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vfs: show filesystem name at dump_inode()

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Commit 8b17e54096 ("vfs: add initial support for CONFIG_DEBUG_VFS") added
dump_inode(), but dump_inode() currently reports only raw pointer address.
Comment says that adding a proper inode dumping routine is a TODO.

However, syzkaller concurrently tests multiple filesystems, and several
filesystems started calling dump_inode() due to hitting VFS_BUG_ON_INODE()
added by commit af153bb63a ("vfs: catch invalid modes in may_open()")
before a proper inode dumping routine is implemented.

Show filesystem name at dump_inode() so that we can find which filesystem
has passed an invalid mode to may_open() from syzkaller's crash reports.

Link: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/ceaf4021-65cc-422e-9d0e-6afa18dd8276@I-love.SAKURA.ne.jp
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Tetsuo Handa
2025-08-11 15:50:28 +09:00
committed by Christian Brauner
parent 708c04a5c2
commit ecb0605364
1 changed files with 1 additions and 1 deletions
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2
fs/inode.c
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@@ -2913,7 +2913,7 @@ EXPORT_SYMBOL(mode_strip_sgid);
*/
void dump_inode(struct inode *inode, const char *reason)
{
pr_warn("%s encountered for inode %px", reason, inode);
pr_warn("%s encountered for inode %px (%s)\n", reason, inode, inode->i_sb->s_type->name);
}
EXPORT_SYMBOL(dump_inode);