Bug#995109: linux-image-5.14.0-1-amd64: kernel WARNING caused by samba nmbd (and related to Tomoyo)
Control: tags -1 + confirmed upstream fixed-upstream pending
Hi Laurent,
On Sun, Sep 26, 2021 at 01:09:36PM +0200, Laurent Bonnaud wrote:
> Package: src:linux
> Version: 5.14.6-2
> Severity: important
>
>
> Dear Maintainer,
>
> on a system that is used as a Samba server, the kernel logs are spammed by WARNINGs such as this one:
>
> Sep 26 07:42:40 hostname kernel: ------------[ cut here ]------------
> Sep 26 07:42:40 hostname kernel: Buffer overflow detected (8 < 192)!
> Sep 26 07:42:40 hostname kernel: WARNING: CPU: 1 PID: 561 at include/linux/thread_info.h:200 ethtool_rxnfc_copy_to_user+0x2b/0xb0
> Sep 26 07:42:40 hostname kernel: Modules linked in: ipmi_ssif intel_rapl_msr intel_rapl_common skx_edac nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp quota_v2 quota_tree coretemp nls_ascii nls_cp437 vfat fat ghash_clmulni_intel m>
> Sep 26 07:42:40 hostname kernel: CPU: 1 PID: 561 Comm: nmbd Not tainted 5.14.0-1-amd64 #1 Debian 5.14.6-2
> Sep 26 07:42:40 hostname kernel: Hardware name: Dell Inc. PowerEdge R540/0NJK2F, BIOS 2.12.2 07/09/2021
> Sep 26 07:42:40 hostname kernel: RIP: 0010:ethtool_rxnfc_copy_to_user+0x2b/0xb0
> Sep 26 07:42:40 hostname kernel: Code: 1f 44 00 00 41 55 65 48 8b 04 25 c0 7b 01 00 41 54 55 53 f6 40 10 02 75 23 be 08 00 00 00 48 c7 c7 28 16 30 a7 e8 64 4c 14 00 <0f> 0b 41 bc f2 ff ff ff 5b 44 89 e0 5d 41 5c 41 5d c3 48 89 fb 49
> Sep 26 07:42:40 hostname kernel: RSP: 0018:ffffab4680cefbf8 EFLAGS: 00010282
> Sep 26 07:42:40 hostname kernel: RAX: 0000000000000000 RBX: ffffffffc06204e0 RCX: ffff94bfe0098888
> Sep 26 07:42:40 hostname kernel: RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff94bfe0098880
> Sep 26 07:42:40 hostname kernel: RBP: ffff94b8d11c0000 R08: 0000000000000000 R09: ffffab4680cefa20
> Sep 26 07:42:40 hostname kernel: R10: ffffab4680cefa18 R11: ffffffffa78d3588 R12: 0000000000000000
> Sep 26 07:42:40 hostname kernel: R13: 00007fff9b14aa20 R14: 0000000000000000 R15: ffffab4680cefc28
> Sep 26 07:42:40 hostname kernel: FS: 00007f59e1dcfa40(0000) GS:ffff94bfe0080000(0000) knlGS:0000000000000000
> Sep 26 07:42:40 hostname kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> Sep 26 07:42:40 hostname kernel: CR2: 0000557f575974d8 CR3: 0000000109a38002 CR4: 00000000007706e0
> Sep 26 07:42:40 hostname kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> Sep 26 07:42:40 hostname kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Sep 26 07:42:40 hostname kernel: PKRU: 55555554
> Sep 26 07:42:40 hostname kernel: Call Trace:
> Sep 26 07:42:40 hostname kernel: ethtool_get_rxnfc+0xcb/0x1b0
> Sep 26 07:42:40 hostname kernel: dev_ethtool+0xb4b/0x28f0
> Sep 26 07:42:40 hostname kernel: ? sk_prot_alloc+0x30/0x120
> Sep 26 07:42:40 hostname kernel: ? tomoyo_init_request_info+0x8f/0xb0
> Sep 26 07:42:40 hostname kernel: ? tomoyo_path_number_perm+0x66/0x1d0
> Sep 26 07:42:40 hostname kernel: dev_ioctl+0x156/0x480
> Sep 26 07:42:40 hostname kernel: sock_do_ioctl+0x9b/0x130
> Sep 26 07:42:40 hostname kernel: sock_ioctl+0x23a/0x320
> Sep 26 07:42:40 hostname kernel: __x64_sys_ioctl+0x83/0xb0
> Sep 26 07:42:40 hostname kernel: do_syscall_64+0x3b/0xc0
> Sep 26 07:42:40 hostname kernel: entry_SYSCALL_64_after_hwframe+0x44/0xae
> Sep 26 07:42:40 hostname kernel: RIP: 0033:0x7f59e573bcc7
> Sep 26 07:42:40 hostname kernel: Code: 00 00 00 48 8b 05 c9 91 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 99 91 0c 00 f7 d8 64 89 01 48
> Sep 26 07:42:40 hostname kernel: RSP: 002b:00007fff9b14a9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> Sep 26 07:42:40 hostname kernel: RAX: ffffffffffffffda RBX: 0000557f575950f0 RCX: 00007f59e573bcc7
> Sep 26 07:42:40 hostname kernel: RDX: 00007fff9b14a9f0 RSI: 0000000000008946 RDI: 000000000000000f
> Sep 26 07:42:40 hostname kernel: RBP: 000000000000000f R08: 0000000000000000 R09: 003166307331706e
> Sep 26 07:42:40 hostname kernel: R10: 000000000000000d R11: 0000000000000246 R12: 0000557f575952a0
> Sep 26 07:42:40 hostname kernel: R13: 00007fff9b14a9f0 R14: 0000557f575970d0 R15: 0000557f57597174
> Sep 26 07:42:40 hostname kernel: ---[ end trace 387ad7d8b4db28d7 ]---
> Sep 26 07:42:40 hostname kernel: ------------[ cut here ]------------
I believe this is fixed by
https://salsa.debian.org/kernel-team/linux/-/commit/b7f5082c34ea43622ebd9cd42f5fdd7b5ed49761
pending for the next upload.
Regards,
Salvatore
Reply to: