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4ee39e979c
Seiji reports hitting the following crash when erasing pstore dump variables, BUG: unable to handle kernel NULL pointer dereference at 0000000000000fa4 IP: [<ffffffff8142dadf>] __efivar_entry_iter+0x2f/0x120 PGD 18482a067 PUD 190724067 PMD 0 Oops: 0000 [#1] SMP [...] Call Trace: [<ffffffff8143001f>] efi_pstore_erase+0xdf/0x130 [<ffffffff81200038>] ? cap_socket_create+0x8/0x10 [<ffffffff811ea491>] pstore_unlink+0x41/0x60 [<ffffffff811741ff>] vfs_unlink+0x9f/0x110 [<ffffffff8117813b>] do_unlinkat+0x18b/0x280 [<ffffffff81178472>] sys_unlinkat+0x22/0x40 [<ffffffff81542402>] system_call_fastpath+0x16/0x1b 'entry' needs to be initialised in efi_pstore_erase() when iterating with __efivar_entry_iter(), otherwise the garbage pointer will be dereferenced, leading to crashes like the above. Reported-by: Seiji Aguchi <seiji.aguchi@hds.com> Tested-by: Seiji Aguchi <seiji.aguchi@hds.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Matthew Garrett <matthew.garrett@nebula.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> |
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| .. | ||
| efi | ||
| dcdbas.c | ||
| dcdbas.h | ||
| dell_rbu.c | ||
| dmi-id.c | ||
| dmi-sysfs.c | ||
| dmi_scan.c | ||
| edd.c | ||
| iscsi_ibft.c | ||
| iscsi_ibft_find.c | ||
| Kconfig | ||
| Makefile | ||
| memmap.c | ||
| pcdp.c | ||
| pcdp.h | ||