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Thu, 13 Nov 2025 16:07:01 -0800 (PST) Date: Thu, 13 Nov 2025 16:07:01 -0800 In-Reply-To: <20251114002129.61852-1-mehdi.benhadjkhelifa@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691672a5.a70a0220.3124cb.0039.GAE@google.com> Subject: Re: [syzbot] [hfs?] memory leak in hfs_init_fs_context From: syzbot To: linux-kernel@vger.kernel.org, mehdi.benhadjkhelifa@gmail.com, syzkaller-bugs@googlegroups.com, syzkaller@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: ocol family [ 12.356386][ T1] 9pnet: Installing 9P2000 support [ 12.357387][ T1] NET: Registered PF_CAIF protocol family [ 12.359598][ T1] NET: Registered PF_IEEE802154 protocol family [ 12.360820][ T1] Key type dns_resolver registered [ 12.362055][ T1] Key type ceph registered [ 12.362972][ T1] libceph: loaded (mon/osd proto 15/24) [ 12.364812][ T1] batman_adv: B.A.T.M.A.N. advanced 2025.4 (compatibil= ity version 15) loaded [ 12.366182][ T1] openvswitch: Open vSwitch switching datapath [ 12.367782][ T1] NET: Registered PF_VSOCK protocol family [ 12.368848][ T1] mpls_gso: MPLS GSO support [ 12.392435][ T1] IPI shorthand broadcast: enabled [ 12.628894][ T1] sched_clock: Marking stable (12590011719, 31029087)-= >(12629106451, -8065645) [ 12.638998][ T1] registered taskstats version 1 [ 12.648379][ T1] Loading compiled-in X.509 certificates [ 12.699133][ T1] Loaded X.509 cert 'Build time autogenerated kernel k= ey: d488cbc2e071d1aa06eea7feaf70de2187f78c53' [ 12.744621][ T1] zswap: loaded using pool 842 [ 12.749914][ T1] Demotion targets for Node 0: null [ 12.755145][ T1] Demotion targets for Node 1: null [ 12.760384][ T1] kmemleak: Kernel memory leak detector initialized (m= em pool available: 15732) [ 12.769760][ T1] Key type .fscrypt registered [ 12.774552][ T1] Key type fscrypt-provisioning registered [ 12.781620][ T1] kAFS: Red Hat AFS client v0.1 registering. [ 12.790548][ T1] Btrfs loaded, assert=3Don, zoned=3Dyes, fsverity=3Dy= es [ 12.797582][ T1] Key type big_key registered [ 12.802295][ T1] Key type encrypted registered [ 12.807171][ T1] AppArmor: AppArmor sha256 policy hashing enabled [ 12.813703][ T1] ima: No TPM chip found, activating TPM-bypass! [ 12.820129][ T1] Loading compiled-in module X.509 certificates [ 12.870006][ T1] Loaded X.509 cert 'Build time autogenerated kernel k= ey: d488cbc2e071d1aa06eea7feaf70de2187f78c53' [ 12.880814][ T1] ima: Allocated hash algorithm: sha256 [ 12.886586][ T1] ima: No architecture policies found [ 12.892082][ T1] evm: Initialising EVM extended attributes: [ 12.898045][ T1] evm: security.selinux (disabled) [ 12.903188][ T1] evm: security.SMACK64 (disabled) [ 12.908308][ T1] evm: security.SMACK64EXEC (disabled) [ 12.913772][ T1] evm: security.SMACK64TRANSMUTE (disabled) [ 12.919669][ T1] evm: security.SMACK64MMAP (disabled) [ 12.925137][ T1] evm: security.apparmor [ 12.929367][ T1] evm: security.ima [ 12.933210][ T1] evm: security.capability [ 12.937621][ T1] evm: HMAC attrs: 0x1 [ 12.942363][ T1] PM: Magic number: 1:891:1009 [ 12.947794][ T1] netconsole: network logging started [ 12.953395][ T1] gtp: GTP module loaded (pdp ctx size 128 bytes) [ 12.961366][ T1] rdma_rxe: loaded [ 12.965484][ T1] cfg80211: Loading compiled-in X.509 certificates for= regulatory database [ 12.975828][ T1] Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' [ 12.983699][ T1] Loaded X.509 cert 'wens: 61c038651aabdcf94bd0ac7ff06= c7248db18c600' [ 12.992052][ T3096] faux_driver regulatory: Direct firmware load for reg= ulatory.db failed with error -2 [ 13.001170][ T1] clk: Disabling unused clocks [ 13.001625][ T3096] faux_driver regulatory: Falling back to sysfs fallba= ck for: regulatory.db [ 13.006350][ T1] ALSA device list: [ 13.018837][ T1] #0: Dummy 1 [ 13.022303][ T1] #1: Loopback 1 [ 13.026009][ T1] #2: Virtual MIDI Card 1 [ 13.031911][ T1] check access for rdinit=3D/init failed: -2, ignoring [ 13.038581][ T1] md: Waiting for all devices to be available before a= utodetect [ 13.046224][ T1] md: If you don't use raid, use raid=3Dnoautodetect [ 13.052720][ T1] md: Autodetecting RAID arrays. [ 13.057648][ T1] md: autorun ... [ 13.061368][ T1] md: ... autorun DONE. [ 13.182345][ T1] EXT4-fs (sda1): orphan cleanup on readonly fs [ 13.191140][ T1] EXT4-fs (sda1): mounted filesystem 4f91c6db-4997-4bb= 4-91b8-7e83a20c1bf1 ro with ordered data mode. Quota mode: none. [ 13.203709][ T1] VFS: Mounted root (ext4 filesystem) readonly on devi= ce 8:1. [ 13.212657][ T1] devtmpfs: mounted [ 13.222294][ T1] Freeing unused kernel image (initmem) memory: 16140K [ 13.230584][ T1] Write protecting the kernel read-only data: 94208k [ 13.240931][ T1] Freeing unused kernel image (text/rodata gap) memory= : 1156K [ 13.249727][ T1] Freeing unused kernel image (rodata/data gap) memory= : 964K [ 13.408312][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages f= ound. [ 13.416107][ T1] x86/mm: Checking user space page tables [ 13.559233][ T1] x86/mm: Checked W+X mappings: passed, no W+X pages f= ound. [ 13.566791][ T1] Failed to set sysctl parameter 'kernel.hung_task_all= _cpu_backtrace=3D1': parameter not found [ 13.579439][ T1] Failed to set sysctl parameter 'max_rcu_stall_to_pan= ic=3D1': parameter not found [ 13.588985][ T1] Run /sbin/init as init process [ 13.928520][ T1] kmemleak: Cannot insert 0xffff8881098de400 into the = object search tree (overlaps existing) [ 13.928535][ T1] CPU: 1 UID: 0 PID: 1 Comm: init Not tainted syzkalle= r #0 PREEMPT(full)=20 [ 13.928553][ T1] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 10/25/2025 [ 13.928561][ T1] Call Trace: [ 13.928565][ T1] [ 13.928569][ T1] dump_stack_lvl+0xab/0xe0 [ 13.928613][ T1] __link_object+0x194/0x210 [ 13.928634][ T1] __create_object+0x48/0x80 [ 13.928658][ T1] __kmalloc_cache_noprof+0x3a6/0x5b0 [ 13.928688][ T1] ? ima_add_digest_entry+0x32/0x1c0 [ 13.928719][ T1] ? ima_add_digest_entry+0x32/0x1c0 [ 13.928740][ T1] ima_add_digest_entry+0x32/0x1c0 [ 13.928763][ T1] ima_add_template_entry+0x28a/0x340 [ 13.928788][ T1] ima_store_template+0x7f/0xd0 [ 13.928814][ T1] ima_store_measurement+0x134/0x290 [ 13.928841][ T1] process_measurement+0x11a2/0x12d0 [ 13.928868][ T1] ima_file_check+0x66/0x90 [ 13.928890][ T1] security_file_post_open+0x8e/0x210 [ 13.928907][ T1] path_openat+0x9c0/0x1eb0 [ 13.928923][ T1] ? nd_jump_root+0x60/0x1b0 [ 13.928948][ T1] do_filp_open+0x102/0x1f0 [ 13.928966][ T1] do_sys_openat2+0xc1/0x140 [ 13.928988][ T1] __x64_sys_openat+0xb2/0x100 [ 13.929010][ T1] do_syscall_64+0xa4/0xfa0 [ 13.929032][ T1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.929048][ T1] RIP: 0033:0x7f697b4470ba [ 13.929059][ T1] Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f= 0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0= f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24 [ 13.929074][ T1] RSP: 002b:00007ffef00e24a8 EFLAGS: 00000206 ORIG_RAX= : 0000000000000101 [ 13.929087][ T1] RAX: ffffffffffffffda RBX: 00007ffef00e2520 RCX: 000= 07f697b4470ba [ 13.929099][ T1] RDX: 0000000000080000 RSI: 00007ffef00e2520 RDI: 000= 00000ffffff9c [ 13.929108][ T1] RBP: 00007ffef00e2510 R08: 00007ffef00e2717 R09: 000= 0000000000000 [ 13.929117][ T1] R10: 0000000000000000 R11: 0000000000000206 R12: 000= 000000000001b [ 13.929126][ T1] R13: 00007f697b41b050 R14: 00007ffef00e2730 R15: 000= 0000000000000 [ 13.929137][ T1] [ 13.929148][ T1] kmemleak: Kernel memory leak detector disabled [ 13.929153][ T1] kmemleak: Object 0xffff8881098de400 (size 64): [ 13.929161][ T1] kmemleak: comm "init", pid 1, jiffies 4294938627 [ 13.929169][ T1] kmemleak: min_count =3D 1 [ 13.929173][ T1] kmemleak: count =3D 0 [ 13.929177][ T1] kmemleak: flags =3D 0x1 [ 13.929181][ T1] kmemleak: checksum =3D 0 [ 13.929186][ T1] kmemleak: backtrace: [ 13.929189][ T1] __kmalloc_noprof+0x3e3/0x6b0 [ 13.929203][ T1] ima_write_template_field_data+0x56/0x150 [ 13.929221][ T1] ima_eventdigest_init_common+0x10a/0x270 [ 13.929238][ T1] ima_alloc_init_template+0x16d/0x250 [ 13.929264][ T1] ima_store_measurement+0x100/0x290 [ 13.929289][ T1] process_measurement+0x11a2/0x12d0 [ 13.929310][ T1] ima_file_check+0x66/0x90 [ 13.929330][ T1] security_file_post_open+0x8e/0x210 [ 13.929345][ T1] path_openat+0x9c0/0x1eb0 [ 13.929358][ T1] do_filp_open+0x102/0x1f0 [ 13.929372][ T1] do_sys_openat2+0xc1/0x140 [ 13.929391][ T1] __x64_sys_openat+0xb2/0x100 [ 13.929412][ T1] do_syscall_64+0xa4/0xfa0 [ 13.929432][ T1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.289664][ T5148] mount (5148) used greatest stack depth: 12432 bytes = left [ 14.338066][ T5149] Oops: general protection fault, probably for non-can= onical address 0x8c9f1f3bd28c4867: 0000 [#1] SMP PTI [ 14.349450][ T5149] CPU: 1 UID: 0 PID: 5149 Comm: init Not tainted syzka= ller #0 PREEMPT(full)=20 [ 14.358203][ T5149] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 10/25/2025 [ 14.368256][ T5149] RIP: 0010:__kmalloc_cache_noprof+0x422/0x5b0 [ 14.374496][ T5149] Code: c1 e9 3a 48 0f a3 48 08 0f 83 4f 01 00 00 48 8= 5 ff 0f 84 5c fe ff ff 41 ba ff ff ff ff 41 8b 44 24 30 49 8b 34 24 48 8d 4= a 08 <48> 8b 1c 07 48 89 f8 65 48 0f c7 0e 0f 85 f7 fd ff ff 41 8b 44 24 [ 14.394091][ T5149] RSP: 0018:ffffc90002257cd0 EFLAGS: 00010246 [ 14.400158][ T5149] RAX: 0000000000000020 RBX: ffffea0004263780 RCX: 000= 000000001ac01 [ 14.408215][ T5149] RDX: 000000000001abf9 RSI: ffffffff8946da20 RDI: 8c9= f1f3bd28c4847 [ 14.416264][ T5149] RBP: ffffc90002257d30 R08: 0000000000000040 R09: 000= 0000000000000 [ 14.424232][ T5149] R10: 00000000ffffffff R11: 00322e6f732e3436 R12: fff= f888100041700 [ 14.432333][ T5149] R13: 0000000000000c00 R14: 0000000000000040 R15: 000= 0000000000cc0 [ 14.440345][ T5149] FS: 00007f697b0b0c80(0000) GS:ffff8881b26c2000(0000= ) knlGS:0000000000000000 [ 14.449272][ T5149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.455856][ T5149] CR2: 00007f697b11aa10 CR3: 0000000109c5e000 CR4: 000= 00000003526f0 [ 14.463913][ T5149] Call Trace: [ 14.467185][ T5149] [ 14.470105][ T5149] ? load_elf_binary+0x2fc/0x27a0 [ 14.475121][ T5149] ? load_elf_binary+0x2fc/0x27a0 [ 14.480147][ T5149] load_elf_binary+0x2fc/0x27a0 [ 14.484985][ T5149] ? load_misc_binary+0x3b5/0x600 [ 14.489996][ T5149] bprm_execve+0x3f7/0x830 [ 14.494403][ T5149] do_execveat_common.isra.0+0x262/0x2e0 [ 14.500026][ T5149] __x64_sys_execve+0x3d/0x50 [ 14.504778][ T5149] do_syscall_64+0xa4/0xfa0 [ 14.509377][ T5149] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.515266][ T5149] RIP: 0033:0x7f697b24b107 [ 14.519691][ T5149] Code: 0f 00 64 c7 00 07 00 00 00 b8 ff ff ff ff c9 c= 3 0f 1f 00 48 8b 05 a9 ee 0f 00 48 8b 10 e9 01 00 00 00 90 b8 3b 00 00 00 0= f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 ec 0f 00 f7 d8 64 89 01 48 [ 14.539376][ T5149] RSP: 002b:00007ffef00e3208 EFLAGS: 00000202 ORIG_RAX= : 000000000000003b [ 14.547775][ T5149] RAX: ffffffffffffffda RBX: 00007ffef00e3310 RCX: 000= 07f697b24b107 [ 14.555732][ T5149] RDX: 0000562c23324480 RSI: 00007ffef00e3280 RDI: 000= 07ffef00e3310 [ 14.563778][ T5149] RBP: 00007ffef00e3270 R08: 0000000000000000 R09: 000= 0000000000001 [ 14.571747][ T5149] R10: 0000000000000000 R11: 0000000000000202 R12: 000= 07ffef00e3280 [ 14.579709][ T5149] R13: 0000562c23324480 R14: 0000000000000001 R15: 000= 0000000000001 [ 14.587668][ T5149] [ 14.590674][ T5149] Modules linked in: [ 14.594597][ T5149] ---[ end trace 0000000000000000 ]--- [ 14.600083][ T5149] RIP: 0010:__kmalloc_cache_noprof+0x422/0x5b0 [ 14.606318][ T5149] Code: c1 e9 3a 48 0f a3 48 08 0f 83 4f 01 00 00 48 8= 5 ff 0f 84 5c fe ff ff 41 ba ff ff ff ff 41 8b 44 24 30 49 8b 34 24 48 8d 4= a 08 <48> 8b 1c 07 48 89 f8 65 48 0f c7 0e 0f 85 f7 fd ff ff 41 8b 44 24 [ 14.625968][ T5149] RSP: 0018:ffffc90002257cd0 EFLAGS: 00010246 [ 14.632056][ T5149] RAX: 0000000000000020 RBX: ffffea0004263780 RCX: 000= 000000001ac01 [ 14.640024][ T5149] RDX: 000000000001abf9 RSI: ffffffff8946da20 RDI: 8c9= f1f3bd28c4847 [ 14.648028][ T5149] RBP: ffffc90002257d30 R08: 0000000000000040 R09: 000= 0000000000000 [ 14.656008][ T5149] R10: 00000000ffffffff R11: 00322e6f732e3436 R12: fff= f888100041700 [ 14.663982][ T5149] R13: 0000000000000c00 R14: 0000000000000040 R15: 000= 0000000000cc0 [ 14.672296][ T5149] FS: 00007f697b0b0c80(0000) GS:ffff8881b25c2000(0000= ) knlGS:0000000000000000 [ 14.681247][ T5149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 14.687849][ T5149] CR2: 00007f022521ae9c CR3: 0000000109c5e000 CR4: 000= 00000003526f0 [ 14.695952][ T5149] Kernel panic - not syncing: Fatal exception [ 14.702417][ T5149] Kernel Offset: disabled [ 14.706729][ T5149] Rebooting in 86400 seconds.. syzkaller build log: go env (err=3D) AR=3D'ar' CC=3D'gcc' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_ENABLED=3D'1' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' CXX=3D'g++' GCCGO=3D'gccgo' GO111MODULE=3D'auto' GOAMD64=3D'v1' GOARCH=3D'amd64' GOAUTH=3D'netrc' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOCACHEPROG=3D'' GODEBUG=3D'' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFIPS140=3D'off' GOFLAGS=3D'' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build2273466794=3D/tmp/go-build -gno-record-gc= c-switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.= mod' GOMODCACHE=3D'/syzkaller/jobs-2/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs-2/linux/gopath' GOPRIVATE=3D'' GOPROXY=3D'https://proxy.golang.org,direct' GOROOT=3D'/usr/local/go' GOSUMDB=3D'sum.golang.org' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.24.4' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 4e1406b4def 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/contribut= ing.md#using-syz-env go list -f '{{.Stale}}' -ldflags=3D"-s -w -X github.com/google/syzkaller/pr= og.GitRevision=3D4e1406b4defac0e2a9d9424c70706f79a7750cf3 -X github.com/goo= gle/syzkaller/prog.gitRevisionDate=3D20251106-151142" ./sys/syz-sysgen | g= rep -q false || go install -ldflags=3D"-s -w -X github.com/google/syzkaller= /prog.GitRevision=3D4e1406b4defac0e2a9d9424c70706f79a7750cf3 -X github.com/= google/syzkaller/prog.gitRevisionDate=3D20251106-151142" ./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/contribut= ing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=3Dlinux GOARCH=3Damd64 go build -ldflags=3D"-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D4e1406b4defac0e2a9d9424c70706f79a7750cf3 -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20251106-151142" -o ./bi= n/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 -Wfr= ame-larger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-forma= t-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -= static-pie -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH= _amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"4e1406b4defac0e2a9d9424c70706f79a7= 750cf3\" /usr/bin/ld: /tmp/cc4VJZ8z.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or 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=3D16b8c212580000 Tested on: commit: 9b9e4370 Merge tag 'slab-for-6.18-rc6' of git://git.ke.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=3Dcb128cd5cb43980= 9 dashboard link: https://syzkaller.appspot.com/bug?extid=3Dad45f827c88778ff7= df6 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils= for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D132cb5325800= 00