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coredump: show supported coredump modes

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Allow userspace to discover what coredump modes are supported.

Link: https://lore.kernel.org/20250516-work-coredump-socket-v8-6-664f3caf2516@kernel.org
Acked-by: Luca Boccassi <luca.boccassi@gmail.com>
Reviewed-by: Jann Horn <jannh@google.com>
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-05-16 13:25:33 +02:00
parent 1d8db6fd69
commit c72d914637
1 changed files with 13 additions and 0 deletions
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13
fs/coredump.c
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@@ -1248,6 +1248,12 @@ static int proc_dostring_coredump(const struct ctl_table *table, int write,
static const unsigned int core_file_note_size_min = CORE_FILE_NOTE_SIZE_DEFAULT;
static const unsigned int core_file_note_size_max = CORE_FILE_NOTE_SIZE_MAX;
static char core_modes[] = {
"file\npipe"
#ifdef CONFIG_UNIX
"\nsocket"
#endif
};
static const struct ctl_table coredump_sysctls[] = {
{
@@ -1291,6 +1297,13 @@ static const struct ctl_table coredump_sysctls[] = {
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
},
{
.procname = "core_modes",
.data = core_modes,
.maxlen = sizeof(core_modes) - 1,
.mode = 0444,
.proc_handler = proc_dostring,
},
};
static int __init init_fs_coredump_sysctls(void)