Searched hist:"1 f8266ff" (Results 1 – 2 of 2) sorted by relevance
/openbmc/linux/security/apparmor/include/ |
H A D | cred.h | 1f8266ff Thu Sep 13 11:12:09 CDT 2018 Jann Horn <jannh@google.com> apparmor: don't try to replace stale label in ptrace access check
As a comment above begin_current_label_crit_section() explains, begin_current_label_crit_section() must run in sleepable context because when label_is_stale() is true, aa_replace_current_label() runs, which uses prepare_creds(), which can sleep. Until now, the ptrace access check (which runs with a task lock held) violated this rule.
Also add a might_sleep() assertion to begin_current_label_crit_section(), because asserts are less likely to be ignored than comments.
Fixes: b2d09ae449ced ("apparmor: move ptrace checks to using labels") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: John Johansen <john.johansen@canonical.com> 1f8266ff Thu Sep 13 11:12:09 CDT 2018 Jann Horn <jannh@google.com> apparmor: don't try to replace stale label in ptrace access check As a comment above begin_current_label_crit_section() explains, begin_current_label_crit_section() must run in sleepable context because when label_is_stale() is true, aa_replace_current_label() runs, which uses prepare_creds(), which can sleep. Until now, the ptrace access check (which runs with a task lock held) violated this rule. Also add a might_sleep() assertion to begin_current_label_crit_section(), because asserts are less likely to be ignored than comments. Fixes: b2d09ae449ced ("apparmor: move ptrace checks to using labels") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: John Johansen <john.johansen@canonical.com>
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/openbmc/linux/security/apparmor/ |
H A D | lsm.c | 1f8266ff Thu Sep 13 11:12:09 CDT 2018 Jann Horn <jannh@google.com> apparmor: don't try to replace stale label in ptrace access check
As a comment above begin_current_label_crit_section() explains, begin_current_label_crit_section() must run in sleepable context because when label_is_stale() is true, aa_replace_current_label() runs, which uses prepare_creds(), which can sleep. Until now, the ptrace access check (which runs with a task lock held) violated this rule.
Also add a might_sleep() assertion to begin_current_label_crit_section(), because asserts are less likely to be ignored than comments.
Fixes: b2d09ae449ced ("apparmor: move ptrace checks to using labels") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: John Johansen <john.johansen@canonical.com>
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