On 4/30/21 2:25 AM, qiang.zhang@xxxxxxxxxxxxx wrote: > From: Zqiang <qiang.zhang@xxxxxxxxxxxxx> > > unreferenced object 0xffff8881123bf0a0 (size 32): > comm "syz-executor557", pid 8384, jiffies 4294946143 (age 12.360s) > backtrace: > [<ffffffff81469b71>] kmalloc_node include/linux/slab.h:579 [inline] > [<ffffffff81469b71>] kvmalloc_node+0x61/0xf0 mm/util.c:587 > [<ffffffff815f0b3f>] kvmalloc include/linux/mm.h:795 [inline] > [<ffffffff815f0b3f>] kvmalloc_array include/linux/mm.h:813 [inline] > [<ffffffff815f0b3f>] kvcalloc include/linux/mm.h:818 [inline] > [<ffffffff815f0b3f>] io_rsrc_data_alloc+0x4f/0xc0 fs/io_uring.c:7164 > [<ffffffff815f26d8>] io_sqe_buffers_register+0x98/0x3d0 fs/io_uring.c:8383 > [<ffffffff815f84a7>] __io_uring_register+0xf67/0x18c0 fs/io_uring.c:9986 > [<ffffffff81609222>] __do_sys_io_uring_register fs/io_uring.c:10091 [inline] > [<ffffffff81609222>] __se_sys_io_uring_register fs/io_uring.c:10071 [inline] > [<ffffffff81609222>] __x64_sys_io_uring_register+0x112/0x230 fs/io_uring.c:10071 > [<ffffffff842f616a>] do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 > [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae > > Fix data->tags memory leak, through io_rsrc_data_free() to release > data memory space. Applied, thanks. -- Jens Axboe
