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authorPavel Begunkov <asml.silence@gmail.com>2021-08-31 14:13:10 +0100
committerJens Axboe <axboe@kernel.dk>2021-08-31 11:45:31 -0600
commitc6d3d9cbd659de8f2176b4e4721149c88ac096d4 (patch)
tree315dae7ab27c5ae8cd93af75cce8ddbff2ecf21b /include/linux/nfsd/git:
parentio-wq: ensure that hash wait lock is IRQ disabling (diff)
io_uring: fix queueing half-created requests
[ 27.259845] general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN PTI [ 27.261043] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] [ 27.263730] RIP: 0010:sock_from_file+0x20/0x90 [ 27.272444] Call Trace: [ 27.272736] io_sendmsg+0x98/0x600 [ 27.279216] io_issue_sqe+0x498/0x68d0 [ 27.281142] __io_queue_sqe+0xab/0xb50 [ 27.285830] io_req_task_submit+0xbf/0x1b0 [ 27.286306] tctx_task_work+0x178/0xad0 [ 27.288211] task_work_run+0xe2/0x190 [ 27.288571] exit_to_user_mode_prepare+0x1a1/0x1b0 [ 27.289041] syscall_exit_to_user_mode+0x19/0x50 [ 27.289521] do_syscall_64+0x48/0x90 [ 27.289871] entry_SYSCALL_64_after_hwframe+0x44/0xae io_req_complete_failed() -> io_req_complete_post() -> io_req_task_queue() still would try to enqueue hard linked request, which can be half prepared (e.g. failed init), so we can't allow that to happen. Fixes: a8295b982c46d ("io_uring: fix failed linkchain code logic") Reported-by: syzbot+f9704d1878e290eddf73@syzkaller.appspotmail.com Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/70b513848c1000f88bd75965504649c6bb1415c0.1630415423.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/nfsd/git:')
0 files changed, 0 insertions, 0 deletions
Copyright © 1996 – 2026 Jason A. Donenfeld. All Rights Reverse Engineered.
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#ifndef _ASM_GENERIC_PGTABLE_UFFD_H
#define _ASM_GENERIC_PGTABLE_UFFD_H

#ifndef CONFIG_HAVE_ARCH_USERFAULTFD_WP
static __always_inline int pte_uffd_wp(pte_t pte)
{
	return 0;
}

static __always_inline int pmd_uffd_wp(pmd_t pmd)
{
	return 0;
}

static __always_inline pte_t pte_mkuffd_wp(pte_t pte)
{
	return pte;
}

static __always_inline pmd_t pmd_mkuffd_wp(pmd_t pmd)
{
	return pmd;
}

static __always_inline pte_t pte_clear_uffd_wp(pte_t pte)
{
	return pte;
}

static __always_inline pmd_t pmd_clear_uffd_wp(pmd_t pmd)
{
	return pmd;
}

static __always_inline pte_t pte_swp_mkuffd_wp(pte_t pte)
{
	return pte;
}

static __always_inline int pte_swp_uffd_wp(pte_t pte)
{
	return 0;
}

static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
{
	return pte;
}

static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
{
	return pmd;
}

static inline int pmd_swp_uffd_wp(pmd_t pmd)
{
	return 0;
}

static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
{
	return pmd;
}
#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */

#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */