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AnonymeMeow
82c6dd2047
Fanotify used to refuse to report pidfds for reaped tasks by applying a pid_has_task() check before calling pidfd_prepare(). This prevented userspace from obtaining information about the task. Register the event pid with pidfs when creating the fanotify event if pidfd reporting was requested, so pidfd_prepare() can later create a pidfd for the reaped task. Suggested-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/linux-fsdevel/20260528-schmuckvoll-heilen-garen-be77b4208671@brauner/ Signed-off-by: AnonymeMeow <anonymemeow@gmail.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> Link: https://patch.msgid.link/20260607003343.425939-3-anonymemeow@gmail.com Signed-off-by: Jan Kara <jack@suse.cz>
37 lines
979 B
C
37 lines
979 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_PID_FS_H
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#define _LINUX_PID_FS_H
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#include <linux/gfp_types.h>
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struct coredump_params;
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struct file *pidfs_alloc_file(struct pid *pid, unsigned int flags);
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void __init pidfs_init(void);
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void pidfs_prepare_pid(struct pid *pid);
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int pidfs_add_pid(struct pid *pid);
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void pidfs_remove_pid(struct pid *pid);
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void pidfs_exit(struct task_struct *tsk);
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#ifdef CONFIG_COREDUMP
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void pidfs_coredump(const struct coredump_params *cprm);
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#endif
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extern const struct dentry_operations pidfs_dentry_operations;
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int pidfs_register_pid_gfp(struct pid *pid, gfp_t gfp);
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/**
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* pidfs_register_pid - register a struct pid in pidfs
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* @pid: pid to pin
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*
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* Register a struct pid in pidfs.
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*
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* Return: On success zero, on error a negative error code is returned.
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*/
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static inline int pidfs_register_pid(struct pid *pid)
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{
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return pidfs_register_pid_gfp(pid, GFP_KERNEL);
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}
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void pidfs_free_pid(struct pid *pid);
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#endif /* _LINUX_PID_FS_H */
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