WARNING in bpf_tracing_link_release

Status: upstream: reported C repro on 2026/09/14 12:18
Reported-by: syzbot+3699009eeecfc82b91d3@syzkaller.appspotmail.com
First crash: 60d, last: 13h16m
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in bpf_tracing_link_release -1 syz, C 6 5h19m 19d 0/3 upstream: reported C repro on 2026/10/24 18:16
linux-6.1 WARNING in bpf_tracing_link_release origin:upstream -1 syz, C 13 5d11h 58d 0/3 upstream: reported C repro on 2026/09/15 20:49

Sample crash report:
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f02fd425fac R14: 00007f02fd425fa0 R15: 00007f02fd425fa0
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5926 at kernel/bpf/syscall.c:3128 bpf_tracing_link_release+0xc6/0xe0 kernel/bpf/syscall.c:3127
Modules linked in:
CPU: 0 PID: 5926 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:bpf_tracing_link_release+0xc6/0xe0 kernel/bpf/syscall.c:3127
Code: 74 15 e8 9d f0 ef ff 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 8d a1 fe ff e8 88 f0 ef ff 5b 41 5c 41 5e 41 5f 5d c3 e8 7a f0 ef ff <0f> 0b 43 80 3c 3c 00 75 96 eb 9c 66 2e 0f 1f 84 00 00 00 00 00 0f
RSP: 0018:ffffc90004567dc8 EFLAGS: 00010293
RAX: ffffffff81979ad6 RBX: ffff888142310100 RCX: ffff8880248f3c00
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: 00000000fffffff4 R08: ffffc90004567d07 R09: 1ffff920008acfa0
R10: dffffc0000000000 R11: fffff520008acfa1 R12: 1ffff11028462031
R13: ffff88802aeab0fd R14: ffff888142310188 R15: dffffc0000000000
FS:  000055556424b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34963fff CR3: 000000002cc38000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 bpf_link_free+0x123/0x300 kernel/bpf/syscall.c:2921
 bpf_link_put_direct kernel/bpf/syscall.c:2961 [inline]
 bpf_link_release+0x6e/0x80 kernel/bpf/syscall.c:2968
 __fput+0x221/0x940 fs/file_table.c:418
 __do_sys_close fs/open.c:1574 [inline]
 __se_sys_close+0x15c/0x1e0 fs/open.c:1559
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f02fd19e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff469fb858 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f02fd425fa0 RCX: 00007f02fd19e159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fff469fb8c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f02fd425fac R14: 00007f02fd425fa0 R15: 00007f02fd425fa0
 </TASK>

Crashes (27):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/14 18:01 linux-6.6.y 79643295eba1 81a27d1a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/13 00:12 linux-6.6.y 5139929c698c c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/12 14:18 linux-6.6.y 5139929c698c 8d68b303 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/11 17:43 linux-6.6.y 5139929c698c e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/07 10:48 linux-6.6.y 5139929c698c 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/03 17:00 linux-6.6.y b5a1dc3ad482 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/03 17:00 linux-6.6.y b5a1dc3ad482 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/02 03:47 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/02 03:38 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/11/01 11:59 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/29 09:16 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/28 17:41 linux-6.6.y 0aebf2870d53 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/23 16:00 linux-6.6.y 0aebf2870d53 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/23 13:49 linux-6.6.y 0aebf2870d53 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/20 04:47 linux-6.6.y cecd39af8a1a 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/20 04:39 linux-6.6.y cecd39af8a1a 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/19 20:43 linux-6.6.y cecd39af8a1a 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/19 18:35 linux-6.6.y cecd39af8a1a 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/19 18:33 linux-6.6.y cecd39af8a1a 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/17 12:00 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/17 11:40 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/09 16:11 linux-6.6.y a91a6aa9253c b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/09 16:06 linux-6.6.y a91a6aa9253c b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/10/06 19:28 linux-6.6.y a91a6aa9253c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/09/29 21:21 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/09/14 17:09 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
2026/09/14 12:18 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf WARNING in bpf_tracing_link_release
* Struck through repros no longer work on HEAD.