syzbot


WARNING in cfg802154_switch_netns (3)

Status: upstream: reported C repro on 2024/12/04 09:32
Subsystems: wpan
[Documentation on labels]
Reported-by: syzbot+bd5829ba3619f08e2341@syzkaller.appspotmail.com
First crash: 541d, last: 5d23h
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
✨ AI Patch Versions (4)
Version Stage Reported Report Link Job
4 moderation 2026/05/21 01:44 Discussion a51ccb7f-a2f2-4fc2-85fb-a0706afcc0e8
3 moderation 2026/05/19 18:36 Discussion c84689f4-6a93-47bf-80ca-3bc6137dce52
2 moderation 2026/05/18 22:07 Discussion a1cfc84c-7c0f-4340-891d-885fcee80cad
1 moderation 2026/05/13 21:50 Discussion 46668339-436e-4563-9254-73690dc813fe
✨ AI Jobs (5)
ID Workflow Result Correct Bug Created Started Finished Revision Error
a51ccb7f-a2f2-4fc2-85fb-a0706afcc0e8 patch-iteration WARNING in cfg802154_switch_netns (3) 2026/05/21 00:40 2026/05/21 00:40 2026/05/21 01:44 cf874a1cf36318c06202027159ddac14acf00db7
c84689f4-6a93-47bf-80ca-3bc6137dce52 patch-iteration WARNING in cfg802154_switch_netns (3) 2026/05/19 17:25 2026/05/19 17:25 2026/05/19 18:36 1d9407ad5a662c921fc0d659cf022b438c0bde91
a1cfc84c-7c0f-4340-891d-885fcee80cad patch-iteration WARNING in cfg802154_switch_netns (3) 2026/05/18 20:10 2026/05/18 20:10 2026/05/18 22:07 9f74d39908454b73546eaf1b8211b48b66e5c0fe
6f2ae8e8-0cd2-46b3-830d-87c7685751ab assessment-security 💥 WARNING in cfg802154_switch_netns (3) 2026/05/15 14:27 2026/05/15 14:27 2026/05/15 14:44 efdaf0f9b8bfc56ea6d17bea15a64f4591cc712d failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/87fc891088b6083d4229799482ab3725e304a5aa" "-s" "bzImage" "compile_commands.json"]: exit status 2 Root cause: ld.lld: error: undefined symbol: wcslen * * Restart config... * * * General architecture-dependent options * Kprobes (KPROBES) [N/y/?] n Optimize very unlikely/likely branches (JUMP_LABEL) [Y/n/?] y Static key selftest (STATIC_KEYS_SELFTEST) [N/y/?] n Static call selftest (STATIC_CALL_SELFTEST) [N/y/?] n Enable seccomp to safely execute untrusted bytecode (SECCOMP) [Y/n/?] y Show seccomp filter cache status in /proc/pid/seccomp_cache (SECCOMP_CACHE_DEBUG) [N/y/?] n Stack Protector buffer overflow detection (STACKPROTECTOR) [Y/n/?] y Strong Stack Protector (STACKPROTECTOR_STRONG) [Y/n/?] y Link Time Optimization (LTO) > 1. None (LTO_NONE) choice[1]: 1 Enable Clang's AutoFDO build (EXPERIMENTAL) (AUTOFDO_CLANG) [N/y/?] (NEW) Error in reading or end of file. Enable Clang's Propeller build (PROPELLER_CLANG) [N/y/?] (NEW) Error in reading or end of file. Use Clang's Control Flow Integrity (CFI) (CFI_CLANG) [N/y/?] (NEW) Error in reading or end of file. Number of bits to use for ASLR of mmap base address (ARCH_MMAP_RND_BITS) [28] 28 Number of bits to use for ASLR of mmap base address for compatible applications (ARCH_MMAP_RND_COMPAT_BITS) [8] 8 MMU page size > 1. 4KiB pages (PAGE_SIZE_4KB) choice[1]: 1 Provide system calls for 32-bit time_t (COMPAT_32BIT_TIME) [Y/n/?] y Use a virtually-mapped stack (VMAP_STACK) [Y/n/?] y Support for randomizing kernel stack offset on syscall entry (RANDOMIZE_KSTACK_OFFSET) [Y/n/?] y Default state of kernel stack offset randomization (RANDOMIZE_KSTACK_OFFSET_DEFAULT) [N/y/?] n Locking event counts collection (LOCK_EVENT_COUNTS) [N/y/?] n * * Memory initialization * Initialize kernel stack variables at function entry 1. no automatic stack variable initialization (weakest) (INIT_STACK_NONE) 2. pattern-init everything (strongest) (INIT_STACK_ALL_PATTERN) > 3. zero-init everything (strongest and safest) (INIT_STACK_ALL_ZERO) choice[1-3?]: 3 Enable heap memory zeroing on allocation by default (INIT_ON_ALLOC_DEFAULT_ON) [Y/n/?] y Enable heap memory zeroing on free by default (INIT_ON_FREE_DEFAULT_ON) [N/y/?] n Enable register zeroing on function exit (ZERO_CALL_USED_REGS) [N/y/?] (NEW) Error in reading or end of file. * * Kernel hardening options * Randomize layout of sensitive kernel structures > 1. Disable structure layout randomization (RANDSTRUCT_NONE) 2. Fully randomize structure layout (RANDSTRUCT_FULL) (NEW) choice[1-2?]: Error in reading or end of file. * * Compile-time checks and compiler options * Debug information 1. Disable debug information (DEBUG_INFO_NONE) 2. Rely on the toolchain's implicit default DWARF version (DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT) > 3. Generate DWARF Version 4 debuginfo (DEBUG_INFO_DWARF4) 4. Generate DWARF Version 5 debuginfo (DEBUG_INFO_DWARF5) choice[1-4?]: 3 Reduce debugging information (DEBUG_INFO_REDUCED) [N/y/?] n Compressed Debug information > 1. Don't compress debug information (DEBUG_INFO_COMPRESSED_NONE) 2. Compress debugging information with zlib (DEBUG_INFO_COMPRESSED_ZLIB) 3. Compress debugging information with zstd (DEBUG_INFO_COMPRESSED_ZSTD) (NEW) choice[1-3?]: Error in reading or end of file. Produce split debuginfo in .dwo files (DEBUG_INFO_SPLIT) [N/y/?] n Generate BTF type information (DEBUG_INFO_BTF) [N/y/?] n Provide GDB scripts for kernel debugging (GDB_SCRIPTS) [N/y/?] n Warn for stack frames larger than (FRAME_WARN) [2048] 2048 Strip assembler-generated symbols during link (STRIP_ASM_SYMS) [N/y/?] n Install uapi headers to usr/include (HEADERS_INSTALL) [N/y/?] n Make section mismatch errors non-fatal (SECTION_MISMATCH_WARN_ONLY) [Y/n/?] y Force all function address 64B aligned (DEBUG_FORCE_FUNCTION_ALIGN_64B) [N/y/?] n Generate vmlinux.map file when linking (VMLINUX_MAP) [N/y/?] n Force weak per-cpu definitions (DEBUG_FOR
46668339-436e-4563-9254-73690dc813fe patching-compressed WARNING in cfg802154_switch_netns (3) 2026/05/13 20:02 2026/05/13 20:18 2026/05/13 21:50 71153e5d9da49247dc7f1194a9cc04fb90c64f9c
Discussions (6)
Title Replies (including bot) Last reply
[syzbot] [wpan?] WARNING in cfg802154_switch_netns (3) 1 (4) 2026/05/19 14:17
[syzbot] Monthly wpan report (Jan 2026) 0 (1) 2026/01/26 07:12
[syzbot] Monthly wpan report (Nov 2025) 0 (1) 2025/11/24 12:38
[syzbot] Monthly wpan report (Apr 2025) 0 (1) 2025/04/11 13:07
[syzbot] Monthly wpan report (Mar 2025) 0 (1) 2025/03/11 14:05
[syzbot] Monthly wpan report (Jan 2025) 0 (1) 2025/01/07 14:54
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in cfg802154_switch_netns wpan -1 12 808d 847d 0/29 auto-obsoleted due to no activity on 2024/05/17 00:34
linux-5.15 WARNING in cfg802154_switch_netns origin:upstream -1 C error 4 32d 469d 0/3 upstream: reported C repro on 2025/02/10 10:37
upstream WARNING in cfg802154_switch_netns (2) wpan -1 1 653d 649d 0/29 auto-obsoleted due to no activity on 2024/11/17 17:31
Last patch testing requests (8)
Created Duration User Patch Repo Result
2026/03/09 06:53 17m retest repro net-next report log
2025/12/27 01:55 20m retest repro upstream OK log
2025/10/18 01:19 15m retest repro upstream report log
2025/08/09 00:41 21m retest repro upstream report log
2025/05/31 00:14 15m retest repro upstream report log
2025/03/14 22:37 17m retest repro upstream report log
2025/02/07 21:42 18m retest repro net-next report log
2024/12/17 02:25 18m retest repro upstream report log
Fix bisection attempts (8)
Created Duration User Patch Repo Result
2026/04/08 07:14 6m bisect fix net-next error job log
2025/12/29 01:44 3h56m bisect fix net-next OK (0) job log log
2025/11/24 09:03 3h15m bisect fix net-next OK (0) job log log
2025/09/23 21:41 2h04m bisect fix net-next OK (0) job log log
2025/07/17 18:45 3h30m bisect fix net-next OK (0) job log log
2025/06/16 15:37 2h35m bisect fix net-next OK (0) job log log
2025/05/15 20:49 1h27m bisect fix net-next OK (0) job log log
2025/03/31 01:01 2h14m bisect fix net-next OK (0) job log log

Sample crash report:
RSP: 002b:00007ffe8eee9248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffe8eee9260 RCX: 00007f255ac67da9
RDX: 000000000004c084 RSI: 0000000020000100 RDI: 0000000000000006
RBP: 0000000000000001 R08: 00007ffe8eee8fe7 R09: 000055556b883610
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f255acafe7c
R13: 00007f255acaa10f R14: 0000000000000001 R15: 0000000000000001
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5837 at net/ieee802154/core.c:258 cfg802154_switch_netns+0x3c7/0x3d0 net/ieee802154/core.c:258
Modules linked in:
CPU: 0 UID: 0 PID: 5837 Comm: syz-executor125 Not tainted 6.13.0-rc6-syzkaller-00918-g7b24f164cf00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:cfg802154_switch_netns+0x3c7/0x3d0 net/ieee802154/core.c:258
Code: e1 07 38 c1 7c 92 48 89 ef e8 35 dd 86 f6 eb 88 e8 9e 79 20 f6 e9 66 fe ff ff e8 94 79 20 f6 e9 5c fe ff ff e8 8a 79 20 f6 90 <0f> 0b 90 e9 4e fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000406f3c8 EFLAGS: 00010293
RAX: ffffffff8b7f0a96 RBX: 00000000fffffff4 RCX: ffff88802e890000
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: ffff88814479e198 R08: ffffffff8b7f08e0 R09: 1ffffffff2858111
R10: dffffc0000000000 R11: fffffbfff2858112 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88814479e078 R15: dffffc0000000000
FS:  000055556b882380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f255acbe5e7 CR3: 000000007e970000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nl802154_wpan_phy_netns+0x13d/0x210 net/ieee802154/nl802154.c:1292
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2594
 ___sys_sendmsg net/socket.c:2648 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2680
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f255ac67da9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe8eee9248 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffe8eee9260 RCX: 00007f255ac67da9
RDX: 000000000004c084 RSI: 0000000020000100 RDI: 0000000000000006
RBP: 0000000000000001 R08: 00007ffe8eee8fe7 R09: 000055556b883610
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f255acafe7c
R13: 00007f255acaa10f R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (22):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/11 07:37 net-next 7b24f164cf00 6dbc6a9b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2026/01/08 04:53 upstream f0b9d8eb98df d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in cfg802154_switch_netns
2024/12/03 02:10 upstream cdd30ebb1b9f bb326ffb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in cfg802154_switch_netns
2025/08/15 14:40 upstream d7ee5bdce789 1804e95e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in cfg802154_switch_netns
2025/04/11 13:11 upstream 900241a5cc15 12ba9c21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in cfg802154_switch_netns
2024/11/30 09:21 upstream 2ba9f676d0a2 68914665 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in cfg802154_switch_netns
2026/02/12 09:07 upstream 1e83ccd5921a 76a109e2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/11/29 01:43 upstream e538109ac71d d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/10/21 23:56 upstream 6548d364a3e8 252fbbad .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/05/16 23:49 upstream 3c21441eeffc f41472b0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/04/14 03:35 upstream 5aaaedb0cb54 0bd6db41 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/02/28 22:12 upstream 76544811c850 1e7a43e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/02/19 05:57 upstream 6537cfb395f3 9a14138f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2025/01/12 02:03 upstream b62cef9a5c67 6dbc6a9b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in cfg802154_switch_netns
2026/05/13 11:47 net f5b2772d1488 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2026/01/15 11:31 net 4156c3745f06 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2025/01/21 06:46 net d640627663bf 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2024/12/31 16:08 net 4f619d518db9 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in cfg802154_switch_netns
2026/05/19 13:10 net-next 7af2a94f4dcf 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/02/22 03:57 net-next e6a532185daa d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/01/22 04:27 net-next b1754a69e7be da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
2025/01/11 05:09 net-next 7b24f164cf00 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in cfg802154_switch_netns
* Struck through repros no longer work on HEAD.