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kernel: Fixed potential null pointer issue with current->mm in kernel version 5.10

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When calling get_full_comm() within system call hooks, current->mm may be null (prctl). A fallback mechanism for current->comm must be added beforehand to prevent null pointer dereferences when accessing mm->arg_start/arg_end.

Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
This commit is contained in:
ShirkNeko
2025-10-27 21:54:20 +08:00
parent 3701d47fbb
commit 343c6452cf
5 changed files with 107 additions and 103 deletions
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2
kernel/sucompat.c
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@@ -192,8 +192,10 @@ int ksu_handle_execveat_sucompat(int *fd, struct filename **filename_ptr,
#if __SULOG_GATE
ksu_sulog_report_syscall(current_uid().val, NULL, "execve", filename->name);
#ifndef CONFIG_KSU_SUSFS_SUS_SU
bool is_allowed = ksu_is_allow_uid(current_uid().val);
#endif
#endif
#ifndef CONFIG_KSU_SUSFS_SUS_SU