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msm: adsprpc: Validate fastrpc session ctx

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Validate fastrpc session ctx before dereferencing since
it may be not be initialized when reading debug file.

Change-Id: I6eccf3c17ced9c0d3a2678bf39634f984302e3a8
Signed-off-by: Edgar Flores <edgarf@codeaurora.org>
This commit is contained in:
Edgar Flores
2021-08-09 16:55:32 -07:00
committed by Anirudh Raghavendra
parent 74c86adb11
commit 33ba63bfbc
1 changed files with 16 additions and 15 deletions
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31
drivers/char/adsprpc.c
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@@ -5517,21 +5517,22 @@ static ssize_t fastrpc_debugfs_read(struct file *filp, char __user *buffer,
"%s %6s %d\n", "file_close", ":", fl->file_close);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %9s %d\n", "profile", ":", fl->profile);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %3s %d\n", "smmu.coherent", ":",
fl->sctx->smmu.coherent);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %4s %d\n", "smmu.enabled", ":",
fl->sctx->smmu.enabled);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %9s %d\n", "smmu.cb", ":", fl->sctx->smmu.cb);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %5s %d\n", "smmu.secure", ":",
fl->sctx->smmu.secure);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %5s %d\n", "smmu.faults", ":",
fl->sctx->smmu.faults);
if (fl->sctx) {
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %3s %d\n", "smmu.coherent", ":",
fl->sctx->smmu.coherent);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %4s %d\n", "smmu.enabled", ":",
fl->sctx->smmu.enabled);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %9s %d\n", "smmu.cb", ":", fl->sctx->smmu.cb);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %5s %d\n", "smmu.secure", ":",
fl->sctx->smmu.secure);
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"%s %5s %d\n", "smmu.faults", ":",
fl->sctx->smmu.faults);
}
len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len,
"\n=======%s %s %s======\n", title,
" LIST OF MAPS ", title);