Re: [PATCH] init_module.2: Add ETXTBSY error for finit_module

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Hi Yang,

On 11/17/21 09:16, Yang Xu wrote:
Since kernel commit[1], finit_module fails with ETXTBSY error if fd has write permission.
Since kernel commit[2], finit_module fails with EBADF error if fd doesn't have read permission.

So we can use read-write permission to trigger ETXTBSY error all the time since linux 4.7.

[1]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=39d637af
[2]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=032146cd

Signed-off-by: Yang Xu <xuyang2018.jy@xxxxxxxxxxx>
---
  man2/init_module.2 | 7 +++++++
  1 file changed, 7 insertions(+)

diff --git a/man2/init_module.2 b/man2/init_module.2
index aac0c6631..2bcbaf4c3 100644
--- a/man2/init_module.2
+++ b/man2/init_module.2
@@ -242,6 +242,13 @@ is invalid.
  .B ENOEXEC
  .I fd
  does not refer to an open file.
+.TP
+.BR ETXTBSY " (since Linux 4.7)"
+.\" commit 39d637af5aa7577f655c58b9e55587566c63a0af
+The file referred to by
+.I fd
+is opened for read-write.
+.

Please, remove that trailing '.'

Thanks,
Alex

  .PP
  In addition to the above errors, if the module's
  .I init


--
Alejandro Colomar
Linux man-pages comaintainer; http://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/



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