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Bottomley" , "Martin K. Petersen" , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , , , , Alice Chao , , , , Subject: [PATCH v1 1/1] ufs: core: fix shift issue in ufshcd_clear_cmd Date: Mon, 5 Feb 2024 18:49:04 +0800 Message-ID: <20240205104905.24929-1-alice.chao@mediatek.com> X-Mailer: git-send-email 2.18.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--4.721700-8.000000 X-TMASE-MatchedRID: KISk8WdGcXBCI2iUrGleqpdc7I2df+ms2D9FbDg9BP42/UwdvFG5IpBn 0Y6NyRFo+hJFNJdQq3OnwZyfnQYxDBLekAZjy1WtdXu122+iJtrXAvRa0tfJGvuoLVXE/uWaDbI Geo4FmxIppITnGCYXcdLS2IFgBJ3tVQ7O/4REy+v62mDKTRDEUkJfxXUWJFGS31GU/N5W5BB91D unZtIaFuLzNWBegCW2xl8lw85EaVQLbigRnpKlKTpcQTtiHDgWu7FQYXTUmCAUzE8GbcbxJmrYG 6Z2cg1Fe4VlQFoik74zs1tzCvb5Hw== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--4.721700-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: CDD062A06CE60E35FB211DAD39DB59CF632CD39BD23F74EAC619151C171A39CD2000:8 X-MTK: N X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790055732954406727 X-GMAIL-MSGID: 1790055732954406727 From: Alice Chao When task_tag > 32 (in mcq mode), 1U << task_tag will out of bound for u32 mask. Fix this bug to prevent SHIFT_ISSUE (Bitwise shifts that are out of bounds for their data type). [name:debug_monitors&]Unexpected kernel BRK exception at EL1 [name:traps&]Internal error: BRK handler: 00000000f2005514 [#1] PREEMPT SMP [name:mediatek_cpufreq_hw&]cpufreq stop DVFS log done [name:mrdump&]Kernel Offset: 0x1ba5800000 from 0xffffffc008000000 [name:mrdump&]PHYS_OFFSET: 0x80000000 [name:mrdump&]pstate: 22400005 (nzCv daif +PAN -UAO) [name:mrdump&]pc : [0xffffffdbaf52bb2c] ufshcd_clear_cmd+0x280/0x288 [name:mrdump&]lr : [0xffffffdbaf52a774] ufshcd_wait_for_dev_cmd+0x3e4/0x82c [name:mrdump&]sp : ffffffc0081471b0 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 Signed-off-by: Alice Chao Reviewed-by: Stanley Jhu Reviewed-by: Bart Van Assche --- drivers/ufs/core/ufshcd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 029d017fc1b6..c6cff4aa440a 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -3057,7 +3057,7 @@ bool ufshcd_cmd_inflight(struct scsi_cmnd *cmd) */ static int ufshcd_clear_cmd(struct ufs_hba *hba, u32 task_tag) { - u32 mask = 1U << task_tag; + u32 mask; unsigned long flags; int err; @@ -3075,6 +3075,8 @@ static int ufshcd_clear_cmd(struct ufs_hba *hba, u32 task_tag) return 0; } + mask = 1U << task_tag; + /* clear outstanding transaction before retry */ spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_utrl_clear(hba, mask);