general protection fault in io_get_cqe

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[syzbot] [io-uring?] general protection fault in io_get_cqe_overflow	2 (4)	2023/10/03 02:19
[PATCH] io_uring: ensure io_lockdep_assert_cq_locked() handles disabled rings	1 (1)	2023/10/03 01:57

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[syzbot] [io-uring?] general protection fault in io_get_cqe_overflow

2 (4)

2023/10/03 02:19

[PATCH] io_uring: ensure io_lockdep_assert_cq_locked() handles disabled rings

1 (1)

2023/10/03 01:57


Created	Duration	User	Patch	Repo	Result
2023/10/03 02:02	16m	axboe@kernel.dk		git://git.kernel.dk/linux.git io_uring-6.6	OK log

general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 1 PID: 5030 Comm: syz-executor742 Not tainted 6.6.0-rc3-syzkaller-00146-g9f3ebbef746f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:io_get_cqe_overflow+0x1f2/0x570 io_uring/io_uring.h:116 Code: fc ff df 80 3c 08 00 74 08 48 89 ef e8 67 54 b2 fd 4c 8b 75 00 49 8d 6e 2c 48 89 e8 48 c1 e8 03 48 bb 00 00 00 00 00 fc ff df <0f> b6 04 18 84 c0 0f 85 18 03 00 00 44 8b 65 00 41 83 e4 04 31 ff RSP: 0018:ffffc9000398f930 EFLAGS: 00010207 RAX: 0000000000000005 RBX: dffffc0000000000 RCX: dffffc0000000000 RDX: ffff888017a4d940 RSI: 0000000000000020 RDI: 0000000000000000 RBP: 000000000000002c R08: ffffffff84362701 R09: fffff52000731f20 R10: dffffc0000000000 R11: fffff52000731f20 R12: 1ffff1100410b400 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000398f9c0 FS: 0000555555943380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001380 CR3: 000000007d529000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> io_get_cqe io_uring/io_uring.h:132 [inline] io_fill_cqe_aux io_uring/io_uring.c:884 [inline] __io_post_aux_cqe+0xe7/0x440 io_uring/io_uring.c:931 io_rsrc_put_work io_uring/rsrc.c:156 [inline] io_rsrc_node_ref_zero+0x219/0x570 io_uring/rsrc.c:191 io_put_rsrc_node io_uring/rsrc.h:112 [inline] io_queue_rsrc_removal+0x4a0/0x5c0 io_uring/rsrc.c:667 __io_sqe_buffers_update io_uring/rsrc.c:469 [inline] __io_register_rsrc_update+0x828/0x1430 io_uring/rsrc.c:499 io_register_rsrc_update+0x1cd/0x220 io_uring/rsrc.c:530 __do_sys_io_uring_register io_uring/io_uring.c:4587 [inline] __se_sys_io_uring_register+0x78f/0x1470 io_uring/io_uring.c:4547 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fddb16c14e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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:00007ffe58601a08 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 0000000000006ba5 RCX: 00007fddb16c14e9 RDX: 0000000020001600 RSI: 0000000000000010 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000ac5f8 R09: 00000000000ac5f8 R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe58601bd8 R14: 0000000000000001 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:io_get_cqe_overflow+0x1f2/0x570 io_uring/io_uring.h:116 Code: fc ff df 80 3c 08 00 74 08 48 89 ef e8 67 54 b2 fd 4c 8b 75 00 49 8d 6e 2c 48 89 e8 48 c1 e8 03 48 bb 00 00 00 00 00 fc ff df <0f> b6 04 18 84 c0 0f 85 18 03 00 00 44 8b 65 00 41 83 e4 04 31 ff RSP: 0018:ffffc9000398f930 EFLAGS: 00010207 RAX: 0000000000000005 RBX: dffffc0000000000 RCX: dffffc0000000000 RDX: ffff888017a4d940 RSI: 0000000000000020 RDI: 0000000000000000 RBP: 000000000000002c R08: ffffffff84362701 R09: fffff52000731f20 R10: dffffc0000000000 R11: fffff52000731f20 R12: 1ffff1100410b400 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000398f9c0 FS: 0000555555943380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001380 CR3: 000000007d529000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 80 3c 08 00 74 filds 0x7400083c(%rax) 6: 08 48 89 or %cl,-0x77(%rax) 9: ef out %eax,(%dx) a: e8 67 54 b2 fd call 0xfdb25476 f: 4c 8b 75 00 mov 0x0(%rbp),%r14 13: 49 8d 6e 2c lea 0x2c(%r14),%rbp 17: 48 89 e8 mov %rbp,%rax 1a: 48 c1 e8 03 shr $0x3,%rax 1e: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 25: fc ff df * 28: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax <-- trapping instruction 2c: 84 c0 test %al,%al 2e: 0f 85 18 03 00 00 jne 0x34c 34: 44 8b 65 00 mov 0x0(%rbp),%r12d 38: 41 83 e4 04 and $0x4,%r12d 3c: 31 ff xor %edi,%edi

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/09/30 09:56	upstream	9f3ebbef746f	8e26a358	.config	strace log	report	syz	C		[disk image] [vmlinux] [kernel image]	ci2-upstream-fs	general protection fault in io_get_cqe_overflow
2023/09/30 09:30	upstream	9f3ebbef746f	8e26a358	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-fs	general protection fault in io_get_cqe_overflow

Crashes (2):

Assets (help?)