoint_probe_register_prio kernel/tracepoint.c:315 [inline]
 tracepoint_probe_register+0x9c/0xe0 kernel/tracepoint.c:335
 __bpf_probe_register kernel/trace/bpf_trace.c:1950 [inline]
 bpf_probe_register+0x16c/0x1d0 kernel/trace/bpf_trace.c:1955
 bpf_raw_tracepoint_open+0x34e/0xb20 kernel/bpf/syscall.c:2741
 __do_sys_bpf+0x1336/0x4c20 kernel/bpf/syscall.c:4220
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f23d5b85c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000001800 RCX: 000000000045d5b9
RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000011
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fffab077bbf R14: 00007f23d5b869c0 R15: 000000000118cf4c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Re: WARNING in tracepoint_add_func

[syzbot]

syzbot has bisected this issue to:

commit 58956317c8de52009d1a38a721474c24aef74fe7
Author: David Ahern <dsahern@gmail.com>
Date:   Fri Dec 7 20:24:57 2018 +0000

    neighbor: Improve garbage collection

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=146ba853900000
start commit:   746f534a tools/libbpf: Avoid counting local symbols in ABI..
git tree:       bpf
final oops:     https://syzkaller.appspot.com/x/report.txt?x=166ba853900000
console output: https://syzkaller.appspot.com/x/log.txt?x=126ba853900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a0437fdd630bee11
dashboard link: https://syzkaller.appspot.com/bug?extid=721aa903751db87aa244
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=128ff37d900000

Reported-by: syzbot+721aa903751db87aa244@syzkaller.appspotmail.com
Fixes: 58956317c8de ("neighbor: Improve garbage collection")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Re: WARNING in tracepoint_add_func

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    325d0eab Merge branch 'akpm' (patches from Andrew)
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16992c81900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b12e84189082991c
dashboard link: https://syzkaller.appspot.com/bug?extid=721aa903751db87aa244
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17c797b5900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10569c03900000

The issue was bisected to:

commit 58956317c8de52009d1a38a721474c24aef74fe7
Author: David Ahern <dsahern@gmail.com>
Date:   Fri Dec 7 20:24:57 2018 +0000

    neighbor: Improve garbage collection

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=146ba853900000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=166ba853900000
console output: https://syzkaller.appspot.com/x/log.txt?x=126ba853900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+721aa903751db87aa244@syzkaller.appspotmail.com
Fixes: 58956317c8de ("neighbor: Improve garbage collection")

------------[ cut here ]------------
WARNING: CPU: 1 PID: 6872 at kernel/tracepoint.c:243 tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 6872 Comm: syz-executor482 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:tracepoint_add_func+0x254/0x880 kernel/tracepoint.c:243
Code: 44 24 20 48 8b 5b 08 80 38 00 0f 85 6b 05 00 00 48 8b 44 24 08 48 3b 58 08 0f 85 2d ff ff ff 41 bc ef ff ff ff e8 ec 62 fe ff <0f> 0b e8 e5 62 fe ff 44 89 e0 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e
RSP: 0000:ffffc900060f7ac0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90000e76000 RCX: ffffffff8177dc72
RDX: ffff888096766000 RSI: ffffffff8177dcd4 RDI: ffff8880a6b2ec48
RBP: ffffffff8213fae0 R08: 0000000000000000 R09: ffffffff8a0c176b
R10: 000000000000000a R11: 0000000000000000 R12: 00000000ffffffef
R13: 0000000000000002 R14: dffffc0000000000 R15: ffff8880a6b2ec10
 tracepoint_probe_register_prio kernel/tracepoint.c:315 [inline]
 tracepoint_probe_register+0x9c/0xe0 kernel/tracepoint.c:335
 __bpf_probe_register kernel/trace/bpf_trace.c:1950 [inline]
 bpf_probe_register+0x16c/0x1d0 kernel/trace/bpf_trace.c:1955
 bpf_raw_tracepoint_open+0x34e/0xb20 kernel/bpf/syscall.c:2741
 __do_sys_bpf+0x1b2f/0x4c60 kernel/bpf/syscall.c:4220
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4415a9
Code: e8 ac e8 ff ff 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 8b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc28dd5d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004415a9
RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000011
RBP: 0000000000010308 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004023c0
R13: 0000000000402450 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..