Bug#920177: linux-image-4.19.0-2-rt-amd64-unsigned: BUG while removing the sunrpc module
Control: tags -1 + moreinfo
On Tue, Jan 22, 2019 at 12:20:38PM +0100, Laurent Bonnaud wrote:
> Subject: linux-image-4.19.0-2-rt-amd64-unsigned: BUG
> Package: src:linux
> Version: 4.19.16-1
> Severity: normal
>
>
> Dear Maintainer,
>
> I was trying to remove the sunrpc module from the kernel and got the
> following BUG and backtrace.
>
> Note that the kernel is tainted because of this previous error that is
> unrelated:
>
> [1.514708] button: module verification failed: signature and/or required
> key missing - tainting kernel
>
> [ 204.858131] RPC: Unregistered named UNIX socket transport module.
> [ 204.858134] RPC: Unregistered udp transport module.
> [ 204.858136] RPC: Unregistered tcp transport module.
> [ 204.858137] RPC: Unregistered tcp NFSv4.1 backchannel transport module.
> [ 204.859248]
> =
> [ 204.859251] BUG rpc_inode_cache (Tainted: GE): Objects
> remaining in rpc_inode_cache on __kmem_cache_shutdown()
>
> [ 204.859251]
> -
>
> [ 204.859252] Disabling lock debugging due to kernel taint
> [ 204.859255] INFO: Slab 0x006c197c objects=18 used=13
> fp=0xa584567e flags=0x17fffc08100
> [ 204.859259] CPU: 0 PID: 3633 Comm: rmmod Tainted: GB E
> 4.19.0-2-rt-amd64 #1 Debian 4.19.16-1
> [ 204.859260] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A29
> 06/28/2018
> [ 204.859261] Call Trace:
> [ 204.859269] dump_stack+0x5c/0x80
> [ 204.859273] slab_err+0xb0/0xd4
> [ 204.859277] ? cpumask_next+0x16/0x20
> [ 204.859279] ? flush_all+0x66/0x100
> [ 204.859282] __kmem_cache_shutdown.cold.103+0x1c/0x26
> [ 204.859287] shutdown_cache+0x15/0x1c0
> [ 204.859290] kmem_cache_destroy+0x216/0x240
> [ 204.859316] unregister_rpc_pipefs+0x16/0x30 [sunrpc]
> [ 204.859334] cleanup_sunrpc+0x1e/0x39 [sunrpc]
> [ 204.859337] __x64_sys_delete_module+0x190/0x2c0
> [ 204.859341] do_syscall_64+0x53/0x100
> [ 204.859346] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 204.859349] RIP: 0033:0x7f43fb8a00f7
> [ 204.859351] Code: 73 01 c3 48 8b 0d 99 0d 0c 00 f7 d8 64 89 01 48 83 c8 ff
> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d
> 01 f0 ff ff 73 01 c3 48 8b 0d 69 0d 0c 00 f7 d8 64 89 01 48
> [ 204.859354] RSP: 002b:7ffc4236d208 EFLAGS: 0206 ORIG_RAX:
> 00b0
> [ 204.859356] RAX: ffda RBX: 55a14f7eb220 RCX:
> 7f43fb8a00f7
> [ 204.859357] RDX: 000a RSI: 0800 RDI:
> 55a14f7eb288
> [ 204.859358] RBP: R08: 7ffc4236c181 R09:
>
> [ 204.859359] R10: 7f43fb911ae0 R11: 0206 R12:
> 7ffc4236d430
> [ 204.859360] R13: 7ffc4236ec4b R14: 55a14f7ea010 R15:
> 55a14f7eb220
> [ 204.859363] kmem_cache_destroy rpc_inode_cache: Slab cache still has
> objects
> [ 204.859621] CPU: 0 PID: 3633 Comm: rmmod Tainted: GB E
> 4.19.0-2-rt-amd64 #1 Debian 4.19.16-1
> [ 204.859622] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A29
> 06/28/2018
> [ 204.859623] Call Trace:
> [ 204.859626] dump_stack+0x5c/0x80
> [ 204.859629] kmem_cache_destroy+0x233/0x240
> [ 204.859647] unregister_rpc_pipefs+0x16/0x30 [sunrpc]
> [ 204.859664] cleanup_sunrpc+0x1e/0x39 [sunrpc]
> [ 204.859666] __x64_sys_delete_module+0x190/0x2c0
> [ 204.859670] do_syscall_64+0x53/0x100
> [ 204.859673] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 204.859675] RIP: 0033:0x7f43fb8a00f7
> [ 204.859677] Code: 73 01 c3 48 8b 0d 99 0d 0c 00 f7 d8 64 89 01 48 83 c8 ff
> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d
> 01 f0 ff ff 73 01 c3 48 8b 0d 69 0d 0c 00 f7 d8 64 89 01 48
> [ 204.859678] RSP: 002b:7ffc4236d208 EFLAGS: 0206 ORIG_RAX:
> 00b0
> [ 204.859679] RAX: ffda RBX: 55a14f7eb220 RCX:
> 7f43fb8a00f7
> [ 204.859680] RDX: 000a RSI: 0800 RDI:
> 55a14f7eb288
> [ 204.859681] RBP: R08: 7ffc4236c181 R09:
>
> [ 204.859682] R10: 7f43fb911ae0 R11: 0206 R12:
> 7ffc4236d430
> [ 204.859683] R13: 7ffc4236ec4b R14: 55a14f7ea010 R15:
> 55a14f7eb220
This was not while trying to force unload and sunrpc was really not
anymore in use?
Recently there was a fix for f1442d6349a2 ("sunrpc: fix refcount leak for rpc
auth modules")
https://lore.kernel.org/linux-nfs/3f1b347f-b809-478f-a1e9-0be98e22b...@oracle.com/T/#t
That fix from 5.12-rc4 went into 4.19.183 (not yet available for
buster, but working on) and 5.10.26.
Can you reproduce the issue using 5.10.40-1 from unstable?
Regards,
Salvatore
Bug#920177: linux-image-4.19.0-2-rt-amd64-unsigned: BUG while removing the sunrpc module
Subject: linux-image-4.19.0-2-rt-amd64-unsigned: BUG Package: src:linux Version: 4.19.16-1 Severity: normal Dear Maintainer, I was trying to remove the sunrpc module from the kernel and got the following BUG and backtrace. Note that the kernel is tainted because of this previous error that is unrelated: [1.514708] button: module verification failed: signature and/or required key missing - tainting kernel [ 204.858131] RPC: Unregistered named UNIX socket transport module. [ 204.858134] RPC: Unregistered udp transport module. [ 204.858136] RPC: Unregistered tcp transport module. [ 204.858137] RPC: Unregistered tcp NFSv4.1 backchannel transport module. [ 204.859248] = [ 204.859251] BUG rpc_inode_cache (Tainted: GE): Objects remaining in rpc_inode_cache on __kmem_cache_shutdown() [ 204.859251] - [ 204.859252] Disabling lock debugging due to kernel taint [ 204.859255] INFO: Slab 0x006c197c objects=18 used=13 fp=0xa584567e flags=0x17fffc08100 [ 204.859259] CPU: 0 PID: 3633 Comm: rmmod Tainted: GB E 4.19.0-2-rt-amd64 #1 Debian 4.19.16-1 [ 204.859260] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A29 06/28/2018 [ 204.859261] Call Trace: [ 204.859269] dump_stack+0x5c/0x80 [ 204.859273] slab_err+0xb0/0xd4 [ 204.859277] ? cpumask_next+0x16/0x20 [ 204.859279] ? flush_all+0x66/0x100 [ 204.859282] __kmem_cache_shutdown.cold.103+0x1c/0x26 [ 204.859287] shutdown_cache+0x15/0x1c0 [ 204.859290] kmem_cache_destroy+0x216/0x240 [ 204.859316] unregister_rpc_pipefs+0x16/0x30 [sunrpc] [ 204.859334] cleanup_sunrpc+0x1e/0x39 [sunrpc] [ 204.859337] __x64_sys_delete_module+0x190/0x2c0 [ 204.859341] do_syscall_64+0x53/0x100 [ 204.859346] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 204.859349] RIP: 0033:0x7f43fb8a00f7 [ 204.859351] Code: 73 01 c3 48 8b 0d 99 0d 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 69 0d 0c 00 f7 d8 64 89 01 48 [ 204.859354] RSP: 002b:7ffc4236d208 EFLAGS: 0206 ORIG_RAX: 00b0 [ 204.859356] RAX: ffda RBX: 55a14f7eb220 RCX: 7f43fb8a00f7 [ 204.859357] RDX: 000a RSI: 0800 RDI: 55a14f7eb288 [ 204.859358] RBP: R08: 7ffc4236c181 R09: [ 204.859359] R10: 7f43fb911ae0 R11: 0206 R12: 7ffc4236d430 [ 204.859360] R13: 7ffc4236ec4b R14: 55a14f7ea010 R15: 55a14f7eb220 [ 204.859363] kmem_cache_destroy rpc_inode_cache: Slab cache still has objects [ 204.859621] CPU: 0 PID: 3633 Comm: rmmod Tainted: GB E 4.19.0-2-rt-amd64 #1 Debian 4.19.16-1 [ 204.859622] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A29 06/28/2018 [ 204.859623] Call Trace: [ 204.859626] dump_stack+0x5c/0x80 [ 204.859629] kmem_cache_destroy+0x233/0x240 [ 204.859647] unregister_rpc_pipefs+0x16/0x30 [sunrpc] [ 204.859664] cleanup_sunrpc+0x1e/0x39 [sunrpc] [ 204.859666] __x64_sys_delete_module+0x190/0x2c0 [ 204.859670] do_syscall_64+0x53/0x100 [ 204.859673] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 204.859675] RIP: 0033:0x7f43fb8a00f7 [ 204.859677] Code: 73 01 c3 48 8b 0d 99 0d 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 69 0d 0c 00 f7 d8 64 89 01 48 [ 204.859678] RSP: 002b:7ffc4236d208 EFLAGS: 0206 ORIG_RAX: 00b0 [ 204.859679] RAX: ffda RBX: 55a14f7eb220 RCX: 7f43fb8a00f7 [ 204.859680] RDX: 000a RSI: 0800 RDI: 55a14f7eb288 [ 204.859681] RBP: R08: 7ffc4236c181 R09: [ 204.859682] R10: 7f43fb911ae0 R11: 0206 R12: 7ffc4236d430 [ 204.859683] R13: 7ffc4236ec4b R14: 55a14f7ea010 R15: 55a14f7eb220 -- Package-specific info: ** Version: Linux version 4.19.0-2-rt-amd64 (debian-ker...@lists.debian.org) (gcc version 8.2.0 (Debian 8.2.0-14)) #1 SMP PREEMPT RT Debian 4.19.16-1 (2019-01-17) ** Command line: BOOT_IMAGE=/boot/vmlinuz-4.19.0-2-rt-amd64 root=UUID=c27a1c2e-4689-49ec-ab55-bba0dae046dc ro vsyscall=none security=apparmor intel_iommu=on quiet ** Tainted: BE (8224) * System has hit bad_page. * Unsigned module has been loaded. ** Model information sys_vendor: Dell Inc. product_name: OptiPlex 7010 product_version: 01 chassis_vendor: Dell Inc. chassis_version: bios_vendor: Dell Inc. bios_version: A29 board_vendor: Dell Inc. board_name: 0KRC95 board_version: A02 ** Loaded modules: cpufreq_conservative(E) cpufreq_userspace(E) cpufreq_powersave(E) intel_rapl(E) intel_powerclamp(E) coretemp(E)
