While running kselftest gpio on x86_64 and i386 the following warnings were noticed and the device did not recover.
GOOD: next-20210329 BAD: next-20210330
steps to reproduce: ------------------- # Boot linux next tag 20210330 on x86_64 machine # cd /opt/kselftests/default-in-kernel/ # ./gpio-mockup.sh --> which is doing modprobe gpio-mockup
Test log: ------------ # selftests: gpio: gpio-mockup.sh # 1. Module load tests # 1.1. dynamic allocation of gpio # ./gpio-mockup.sh: line 106: ./gpio-mockup-cdev: No such file or directory # test failed: line value is 127 when 1 was[ 46.136044] ------------[ cut here ]------------ [ 46.141916] remove_proc_entry: removing non-empty directory 'irq/3', leaking at least 'ttyS1' expected # GPI[ 46.150471] WARNING: CPU: 2 PID: 603 at /usr/src/kernel/fs/proc/generic.c:717 remove_proc_entry+0x1a8/0x1c0 [ 46.161566] Modules linked in: gpio_mockup(-) x86_pkg_temp_thermal fuse [ 46.168195] CPU: 2 PID: 603 Comm: modprobe Not tainted 5.12.0-rc5-next-20210330 #1 [ 46.175793] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 46.183217] RIP: 0010:remove_proc_entry+0x1a8/0x1c0 O gpio-mockup te[ 46.188128] Code: 40 bc 24 a8 48 c7 c7 98 4a 6a a8 48 0f 45 c2 49 8b 94 24 b0 00 00 00 4c 8b 80 d8 00 00 00 48 8b 92 d8 00 00 00 e8 38 36 cb ff <0f> 0b e9 5b ff ff ff e8 0c f4 c5 00 66 90 66 2e 0f 1f 84 00 00 00 [ 46.208252] RSP: 0018:ffff9da080293c58 EFLAGS: 00010286 [ 46.213511] RAX: 0000000000000000 RBX: ffff93e8403bcbb8 RCX: 0000000000000000 [ 46.220650] RDX: 0000000000000001 RSI: ffff93e9afb177f0 RDI: ffff93e9afb177f0 [ 46.227820] RBP: ffff9da080293c88 R08: 0000000000000001 R09: 0000000000000001 [ 46.235018] R10: ffff9da080293a80 R11: ffff9da080293a08 R12: ffff93e8403bcb00 [ 46.242165] R13: ffff93e840263100 R14: 0000000000000001 R15: 0000000000000000 st FAIL [ 46.249303] FS: 00007f7dc2501740(0000) GS:ffff93e9afb00000(0000) knlGS:0000000000000000 [ 46.258164] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.263977] CR2: 00007f7dc1de67f0 CR3: 000000014f292003 CR4: 00000000003706e0 [ 46.271124] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.278292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.285459] Call Trace: [ 46.287926] unregister_irq_proc+0xf8/0x110 [ 46.292128] free_desc+0x2e/0x70 [ 46.295393] irq_free_descs+0x54/0x80 [ 46.299102] irq_domain_free_irqs+0x11b/0x150 [ 46.303507] irq_dispose_mapping+0x77/0x120 [ 46.307711] gpio_mockup_dispose_mappings+0x4c/0x60 [gpio_mockup] [ 46.313817] devm_action_release+0x15/0x20 [ 46.317933] release_nodes+0x11e/0x220 [ 46.321707] devres_release_all+0x3c/0x50 [ 46.325733] device_release_driver_internal+0x10e/0x1d0 [ 46.331016] driver_detach+0x4d/0xa0 [ 46.334609] bus_remove_driver+0x5f/0xe0 [ 46.338553] driver_unregister+0x2f/0x50 [ 46.342495] platform_driver_unregister+0x12/0x20 [ 46.347218] gpio_mockup_exit+0x1f/0x5cc [gpio_mockup] [ 46.352374] __x64_sys_delete_module+0x15b/0x260 [ 46.357082] do_syscall_64+0x37/0x50 [ 46.360676] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 46.365748] RIP: 0033:0x7f7dc1e0f997 [ 46.369342] Code: 73 01 c3 48 8b 0d 01 a5 2b 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 d1 a4 2b 00 f7 d8 64 89 01 48 [ 46.388108] RSP: 002b:00007ffe35506e78 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 46.395708] RAX: ffffffffffffffda RBX: 000000000134ebd0 RCX: 00007f7dc1e0f997 [ 46.402883] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000000000134ec38 [ 46.410031] RBP: 0000000000000000 R08: 00007ffe35505e41 R09: 0000000000000000 [ 46.417183] R10: 00000000000008da R11: 0000000000000206 R12: 000000000134ec38 [ 46.424331] R13: 0000000000000001 R14: 000000000134ec38 R15: 00007ffe35508238 [ 46.431507] irq event stamp: 6645 [ 46.434845] hardirqs last enabled at (6655): [<ffffffffa6e4fc4e>] console_unlock+0x34e/0x550 [ 46.443380] hardirqs last disabled at (6664): [<ffffffffa6e4fcb9>] console_unlock+0x3b9/0x550 [ 46.451915] softirqs last enabled at (6564): [<ffffffffa800030e>] __do_softirq+0x30e/0x421 [ 46.460333] softirqs last disabled at (6559): [<ffffffffa6dce643>] irq_exit_rcu+0xb3/0xc0 [ 46.468548] ---[ end trace 89d0119dab1b1498 ]--- [ 46.477938] remove_proc_entry: removing non-empty directory 'irq/4', leaking at least 'ttyS0' [ 46.486512] WARNING: CPU: 0 PID: 603 at /usr/src/kernel/fs/proc/generic.c:717 remove_proc_entry+0x1a8/0x1c0
Reported-by: Naresh Kamboju naresh.kamboju@linaro.org
metadata: git branch: master git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git describe: next-20210330 kernel-config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft...
Full test log: https://lkft.validation.linaro.org/scheduler/job/2463479#L1481
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20210330/tes...