Rafael Mendonca 996d3efeb0 io-wq: Fix memory leak in worker creation ... If the CPU mask allocation for a node fails, then the memory allocated for the 'io_wqe' struct of the current node doesn't get freed on the error handling path, since it has not yet been added to the 'wqes' array. This was spotted when fuzzing v6.1-rc1 with Syzkaller: BUG: memory leak unreferenced object 0xffff8880093d5000 (size 1024): comm "syz-executor.2", pid 7701, jiffies 4295048595 (age 13.900s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000cb463369>] __kmem_cache_alloc_node+0x18e/0x720 [<00000000147a3f9c>] kmalloc_node_trace+0x2a/0x130 [<000000004e107011>] io_wq_create+0x7b9/0xdc0 [<00000000c38b2018>] io_uring_alloc_task_context+0x31e/0x59d [<00000000867399da>] __io_uring_add_tctx_node.cold+0x19/0x1ba [<000000007e0e7a79>] io_uring_setup.cold+0x1b80/0x1dce [<00000000b545e9f6>] __x64_sys_io_uring_setup+0x5d/0x80 [<000000008a8a7508>] do_syscall_64+0x5d/0x90 [<000000004ac08bec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd Fixes: 0e03496d19 ("io-wq: use private CPU mask") Cc: stable@vger.kernel.org Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com> Link: https://lore.kernel.org/r/20221020014710.902201-1-rafaelmendsr@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>		2022-10-20 05:48:59 -07:00
..
advise.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
advise.h
alloc_cache.h
cancel.c	io_uring: add IORING_SETUP_DEFER_TASKRUN	2022-09-21 10:30:42 -06:00
cancel.h
epoll.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
epoll.h
fdinfo.c	io_uring: fix fdinfo sqe offsets calculation	2022-10-12 16:30:56 -06:00
fdinfo.h
filetable.c
filetable.h	io_uring: kill hot path fixed file bitmap debug checks	2022-10-16 17:07:53 -06:00
fs.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
fs.h
io_uring.c	io_uring: don't iopoll from io_ring_ctx_wait_and_kill()	2022-10-16 17:08:42 -06:00
io_uring.h	io_uring: optimise locking for local tw with submit_wait	2022-10-12 16:30:56 -06:00
io-wq.c	io-wq: Fix memory leak in worker creation	2022-10-20 05:48:59 -07:00
io-wq.h
kbuf.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
kbuf.h	io_uring: allow buffer recycling in READV	2022-09-21 10:30:43 -06:00
Makefile
msg_ring.c	io_uring/msg_ring: Fix NULL pointer dereference in io_msg_send_fd()	2022-10-19 12:33:33 -07:00
msg_ring.h
net.c	io_uring/net: handle -EINPROGRESS correct for IORING_OP_CONNECT	2022-10-12 16:30:56 -06:00
net.h	io_uring/net: zerocopy sendmsg	2022-09-21 13:15:02 -06:00
nop.c
nop.h
notif.c	io_uring/notif: Remove the unused function io_notif_complete()	2022-09-05 11:42:39 -06:00
notif.h	io_uring/net: simplify zerocopy send user API	2022-09-01 09:13:33 -06:00
opdef.c	io_uring/opdef: remove 'audit_skip' from SENDMSG_ZC	2022-10-12 16:30:56 -06:00
opdef.h	io_uring: add custom opcode hooks on fail	2022-09-21 13:15:02 -06:00
openclose.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
openclose.h
poll.c	io_uring/poll: disable level triggered poll	2022-09-28 19:27:11 -06:00
poll.h
refs.h
rsrc.c	io_uring: remove FFS_SCM	2022-10-16 17:07:12 -06:00
rsrc.h	io_uring: remove FFS_SCM	2022-10-16 17:07:12 -06:00
rw.c	io_uring/rw: remove leftover debug statement	2022-10-16 17:24:10 -06:00
rw.h	io_uring/rw: don't lose partial IO result on fail	2022-09-21 13:15:02 -06:00
slist.h
splice.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
splice.h
sqpoll.c
sqpoll.h
statx.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
statx.h
sync.c	io_uring: make io_kiocb_to_cmd() typesafe	2022-08-12 17:01:00 -06:00
sync.h
tctx.c	io_uring: remove io_register_submitter	2022-10-07 12:25:30 -06:00
tctx.h	io_uring: simplify __io_uring_add_tctx_node	2022-10-07 12:25:30 -06:00
timeout.c	io_uring: remove unused return from io_disarm_next	2022-09-21 13:15:01 -06:00
timeout.h	io_uring: remove unused return from io_disarm_next	2022-09-21 13:15:01 -06:00
uring_cmd.c	io_uring: introduce fixed buffer support for io_uring_cmd	2022-09-30 07:50:59 -06:00
uring_cmd.h
xattr.c	__io_setxattr(): constify path	2022-09-01 17:39:05 -04:00
xattr.h