Hello, syzbot found the following issue on: HEAD commit: ce522ba9ef7e Linux 5.18-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14225724f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b8f1a3425e05af27 dashboard link: https://syzkaller.appspot.com/bug?extid=96b43810dfe9c3bb95ed compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c45d88f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17b428af700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+96b43810dfe9c3bb95ed@xxxxxxxxxxxxxxxxxxxxxxxxx executing program BUG: memory leak unreferenced object 0xffff88810d698300 (size 192): comm "syz-executor156", pid 3595, jiffies 4294944234 (age 12.580s) 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: [<ffffffff823357be>] kmalloc_array include/linux/slab.h:621 [inline] [<ffffffff823357be>] iovec_from_user lib/iov_iter.c:1922 [inline] [<ffffffff823357be>] iovec_from_user+0x13e/0x280 lib/iov_iter.c:1905 [<ffffffff82335945>] __import_iovec+0x45/0x250 lib/iov_iter.c:1948 [<ffffffff81668c8e>] __io_import_iovec+0xfe/0x800 fs/io_uring.c:3497 [<ffffffff8166d92f>] io_import_iovec fs/io_uring.c:3508 [inline] [<ffffffff8166d92f>] io_read+0x59f/0x880 fs/io_uring.c:3803 [<ffffffff816727b4>] io_issue_sqe+0x364/0x3270 fs/io_uring.c:7122 [<ffffffff816761c3>] __io_queue_sqe fs/io_uring.c:7489 [inline] [<ffffffff816761c3>] io_queue_sqe fs/io_uring.c:7531 [inline] [<ffffffff816761c3>] io_submit_sqe fs/io_uring.c:7736 [inline] [<ffffffff816761c3>] io_submit_sqes+0x553/0x3030 fs/io_uring.c:7842 [<ffffffff81679390>] __do_sys_io_uring_enter+0x6f0/0x1100 fs/io_uring.c:10780 [<ffffffff8451ca25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8451ca25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff88810d6983c0 (size 192): comm "syz-executor156", pid 3603, jiffies 4294944759 (age 7.330s) 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: [<ffffffff823357be>] kmalloc_array include/linux/slab.h:621 [inline] [<ffffffff823357be>] iovec_from_user lib/iov_iter.c:1922 [inline] [<ffffffff823357be>] iovec_from_user+0x13e/0x280 lib/iov_iter.c:1905 [<ffffffff82335945>] __import_iovec+0x45/0x250 lib/iov_iter.c:1948 [<ffffffff81668c8e>] __io_import_iovec+0xfe/0x800 fs/io_uring.c:3497 [<ffffffff8166d92f>] io_import_iovec fs/io_uring.c:3508 [inline] [<ffffffff8166d92f>] io_read+0x59f/0x880 fs/io_uring.c:3803 [<ffffffff816727b4>] io_issue_sqe+0x364/0x3270 fs/io_uring.c:7122 [<ffffffff816761c3>] __io_queue_sqe fs/io_uring.c:7489 [inline] [<ffffffff816761c3>] io_queue_sqe fs/io_uring.c:7531 [inline] [<ffffffff816761c3>] io_submit_sqe fs/io_uring.c:7736 [inline] [<ffffffff816761c3>] io_submit_sqes+0x553/0x3030 fs/io_uring.c:7842 [<ffffffff81679390>] __do_sys_io_uring_enter+0x6f0/0x1100 fs/io_uring.c:10780 [<ffffffff8451ca25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8451ca25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
