f5c2976e0c
If a device management command completion happens after
wait_for_completion_timeout() times out and before ufshcd_clear_cmds() is
called, then the completion code may crash on the complete() call in
__ufshcd_transfer_req_compl().
Fix the following crash:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
Call trace:
complete+0x64/0x178
__ufshcd_transfer_req_compl+0x30c/0x9c0
ufshcd_poll+0xf0/0x208
ufshcd_sl_intr+0xb8/0xf0
ufshcd_intr+0x168/0x2f4
__handle_irq_event_percpu+0xa0/0x30c
handle_irq_event+0x84/0x178
handle_fasteoi_irq+0x150/0x2e8
__handle_domain_irq+0x114/0x1e4
gic_handle_irq.31846+0x58/0x300
el1_irq+0xe4/0x1c0
efi_header_end+0x110/0x680
__irq_exit_rcu+0x108/0x124
__handle_domain_irq+0x118/0x1e4
gic_handle_irq.31846+0x58/0x300
el1_irq+0xe4/0x1c0
cpuidle_enter_state+0x3ac/0x8c4
do_idle+0x2fc/0x55c
cpu_startup_entry+0x84/0x90
kernel_init+0x0/0x310
start_kernel+0x0/0x608
start_kernel+0x4ec/0x608
Link: https://lore.kernel.org/r/20220720170228.1598842-1-bvanassche@acm.org
Fixes:
|
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| ufs-debugfs.c | ||
| ufs-debugfs.h | ||
| ufs-fault-injection.c | ||
| ufs-fault-injection.h | ||
| ufs-hwmon.c | ||
| ufs-sysfs.c | ||
| ufs-sysfs.h | ||
| ufs_bsg.c | ||
| ufs_bsg.h | ||
| ufshcd-crypto.c | ||
| ufshcd-crypto.h | ||
| ufshcd-priv.h | ||
| ufshcd.c | ||
| ufshpb.c | ||
| ufshpb.h | ||