Messages in this thread Patch in this message | | | From | Edward Adam Davis <> | Subject | Re: [syzbot] [xfs?] [ext4?] general protection fault in jbd2__journal_start | Date | Wed, 31 Jan 2024 15:40:41 +0800 |
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please test general protection fault in jbd2__journal_start
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index cb0b8d6fc0c6..702312cd5392 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -493,6 +493,9 @@ handle_t *jbd2__journal_start(journal_t *journal, int nblocks, int rsv_blocks, return ERR_PTR(-EROFS); if (handle) { + if (handle->saved_alloc_context & ~PF_MEMALLOC_NOFS) + return ERR_PTR(-EBUSY); + J_ASSERT(handle->h_transaction->t_journal == journal); handle->h_ref++; return handle;
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