1. 漏洞描述

In the Linux kernel, the following vulnerability has been resolved:

scsi: ufs: core: Fix shift issue in ufshcd_clear_cmd()

When task_tag &gt;= 32 (in MCQ mode) and sizeof(unsigned int) == 4, 1U <<
task_tag will out of bounds for a u32 mask. Fix this up to prevent
SHIFT_ISSUE (bitwise shifts that are out of bounds for their data type).

[name:debug_monitors&amp;]Unexpected kernel BRK exception at EL1
[name:traps&amp;]Internal error: BRK handler: 00000000f2005514 [#1] PREEMPT SMP
[name:mediatek_cpufreq_hw&amp;]cpufreq stop DVFS log done
[name:mrdump&amp;]Kernel Offset: 0x1ba5800000 from 0xffffffc008000000
[name:mrdump&amp;]PHYS_OFFSET: 0x80000000
[name:mrdump&amp;]pstate: 22400005 (nzCv daif +PAN -UAO)
[name:mrdump&amp;]pc : [0xffffffdbaf52bb2c] ufshcd_clear_cmd+0x280/0x288
[name:mrdump&amp;]lr : [0xffffffdbaf52a774] ufshcd_wait_for_dev_cmd+0x3e4/0x82c
[name:mrdump&amp;]sp : ffffffc0081471b0
<snip&gt;
Workqueue: ufs_eh_wq_0 ufshcd_err_handler
Call trace:
dump_backtrace+0xf8/0x144
show_stack+0x18/0x24
dump_stack_lvl+0x78/0x9c
dump_stack+0x18/0x44
mrdump_common_die+0x254/0x480 [mrdump]
ipanic_die+0x20/0x30 [mrdump]
notify_die+0x15c/0x204
die+0x10c/0x5f8
arm64_notify_die+0x74/0x13c
do_debug_exception+0x164/0x26c
el1_dbg+0x64/0x80
el1h_64_sync_handler+0x3c/0x90
el1h_64_sync+0x68/0x6c
ufshcd_clear_cmd+0x280/0x288
ufshcd_wait_for_dev_cmd+0x3e4/0x82c
ufshcd_exec_dev_cmd+0x5bc/0x9ac
ufshcd_verify_dev_init+0x84/0x1c8
ufshcd_probe_hba+0x724/0x1ce0
ufshcd_host_reset_and_restore+0x260/0x574
ufshcd_reset_and_restore+0x138/0xbd0
ufshcd_err_handler+0x1218/0x2f28
process_one_work+0x5fc/0x1140
worker_thread+0x7d8/0xe20
kthread+0x25c/0x468
ret_from_fork+0x10/0x20

2. 影响范围

3. 影响组件

4. 修复版本

5. 修复方法

6. 下载链接