Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: bad usercopy in io_openat2_prep usercopy: Kernel memory overwrite attempt detected to SLUB object 'pid' (offset 24, size 24)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4995 Comm: syz-executor.0 Not tainted 6.2.0-rc6-syzkaller-00050-gfbe870a72fd1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : usercopy_abort+0x90/0x94 lr : usercopy_abort+0x90/0x94 sp : ffff800012dd3be0 x29: ffff800012dd3bf0 x28: 000000000000001c x27: ffff0000d0e13400 x26: 00000000200000c0 x25: ffff80000cf51000 x24: fffffc0000000000 x23: 05ffc00000000200 x22: fffffc0003108280 x21: ffff0000c420a118 x20: 0000000000000000 x19: 0000000000000018 x18: 0000000000000000 x17: 0000000000000000 x16: ffff0000d0e13df8 x15: ffff80000dbd1118 x14: ffff0000d0e13400 x13: 00000000ffffffff x12: ffff0000d0e13400 x11: ff808000081bd5b0 x10: 0000000000000000 x9 : 4c3aa38d2e853f00 x8 : 4c3aa38d2e853f00 x7 : ffff800008162dbc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefbff08 x1 : 0000000100000000 x0 : 000000000000005d Call trace: usercopy_abort+0x90/0x94 __check_heap_object+0xa8/0x100 __check_object_size+0x208/0x6b8 io_openat2_prep+0xcc/0x2f0 io_submit_sqes+0x330/0xba8 __arm64_sys_io_uring_enter+0x168/0x9b0 invoke_syscall+0x64/0x178 el0_svc_common+0xbc/0x180 do_el0_svc+0x48/0x150 el0_svc+0x58/0x14c el0t_64_sync_handler+0x84/0xf0 el0t_64_sync+0x190/0x194 Code: 911d2800 aa0903e1 f90003e8 94e6d3da (d4210000) ---[ end trace 0000000000000000 ]--- Tested on: commit: fbe870a7 io_uring,audit: don't log IORING_OP_MADVISE git tree: https://git.kernel.dk/linux.git for-6.3/io_uring console output: https://syzkaller.appspot.com/x/log.txt?x=17241257480000 kernel config: https://syzkaller.appspot.com/x/.config?x=22fc000172595f28 dashboard link: https://syzkaller.appspot.com/bug?extid=cdd9922704fc75e03ffc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 Note: no patches were applied.
