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Mon, 19 Aug 2024 02:10:28 -0700 (PDT) Date: Mon, 19 Aug 2024 02:10:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001d12d4062005aea1@google.com> Subject: [syzbot] [mm?] INFO: rcu detected stall in do_vmi_munmap (2) From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 587298000D X-Stat-Signature: xh5ku14wz6ru9bgybxhq4xrq51x5j41x X-Rspam-User: X-HE-Tag: 1724058629-245548 X-HE-Meta: U2FsdGVkX1/giApYGjbYScuaXsy61qChGM0/BbpfUFXDJFm220HbzGN8HQzATpQZBrksF21EUCiz+plI7sMw44pWUZDbhVEhAB1OYu2mEtXzlLohajGWSa6KmTrW559NN70h7vbj7YnOjpPWA8yGGBOJkyjIoIv0SOb0qU1b4YMiaPwF4AWJsaHIlHP/NOVKc8deOc+f/kiqHkkTD5DUIgfw+lzCiebcdKsJ4ej0SDg6uckqRqb0U6Xy0cDYbE8OBNJxbfIifEhs8Zdy5WYAZYOZLMZNvP+dBe4+QtarneFfg/bBwJ+aMwWN+jwgy0ZIgjyBepO6wv4fW8aGrdVcac9tD8Ag04pgpP/iycuH3TsON2cTfxxQ7sqozvfiqoOJ71TwcTstZirxfD2+7fpl61wmlyeqbtZdfS/iDubOCRGc0i9Rdxm9ehBhnz3yPROP7SnLpIU0nfWDQBfuHeb5O2BWWGR9HdNeEHszHIo/HMci2r4788gjXFuqF3rNM/Rr+lwNZLAptwQZ6wBsiSBvVNCd9iG3meOdZNGm7tKzkMEeD5xmRs+Z2JIBeyW5o8Gbkh2EV0O8UBvmdj16VUaHXGe9rPlFXMdV8Mct+3g6GwggtQSFM+LMdayhLYjXZT0bWJAscPz/qtR4xv9QBCGdWp/6uw5wKvCThPOlRM55OgNRkS+3R+aJuSHP342cMkpqCNqWIKmyqyggIohIvOJq5bWFMx+S66aa+/ysr7+UYX+qLngMflDtvznMg99G2VVnYOY772Zc2/wd1Qjh1wx/Gh4pQd/rYx6Ye6wGLR0I1RR+zokEZ4Ub2B7eHUumpZjweFf3cgHhyMulxEk5UMfGJzyVzCUjS4q12xZjXEeAylZWs/0w0yegZKDhIzbUB1OyBYOSB4M/3fqi1Vh8xQSmdZFrW+igVtT3ZcSOeMSL/tIQ8n2uiUlXK+JVKn8p3tnIAmdNM4PAzKKbN8H1tge /6SpV9fT 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 nsaxjXGx jzo9f6fogELB50Rd9Q77gHr/t6GHfxRWvqxDKbwbgD+H6dwzftHFWNjdiVfValU7mfaFzcqdcCEcT+eM4k9ltA7/I5mXgWX10ostsWs0rjLeHiTj/8tjZvWxPIevx8GU7thnXLt/5ax6wIxZBNMe0UsEX7GmNr3eUfncaLsYi5LsXjoFm1I9UDLYWmfGMJUds1Rl+sM+y7RjOaB+tkoXZEXEa4lzyjIwdY68BtCLD9fO9IiHoP+g5jWco5FiGC/BwQipupnOESBEerXRjbNZJam1f0w2L1oJyCiIEKDfRQ8g2ZQTmWPIBlzksmCRdxqlXQemQlW+3SUyALVcB4xD6Uyi3QnQykDdo2NeHJ/NVKuGwrUDkl8UYPggcwPMVund 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: Hello, syzbot found the following issue on: HEAD commit: e5fa841af679 Merge tag 'pull-fixes' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14f87d83980000 kernel config: https://syzkaller.appspot.com/x/.config?x=92c0312151c4e32e dashboard link: https://syzkaller.appspot.com/bug?extid=036af2f0c7338a33b0cd compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ff935f32a733/disk-e5fa841a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0ae3bccf47f7/vmlinux-e5fa841a.xz kernel image: https://storage.googleapis.com/syzbot-assets/5a480809c9ec/bzImage-e5fa841a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+036af2f0c7338a33b0cd@syzkaller.appspotmail.com rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17446/1:b..l rcu: (detected by 1, t=10502 jiffies, g=99157, q=379 ncpus=2) task:modprobe state:R running task stack:24784 pid:17446 tgid:17446 ppid:7127 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:193 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:216 Code: 00 d7 03 00 65 8b 15 90 4c 70 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc RSP: 0018:ffffc9001789f2b8 EFLAGS: 00000246 RAX: ffffffff8ba3ad11 RBX: 0000000000000001 RCX: ffff88806d760000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000004 RBP: ffffc9001789f4b0 R08: ffffffff8ba3ad02 R09: ffffffff8ba3ac4c R10: 0000000000000003 R11: ffff88806d760000 R12: ffffc9001789f428 R13: 0000000000000001 R14: ffff888063baba00 R15: ffff888063baba08 mas_data_end lib/maple_tree.c:1453 [inline] mt_validate+0x511/0x4aa0 lib/maple_tree.c:7583 validate_mm+0xe7/0x530 mm/mmap.c:329 __split_vma+0xa69/0xc30 mm/mmap.c:2511 do_vmi_align_munmap+0x388/0x18c0 mm/mmap.c:2663 do_vmi_munmap+0x261/0x2f0 mm/mmap.c:2830 mmap_region+0x72f/0x2090 mm/mmap.c:2881 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f176367bb74 RSP: 002b:00007ffec4ffdad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007ffec4ffdb18 RCX: 00007f176367bb74 RDX: 0000000000000005 RSI: 0000000000123000 RDI: 00007f176340b000 RBP: 00007ffec4ffe270 R08: 0000000000000000 R09: 0000000000028000 R10: 0000000000000812 R11: 0000000000000246 R12: 00007f17636575c0 R13: 00007ffec4ffe2f8 R14: 0000000000027f38 R15: 0000000000000000 rcu: rcu_preempt kthread starved for 10447 jiffies! g99157 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:26448 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.11.0-rc3-syzkaller-00279-ge5fa841af679 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline] RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 00 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 95 07 9b 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246 RAX: ffff888017af0000 RBX: ffff88801b6ee064 RCX: 0000000007bf5161 RDX: 0000000000000001 RSI: ffff88801b6ee000 RDI: ffff88801b6ee064 RBP: 000000000003a678 R08: ffff8880b9337c7b R09: 1ffff11017266f8f R10: dffffc0000000000 R11: ffffffff8bae3ce0 R12: ffff88801836f800 R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eecad60 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f45db1b035b CR3: 00000000634fc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:326 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup