===================================================== BUG: KMSAN: use-after-free in __list_add_valid+0x292/0x430 lib/list_debug.c:26 CPU: 0 PID: 2369 Comm: syz-executor.0 Not tainted 5.4.0-rc5+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 __list_add_valid+0x292/0x430 lib/list_debug.c:26 __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] cma_listen_on_all drivers/infiniband/core/cma.c:2509 [inline] rdma_listen+0x623/0x10b0 drivers/infiniband/core/cma.c:3563 ucma_listen+0x36e/0x5e0 drivers/infiniband/core/ucma.c:1092 ucma_write+0x5c5/0x640 drivers/infiniband/core/ucma.c:1684 __vfs_write+0x1a9/0xcb0 fs/read_write.c:494 vfs_write+0x481/0x920 fs/read_write.c:558 ksys_write+0x265/0x430 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write+0x92/0xb0 fs/read_write.c:620 __x64_sys_write+0x4a/0x70 fs/read_write.c:620 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x45a219 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1c85a36c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219 RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1c85a376d4 R13: 00000000004ca93f R14: 00000000004e2ce8 R15: 00000000ffffffff Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:134 kmsan_slab_free+0x8d/0xf0 mm/kmsan/kmsan_hooks.c:108 slab_free_freelist_hook mm/slub.c:1473 [inline] slab_free mm/slub.c:3046 [inline] kfree+0x4c1/0x2e70 mm/slub.c:3999 free_pipe_info+0x40d/0x440 fs/pipe.c:709 put_pipe_info fs/pipe.c:582 [inline] pipe_release+0x41b/0x540 fs/pipe.c:603 __fput+0x4c9/0xba0 fs/file_table.c:280 ____fput+0x37/0x40 fs/file_table.c:313 task_work_run+0x22e/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x39d/0x4d0 arch/x86/entry/common.c:194 syscall_return_slowpath+0x90/0x610 arch/x86/entry/common.c:274 do_syscall_64+0xdc/0x160 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x63/0xe7 =====================================================