Bug#920177: linux-image-amd64-rt: BUG while removing the sunrpc module
Hi,
the bug is still there in this package version:
Source: linux-signed-amd64 (4.19.28+2)
Version: 4.19.28-2
[ 311.093489] RPC: Unregistered named UNIX socket transport module.
[ 311.093493] RPC: Unregistered udp transport module.
[ 311.093494] RPC: Unregistered tcp transport module.
[ 311.093494] RPC: Unregistered tcp NFSv4.1 backchannel transport module.
[ 311.093546] =============================================================================
[ 311.093548] BUG rpc_inode_cache (Not tainted): Objects remaining in rpc_inode_cache on __kmem_cache_shutdown()
[ 311.093548] -----------------------------------------------------------------------------
[ 311.093549] Disabling lock debugging due to kernel taint
[ 311.093551] INFO: Slab 0x00000000f538f3cb objects=18 used=13 fp=0x0000000036f8e292 flags=0x17fffc000008100
[ 311.093554] CPU: 0 PID: 2939 Comm: rmmod Tainted: G B 4.19.0-4-rt-amd64 #1 Debian 4.19.28-2
[ 311.093555] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A29 06/28/2018
[ 311.093555] Call Trace:
[ 311.093564] dump_stack+0x5c/0x80
[ 311.093568] slab_err+0xb0/0xd4
[ 311.093572] ? cpumask_next+0x16/0x20
[ 311.093574] ? flush_all+0x66/0x100
[ 311.093576] __kmem_cache_shutdown.cold.103+0x1c/0x26
[ 311.093581] shutdown_cache+0x15/0x1c0
[ 311.093583] kmem_cache_destroy+0x216/0x240
[ 311.093603] unregister_rpc_pipefs+0x16/0x30 [sunrpc]
[ 311.093617] cleanup_sunrpc+0x1e/0x39 [sunrpc]
[ 311.093620] __x64_sys_delete_module+0x190/0x2c0
[ 311.093623] do_syscall_64+0x53/0x100
[ 311.093626] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 311.093628] RIP: 0033:0x7f4dd72d8137
[ 311.093630] Code: 73 01 c3 48 8b 0d 59 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 29 0d 0c 00 f7 d8 64 89 01 48
[ 311.093631] RSP: 002b:00007ffce99a5c78 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 311.093633] RAX: ffffffffffffffda RBX: 0000557deefcf220 RCX: 00007f4dd72d8137
[ 311.093634] RDX: 000000000000000a RSI: 0000000000000800 RDI: 0000557deefcf288
[ 311.093634] RBP: 0000000000000000 R08: 00007ffce99a4bf1 R09: 0000000000000000
[ 311.093635] R10: 00007f4dd7349ae0 R11: 0000000000000206 R12: 00007ffce99a5ea0
[ 311.093636] R13: 00007ffce99a6c31 R14: 0000557deefce010 R15: 0000557deefcf220
[ 311.093638] kmem_cache_destroy rpc_inode_cache: Slab cache still has objects
[ 311.099909] CPU: 0 PID: 2939 Comm: rmmod Tainted: G B 4.19.0-4-rt-amd64 #1 Debian 4.19.28-2
[ 311.099910] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A29 06/28/2018
[ 311.099910] Call Trace:
[ 311.099915] dump_stack+0x5c/0x80
[ 311.099919] kmem_cache_destroy+0x233/0x240
[ 311.099937] unregister_rpc_pipefs+0x16/0x30 [sunrpc]
[ 311.099950] cleanup_sunrpc+0x1e/0x39 [sunrpc]
[ 311.099952] __x64_sys_delete_module+0x190/0x2c0
[ 311.099957] do_syscall_64+0x53/0x100
[ 311.099959] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 311.099961] RIP: 0033:0x7f4dd72d8137
[ 311.099963] Code: 73 01 c3 48 8b 0d 59 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 29 0d 0c 00 f7 d8 64 89 01 48
[ 311.099964] RSP: 002b:00007ffce99a5c78 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[ 311.099965] RAX: ffffffffffffffda RBX: 0000557deefcf220 RCX: 00007f4dd72d8137
[ 311.099966] RDX: 000000000000000a RSI: 0000000000000800 RDI: 0000557deefcf288
[ 311.099967] RBP: 0000000000000000 R08: 00007ffce99a4bf1 R09: 0000000000000000
[ 311.099967] R10: 00007f4dd7349ae0 R11: 0000000000000206 R12: 00007ffce99a5ea0
[ 311.099968] R13: 00007ffce99a6c31 R14: 0000557deefce010 R15: 0000557deefcf220
--
Laurent.
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