https://bugs.freedesktop.org/show_bug.cgi?id=110225
Bug ID: 110225 Summary: Kernel panic while “ modprobe amdkfd ; modprobe -r amdkfd " ; 4.14.35 kernel . Product: DRI Version: XOrg git Hardware: Other OS: All Status: NEW Severity: major Priority: medium Component: DRM/amdkfd Assignee: dri-devel@lists.freedesktop.org Reporter: John.p.donnelly@oracle.com
Hello ,
I am investigating a issue that our test group reported concerning this driver. Their test loads and unloads every kernel module included in the Oracle 4.14.35 kernel release . You don’t even need a AMD platform . It occurs on any Intel, or a KVM VM instance too.
Kernel panic while “ modprobe amdkfd ; modprobe -r amdkfd “
[ 329.425334] ? __slab_free+0x9b/0x2ba [ 329.427836] ? process_slab+0x3c1/0x45c [ 329.430336] dev_printk_emit+0x4e/0x65 [ 329.432829] __dev_printk+0x46/0x8b [ 329.435183] _dev_info+0x6c/0x85 [ 329.437435] ? kfree+0x141/0x182 [ 329.439646] kfd_module_exit+0x37/0x39 [amdkfd] [ 329.442258] SyS_delete_module+0x1c3/0x26f [ 329.444722] ? entry_SYSCALL_64_after_hwframe+0xaa/0x0 [ 329.447479] ? entry_SYSCALL_64_after_hwframe+0xa3/0x0 [ 329.450206] ? entry_SYSCALL_64_after_hwframe+0x9c/0x0 [ 329.452912] ? entry_SYSCALL_64_after_hwframe+0x95/0x0 [ 329.455586] do_syscall_64+0x79/0x1ae [ 329.457766] entry_SYSCALL_64_after_hwframe+0x151/0x0 [ 329.460369] RIP: 0033:0x7f1757a1b457 [ 329.462502] RSP: 002b:00007ffd62ce1f48 EFLAGS: 00000206 ORIG_RAX:
Looks like some memory corruption.
Sometimes the unload works but the message logged is garbage:
[root@jpd-vmbase02 ~]# modprobe -r amdkfd [ 144.449981] ???????????? hn??蟟??xn??ן??kfd: Removed module
Is this something one of team members could have possibly corrected in an upstream version ?
#define KFD_DRIVER_DESC "Standalone HSA driver for AMD's GPUs" #define KFD_DRIVER_DATE "20150421" #define KFD_DRIVER_MAJOR 0 #define KFD_DRIVER_MINOR 7 #define KFD_DRIVER_PATCHLEVEL 2
Thank you,
John