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a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=yJojWOMRYYMA:10 a=GoEa3M9JfhUA:10 a=yPCof4ZbAAAA:8 a=9jVcBwQ3IVUZEcKrhkYA:9 cc=ntf awl=host:12084 X-Proofpoint-GUID: Fh_m90enFP2q3noB9XJSVmr_ORbIBSW9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTA4MDE2MiBTYWx0ZWRfX4w0rO+y+vBug dFUZhDrd2OKdtnYbOr6spZJcxgggOClYB2q6wiLUBTYNCRK0VylAmHLa4O1x3bmfkjRdKIqor8i yKb5EQRxAjKBCUKjUAG1nUTDqA/wKTnpSU9KZCCYk2j1ceC2Ka/hX1jBqm8EoAzvlVrbsribAsD ymKwKn3w9Wh1iLg/xJPxFz2hzABPi7p1IV4ciqyyAyiR14SM/3MhVSOIkoBeQR9SJA8Ma3Smo1V PpHXygrdg4JMQpWXP/19S7et7d8TX7a5He4CUTfXzahHktFjTX4euad52nElyz2onsm7+6BnSle 3f0U1qUSnMwvl3sH33Hq1E0WAj3tKL2cn7VY8hEHK/UwJthKS/YgxkwyiViWfhTWuyRDRpVo+jp NDLnTPLuvTHU1dCUczwsFWBIJyxydw== Content-Type: text/plain; charset="utf-8" By adding this hook we enable procfs implementations to be able to use the .mmap_prepare hook rather than the deprecated .mmap one. We treat this as if it were any other nested mmap hook and utilise the .mmap_prepare compatibility layer if necessary. Signed-off-by: Lorenzo Stoakes --- fs/proc/inode.c | 12 +++++++++--- include/linux/proc_fs.h | 1 + 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 129490151be1..609abbc84bf4 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -414,9 +414,15 @@ static long proc_reg_compat_ioctl(struct file *file, u= nsigned int cmd, unsigned =20 static int pde_mmap(struct proc_dir_entry *pde, struct file *file, struct = vm_area_struct *vma) { - __auto_type mmap =3D pde->proc_ops->proc_mmap; - if (mmap) - return mmap(file, vma); + const struct file_operations f_op =3D { + .mmap =3D pde->proc_ops->proc_mmap, + .mmap_prepare =3D pde->proc_ops->proc_mmap_prepare, + }; + + if (f_op.mmap) + return f_op.mmap(file, vma); + else if (f_op.mmap_prepare) + return __compat_vma_mmap_prepare(&f_op, file, vma); return -EIO; } =20 diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h index f139377f4b31..e5f65ebd62b8 100644 --- a/include/linux/proc_fs.h +++ b/include/linux/proc_fs.h @@ -47,6 +47,7 @@ struct proc_ops { long (*proc_compat_ioctl)(struct file *, unsigned int, unsigned long); #endif int (*proc_mmap)(struct file *, struct vm_area_struct *); + int (*proc_mmap_prepare)(struct vm_area_desc *); unsigned long (*proc_get_unmapped_area)(struct file *, unsigned long, uns= igned long, unsigned long, unsigned long); } __randomize_layout; =20 --=20 2.51.0