From: syzbot <syzbot+d979bd35c8a76fd1b6f5@syzkaller.appspotmail.com>
To: kartikey406@gmail.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [wireless?] BUG: using smp_processor_id() in preemptible code in ieee80211_tx_control_port
Date: Wed, 09 Sep 2026 22:37:02 -0700 [thread overview]
Message-ID: <6aa241fe.f81106d8.2ab401.0007.GAE@google.com> (raw)
In-Reply-To: <20260910040733.22352-1-kartikey406@gmail.com>
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
**
[ 1.792715][ T0] ** **
[ 1.798501][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.803965][ T0] ** **
[ 1.809538][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.814932][ T0] **********************************************************
[ 1.821752][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 1.943270][ T0] allocated 167772160 bytes of page_ext
[ 1.947602][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 1.966625][ T0] Node 0, zone DMA32: page owner found early allocated 21251 pages
[ 1.974793][ T0] Node 0, zone Normal: page owner found early allocated 0 pages
[ 1.991039][ T0] Node 1, zone Normal: page owner found early allocated 19847 pages
[ 1.995618][ T0] Kernel/User page tables isolation: enabled
[ 1.999791][ T0] Dynamic Preempt: full
[ 2.003321][ T0] Running RCU self tests
[ 2.005099][ T0] Running RCU synchronous self tests
[ 2.007600][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 2.010877][ T0] rcu: RCU lockdep checking is enabled.
[ 2.013334][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 2.015732][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 2.018694][ T0] rcu: RCU debug extended QS entry/exit.
[ 2.021124][ T0] All grace periods are expedited (rcu_expedited).
[ 2.023924][ T0] Trampoline variant of Tasks RCU enabled.
[ 2.026688][ T0] Tracing variant of Tasks RCU enabled.
[ 2.028337][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 2.031013][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 2.034109][ T0] Running RCU synchronous self tests
[ 2.036292][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 2.228766][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 2.232489][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 2.235324][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 2.239827][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 2.245084][ T0] Console: colour VGA+ 80x25
[ 2.247483][ T0] printk: console [ttyS0] enabled
[ 2.247483][ T0] printk: console [ttyS0] enabled
[ 2.251866][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.251866][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.257603][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 2.261940][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 2.263749][ T0] ... MAX_LOCK_DEPTH: 48
[ 2.265687][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 2.267675][ T0] ... CLASSHASH_SIZE: 4096
[ 2.269952][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 2.272157][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 2.275305][ T0] ... CHAINHASH_SIZE: 524288
[ 2.277682][ T0] memory used by lock dependency info: 106625 kB
[ 2.280361][ T0] memory used for stack traces: 8320 kB
[ 2.282414][ T0] per task-struct memory footprint: 1920 bytes
[ 2.285615][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 2.291031][ T0] ACPI: Core revision 20260408
[ 2.294830][ T0] APIC: Switch to symmetric I/O mode setup
[ 2.298246][ T0] x2apic enabled
[ 2.305430][ T0] APIC: Switched APIC routing to: physical x2apic
[ 2.318262][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 2.323719][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 2.329358][ T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[ 2.334112][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 2.339354][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 2.343080][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 2.349359][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 2.354378][ T0] Spectre V2 : Mitigation: IBRS
[ 2.359359][ T0] RETBleed: Mitigation: IBRS
[ 2.361241][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 2.364946][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 2.367565][ T0] MDS: Mitigation: Clear CPU buffers
[ 2.369355][ T0] TAA: Mitigation: Clear CPU buffers
[ 2.372469][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 2.376323][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 2.379361][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 2.383706][ T0] Spectre V2 : Enabling IBPB for BPF
[ 2.385950][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 2.389403][ T0] active return thunk: its_return_thunk
[ 2.392147][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 2.396573][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 2.399361][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 2.402238][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 2.409363][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 2.412569][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 2.419801][ T0] ------------[ cut here ]------------
[ 2.422413][ T0] CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 140600
[ 2.427891][ T0] WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820, CPU#0: swapper/0/0
[ 2.429359][ T0] Modules linked in:
[ 2.431164][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.434927][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.439361][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.442491][ T0] Code: 00 00 e8 aa d6 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 99 02 0f 48 8b b4 24 a0 00 00 00 4c 89 f2 4c 8b 4c 24 50 <67> 48 0f b9 3a e9 8d 00 00 00 e8 78 d6 4d 00 4c 89 f8 48 c1 e8 03
[ 2.449361][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.459359][ T0] RAX: ffffffff817ac2e6 RBX: 8000000140600023 RCX: ffffffffa0000000
[ 2.462919][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d5c00
[ 2.466637][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
[ 2.469359][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.473051][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.476352][ T0] FS: 0000000000000000(0000) GS:ffff888124caa000(0000) knlGS:0000000000000000
[ 2.479359][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.482418][ T0] CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0
[ 2.486229][ T0] Call Trace:
[ 2.489362][ T0] <TASK>
[ 2.491233][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.494256][ T0] ? __purge_vmap_area_lazy+0x8ec/0xab0
[ 2.497016][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.499360][ T0] ? __might_resched+0x71/0x4c0
[ 2.502118][ T0] ? down_read+0x2b9/0x320
[ 2.503975][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.506152][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.509369][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.511042][ T0] set_memory_x+0xd6/0x110
[ 2.512710][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.514452][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.517209][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.519368][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.521794][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.524279][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.526697][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.529359][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.531318][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.533529][ T0] alternative_instructions+0x3a/0x100
[ 2.535912][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.537927][ T0] start_kernel+0x310/0x3e0
[ 2.539365][ T0] x86_64_start_reservations+0x24/0x30
[ 2.542812][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.544878][ T0] common_startup_64+0x13e/0x157
[ 2.547017][ T0] </TASK>
[ 2.549359][ T0] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 2.552768][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.557207][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.559341][ T0] Call Trace:
[ 2.559341][ T0] <TASK>
[ 2.559341][ T0] vpanic+0x56d/0xa70
[ 2.559341][ T0] ? __pfx__printk+0x10/0x10
[ 2.559341][ T0] ? __pfx_vpanic+0x10/0x10
[ 2.559341][ T0] ? is_bpf_text_address+0x292/0x2b0
[ 2.559341][ T0] ? is_bpf_text_address+0x26/0x2b0
[ 2.559341][ T0] panic+0xc5/0xd0
[ 2.559341][ T0] ? __pfx_panic+0x10/0x10
[ 2.559341][ T0] ? common_startup_64+0x13e/0x157
[ 2.559341][ T0] __warn+0x315/0x4c0
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.559341][ T0] __report_bug+0x276/0x570
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.559341][ T0] ? __pfx___report_bug+0x10/0x10
[ 2.559341][ T0] report_bug_entry+0x19b/0x290
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d79/0x2820
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d7e/0x2820
[ 2.559341][ T0] handle_bug+0xce/0x200
[ 2.559341][ T0] exc_invalid_op+0x1a/0x50
[ 2.559341][ T0] asm_exc_invalid_op+0x1a/0x20
[ 2.559341][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.559341][ T0] Code: 00 00 e8 aa d6 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 99 02 0f 48 8b b4 24 a0 00 00 00 4c 89 f2 4c 8b 4c 24 50 <67> 48 0f b9 3a e9 8d 00 00 00 e8 78 d6 4d 00 4c 89 f8 48 c1 e8 03
[ 2.559341][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.559341][ T0] RAX: ffffffff817ac2e6 RBX: 8000000140600023 RCX: ffffffffa0000000
[ 2.559341][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d5c00
[ 2.559341][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
[ 2.559341][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.559341][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d56/0x2820
[ 2.559341][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.559341][ T0] ? __purge_vmap_area_lazy+0x8ec/0xab0
[ 2.559341][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.559341][ T0] ? __might_resched+0x71/0x4c0
[ 2.559341][ T0] ? down_read+0x2b9/0x320
[ 2.559341][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.559341][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.559341][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.559341][ T0] set_memory_x+0xd6/0x110
[ 2.559341][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.559341][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.559341][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.559341][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.559341][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.559341][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.559341][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.559341][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.559341][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.559341][ T0] alternative_instructions+0x3a/0x100
[ 2.559341][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.559341][ T0] start_kernel+0x310/0x3e0
[ 2.559341][ T0] x86_64_start_reservations+0x24/0x30
[ 2.559341][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.559341][ T0] common_startup_64+0x13e/0x157
[ 2.559341][ T0] </TASK>
[ 2.559341][ T0] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1689222315=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at 8387c27382b
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=8387c27382b21161a70829b74fa8d5e67db1d2fc -X github.com/google/syzkaller/prog.gitRevisionDate=20260908-183216" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=8387c27382b21161a70829b74fa8d5e67db1d2fc -X github.com/google/syzkaller/prog.gitRevisionDate=20260908-183216" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=8387c27382b21161a70829b74fa8d5e67db1d2fc -X github.com/google/syzkaller/prog.gitRevisionDate=20260908-183216" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"8387c27382b21161a70829b74fa8d5e67db1d2fc\"
/usr/bin/ld: /tmp/ccGskpE3.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=12469ef9580000
Tested on:
commit: c68a9828 Add linux-next specific files for 20260909
git tree: linux-next
kernel config: https://syzkaller.appspot.com/x/.config?x=6a696a9324965b3e
dashboard link: https://syzkaller.appspot.com/bug?extid=d979bd35c8a76fd1b6f5
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=103cc601580000
next parent reply other threads:[~2026-09-10 5:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260910040733.22352-1-kartikey406@gmail.com>
2026-09-10 5:37 ` syzbot [this message]
2026-09-09 22:44 syzbot
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