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Message-ID: <672d2c6e.050a0220.0db4.01ac.GAE@google.com> Date: Thu, 07 Nov 2024 13:09:02 -0800 From: syzbot <syzbot+271fed3ed6f24600c364@...kaller.appspotmail.com> To: crashfixer001@...il.com, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [net?] [s390?] general protection fault in __smc_diag_dump (3) Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in __smc_diag_dump Oops: general protection fault, probably for non-canonical address 0xdffffc0000002c03: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000000016018-0x000000000001601f] CPU: 1 UID: 0 PID: 6134 Comm: syz.0.50 Not tainted 6.12.0-rc6-syzkaller-g80fb25341631 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline] RIP: 0010:__smc_diag_dump.constprop.0+0x3e2/0x2500 net/smc/smc_diag.c:89 Code: 4c 8b b3 58 05 00 00 4d 85 f6 0f 84 f6 02 00 00 e8 83 62 d1 f6 49 8d 7e 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 86 1c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffffc90002f8f160 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88802861e780 RCX: ffffffff88ff0104 RDX: 0000000000002c03 RSI: ffffffff8abb41ed RDI: 0000000000016018 RBP: ffff88807446e5e0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88807ca98000 R14: 0000000000016000 R15: 0000000000000002 FS: 00007f91ea7fe6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f91ea7ddd58 CR3: 000000007a980000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217 smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234 netlink_dump+0x552/0xcc0 net/netlink/af_netlink.c:2326 __netlink_dump_start+0x6d9/0x980 net/netlink/af_netlink.c:2441 netlink_dump_start include/linux/netlink.h:339 [inline] smc_diag_handler_dump+0x1fb/0x240 net/smc/smc_diag.c:251 __sock_diag_cmd net/core/sock_diag.c:249 [inline] sock_diag_rcv_msg+0x437/0x790 net/core/sock_diag.c:287 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2607 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661 __sys_sendmsg+0x117/0x1f0 net/socket.c:2690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f91eb57dff9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f91ea7fe038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f91eb735f80 RCX: 00007f91eb57dff9 RDX: 000000000400c000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f91eb5f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f91eb735f80 R15: 00007fff7cd545b8 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline] RIP: 0010:__smc_diag_dump.constprop.0+0x3e2/0x2500 net/smc/smc_diag.c:89 Code: 4c 8b b3 58 05 00 00 4d 85 f6 0f 84 f6 02 00 00 e8 83 62 d1 f6 49 8d 7e 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 86 1c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffffc90002f8f160 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88802861e780 RCX: ffffffff88ff0104 RDX: 0000000000002c03 RSI: ffffffff8abb41ed RDI: 0000000000016018 RBP: ffff88807446e5e0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88807ca98000 R14: 0000000000016000 R15: 0000000000000002 FS: 00007f91ea7fe6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f91ea7ddd58 CR3: 000000007a980000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 8b b3 58 05 00 00 mov 0x558(%rbx),%r14 7: 4d 85 f6 test %r14,%r14 a: 0f 84 f6 02 00 00 je 0x306 10: e8 83 62 d1 f6 call 0xf6d16298 15: 49 8d 7e 18 lea 0x18(%r14),%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 86 1c 00 00 jne 0x1cba 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 4d rex.WRB 3f: 8b .byte 0x8b Tested on: commit: 80fb2534 Merge tag 'pwm/for-6.12-rc7-fixes' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1438fd5f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3f17c54526422c3 dashboard link: https://syzkaller.appspot.com/bug?extid=271fed3ed6f24600c364 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.
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