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In-Reply-To: <0000000000005cff41061fc63a83@google.com> From: Barry Song <21cnbao@gmail.com> Date: Fri, 16 Aug 2024 13:48:39 +0800 Message-ID: Subject: Re: [syzbot] [cgroups?] [mm?] kernel BUG in swap_cgroup_record To: syzbot Cc: akpm@linux-foundation.org, cgroups@vger.kernel.org, david@redhat.com, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, muchun.song@linux.dev, roman.gushchin@linux.dev, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com, v-songbaohua@oppo.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 3344D180007 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: kihiz4t9dhkgwzqz6q4nko5aoyg7xm4m X-HE-Tag: 1723787332-206593 X-HE-Meta: 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 CRAO9DLR 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 X1I13fdm XlRJieN68CgFbzmTpjzrNLRWIHsrcusAKmcHnOMMSLFAiW35zOg3T9BNbv6OqRDLSuLPTVBP6D93DXJxeshnJLeS7DizJnl/7DkssPlDyyXnOMEFFzyeO0UKn+BSZJwxBxgHTZyIgsADPZTQhsgFbDGyvn8/GooJptnYFTc2XwnymvtZjLQ74O/UjMMQBt/EplxxEAkhBxjifq8yHVd2860MZAau3OMw8fvRhOranVCRtDACfN9CQy6hfcTOPswdPw+ExNmPNnDNdF2bfZEZQQqhP0PUsFJpDZlkFYSPivGLAnmN7R0d8A== 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 Fri, Aug 16, 2024 at 1:28=E2=80=AFPM syzbot wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 9e6869691724 Add linux-next specific files for 20240812 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=3D14c97e8398000= 0 > kernel config: https://syzkaller.appspot.com/x/.config?x=3D61ba6f3b22ee5= 467 > dashboard link: https://syzkaller.appspot.com/bug?extid=3D4745e725b07d345= 03a64 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Deb= ian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D10cf435d980= 000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/f1b086192f50/dis= k-9e686969.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/b457920fb52e/vmlinu= x-9e686969.xz > kernel image: https://storage.googleapis.com/syzbot-assets/e63ba9cce98a/b= zImage-9e686969.xz > > The issue was bisected to: > > commit d65aea610f0a14cda5ec56a154c724584ef7da17 > Author: Barry Song > Date: Wed Aug 7 21:58:59 2024 +0000 > > mm: attempt to batch free swap entries for zap_pte_range() > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=3D1493ea9198= 0000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=3D1693ea9198= 0000 > console output: https://syzkaller.appspot.com/x/log.txt?x=3D1293ea9198000= 0 > > IMPORTANT: if you fix the issue, please add the following tag to the comm= it: > Reported-by: syzbot+4745e725b07d34503a64@syzkaller.appspotmail.com > Fixes: d65aea610f0a ("mm: attempt to batch free swap entries for zap_pte_= range()") > > ------------[ cut here ]------------ > kernel BUG at mm/swap_cgroup.c:141! thanks! this is exactly what Chris and Yosry have reported: https://lore.kernel.org/all/20240815215308.55233-1-21cnbao@gmail.com/ And this one is queued: + mm-attempt-to-batch-free-swap-entries-for-zap_pte_range-fix.patch added to mm-unstable branch https://lore.kernel.org/all/20240815221312.94782C32786@smtp.kernel.org/ > Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI > CPU: 1 UID: 0 PID: 5371 Comm: syz.0.15 Not tainted 6.11.0-rc3-next-202408= 12-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS G= oogle 06/27/2024 > RIP: 0010:swap_cgroup_record+0x2cd/0x2d0 mm/swap_cgroup.c:141 > Code: e7 e8 a7 c9 f6 ff e9 64 fe ff ff e8 cd 41 8e ff 48 c7 c7 c0 db a5 8= e 48 89 de e8 2e 8c e8 02 e9 7a fd ff ff e8 b4 41 8e ff 90 <0f> 0b 90 90 90= 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f > RSP: 0018:ffffc90003e172f8 EFLAGS: 00010093 > RAX: ffffffff82054c9c RBX: 000000000000000b RCX: ffff88802298bc00 > RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000000 > RBP: 0000000000000001 R08: ffffffff82054b43 R09: fffff520007c2e3c > R10: dffffc0000000000 R11: fffff520007c2e3c R12: ffff88801cf0f014 > R13: 0000000000000000 R14: 000000000000000a R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000= 000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f9332107a8c CR3: 000000000e734000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > __mem_cgroup_uncharge_swap+0x84/0x2e0 mm/memcontrol.c:5118 > mem_cgroup_uncharge_swap include/linux/swap.h:668 [inline] > swap_entry_range_free+0x45f/0x1120 mm/swapfile.c:1556 > __swap_entries_free mm/swapfile.c:1518 [inline] > free_swap_and_cache_nr+0xa65/0xae0 mm/swapfile.c:1876 > zap_pte_range mm/memory.c:1653 [inline] > zap_pmd_range mm/memory.c:1736 [inline] > zap_pud_range mm/memory.c:1765 [inline] > zap_p4d_range mm/memory.c:1786 [inline] > unmap_page_range+0x1924/0x42c0 mm/memory.c:1807 > unmap_vmas+0x3cc/0x5f0 mm/memory.c:1897 > exit_mmap+0x267/0xc20 mm/mmap.c:1923 > __mmput+0x115/0x390 kernel/fork.c:1347 > exit_mm+0x220/0x310 kernel/exit.c:571 > do_exit+0x9b2/0x28e0 kernel/exit.c:926 > do_group_exit+0x207/0x2c0 kernel/exit.c:1088 > __do_sys_exit_group kernel/exit.c:1099 [inline] > __se_sys_exit_group kernel/exit.c:1097 [inline] > __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097 > x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:= 232 > 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: 0033:0x7f9331f779f9 > Code: Unable to access opcode bytes at 0x7f9331f779cf. > RSP: 002b:00007fff65ce5d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9331f779f9 > RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 > RBP: 0000000000000003 R08: 00007fff65ce5dff R09: 00007f93320d0260 > R10: 0000000000000001 R11: 0000000000000246 R12: 00007f93320d0f68 > R13: 00007f93320d0260 R14: 0000000000000003 R15: 00007fff65ce5dc0 > > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:swap_cgroup_record+0x2cd/0x2d0 mm/swap_cgroup.c:141 > Code: e7 e8 a7 c9 f6 ff e9 64 fe ff ff e8 cd 41 8e ff 48 c7 c7 c0 db a5 8= e 48 89 de e8 2e 8c e8 02 e9 7a fd ff ff e8 b4 41 8e ff 90 <0f> 0b 90 90 90= 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f > RSP: 0018:ffffc90003e172f8 EFLAGS: 00010093 > RAX: ffffffff82054c9c RBX: 000000000000000b RCX: ffff88802298bc00 > RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000000 > RBP: 0000000000000001 R08: ffffffff82054b43 R09: fffff520007c2e3c > R10: dffffc0000000000 R11: fffff520007c2e3c R12: ffff88801cf0f014 > R13: 0000000000000000 R14: 000000000000000a R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000= 000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f9332107a8c CR3: 000000000e734000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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. > For information about bisection process see: https://goo.gl/tpsmEJ#bisect= ion > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > 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 > Thanks Barry