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AGHT+IH9W21i1lf1LPmBXfLyUlPi/x4oZv22z/b9mfxCvBkRAicllB6O2cpJ6DFG7C2utnNZCFFnjFAEFZvvprI0igM= X-Received: by 2002:a05:622a:348:b0:498:e884:7ca9 with SMTP id d75a77b69052e-4a6f0717bcdmr11509161cf.13.1749564164409; Tue, 10 Jun 2025 07:02:44 -0700 (PDT) MIME-Version: 1.0 References: <20250604231151.799834-7-surenb@google.com> <202506101503.903c6ffa-lkp@intel.com> In-Reply-To: <202506101503.903c6ffa-lkp@intel.com> From: Suren Baghdasaryan Date: Tue, 10 Jun 2025 07:02:28 -0700 X-Gm-Features: AX0GCFsjl4D8Uc5rVjy3-RnObOmTy76OWHF5IchL3CLBhnl5Vrn-JPvaGcHt4lA Message-ID: Subject: Re: [PATCH v4 6/7] mm/maps: read proc/pid/maps under per-vma lock To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, david@redhat.com, vbabka@suse.cz, peterx@redhat.com, jannh@google.com, hannes@cmpxchg.org, mhocko@kernel.org, paulmck@kernel.org, shuah@kernel.org, adobriyan@gmail.com, brauner@kernel.org, josef@toxicpanda.com, yebin10@huawei.com, linux@weissschuh.net, willy@infradead.org, osalvador@suse.de, andrii@kernel.org, ryan.roberts@arm.com, christophe.leroy@csgroup.eu, tjmercier@google.com, kaleshsingh@google.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Stat-Signature: hxbrzm1y7qhy1agq56opdpojsmu3yxq7 X-Rspamd-Queue-Id: F09E6180007 X-Rspamd-Server: rspam11 X-HE-Tag: 1749564165-619404 X-HE-Meta: U2FsdGVkX18beneITU1fjB+XUDEt7n2gnzOfyo0lf5uMSzFWW7RYjg7WVnwhXHe9lR0zZ/5ivjWsock3nfXA5LJ3sNrc51sD09F6u47RxAmieBFxRulPli37pWhkTq2pgBMwIDeFTVeLL4WJZh0LSEGkqxfw7od/XVQSe9sJDuDZzE7K31qAMk1XVLhNz9nJRdZWKqr5HAt4aB5aWy7g5MOnABl42M0dnzdTHjosvMYMfmq/61E3qop/oU+Jj4PN+VbQAhFypTVDj4GUAKbNt6U0yIqw+YlZo+rHIewLylcUY4I+3UYdvXdqkUb4x2ILkWC6Asb9sN5RCv3Cef1NgVjU/xlZfLXuOSr5ChX8EkW/ywq+UtyX3lz+o6dn8vb9xoH0SSNlw6q+2h3gesPFROa94abCCF/lfevNpnTHrF5vkE3ysL10bIXHpaFlR/wKApCQL2jHNoH87kWQcM2hS9RAhXANTcTMjUyR74SJz6YjYqJdY/GqmMg7zMlC/XKnjhA+QQF/5A+vCf2ec0ogUAbO2ddUQqBbJKac/BX6h0W5B/vKka8I2EL0F6sqtEUa0vfwEwuShlw+r7iQuypQF8BXM9MiApZfhUfplWqOphcKlycozwIDiG9Udyr7TQpIWgWZHOy/p4xGyg1c01cI2wginNFMcfAPw35nhHkA27t+qVC9CcjSGxxduwS+LznGRe0zjWFSqifWfRD0nF8fDXFPS02RTBiq7cPjeJ6pvVUzlYjCH8MRiLDkoh1GUzHXG/aGnMZdlz67KSxIZoM+6Tn5lPB7gocfU0obSKAlXOKfE0YLF3bUozVZy00iP/vSyYHYUhwzc9TuRsTCbksN8l2cwizjxywPIHgu+6dG6+a0WrkEO/cSxDtvqjova9lUAmFb1gtsJiYmj+kq86e/XboOsEtnxz68XITPIiTDVLLMQrk2neE6QndRN7Egntf5w+PZTI9WcSiLVXVXvaa iKjW2kdq EJBtzFOlx/s9fWXi9B4YRM3Zw6YjCw8HMx5fVU5Z+GtEc+G+2rItK5Ql5oVVLw0xubjJ7aE/T9stdielwhedVezZI2+AOysXuXNO6RyKus3aa/rNpXdMusi5kryemhUtlNqRmeIA65yPRCbeCd1ZwEefEx3Hqkxm8LJWOGAthCbyEKAcfNIRlVYoC1OQkq0IIahH1yry3ys/TK7tOEKlwnR75vVBxtm1tMg8yw2KFi3o0YNUjDq2AReGhegYkE+aF0CyOLzPrU/26SrPuYIh6bza1Iv9tsCt/oIXoXQDMZvHtKiZf2QcgNJsZczVgP87AdSR+IzPZxt9RkQIJaLo0nKuK35CgbMq0FQjv X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jun 10, 2025 at 12:51=E2=80=AFAM kernel test robot wrote: > > > > Hello, > > kernel test robot noticed "WARNING:at_include/linux/rwsem.h:#anon_vma_nam= e" on: > > commit: 5c3ce17006c6188d249bc07bfa639f2d76bbd8ac ("[PATCH v4 6/7] mm/maps= : read proc/pid/maps under per-vma lock") > url: https://github.com/intel-lab-lkp/linux/commits/Suren-Baghdasaryan/se= lftests-proc-add-proc-pid-maps-tearing-from-vma-split-test/20250605-071433 > patch link: https://lore.kernel.org/all/20250604231151.799834-7-surenb@go= ogle.com/ > patch subject: [PATCH v4 6/7] mm/maps: read proc/pid/maps under per-vma l= ock Ah, I'll need to change anon_vma_name() to allow for only VMA to be locked instead of doing mmap_assert_locked(). > > in testcase: locktorture > version: > with following parameters: > > runtime: 300s > test: cpuhotplug > > > > config: x86_64-randconfig-005-20250606 > compiler: clang-20 > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 1= 6G > > (please refer to attached dmesg/kmsg for entire log/backtrace) > > > +------------------------------------------------------------------------= -------+------------+------------+ > | = | fa0f347301 | 5c3ce17006 | > +------------------------------------------------------------------------= -------+------------+------------+ > | WARNING:at_include/linux/rwsem.h:#anon_vma_name = | 0 | 10 | > | RIP:anon_vma_name = | 0 | 10 | > +------------------------------------------------------------------------= -------+------------+------------+ > > > If you fix the issue in a separate patch/commit (i.e. not just a new vers= ion of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-lkp/202506101503.903c6ffa-lkp@intel.= com > > > [ 41.709983][ T353] ------------[ cut here ]------------ > [ 41.710541][ T353] WARNING: CPU: 1 PID: 353 at include/linux/rwsem.h:195= anon_vma_name (include/linux/rwsem.h:195) > [ 41.711251][ T353] Modules linked in: > [ 41.711616][ T353] CPU: 1 UID: 0 PID: 353 Comm: grep Tainted: G = T 6.15.0-11198-g5c3ce17006c6 #1 PREEMPT ce6b47a049c5ee6720891b= d644c96f2c3c349eba > [ 41.712738][ T353] Tainted: [T]=3DRANDSTRUCT > [ 41.713101][ T353] Hardware name: QEMU Standard PC (i440FX + PIIX, 19= 96), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > [ 41.713902][ T353] RIP: 0010:anon_vma_name (include/linux/rwsem.h:195) > [ 41.714327][ T353] Code: 74 28 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c= 38 00 74 08 48 89 df e8 ac 4b 02 00 48 8b 03 5b 41 5e 41 5f c3 cc cc cc cc= cc <0f> 0b eb d4 48 c7 c1 74 46 b4 89 80 e1 07 80 c1 03 38 c1 7c 87 48 > All code > =3D=3D=3D=3D=3D=3D=3D=3D > 0: 74 28 je 0x2a > 2: 48 83 c3 40 add $0x40,%rbx > 6: 48 89 d8 mov %rbx,%rax > 9: 48 c1 e8 03 shr $0x3,%rax > d: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) > 12: 74 08 je 0x1c > 14: 48 89 df mov %rbx,%rdi > 17: e8 ac 4b 02 00 call 0x24bc8 > 1c: 48 8b 03 mov (%rbx),%rax > 1f: 5b pop %rbx > 20: 41 5e pop %r14 > 22: 41 5f pop %r15 > 24: c3 ret > 25: cc int3 > 26: cc int3 > 27: cc int3 > 28: cc int3 > 29: cc int3 > 2a:* 0f 0b ud2 <-- trapping instruction > 2c: eb d4 jmp 0x2 > 2e: 48 c7 c1 74 46 b4 89 mov $0xffffffff89b44674,%rcx > 35: 80 e1 07 and $0x7,%cl > 38: 80 c1 03 add $0x3,%cl > 3b: 38 c1 cmp %al,%cl > 3d: 7c 87 jl 0xffffffffffffffc6 > 3f: 48 rex.W > > Code starting with the faulting instruction > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > 0: 0f 0b ud2 > 2: eb d4 jmp 0xffffffffffffffd8 > 4: 48 c7 c1 74 46 b4 89 mov $0xffffffff89b44674,%rcx > b: 80 e1 07 and $0x7,%cl > e: 80 c1 03 add $0x3,%cl > 11: 38 c1 cmp %al,%cl > 13: 7c 87 jl 0xffffffffffffff9c > 15: 48 rex.W > [ 41.715798][ T353] RSP: 0018:ffffc90002dcf9d8 EFLAGS: 00010246 > [ 41.716286][ T353] RAX: 0000000000000000 RBX: ffff888135319c40 RCX: f= fffc90002dcfa78 > [ 41.716889][ T353] RDX: ffffc90002dcfa70 RSI: ffff88816ea2bc30 RDI: f= fff88816d7485a8 > [ 41.717509][ T353] RBP: ffffc90002dcfa80 R08: 0000000000000000 R09: 0= 000000000000002 > [ 41.718117][ T353] R10: 0000000000000000 R11: ffffffff81ebd610 R12: d= ffffc0000000000 > [ 41.718710][ T353] R13: ffff888135319d10 R14: ffff888135319d10 R15: d= ffffc0000000000 > [ 41.719318][ T353] FS: 00007f17e7a81740(0000) GS:ffff88842312b000(00= 00) knlGS:0000000000000000 > [ 41.719998][ T353] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 41.720503][ T353] CR2: 000055c5de49dc78 CR3: 0000000135bcc000 CR4: 0= 0000000000406b0 > [ 41.721114][ T353] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0= 000000000000000 > [ 41.721717][ T353] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0= 000000000000400 > [ 41.722373][ T353] Call Trace: > [ 41.722640][ T353] > [ 41.722881][ T353] get_vma_name (fs/proc/task_mmu.c:?) > [ 41.723253][ T353] show_map_vma (fs/proc/task_mmu.c:509) > [ 41.723617][ T353] show_map (fs/proc/task_mmu.c:525) > [ 41.723922][ T353] seq_read_iter (fs/seq_file.c:231) > [ 41.724311][ T353] seq_read (fs/seq_file.c:162) > [ 41.724653][ T353] vfs_read (fs/read_write.c:570) > [ 41.724981][ T353] ? do_syscall_64 (arch/x86/entry/syscall_64.c:113) > [ 41.725384][ T353] ksys_read (fs/read_write.c:715) > [ 41.725703][ T353] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entr= y_64.S:130) > [ 41.726174][ T353] do_syscall_64 (arch/x86/entry/syscall_64.c:?) > [ 41.726538][ T353] ? find_held_lock (kernel/locking/lockdep.c:5353) > [ 41.726900][ T353] ? exc_page_fault (arch/x86/include/asm/irqflags.h:26 = arch/x86/include/asm/irqflags.h:109 arch/x86/include/asm/irqflags.h:151 arc= h/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) > [ 41.727288][ T353] ? do_user_addr_fault (arch/x86/include/asm/atomic.h:9= 3 include/linux/atomic/atomic-arch-fallback.h:949 include/linux/atomic/atom= ic-instrumented.h:401 include/linux/refcount.h:389 include/linux/refcount.h= :432 include/linux/mmap_lock.h:142 include/linux/mmap_lock.h:237 arch/x86/m= m/fault.c:1338) > [ 41.727706][ T353] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep= .c:473) > [ 41.728190][ T353] ? exc_page_fault (arch/x86/mm/fault.c:1536) > [ 41.728590][ T353] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_= 64.S:130) > [ 41.729073][ T353] RIP: 0033:0x7f17e7b7c19d > [ 41.729432][ T353] Code: 31 c0 e9 c6 fe ff ff 50 48 8d 3d 66 54 0a 00 e8= 49 ff 01 00 66 0f 1f 84 00 00 00 00 00 80 3d 41 24 0e 00 00 74 17 31 c0 0f= 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec > All code > =3D=3D=3D=3D=3D=3D=3D=3D > 0: 31 c0 xor %eax,%eax > 2: e9 c6 fe ff ff jmp 0xfffffffffffffecd > 7: 50 push %rax > 8: 48 8d 3d 66 54 0a 00 lea 0xa5466(%rip),%rdi # 0xa547= 5 > f: e8 49 ff 01 00 call 0x1ff5d > 14: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) > 1b: 00 00 > 1d: 80 3d 41 24 0e 00 00 cmpb $0x0,0xe2441(%rip) # 0xe246= 5 > 24: 74 17 je 0x3d > 26: 31 c0 xor %eax,%eax > 28: 0f 05 syscall > 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <= -- trapping instruction > 30: 77 5b ja 0x8d > 32: c3 ret > 33: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) > 3a: 00 00 00 > 3d: 48 rex.W > 3e: 83 .byte 0x83 > 3f: ec in (%dx),%al > > Code starting with the faulting instruction > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax > 6: 77 5b ja 0x63 > 8: c3 ret > 9: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) > 10: 00 00 00 > 13: 48 rex.W > 14: 83 .byte 0x83 > 15: ec in (%dx),%al > [ 41.730862][ T353] RSP: 002b:00007fffc13c12e8 EFLAGS: 00000246 ORIG_R= AX: 0000000000000000 > [ 41.731448][ T353] RAX: ffffffffffffffda RBX: 00007fffc13c138c RCX: 0= 0007f17e7b7c19d > [ 41.732038][ T353] RDX: 0000000000002000 RSI: 00007f17e7a20000 RDI: 0= 000000000000003 > [ 41.732635][ T353] RBP: 00007fffc13c1390 R08: 00000000ffffffff R09: 0= 000000000000000 > [ 41.733252][ T353] R10: 0000000000000022 R11: 0000000000000246 R12: 0= 000000000000003 > [ 41.733850][ T353] R13: 0000000000001000 R14: 000055c5de485951 R15: 0= 000000000002000 > [ 41.734481][ T353] > [ 41.734719][ T353] irq event stamp: 3793 > [ 41.735058][ T353] hardirqs last enabled at (3805): __console_unlock (ar= ch/x86/include/asm/irqflags.h:26 arch/x86/include/asm/irqflags.h:109 arch/x= 86/include/asm/irqflags.h:151 kernel/printk/printk.c:344 kernel/printk/prin= tk.c:2885) > [ 41.735754][ T353] hardirqs last disabled at (3814): __console_unlock (k= ernel/printk/printk.c:342) > [ 41.736478][ T353] softirqs last enabled at (3488): handle_softirqs (arc= h/x86/include/asm/preempt.h:27 kernel/softirq.c:426 kernel/softirq.c:607) > [ 41.737219][ T353] softirqs last disabled at (3835): __irq_exit_rcu (arc= h/x86/include/asm/atomic.h:23) > [ 41.737925][ T353] ---[ end trace 0000000000000000 ]--- > > > The kernel config and materials to reproduce are available at: > https://download.01.org/0day-ci/archive/20250610/202506101503.903c6ffa-lk= p@intel.com > > > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki >