lsm_set_self_attr

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long lsm_set_self_attr(unsigned int attr, struct lsm_ctx *ctx, u32 size, u32 flags);


Number (x86-64)	460
ABI	common
Kernel entry point	`sys_lsm_set_self_attr`

This is the raw kernel prototype from the pinned Linux 6.12.94 schema, not the libc wrapper.

Description

Sets a Linux security module attribute of the calling process.

Arguments

Name	Type	Meaning
`attr` (arg0)	`unsigned int`	Pointer to an attribute structure.
`ctx` (arg1)	`struct lsm_ctx *`	AIO or io_uring context handle.
`size` (arg2)	`u32`	Size in bytes.
`flags` (arg3)	`u32`	Option flags that change the behavior of the call.

Return value

On success: 0.

In an Antinomie trace the Return column and the ret filter field show the raw kernel return value. On failure that is the negative errno, for example -2 for ENOENT, not the -1 plus errno that the libc wrapper gives. syscall.errno holds the positive errno and syscall.success is false.

Common errors

Raw return	Name	Meaning
`-22`	`EINVAL`	An argument is invalid.
`-1`	`EPERM`	The operation is not permitted for this process.

Man page

lsm_set_self_attr(2) on man7.org

Captured by Antinomie

Coverage mark: Implemented. Every pointer argument has a capture rule in the pinned kernel patch and none of them records a “no decoder”, “address only” or “not observed” gap on any code path. Individual values can still be incomplete on a particular call; see the capture statuses.

Every call is recorded as an Entry record (the six argument words and the pointees copied at entry) and an Exit record (the return value and the pointees copied at exit).

Arguments

Argument	When	How	Recorded field key	Condition
`attr` (arg0)	Entry	raw scalar word	`args.0`, `args.attr`
`ctx` (arg1)	Entry	the pointer itself, as a raw word	`args.1`, `args.raw[1]`
↳ pointee	Entry	structure `lsm_ctx`, length `size` (arg2); “invalid extent” outside one page	`arg1.context`	always
`size` (arg2)	Entry	raw scalar word	`args.2`, `args.size`
`flags` (arg3)	Entry	raw scalar word; Syscall Trace also decodes it into flag names (`unknown` group), listing unknown bits separately	`args.3`, `args.flags`

Filter fields

Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
Argument words: args.attr (arg0), args.ctx (arg1), args.size (arg2), args.flags (arg3); args.0 to args.5 by position.
Structure lsm_ctx[] behind ctx (arg1): args.ctx.<member> for ctx_len, flags, id, len.

See Syscall Trace filter for the full syntax.

For what the capture statuses mean, see Capture statuses. For what is never recorded, see Known gaps.