Extracting prog: 2m13.705410654s
Minimizing prog: 5m2.194818114s
Simplifying prog options: 5m10.098007873s
Extracting C: 1m41.84344809s
Simplifying C: 0s
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY-openat$cgroup_root-bpf$PROG_LOAD-bpf$BPF_PROG_DETACH
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)
r0 = openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
r1 = bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f00000008c0)=ANY=[@ANYBLOB="180000000000000000000000000000006112000000000000950000000000000051fa7824c74186dc02ec0696c37b64e3b24da3180100000005165c0f63cdc2e82818254950ee03568b8809a1ff4c7c4750eabfafcb9531b31e6a86827d1010c5a909ab98e00e19644a88e95ba26d1c9eecddb2d11c541418ceeb29b9b6829c6e433822bdb3cc85244aab60c1aae1314d7381fcfeb970bea672cf1e926f6a51479343144648a07a975bd89dc398712376610f6254f12495b4658319684387f6f3543205d4bc4ce05b8b961103673dff7f158052e62b20f05fd24108d8363d44fcd0f8f3647899762a17282a1914452d11f557c28f396eebdc858558db0276d14f9035f2b5f703e5be7e4acf8b78c2834ae5805fffee38a9a0033d520bcf6b08ede50899d4b9bdf85c71c5de2503dab358f42a2624c7daa9ed44039aab46419496362e54cfad05a0004ac71a003d7b85d07191bed4e5a890826300214146f7ed569985439baa355c2766dd056f5d79e454f3d873095e7a237bc06d035a8d601f21746d886419f38b34a495040000000071c2f0cce8c93cc17e9afa314fcb2ba15d646c66b0f65021829f87d988b4e2d71753b1549fa734f0b2e56dbd21ed2e09d0cddad721971637f384eed3034597c93e1c52f42cad0ed09c395dc6e9703660fefa1c80f467367c006f25caf0cbcefd13d68839893e39c588eb032905f91cafa4996dbf0c9be9654db05fb918086cc8228d02a3092c0830b8f587a5624515298b2d4eb2bde6f9a2eb83d53f717f13fa7552d92c51dbd32ea50c490ecd085d2811a7555c538cffffff7f00000000dd872244bfa64779e0f43a9c277e2910b7ccdc3d6726d34ad2101033a623ca2a49ad344884289130bc71cee2b7de62bf48129ae1af052a2d46a61625735a9eea7f793946b3229e861d8ea49806b3f7d4295f6b000000000000f337b1ceb2d8a65dcdcd895d7ba37098d2593fdaaef445af5bee02019c00000099b13ecda2a5b37de0519e974cba92ebaf0f701611a9b027ce04340bda4594cc9049c3f101629ab028145e004209ebe71a6fe84af50804000000000000004a27213354964e250a98fe357676f94b6947383e320fbb1118f586d5b9b1b977e1e1a4490ff67703a9b5900f8a6f8a805879dd91ec5ff435b219c53680c0ae04dcc4ef69b98fcb0d6b6a03a8b71a66b4e2876dc4b610444bf10000000000b046b6ae5d68156bcbd6d8793ade9a22ac8fc7857e5bbc14adc4e12b08f350c6789283b9990c72e64372a1f79769a8bdc632fc1a0b3417855d8b7d25ca4d404c23631ad3d2f55dcd385371c86170a4bca58c2b2b4eabc365f45bd10bb45b0c5bc354456a52be18d9b44014d20a3c51c8f013dade83562e73278662829e4f5a9ac00fd91178468c737f0872d97d38d11a176be5a0d7294c51eb161eddcfefa8837c7430721851ec2a107af0df6d43e732bbc01e76c66895eb85d36798d61622773591ee21ad9f6a1b73fa9cf3ffeb8a00b63af800a81d0fb8aa29df8b8ad6fbafefb5802a23cbdeeabceda5bfc5ff2fa5c1d61d04a1324794c6ed000696d9f04010c35474e690545c3d9bd836d4cef2585ba616e01c3d000000000000000000470ebc6f3453ecbf3047e4547d7632d3ad21798e730cb5d1da059b5bdb8107815dff995c0788906790406dfb4f8ee9f24ff94233e2e6e581e6e5de33a5f254c9a8b612547473c3001df3928dac9203b744619082421a8da7c00000000000000000000000000000018a73ef40cca690fb7595c6962984f8276677be6f66cbdbccf1896433808c9c84d74ac4a7c186a04a2250972f7acb156b21f9826b6acb7db32c4e3b3ec8b59fd972975edb1da872d81a35e4fda2f5cbde6b40bea20418c6e9dad30b791eea58f53e80fee4dd7fe08373ea2784fcd3a65261de71eb866458d2c22a"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)
bpf$BPF_PROG_DETACH(0x8, &(0x7f0000000040)={@cgroup=r0, r1, 0x2, 0x2, 0x0, @void, @value}, 0x10)
program crashed: possible deadlock in ieee80211_remove_interfaces
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=49.210253185s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY-openat$cgroup_root-bpf$PROG_LOAD
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)
openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x9, 0x4, &(0x7f00000008c0)=ANY=[@ANYBLOB="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"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @cgroup_sock, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x70)
program crashed: possible deadlock in ieee80211_remove_interfaces
testing program (duration=49.210253185s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY-openat$cgroup_root
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)
openat$cgroup_root(0xffffffffffffff9c, &(0x7f0000000000), 0x200002, 0x0)
program crashed: possible deadlock in ieee80211_remove_interfaces
testing program (duration=49.210253185s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, &(0x7f0000000240)={0x0, 0xffffffffffffffff, 0x0, 0x7, &(0x7f0000000000)='cgroup\x00'}, 0x30)
program crashed: possible deadlock in ieee80211_remove_interfaces
testing program (duration=49.210253185s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, 0x0, 0x0)
program crashed: possible deadlock in ieee80211_remove_interfaces
extracting C reproducer
testing compiled C program (duration=49.210253185s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
program did not crash
simplifying guilty program options
testing program (duration=49.210253185s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, 0x0, 0x0)
program crashed: possible deadlock in ieee80211_remove_interfaces
extracting C reproducer
testing compiled C program (duration=49.210253185s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
program did not crash
testing program (duration=49.210253185s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
detailed listing:
executing program 0:
bpf$BPF_TASK_FD_QUERY(0x14, 0x0, 0x0)
program crashed: possible deadlock in ieee80211_remove_interfaces
extracting C reproducer
testing compiled C program (duration=49.210253185s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): bpf$BPF_TASK_FD_QUERY
program did not crash
reproducing took 13m28.674094744s
repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
6.13.0-syzkaller-g8784714d7f27 #0 Not tainted
------------------------------------------------------
kworker/u8:0/11 is trying to acquire lock:
ffffffff8fed6808 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_acquire_if_cleanup_net net/core/dev.c:10272 [inline]
ffffffff8fed6808 (rtnl_mutex){+.+.}-{4:4}, at: unregister_netdevice_many_notify+0xac2/0x2030 net/core/dev.c:11792
but task is already holding lock:
ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline]
ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_remove_interfaces+0x129/0x700 net/mac80211/iface.c:2280
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&rdev->wiphy.mtx){+.+.}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
wiphy_lock include/net/cfg80211.h:6046 [inline]
wiphy_register+0x1913/0x2650 net/wireless/core.c:1003
ieee80211_register_hw+0x35d9/0x42e0 net/mac80211/main.c:1587
mac80211_hwsim_new_radio+0x2ae8/0x4a40 drivers/net/wireless/virtual/mac80211_hwsim.c:5558
init_mac80211_hwsim+0x87a/0xb00 drivers/net/wireless/virtual/mac80211_hwsim.c:6910
do_one_initcall+0x248/0x930 init/main.c:1257
do_initcall_level+0x157/0x210 init/main.c:1319
do_initcalls+0x71/0xd0 init/main.c:1335
kernel_init_freeable+0x435/0x5d0 init/main.c:1568
kernel_init+0x1d/0x2b0 init/main.c:1457
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (rtnl_mutex){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
rtnl_acquire_if_cleanup_net net/core/dev.c:10272 [inline]
unregister_netdevice_many_notify+0xac2/0x2030 net/core/dev.c:11792
unregister_netdevice_many net/core/dev.c:11875 [inline]
unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11741
unregister_netdevice include/linux/netdevice.h:3329 [inline]
_cfg80211_unregister_wdev+0x163/0x590 net/wireless/core.c:1248
ieee80211_remove_interfaces+0x4ef/0x700 net/mac80211/iface.c:2305
ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1681
mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5664
hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6544
ops_exit_list net/core/net_namespace.c:172 [inline]
cleanup_net+0x812/0xd60 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rdev->wiphy.mtx);
lock(rtnl_mutex);
lock(&rdev->wiphy.mtx);
lock(rtnl_mutex);
*** DEADLOCK ***
4 locks held by kworker/u8:0/11:
#0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317
#1: ffffc90000107c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc90000107c60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317
#2: ffffffff8feca0d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17a/0xd60 net/core/net_namespace.c:606
#3: ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline]
#3: ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_remove_interfaces+0x129/0x700 net/mac80211/iface.c:2280
stack backtrace:
CPU: 1 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.13.0-syzkaller-g8784714d7f27 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
rtnl_acquire_if_cleanup_net net/core/dev.c:10272 [inline]
unregister_netdevice_many_notify+0xac2/0x2030 net/core/dev.c:11792
unregister_netdevice_many net/core/dev.c:11875 [inline]
unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11741
unregister_netdevice include/linux/netdevice.h:3329 [inline]
_cfg80211_unregister_wdev+0x163/0x590 net/wireless/core.c:1248
ieee80211_remove_interfaces+0x4ef/0x700 net/mac80211/iface.c:2305
ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1681
mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5664
hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6544
ops_exit_list net/core/net_namespace.c:172 [inline]
cleanup_net+0x812/0xd60 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
final repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
6.13.0-syzkaller-g8784714d7f27 #0 Not tainted
------------------------------------------------------
kworker/u8:0/11 is trying to acquire lock:
ffffffff8fed6808 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_acquire_if_cleanup_net net/core/dev.c:10272 [inline]
ffffffff8fed6808 (rtnl_mutex){+.+.}-{4:4}, at: unregister_netdevice_many_notify+0xac2/0x2030 net/core/dev.c:11792
but task is already holding lock:
ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline]
ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_remove_interfaces+0x129/0x700 net/mac80211/iface.c:2280
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&rdev->wiphy.mtx){+.+.}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
wiphy_lock include/net/cfg80211.h:6046 [inline]
wiphy_register+0x1913/0x2650 net/wireless/core.c:1003
ieee80211_register_hw+0x35d9/0x42e0 net/mac80211/main.c:1587
mac80211_hwsim_new_radio+0x2ae8/0x4a40 drivers/net/wireless/virtual/mac80211_hwsim.c:5558
init_mac80211_hwsim+0x87a/0xb00 drivers/net/wireless/virtual/mac80211_hwsim.c:6910
do_one_initcall+0x248/0x930 init/main.c:1257
do_initcall_level+0x157/0x210 init/main.c:1319
do_initcalls+0x71/0xd0 init/main.c:1335
kernel_init_freeable+0x435/0x5d0 init/main.c:1568
kernel_init+0x1d/0x2b0 init/main.c:1457
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (rtnl_mutex){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
rtnl_acquire_if_cleanup_net net/core/dev.c:10272 [inline]
unregister_netdevice_many_notify+0xac2/0x2030 net/core/dev.c:11792
unregister_netdevice_many net/core/dev.c:11875 [inline]
unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11741
unregister_netdevice include/linux/netdevice.h:3329 [inline]
_cfg80211_unregister_wdev+0x163/0x590 net/wireless/core.c:1248
ieee80211_remove_interfaces+0x4ef/0x700 net/mac80211/iface.c:2305
ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1681
mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5664
hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6544
ops_exit_list net/core/net_namespace.c:172 [inline]
cleanup_net+0x812/0xd60 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rdev->wiphy.mtx);
lock(rtnl_mutex);
lock(&rdev->wiphy.mtx);
lock(rtnl_mutex);
*** DEADLOCK ***
4 locks held by kworker/u8:0/11:
#0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317
#1: ffffc90000107c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc90000107c60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317
#2: ffffffff8feca0d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17a/0xd60 net/core/net_namespace.c:606
#3: ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline]
#3: ffff88806e698768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_remove_interfaces+0x129/0x700 net/mac80211/iface.c:2280
stack backtrace:
CPU: 1 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.13.0-syzkaller-g8784714d7f27 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
rtnl_acquire_if_cleanup_net net/core/dev.c:10272 [inline]
unregister_netdevice_many_notify+0xac2/0x2030 net/core/dev.c:11792
unregister_netdevice_many net/core/dev.c:11875 [inline]
unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11741
unregister_netdevice include/linux/netdevice.h:3329 [inline]
_cfg80211_unregister_wdev+0x163/0x590 net/wireless/core.c:1248
ieee80211_remove_interfaces+0x4ef/0x700 net/mac80211/iface.c:2305
ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1681
mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5664
hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6544
ops_exit_list net/core/net_namespace.c:172 [inline]
cleanup_net+0x812/0xd60 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244