general protection fault, probably for non-canonical address 0xe0e9fc4800000928: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x0750024000004940-0x0750024000004947] CPU: 1 PID: 18596 Comm: syz-executor.0 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:snd_rawmidi_poll+0x8f/0x680 sound/core/rawmidi.c:1656 Code: 4c 8b 6b 08 4d 85 ed 0f 84 b8 03 00 00 e8 69 88 e7 f9 49 8d bd a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 05 05 00 00 49 8b 85 a0 00 00 00 49 8d 7d 18 48 RSP: 0018:ffffc90003fbf9e0 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: ffff88802a360640 RCX: ffffc90005552000 RDX: 00ea004800000928 RSI: ffffffff879a3477 RDI: 0750024000004944 RBP: ffff88802bb2f900 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90003fbfa88 R13: 07500240000048a4 R14: ffff88802a360648 R15: ffff88802ae30938 FS: 00007fb2a5508700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb2a33fe718 CR3: 0000000079854000 CR4: 00000000003506e0 Call Trace: vfs_poll include/linux/poll.h:88 [inline] io_poll_check_events io_uring/poll.c:279 [inline] io_poll_task_func+0x3a6/0x1220 io_uring/poll.c:327 handle_tw_list+0xa8/0x460 io_uring/io_uring.c:1169 tctx_task_work+0x12e/0x530 io_uring/io_uring.c:1224 task_work_run+0x16f/0x270 kernel/task_work.c:179 get_signal+0x1c7/0x24f0 kernel/signal.c:2635 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb2a488c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb2a5508168 EFLAGS: 00000246 ORIG_RAX: 0000000000000048 RAX: fffffffffffffe00 RBX: 00007fb2a49abf80 RCX: 00007fb2a488c0c9 RDX: 0000000020000180 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007fb2a48e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8d95157f R14: 00007fb2a5508300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:snd_rawmidi_poll+0x8f/0x680 sound/core/rawmidi.c:1656 Code: 4c 8b 6b 08 4d 85 ed 0f 84 b8 03 00 00 e8 69 88 e7 f9 49 8d bd a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 05 05 00 00 49 8b 85 a0 00 00 00 49 8d 7d 18 48 RSP: 0018:ffffc90003fbf9e0 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: ffff88802a360640 RCX: ffffc90005552000 RDX: 00ea004800000928 RSI: ffffffff879a3477 RDI: 0750024000004944 RBP: ffff88802bb2f900 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90003fbfa88 R13: 07500240000048a4 R14: ffff88802a360648 R15: ffff88802ae30938 FS: 00007fb2a5508700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f97b7990c78 CR3: 0000000079854000 CR4: 00000000003506e0 ---------------- Code disassembly (best guess): 0: 4c 8b 6b 08 mov 0x8(%rbx),%r13 4: 4d 85 ed test %r13,%r13 7: 0f 84 b8 03 00 00 je 0x3c5 d: e8 69 88 e7 f9 callq 0xf9e7887b 12: 49 8d bd a0 00 00 00 lea 0xa0(%r13),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 05 05 00 00 jne 0x539 34: 49 8b 85 a0 00 00 00 mov 0xa0(%r13),%rax 3b: 49 8d 7d 18 lea 0x18(%r13),%rdi 3f: 48 rex.W