Hagar Hemdan e673bace47 io_uring: fix possible deadlock in io_register_iowq_max_workers() ... BugLink: https://bugs.launchpad.net/bugs/2089541 commit 73254a297c2dd094abec7c9efee32455ae875bdf upstream. The io_register_iowq_max_workers() function calls io_put_sq_data(), which acquires the sqd->lock without releasing the uring_lock. Similar to the commit 009ad9f0c6 ("io_uring: drop ctx->uring_lock before acquiring sqd->lock"), this can lead to a potential deadlock situation. To resolve this issue, the uring_lock is released before calling io_put_sq_data(), and then it is re-acquired after the function call. This change ensures that the locks are acquired in the correct order, preventing the possibility of a deadlock. Suggested-by: Maximilian Heyne <mheyne@amazon.de> Signed-off-by: Hagar Hemdan <hagarhem@amazon.com> Link: https://lore.kernel.org/r/20240604130527.3597-1-hagarhem@amazon.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CVE-2024-41080 Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com> Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>		2025-01-13 03:48:02 +03:00
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Makefile	…
io-wq.c	io_uring/io-wq: limit retrying worker initialisation	2024-09-27 11:57:21 +02:00
io-wq.h	io_uring: break out of iowq iopoll on teardown	2024-01-05 14:38:20 +01:00
io_uring.c	io_uring: fix possible deadlock in io_register_iowq_max_workers()	2025-01-13 03:48:02 +03:00