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Message-ID: <202509241632.3a1187a5-lkp@intel.com>
Date: Thu, 25 Sep 2025 13:46:46 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Christian Brauner <brauner@...nel.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
<oliver.sang@...el.com>
Subject: [linux-next:master] [ipc] 74b24a582e:
Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP_KASAN
Hello,
we reported
"[brauner-github:namespace-6.18.file_handles] [ipc] c8e087bf68: BUG:kernel_NULL_pointer_dereference,address"
in
https://lore.kernel.org/all/202509231700.dff6cd4d-lkp@intel.com/
now we noticed this commit is in linux-next/master and found similar issues
in our tests. so report again FYI.
kernel test robot noticed "Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP_KASAN" on:
commit: 74b24a582e1ff3960f0454f57afc2bcdbc52562e ("ipc: support ns lookup")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: boot
config: x86_64-randconfig-007-20250922
compiler: clang-20
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+----------------------------------------------------------------------------------+------------+------------+
| | 7c60593985 | 74b24a582e |
+----------------------------------------------------------------------------------+------------+------------+
| boot_successes | 12 | 0 |
| boot_failures | 0 | 12 |
| Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]SMP_KASAN | 0 | 12 |
| KASAN:null-ptr-deref_in_range[#-#] | 0 | 12 |
| RIP:__ns_tree_add_raw | 0 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 12 |
+----------------------------------------------------------------------------------+------------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202509241632.3a1187a5-lkp@intel.com
[ 2.135918][ T1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN
[ 2.137777][ T1] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[ 2.137777][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-rc4-00022-g74b24a582e1f #1 PREEMPT 38d15ed75bef35c8d0bf70c9ae8ec80a13adc51c
[ 2.137777][ T1] RIP: 0010:__ns_tree_add_raw (kbuild/src/consumer/kernel/nstree.c:95)
[ 2.137777][ T1] Code: 45 d0 4c 8d 70 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 ec 09 5e 00 4d 8b 36 49 83 c6 10 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 1c 04 00 00 41 8b 1e 4d 8d b4 24 90 00
All code
========
0: 45 d0 4c 8d 70 rex.RB rorb $1,0x70(%r13,%rcx,4)
5: 08 4c 89 f0 or %cl,-0x10(%rcx,%rcx,4)
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
12: 74 08 je 0x1c
14: 4c 89 f7 mov %r14,%rdi
17: e8 ec 09 5e 00 call 0x5e0a08
1c: 4d 8b 36 mov (%r14),%r14
1f: 49 83 c6 10 add $0x10,%r14
23: 4c 89 f0 mov %r14,%rax
26: 48 c1 e8 03 shr $0x3,%rax
2a:* 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 1c 04 00 00 jne 0x453
37: 41 8b 1e mov (%r14),%ebx
3a: 4d rex.WRB
3b: 8d .byte 0x8d
3c: b4 24 mov $0x24,%ah
3e: 90 nop
...
Code starting with the faulting instruction
===========================================
0: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
5: 84 c0 test %al,%al
7: 0f 85 1c 04 00 00 jne 0x429
d: 41 8b 1e mov (%r14),%ebx
10: 4d rex.WRB
11: 8d .byte 0x8d
12: b4 24 mov $0x24,%ah
14: 90 nop
...
[ 2.137777][ T1] RSP: 0000:ffffc9000001f9f8 EFLAGS: 00010202
[ 2.137777][ T1] RAX: 0000000000000002 RBX: ffffffff85927a58 RCX: 0000000000000000
[ 2.137777][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 2.137777][ T1] RBP: ffffc9000001fa78 R08: 0000000000000000 R09: 0000000000000000
[ 2.137777][ T1] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85927a40
[ 2.137777][ T1] R13: dffffc0000000000 R14: 0000000000000010 R15: 1ffffffff0bf3eac
[ 2.137777][ T1] FS: 0000000000000000(0000) GS:ffff888428598000(0000) knlGS:0000000000000000
[ 2.137777][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.137777][ T1] CR2: ffff88843ffff000 CR3: 00000000058b7000 CR4: 00000000000406b0
[ 2.137777][ T1] Call Trace:
[ 2.137777][ T1] <TASK>
[ 2.137777][ T1] ? ipc_ns_init (kbuild/src/consumer/ipc/shm.c:153)
[ 2.137777][ T1] ? __cfi_ipc_ns_init (kbuild/src/consumer/ipc/shm.c:150)
[ 2.137777][ T1] ipc_ns_init (kbuild/src/consumer/ipc/shm.c:153)
[ 2.137777][ T1] do_one_initcall (kbuild/src/consumer/init/main.c:1269)
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250924/202509241632.3a1187a5-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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