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Mon, 19 Jan 2026 10:03:13 -0800 (PST) Received: from [192.168.1.105] ([165.50.93.232]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4801e9b4b0dsm85296395e9.1.2026.01.19.10.03.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Jan 2026 10:03:13 -0800 (PST) Message-ID: <4e65ea7b-79aa-4c36-a8ea-0ca84966d089@gmail.com> Date: Mon, 19 Jan 2026 20:03:05 +0100 Precedence: bulk X-Mailing-List: linux-kernel-mentees@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] fs/hfs: fix s_fs_info leak on setup_bdev_super() failure To: Viacheslav Dubeyko , "brauner@kernel.org" Cc: "jack@suse.cz" , "khalid@kernel.org" , "frank.li@vivo.com" , "linux-fsdevel@vger.kernel.org" , "slava@dubeyko.com" , "david.hunter.linux@gmail.com" , "linux-kernel@vger.kernel.org" , "linux-kernel-mentees@lists.linuxfoundation.org" , "skhan@linuxfoundation.org" , "glaubitz@physik.fu-berlin.de" , "syzbot+ad45f827c88778ff7df6@syzkaller.appspotmail.com" , "viro@zeniv.linux.org.uk" References: <20251119073845.18578-1-mehdi.benhadjkhelifa@gmail.com> <20251126-gebaggert-anpacken-d0d9fb10b9bc@brauner> <04d3810e-3d1b-4af2-a39b-0459cb466838@gmail.com> <56521c02f410d15a11076ebba1ce00e081951c3f.camel@ibm.com> <20251127-semmel-lastkraftwagen-9f2c7f6e16dd@brauner> <4bb136bae5c04bc07e75ddf108ada7e7480afacc.camel@ibm.com> <59b833d7-4a97-4703-86ef-c163d70b3836@gmail.com> <9061911554697106be2703189f02e5765f3df229.camel@ibm.com> <7d38a29d-9d81-42e0-99c1-b6a09afe61fd@gmail.com> <8a96ddbefd84ed0917afc13f91ee0f33ea2e0c10.camel@ibm.com> Content-Language: en-US From: Mehdi Ben Hadj Khelifa In-Reply-To: <8a96ddbefd84ed0917afc13f91ee0f33ea2e0c10.camel@ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/19/26 6:48 PM, Viacheslav Dubeyko wrote: > On Sat, 2026-01-17 at 19:51 +0100, Mehdi Ben Hadj Khelifa wrote: >> On 12/1/25 8:24 PM, Viacheslav Dubeyko wrote: >>> On Sat, 2025-11-29 at 13:48 +0100, Mehdi Ben Hadj Khelifa wrote: >>>> On 11/27/25 9:19 PM, Viacheslav Dubeyko wrote: >>>>> >>> >>> >>> >>>>> >>>>> As far as I can see, the situation is improving with the patches. I can say that >>>>> patches have been tested and I am ready to pick up the patches into HFS/HFS+ >>>>> tree. >>>>> >>>>> Mehdi, should I expect the formal patches from you? Or should I take the patches >>>>> as it is? >>>>> >>>> >>>> I can send them from my part. Should I add signed-off-by tag at the end >>>> appended to them? >>>> >>> >>> If you are OK with the current commit message, then I can simply add your >>> signed-off-by tag on my side. If you would like to polish the commit message >>> somehow, then I can wait the patches from you. So, what is your decision? >>> >>>> >>>> Also, I want to give an apologies for the delayed/none reply about the >>>> crash of xfstests on my part. I went back testing them 3 days earlier >>>> and they started showing different results again and then I have broken >>>> my finger....Which caused me to have much slower progress.I'm still >>>> working on getting the same crashes as I did before where I get them >>>> when running any test.Because I ran quick tests and they didn't crash. >>>> only with auto around the 631 test for desktop and around 642 on my >>>> laptop for both not patched and patched kernels.I'm going to update you >>>> on that matter when I can have predictable behavior and cause of the >>>> crash/call stack.But expect slow progress from my part here for the >>>> reason I mentionned before. >>>> >>> >>> No problem. Take your time. >>> >> Continuing on this. I have run xfstests today on the base 6.18-rc7 >> unmodified kernel ( I will do it again for latest release) and captured >> the crash. >> The following is the decoded crash report: >> [ 1572.093549] [T1127273] Oops: general protection fault, maybe for >> address 0xffffcaa2c1da364c: 0000 [#1] SMP NOPTI >> [ 1572.093555] [T1127273] Tainted: [S]=CPU_OUT_OF_SPEC, [O]=OOT_MODULE, >> [E]=UNSIGNED_MODULE >> [ 1572.093556] [T1127273] Hardware name: Gigabyte Technology Co., Ltd. >> B760 DS3H/B760 DS3H, BIOS F12 02/25/2025 >> [ 1572.093557] [T1127273] RIP: 0010:memcpy (arch/x86/lib/memcpy_64.S:38) >> [ 1572.093560] [T1127273] Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 >> 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 48 >> 89 f8 48 89 d1 a4 c3 cc cc cc cc 66 90 66 66 2e 0f 1f 84 00 00 00 >> 00 00 90 90 >> All code >> ======== >> 0: 2e 0f 1f 84 00 00 00 cs nopl 0x0(%rax,%rax,1) >> 7: 00 00 >> 9: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) >> e: 90 nop >> f: 90 nop >> 10: 90 nop >> 11: 90 nop >> 12: 90 nop >> 13: 90 nop >> 14: 90 nop >> 15: 90 nop >> 16: 90 nop >> 17: 90 nop >> 18: 90 nop >> 19: 90 nop >> 1a: 90 nop >> 1b: 90 nop >> 1c: 90 nop >> 1d: 90 nop >> 1e: f3 0f 1e fa endbr64 >> 22: 66 90 xchg %ax,%ax >> 24: 48 89 f8 mov %rdi,%rax >> 27: 48 89 d1 mov %rdx,%rcx >> 2a:* f3 a4 rep movsb (%rsi),(%rdi) <-- trapping >> instruction >> 2c: c3 ret >> 2d: cc int3 >> 2e: cc int3 >> 2f: cc int3 >> 30: cc int3 >> 31: 66 90 xchg %ax,%ax >> 33: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) >> 3a: 00 00 00 00 >> 3e: 90 nop >> 3f: 90 nop >> >> Code starting with the faulting instruction >> =========================================== >> 0: f3 a4 rep movsb (%rsi),(%rdi) >> 2: c3 ret >> 3: cc int3 >> 4: cc int3 >> 5: cc int3 >> 6: cc int3 >> 7: 66 90 xchg %ax,%ax >> 9: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) >> 10: 00 00 00 00 >> 14: 90 nop >> 15: 90 nop >> [ 1572.093561] [T1127273] RSP: 0018:ffffcaa2c1da3610 EFLAGS: 00010206 >> [ 1572.093563] [T1127273] RAX: ffffcaa2c1da364c RBX: 0000000000000004 >> RCX: 0000000000000004 >> [ 1572.093564] [T1127273] RDX: 0000000000000004 RSI: 0ddc8fa7cb9c9ff6 >> RDI: ffffcaa2c1da364c >> [ 1572.093565] [T1127273] RBP: 0000000000000004 R08: 0000000000002000 >> R09: ffff89e0966c8118 >> [ 1572.093566] [T1127273] R10: 0000000000000009 R11: 000000000000000a >> R12: ffffcaa2c1da364c >> [ 1572.093566] [T1127273] R13: ffff89e085beee98 R14: 0000000000000004 >> R15: ffff89e085beee40 >> [ 1572.093567] [T1127273] FS: 00007f9b755ddc40(0000) >> GS:ffff89e8af90e000(0000) knlGS:0000000000000000 >> [ 1572.093568] [T1127273] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 1572.093569] [T1127273] CR2: 00007f0cc5b95a10 CR3: 00000003448b9001 >> CR4: 0000000000f72ef0 >> [ 1572.093570] [T1127273] PKRU: 55555554 >> [ 1572.093570] [T1127273] Call Trace: >> [ 1572.093572] [T1127273] >> Server query failed: No such file or directory >> [ 1572.093574] [T1127273] hfsplus_bnode_read (fs/hfsplus/bnode.c:49 >> fs/hfsplus/bnode.c:23) hfsplus >> [ 1572.093580] [T1127273] ? __pfx_hfs_find_rec_by_key >> (fs/hfsplus/bfind.c:86) hfsplus >> [ 1572.093584] [T1127273] hfsplus_brec_lenoff (fs/hfsplus/brec.c:27) hfsplus >> [ 1572.093588] [T1127273] __hfsplus_brec_find (fs/hfsplus/bfind.c:118) >> hfsplus >> [ 1572.093592] [T1127273] hfsplus_brec_find (fs/hfsplus/bfind.c:191) hfsplus >> [ 1572.093596] [T1127273] ? __pfx_hfs_find_rec_by_key >> (fs/hfsplus/bfind.c:86) hfsplus >> [ 1572.093599] [T1127273] hfsplus_attr_exists >> (fs/hfsplus/attributes.c:190) hfsplus >> [ 1572.093603] [T1127273] __hfsplus_setxattr (fs/hfsplus/xattr.c:340 >> (discriminator 1)) hfsplus >> [ 1572.093610] [T1127273] hfsplus_setxattr (fs/hfsplus/xattr.c:437) hfsplus >> [ 1572.093613] [T1127273] __vfs_setxattr (fs/xattr.c:200) >> [ 1572.093616] [T1127273] __vfs_setxattr_noperm (fs/xattr.c:236) >> [ 1572.093619] [T1127273] vfs_setxattr (./include/linux/fs.h:990 >> fs/xattr.c:323) >> [ 1572.093621] [T1127273] filename_setxattr (fs/xattr.c:666) >> [ 1572.093623] [T1127273] path_setxattrat (fs/xattr.c:715) >> [ 1572.093626] [T1127273] __x64_sys_lsetxattr (fs/xattr.c:750 >> (discriminator 2)) >> [ 1572.093628] [T1127273] do_syscall_64 (arch/x86/entry/syscall_64.c:63 >> (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) >> [ 1572.093630] [T1127273] ? do_syscall_64 >> (arch/x86/entry/syscall_64.c:63 (discriminator 1) >> arch/x86/entry/syscall_64.c:94 (discriminator 1)) >> [ 1572.093631] [T1127273] ? __x64_sys_lsetxattr (fs/xattr.c:750 >> (discriminator 2)) >> [ 1572.093633] [T1127273] ? do_syscall_64 >> (arch/x86/entry/syscall_64.c:63 (discriminator 1) >> arch/x86/entry/syscall_64.c:94 (discriminator 1)) >> [ 1572.093633] [T1127273] ? __irq_exit_rcu (kernel/softirq.c:688 >> (discriminator 1) kernel/softirq.c:729 (discriminator 1)) >> [ 1572.093636] [T1127273] entry_SYSCALL_64_after_hwframe >> (arch/x86/entry/entry_64.S:130) >> [ 1572.093637] [T1127273] RIP: 0033:0x7f9b7531697e >> [ 1572.093654] [T1127273] Code: 83 c4 18 48 89 d8 5b 41 5c 41 5d 41 5e >> 41 5f 5d c3 0f 1f 00 31 db eb e7 0f 1f 40 00 f3 0f 1e fa 49 89 ca b8 bd >> 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 62 13 0f 00 f7 d8 >> 64 89 01 48 >> All code >> ======== >> 0: 83 c4 18 add $0x18,%esp >> 3: 48 89 d8 mov %rbx,%rax >> 6: 5b pop %rbx >> 7: 41 5c pop %r12 >> 9: 41 5d pop %r13 >> b: 41 5e pop %r14 >> d: 41 5f pop %r15 >> f: 5d pop %rbp >> 10: c3 ret >> 11: 0f 1f 00 nopl (%rax) >> 14: 31 db xor %ebx,%ebx >> 16: eb e7 jmp 0xffffffffffffffff >> 18: 0f 1f 40 00 nopl 0x0(%rax) >> 1c: f3 0f 1e fa endbr64 >> 20: 49 89 ca mov %rcx,%r10 >> 23: b8 bd 00 00 00 mov $0xbd,%eax >> 28: 0f 05 syscall >> 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- >> trapping instruction >> 30: 73 01 jae 0x33 >> 32: c3 ret >> 33: 48 8b 0d 62 13 0f 00 mov 0xf1362(%rip),%rcx # 0xf139c >> 3a: f7 d8 neg %eax >> 3c: 64 89 01 mov %eax,%fs:(%rcx) >> 3f: 48 rex.W >> >> Code starting with the faulting instruction >> =========================================== >> 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax >> 6: 73 01 jae 0x9 >> 8: c3 ret >> 9: 48 8b 0d 62 13 0f 00 mov 0xf1362(%rip),%rcx # 0xf1372 >> 10: f7 d8 neg %eax >> 12: 64 89 01 mov %eax,%fs:(%rcx) >> 15: 48 rex.W >> [ 1572.093655] [T1127273] RSP: 002b:00007ffc251dfbd8 EFLAGS: 00000246 >> ORIG_RAX: 00000000000000bd >> [ 1572.093656] [T1127273] RAX: ffffffffffffffda RBX: 0000000000000000 >> RCX: 00007f9b7531697e >> [ 1572.093657] [T1127273] RDX: 00005617e5af5990 RSI: 00007ffc251dfd70 >> RDI: 00005617e5af9190 >> [ 1572.093657] [T1127273] RBP: 00007ffc251dfd60 R08: 0000000000000000 >> R09: 0000000000000000 >> [ 1572.093658] [T1127273] R10: 00000000000002a1 R11: 0000000000000246 >> R12: 00007ffc251dfd70 >> [ 1572.093658] [T1127273] R13: 00005617e5af5990 R14: 00000000000002a1 >> R15: 0000000000001ae7 >> [ 1572.093660] [T1127273] >> >> >> Should be noted that before the crash, dmesg shows that the generic test >> 642 is stuck repeatedly trying to "replace xattr" which is triggered in >> the __hfsplus_setxattr() function under fs/hfsplus/xattr line 354. >> relevant dmesg output: >> [ 1571.407168] [ T4294] run fstests generic/642 at 2026-01-17 14:49:36 >> [ 1571.892677] [T1127270] hfsplus: cannot replace xattr >> . >> . >> . >> [ 1572.092869] [T1127271] hfsplus: cannot replace xattr >> [ 1572.093234] [T1127270] hfsplus: cannot replace xattr >> >> >> If more information relevant to the crash or more testing is needed I >> would do my best to help.I will also provide more crash info for the >> 6.18-rc7 patched kernel and 6.19-rc4 base and patched kernel soon. > > Could you please test/check the issue reproduction on current state of > origin/for-next branch of HFS/HFS+ tree [1]? > Yes, I will do it now and get back to you later tonight. >>> >>> >> Also I wanted to check on the v3 patches current status. Do they need >> more revision or they were missed to be merged in? >>>> > > I've already applied your patchset on HFS/HFS+ tree [1]. You can see it in > origin/for-next branch. > Ah, I missed that. Thanks for the heads up! > Thanks, > Slava. > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/vdubeyko/hfs.git Best Regards, Mehdi Ben Hadj Khelifa