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take care to handle NULL ->proc_lseek()

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Easily done now, just by clearing FMODE_LSEEK in ->f_mode
during proc_reg_open() for such entries.

Fixes: 868941b144 "fs: remove no_llseek"
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2022-08-14 15:16:18 -04:00
parent 5d6a0f4da9
commit 3f61631d47
1 changed files with 3 additions and 0 deletions
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3
fs/proc/inode.c
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@ -494,6 +494,9 @@ static int proc_reg_open(struct inode *inode, struct file *file)
typeof_member(struct proc_ops, proc_release) release; typeof_member(struct proc_ops, proc_release) release;
struct pde_opener *pdeo; struct pde_opener *pdeo;
if (!pde->proc_ops->proc_lseek)
file->f_mode &= ~FMODE_LSEEK;
if (pde_is_permanent(pde)) { if (pde_is_permanent(pde)) {
open = pde->proc_ops->proc_open; open = pde->proc_ops->proc_open;
if (open) if (open)