Hello, syzbot found the following issue on: HEAD commit: d192f5382581 Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11ddd9baa80000 kernel config: https://syzkaller.appspot.com/x/.config?x=77b9a3cf8f44c6da dashboard link: https://syzkaller.appspot.com/bug?extid=1f564413055af2023f17 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=154f89d6a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=135c4f9aa80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/80468c74d86a/disk-d192f538.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/36cbfe6495ed/vmlinux-d192f538.xz kernel image: https://storage.googleapis.com/syzbot-assets/6c7dc916e910/bzImage-d192f538.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/16e268b0a8de/mount_1.gz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16737b76a80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=15737b76a80000 console output: https://syzkaller.appspot.com/x/log.txt?x=11737b76a80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1f564413055af2023f17@xxxxxxxxxxxxxxxxxxxxxxxxx stack segment: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5023 Comm: syz-executor354 Not tainted 6.5.0-rc2-syzkaller-00307-gd192f5382581 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:find_stack lib/stackdepot.c:350 [inline] RIP: 0010:__stack_depot_save+0x15e/0x510 lib/stackdepot.c:390 Code: 29 c0 89 c3 48 8b 05 49 07 f0 0d 89 d9 23 0d 39 07 f0 0d 48 8d 0c c8 48 8b 29 48 85 ed 75 0b eb 70 48 8b 6d 00 48 85 ed 74 67 <39> 5d 08 75 f2 44 3b 7d 0c 75 ec 31 c0 48 8b 74 c5 18 49 39 34 c6 RSP: 0018:ffffc90003d2f4b0 EFLAGS: 00010206 RAX: ffff88823b400000 RBX: 0000000051095974 RCX: ffff88823b8acba0 RDX: 000000000000000e RSI: 0000000000000001 RDI: 000000002f730f6d RBP: 4c8b480000441f0f R08: 00000000a4fca10e R09: fffffbfff1d56faa R10: ffffffff8eab7d57 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000cc0 R14: ffffc90003d2f518 R15: 000000000000000e FS: 000055555739b480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8d752ba000 CR3: 00000000760e2000 CR4: 0000000000350ef0 Call Trace: <TASK> kasan_save_stack+0x43/0x50 mm/kasan/common.c:46 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3470 [inline] kmem_cache_alloc_node+0x185/0x3f0 mm/slub.c:3515 __alloc_skb+0x287/0x330 net/core/skbuff.c:634 alloc_skb include/linux/skbuff.h:1289 [inline] nlmsg_new include/net/netlink.h:1003 [inline] netlink_ack+0x305/0x1370 net/netlink/af_netlink.c:2486 netlink_rcv_skb+0x345/0x440 net/netlink/af_netlink.c:2555 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 __sys_sendto+0x255/0x340 net/socket.c:2134 __do_sys_sendto net/socket.c:2146 [inline] __se_sys_sendto net/socket.c:2142 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2142 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f8d7d324613 Code: 64 89 02 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d b1 5a 08 00 00 41 89 ca 74 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 55 48 83 ec 30 44 89 4c 24 RSP: 002b:00007ffd7dc7abf8 EFLAGS: 00000202 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f8d7d3ac840 RCX: 00007f8d7d324613 RDX: 0000000000000028 RSI: 00007f8d7d3ac890 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007ffd7dc7ac14 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f8d7d3ac890 R15: 0000000000000000 </TASK> Modules linked in: ---------------- Code disassembly (best guess): 0: 29 c0 sub %eax,%eax 2: 89 c3 mov %eax,%ebx 4: 48 8b 05 49 07 f0 0d mov 0xdf00749(%rip),%rax # 0xdf00754 b: 89 d9 mov %ebx,%ecx d: 23 0d 39 07 f0 0d and 0xdf00739(%rip),%ecx # 0xdf0074c 13: 48 8d 0c c8 lea (%rax,%rcx,8),%rcx 17: 48 8b 29 mov (%rcx),%rbp 1a: 48 85 ed test %rbp,%rbp 1d: 75 0b jne 0x2a 1f: eb 70 jmp 0x91 21: 48 8b 6d 00 mov 0x0(%rbp),%rbp 25: 48 85 ed test %rbp,%rbp 28: 74 67 je 0x91 * 2a: 39 5d 08 cmp %ebx,0x8(%rbp) <-- trapping instruction 2d: 75 f2 jne 0x21 2f: 44 3b 7d 0c cmp 0xc(%rbp),%r15d 33: 75 ec jne 0x21 35: 31 c0 xor %eax,%eax 37: 48 8b 74 c5 18 mov 0x18(%rbp,%rax,8),%rsi 3c: 49 39 34 c6 cmp %rsi,(%r14,%rax,8) --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
