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Message-ID: <6750bef0.050a0220.17bd51.007a.GAE@google.com> Date: Wed, 04 Dec 2024 12:43:28 -0800 From: syzbot <syzbot+e874685d80aae83785cc@...kaller.appspotmail.com> To: johannes@...solutions.net, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [wireless?] [ext4?] general protection fault in pcpu_alloc Hello, syzbot found the following issue on: HEAD commit: bcc8eda6d349 Merge tag 'turbostat-2024.11.30' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=128dbf78580000 kernel config: https://syzkaller.appspot.com/x/.config?x=53ebff8e07a0ee6f dashboard link: https://syzkaller.appspot.com/bug?extid=e874685d80aae83785cc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14bd15e8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7dd7042cbaae/disk-bcc8eda6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/48269d20d4af/vmlinux-bcc8eda6.xz kernel image: https://storage.googleapis.com/syzbot-assets/010f2b2a997f/bzImage-bcc8eda6.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/73a779ed9f88/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e874685d80aae83785cc@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xec2c282c2c2c2c2d: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: maybe wild-memory-access in range [0x6161616161616168-0x616161616161616f] CPU: 0 UID: 0 PID: 5926 Comm: syz-executor Not tainted 6.12.0-syzkaller-12113-gbcc8eda6d349 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__hlist_del include/linux/list.h:982 [inline] RIP: 0010:hlist_del include/linux/list.h:994 [inline] RIP: 0010:__alloc_object lib/debugobjects.c:232 [inline] RIP: 0010:pcpu_alloc+0x1a8/0x300 lib/debugobjects.c:256 Code: 2e 4c 89 e8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ef e8 0c d2 3e fd 49 89 5d 00 48 85 db 74 1c 48 83 c3 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 ea d1 3e fd 4c 89 2b 41 80 3c 2f 00 RSP: 0018:ffffc900038a6f60 EFLAGS: 00010006 RAX: 0c2c2c2c2c2c2c2d RBX: 6161616161616169 RCX: 0000000000000001 RDX: ffffffff8c09c480 RSI: ffffffff8c5e9080 RDI: ffffffff8c5e9040 RBP: dffffc0000000000 R08: 0000000000000003 R09: fffff52000714ddc R10: dffffc0000000000 R11: fffff52000714ddc R12: 1ffff1100f228801 R13: ffff8880b863fe00 R14: ffff888079144008 R15: 1ffff1100f228800 FS: 000055555fac2500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555915bb808 CR3: 000000001cad4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> alloc_object+0xbf/0x310 lib/debugobjects.c:458 lookup_object_or_alloc lib/debugobjects.c:685 [inline] __debug_object_init+0x185/0x470 lib/debugobjects.c:743 ieee80211_alloc_hw_nm+0x126e/0x1ea0 net/mac80211/main.c:976 mac80211_hwsim_new_radio+0x1db/0x4a90 drivers/net/wireless/virtual/mac80211_hwsim.c:5146 hwsim_new_radio_nl+0xece/0x2290 drivers/net/wireless/virtual/mac80211_hwsim.c:6203 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 __sys_sendto+0x363/0x4c0 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f811ad826dc Code: 2a 5a 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5a 02 00 48 8b RSP: 002b:00007ffd7f24e760 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f811ba74620 RCX: 00007f811ad826dc RDX: 0000000000000024 RSI: 00007f811ba74670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd7f24e7b4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f811ba74670 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__hlist_del include/linux/list.h:982 [inline] RIP: 0010:hlist_del include/linux/list.h:994 [inline] RIP: 0010:__alloc_object lib/debugobjects.c:232 [inline] RIP: 0010:pcpu_alloc+0x1a8/0x300 lib/debugobjects.c:256 Code: 2e 4c 89 e8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ef e8 0c d2 3e fd 49 89 5d 00 48 85 db 74 1c 48 83 c3 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 ea d1 3e fd 4c 89 2b 41 80 3c 2f 00 RSP: 0018:ffffc900038a6f60 EFLAGS: 00010006 RAX: 0c2c2c2c2c2c2c2d RBX: 6161616161616169 RCX: 0000000000000001 RDX: ffffffff8c09c480 RSI: ffffffff8c5e9080 RDI: ffffffff8c5e9040 RBP: dffffc0000000000 R08: 0000000000000003 R09: fffff52000714ddc R10: dffffc0000000000 R11: fffff52000714ddc R12: 1ffff1100f228801 R13: ffff8880b863fe00 R14: ffff888079144008 R15: 1ffff1100f228800 FS: 000055555fac2500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555915bb808 CR3: 000000001cad4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 2e 4c 89 e8 cs mov %r13,%rax 4: 48 c1 e8 03 shr $0x3,%rax 8: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) c: 74 08 je 0x16 e: 4c 89 ef mov %r13,%rdi 11: e8 0c d2 3e fd call 0xfd3ed222 16: 49 89 5d 00 mov %rbx,0x0(%r13) 1a: 48 85 db test %rbx,%rbx 1d: 74 1c je 0x3b 1f: 48 83 c3 08 add $0x8,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 ea d1 3e fd call 0xfd3ed222 38: 4c 89 2b mov %r13,(%rbx) 3b: 41 80 3c 2f 00 cmpb $0x0,(%r15,%rbp,1) --- 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@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, 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 overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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