syzbot


WARNING in bpf_probe_read_user

Status: upstream: reported C repro on 2023/11/04 18:36
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+9fef5b251417ebc881c0@syzkaller.appspotmail.com
First crash: 643d, last: 21m
Fix commit to backport (bisect log) :
tree: upstream
commit d319f344561de23e810515d109c7278919bff7b0
Author: Alexei Starovoitov <ast@kernel.org>
Date: Mon Apr 10 17:43:44 2023 +0000

  mm: Fix copy_from_user_nofault().

  
Bug presence (2)
Date Name Commit Repro Result
2023/11/05 linux-5.15.y (ToT) 12952a23a5da C [report] WARNING in bpf_probe_read_user
2023/11/05 upstream (ToT) aea6bf908d73 C Didn't crash
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/11/05 20:34 4h18m fix candidate upstream OK (1) job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 20 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ed f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 70 f4 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000da7848 EFLAGS: 00010246
RAX: ffffffff819ecfb0 RBX: 0000000000000000 RCX: ffff88813fe70000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff6e19
R10: fffffbfff1ff6e19 R11: 1ffffffff1ff6e18 R12: ffff88813fe71788
R13: dffffc0000000000 R14: ffffc90000da78a8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00693d000 CR3: 0000000073964000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 </TASK>
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 panic+0x2c9/0x7f0 kernel/panic.c:309
 check_panic_on_warn kernel/panic.c:229 [inline]
 __warn+0x248/0x2b0 kernel/panic.c:680
 report_bug+0x1b7/0x2e0 lib/bug.c:199
 handle_bug+0x3a/0x70 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:259
 asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:604
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ed f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 70 f4 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000da7848 EFLAGS: 00010246
RAX: ffffffff819ecfb0 RBX: 0000000000000000 RCX: ffff88813fe70000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff6e19
R10: fffffbfff1ff6e19 R11: 1ffffffff1ff6e18 R12: ffff88813fe71788
R13: dffffc0000000000 R14: ffffc90000da78a8 R15: 0000000000000000
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (99593):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/09 07:01 linux-5.15.y c79648372d02 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/09 06:31 linux-5.15.y c79648372d02 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/09 06:02 linux-5.15.y c79648372d02 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/09 04:27 linux-5.15.y c79648372d02 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 22:49 linux-5.15.y c79648372d02 32a0e5ed .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 13:20 linux-5.15.y c79648372d02 04cffc22 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 12:12 linux-5.15.y c79648372d02 04cffc22 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 09:46 linux-5.15.y c79648372d02 9a42d6b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 09:16 linux-5.15.y c79648372d02 9a42d6b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 07:19 linux-5.15.y c79648372d02 9a42d6b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 21:31 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 20:57 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 20:13 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 19:33 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 18:52 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 17:49 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 11:07 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 10:25 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 09:35 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 08:37 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 06:03 linux-5.15.y c79648372d02 ffe1dd46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/05 05:21 linux-5.15.y c79648372d02 f5bcc8dc .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/05 04:40 linux-5.15.y c79648372d02 f5bcc8dc .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/03 22:21 linux-5.15.y c79648372d02 7368264b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/03 14:51 linux-5.15.y c79648372d02 7368264b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/03 04:18 linux-5.15.y c79648372d02 7368264b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/01 14:41 linux-5.15.y c79648372d02 40127d41 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/30 22:12 linux-5.15.y c79648372d02 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/30 21:38 linux-5.15.y c79648372d02 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/30 20:25 linux-5.15.y c79648372d02 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/30 11:31 linux-5.15.y c79648372d02 f8f2b4da .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/28 02:29 linux-5.15.y c79648372d02 fb8f743d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/27 12:15 linux-5.15.y c79648372d02 fb8f743d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/26 19:42 linux-5.15.y c79648372d02 fb8f743d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/24 14:31 linux-5.15.y c79648372d02 65d60d73 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/20 14:22 linux-5.15.y c79648372d02 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/19 21:35 linux-5.15.y c79648372d02 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/19 02:14 linux-5.15.y c79648372d02 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/17 09:03 linux-5.15.y 89950c454265 44f8051e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/09 19:07 linux-5.15.y 3dea0e7f549e f4e5e155 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/04 21:01 linux-5.15.y 3dea0e7f549e d869b261 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2023/11/04 23:31 linux-5.15.y 12952a23a5da 500bfdc4 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/07/16 16:04 linux-5.15.y 89950c454265 124ec9cc .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/09 03:36 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/09 02:32 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/09 01:28 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/09 00:43 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/09 00:02 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 22:57 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 21:25 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 19:36 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 18:35 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 17:31 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 17:00 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 13:19 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 12:08 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 11:29 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 10:40 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 09:43 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/08 07:03 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 06:01 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 05:39 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 04:39 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/08 02:25 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 22:49 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 21:14 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 20:45 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 19:58 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 19:11 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 18:46 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 17:30 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 17:14 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 07:55 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 07:23 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 06:38 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 06:01 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 05:26 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 04:47 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2025/08/07 03:27 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/07 02:08 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 23:58 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 23:50 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 22:36 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in bpf_probe_read_user
2025/08/06 17:24 linux-5.15.y c79648372d02 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
2023/11/04 18:36 linux-5.15.y 12952a23a5da 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in bpf_probe_read_user
* Struck through repros no longer work on HEAD.