Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 3 PID: 10585 Comm: syz-executor.1 Not tainted 6.10.0-rc2-syzkaller-00007-gf06ce441457d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:put_pwq_unlocked kernel/workqueue.c:1662 [inline] RIP: 0010:put_pwq_unlocked kernel/workqueue.c:1655 [inline] RIP: 0010:apply_wqattrs_cleanup.part.0+0xbc/0x2b0 kernel/workqueue.c:5223 Code: dd 28 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 8e 01 00 00 48 8b 5c dd 28 48 85 db 74 41 e8 4b ce 35 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 92 01 00 00 48 8b 3b e8 21 70 87 09 48 89 df RSP: 0018:ffffc900030a70c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8158b0d7 RDX: ffff888057892440 RSI: ffffffff8158b125 RDI: ffff8880644b8028 RBP: ffff8880644b8000 R08: 0000000000000005 R09: 0000000000000007 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: fffffbfff1a92c7d R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:0000000057549400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000056358cdf0f48 CR3: 000000005beaa000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apply_wqattrs_cleanup kernel/workqueue.c:5222 [inline] apply_workqueue_attrs_locked+0x9e/0xe0 kernel/workqueue.c:5344 apply_workqueue_attrs kernel/workqueue.c:5374 [inline] alloc_and_link_pwqs kernel/workqueue.c:5495 [inline] alloc_workqueue+0x1256/0x1ca0 kernel/workqueue.c:5717 ieee80211_register_hw+0x1fb5/0x4390 net/mac80211/main.c:1460 mac80211_hwsim_new_radio+0x265b/0x5150 drivers/net/wireless/virtual/mac80211_hwsim.c:5470 hwsim_new_radio_nl+0xaf9/0x1240 drivers/net/wireless/virtual/mac80211_hwsim.c:6151 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2564 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_compat_sys_socketcall+0x5e2/0x700 net/compat.c:475 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72e9579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ff9be150 EFLAGS: 00000293 ORIG_RAX: 0000000000000066 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000ff9be164 RDX: 0000000000000000 RSI: 00000000f7f8f568 RDI: 00000000f743fff4 RBP: 00000000f7f8f568 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:put_pwq_unlocked kernel/workqueue.c:1662 [inline] RIP: 0010:put_pwq_unlocked kernel/workqueue.c:1655 [inline] RIP: 0010:apply_wqattrs_cleanup.part.0+0xbc/0x2b0 kernel/workqueue.c:5223 Code: dd 28 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 8e 01 00 00 48 8b 5c dd 28 48 85 db 74 41 e8 4b ce 35 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 92 01 00 00 48 8b 3b e8 21 70 87 09 48 89 df RSP: 0018:ffffc900030a70c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8158b0d7 RDX: ffff888057892440 RSI: ffffffff8158b125 RDI: ffff8880644b8028 RBP: ffff8880644b8000 R08: 0000000000000005 R09: 0000000000000007 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: fffffbfff1a92c7d R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:0000000057549400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007ffdcf65f9f8 CR3: 000000005beaa000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: dd 28 (bad) (%rax) 2: 48 89 f8 mov %rdi,%rax 5: 48 c1 e8 03 shr $0x3,%rax 9: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) e: 0f 85 8e 01 00 00 jne 0x1a2 14: 48 8b 5c dd 28 mov 0x28(%rbp,%rbx,8),%rbx 19: 48 85 db test %rbx,%rbx 1c: 74 41 je 0x5f 1e: e8 4b ce 35 00 call 0x35ce6e 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 0f 85 92 01 00 00 jne 0x1c7 35: 48 8b 3b mov (%rbx),%rdi 38: e8 21 70 87 09 call 0x987705e 3d: 48 89 df mov %rbx,%rdi