https://github.com/torvalds/linux
Revision cac9e4418f4cbd548ccb065b3adcafe073f7f7d2 authored by Jens Axboe on 12 June 2023, 19:51:36 UTC, committed by Jens Axboe on 14 June 2023, 01:26:42 UTC
If the application sets ->msg_control and we have to later retry this command, or if it got queued with IOSQE_ASYNC to begin with, then we need to retain the original msg_control value. This is due to the net stack overwriting this field with an in-kernel pointer, to copy it in. Hitting that path for the second time will now fail the copy from user, as it's attempting to copy from a non-user address. Cc: stable@vger.kernel.org # 5.10+ Link: https://github.com/axboe/liburing/issues/880 Reported-and-tested-by: Marek Majkowski <marek@cloudflare.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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History 
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Tip revision: cac9e4418f4cbd548ccb065b3adcafe073f7f7d2 authored by Jens Axboe on 12 June 2023, 19:51:36 UTC
io_uring/net: save msghdr->msg_control for retries
io_uring/net: save msghdr->msg_control for retries
Tip revision: cac9e44
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 20.1 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 151 bytes |
| .gitattributes | -rw-r--r-- | 90 bytes |
| .gitignore | -rw-r--r-- | 2.1 KB |
| .mailmap | -rw-r--r-- | 28.0 KB |
| .rustfmt.toml | -rw-r--r-- | 369 bytes |
| COPYING | -rw-r--r-- | 496 bytes |
| CREDITS | -rw-r--r-- | 100.1 KB |
| Kbuild | -rw-r--r-- | 2.5 KB |
| Kconfig | -rw-r--r-- | 555 bytes |
| MAINTAINERS | -rw-r--r-- | 694.0 KB |
| Makefile | -rw-r--r-- | 70.1 KB |
| README | -rw-r--r-- | 727 bytes |
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