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| author | Jakub Kicinski <kuba@kernel.org> | 2024-10-31 17:30:16 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-31 18:10:07 -0700 |
| commit | 5b1c965956744d9b22fae7e9bca1c8e72355e1d0 (patch) | |
| tree | 504f731de0a7ac9111de5c106cd360e4ff1c04af /include/linux/uaccess.h | |
| parent | 9e114ec8084020e10e1cb7b43dbbf6e69940866b (diff) | |
| parent | 5635f189425e328097714c38341944fc40731f3d (diff) | |
| download | lwn-5b1c965956744d9b22fae7e9bca1c8e72355e1d0.tar.gz lwn-5b1c965956744d9b22fae7e9bca1c8e72355e1d0.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR (net-6.12-rc6).
Conflicts:
drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
cbe84e9ad5e2 ("wifi: iwlwifi: mvm: really send iwl_txpower_constraints_cmd")
188a1bf89432 ("wifi: mac80211: re-order assigning channel in activate links")
https://lore.kernel.org/all/20241028123621.7bbb131b@canb.auug.org.au/
net/mac80211/cfg.c
c4382d5ca1af ("wifi: mac80211: update the right link for tx power")
8dd0498983ee ("wifi: mac80211: Fix setting txpower with emulate_chanctx")
drivers/net/ethernet/intel/ice/ice_ptp_hw.h
6e58c3310622 ("ice: fix crash on probe for DPLL enabled E810 LOM")
e4291b64e118 ("ice: Align E810T GPIO to other products")
ebb2693f8fbd ("ice: Read SDP section from NVM for pin definitions")
ac532f4f4251 ("ice: Cleanup unused declarations")
https://lore.kernel.org/all/20241030120524.1ee1af18@canb.auug.org.au/
No adjacent changes.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/uaccess.h')
| -rw-r--r-- | include/linux/uaccess.h | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index 39c7cf82b0c2..43844510d5d0 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -38,6 +38,7 @@ #else #define can_do_masked_user_access() 0 #define masked_user_access_begin(src) NULL + #define mask_user_address(src) (src) #endif /* @@ -159,19 +160,27 @@ _inline_copy_from_user(void *to, const void __user *from, unsigned long n) { unsigned long res = n; might_fault(); - if (!should_fail_usercopy() && likely(access_ok(from, n))) { + if (should_fail_usercopy()) + goto fail; + if (can_do_masked_user_access()) + from = mask_user_address(from); + else { + if (!access_ok(from, n)) + goto fail; /* * Ensure that bad access_ok() speculation will not * lead to nasty side effects *after* the copy is * finished: */ barrier_nospec(); - instrument_copy_from_user_before(to, from, n); - res = raw_copy_from_user(to, from, n); - instrument_copy_from_user_after(to, from, n, res); } - if (unlikely(res)) - memset(to + (n - res), 0, res); + instrument_copy_from_user_before(to, from, n); + res = raw_copy_from_user(to, from, n); + instrument_copy_from_user_after(to, from, n, res); + if (likely(!res)) + return 0; +fail: + memset(to + (n - res), 0, res); return res; } extern __must_check unsigned long |