Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-26 22:21:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

A single bugfix for the PASID management code, which freed the PASID too

Browse Source 
early. The PASID needs to be tied to the mm lifetime, not to the address
 space lifetime.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmJ3r7sTHHRnbHhAbGlu
 dXRyb25peC5kZQAKCRCmGPVMDXSYoQPsD/41fEE71j8VIElRbwQYnhmTa8Gm+F3X
 J5+88ksOA9ho8HwEZsI56lIqCFchDolrk4BgJD8PYelotClHMjexPQkZvLB84hIM
 KDvXsvPtaqGa/xYbnoSZM4M0litQBONVgSkW6a5qzOfxUrQbTsvqsDO0tUA5rCGm
 FCNd5ACTwLDo3gp0TLKDXtkrTC8r/JBTG7TyOkQtezFpUFQNAV2TeEgzopkJNhEu
 7Y1py5xkq08J4cRrK/k62DgPTdAdHQv97TB/SWYFLL3jjq4p8kJpUt1bi26BivIc
 xIRudSmWKSz07KoL0/omE/nxpIzRMQSRmIl9FKHEsOa0hRoG8GYyOmpU84x3vHUn
 XZg0OedN1555RNY5DnFoIBuTQTukJLGUO1rfc/9I4PaGtyomISuAtEDNR9vUWqTF
 k1/2kx6FdxHCn8AXgx3Xp8qxi92FoyGFFfiib8nXu+ns0YhVTO2qKKoKK+WRhKjK
 iOp1z/ZOZDiHOSCZNFOJ0wW7Hq6DD17WpJXPiPJ7XmCTZgaq9FecXwLhoXW6H251
 /TexTYJt+z/MlS86godsPEh+mBDga8qh7TaMT8loswES26Anghh9CZT9ws3psqKc
 ahQb6TJqbW3C5BKrUBMiDeE4iSF06ZQv/+l+iAFvmGDusx/t8QQ8i8oUFI2M7T11
 rlbINCN6/UaJsw==
 =CVeU
 -----END PGP SIGNATURE-----

Merge tag 'core-urgent-2022-05-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull PASID fix from Thomas Gleixner:
 "A single bugfix for the PASID management code, which freed the PASID
  too early. The PASID needs to be tied to the mm lifetime, not to the
  address space lifetime"

* tag 'core-urgent-2022-05-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  mm: Fix PASID use-after-free issue
This commit is contained in:
Linus Torvalds 2022-05-08 10:28:22 -07:00
commit 1f8c5dff00
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/fork.c
View File

@ -792,6 +792,7 @@ void __mmdrop(struct mm_struct *mm)
mmu_notifier_subscriptions_destroy(mm);
check_mm(mm);
put_user_ns(mm->user_ns);
mm_pasid_drop(mm);
free_mm(mm);
}
EXPORT_SYMBOL_GPL(__mmdrop);
@ -1190,7 +1191,6 @@ static inline void __mmput(struct mm_struct *mm)
}
if (mm->binfmt)
module_put(mm->binfmt->module);
mm_pasid_drop(mm);
mmdrop(mm);
}