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List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1806:b0:3a7:7ee3:108d with SMTP id e9e14a558f8ab-3c2d5c2fb2bmr320438515ab.23.1735434842542; Sat, 28 Dec 2024 17:14:02 -0800 (PST) Date: Sat, 28 Dec 2024 17:14:02 -0800 In-Reply-To: <20241229000032.619-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6770a25a.050a0220.226966.00b5.GAE@google.com> Subject: Re: [syzbot] [mm?] WARNING in __folio_rmap_sanity_checks (2) From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-out-of-bounds Read in filemap_map_pages ================================================================== BUG: KASAN: slab-out-of-bounds in ptep_get include/linux/pgtable.h:338 [inline] BUG: KASAN: slab-out-of-bounds in filemap_map_folio_range mm/filemap.c:3632 [inline] BUG: KASAN: slab-out-of-bounds in filemap_map_pages+0xde4/0x1aa0 mm/filemap.c:3749 Read of size 8 at addr ffff8880622b9010 by task syz.3.68/7906 CPU: 1 UID: 0 PID: 7906 Comm: syz.3.68 Not tainted 6.13.0-rc3-next-20241220-syzkaller-05236-g8155b4ef3466-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 ptep_get include/linux/pgtable.h:338 [inline] filemap_map_folio_range mm/filemap.c:3632 [inline] filemap_map_pages+0xde4/0x1aa0 mm/filemap.c:3749 do_fault_around mm/memory.c:5351 [inline] do_read_fault mm/memory.c:5384 [inline] do_fault mm/memory.c:5527 [inline] do_pte_missing mm/memory.c:4048 [inline] handle_pte_fault+0x3888/0x5ee0 mm/memory.c:5890 __handle_mm_fault mm/memory.c:6033 [inline] handle_mm_fault+0x11f5/0x1d50 mm/memory.c:6202 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x1a92/0x4140 mm/gup.c:1491 populate_vma_page_range+0x264/0x330 mm/gup.c:1929 __mm_populate+0x27a/0x460 mm/gup.c:2032 mm_populate include/linux/mm.h:3400 [inline] vm_mmap_pgoff+0x303/0x430 mm/util.c:585 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:607 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: 0033:0x7f4084f85d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4085da6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f4085176080 RCX: 00007f4084f85d29 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f4085001b08 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4085176080 R15: 00007fff8010b888 Allocated by task 5846: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4294 [inline] __kmalloc_node_noprof+0x290/0x4d0 mm/slub.c:4300 kmalloc_array_node_noprof include/linux/slab.h:1018 [inline] alloc_slab_obj_exts mm/slub.c:1964 [inline] account_slab mm/slub.c:2550 [inline] allocate_slab+0x179/0x3a0 mm/slub.c:2605 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] __do_kmalloc_node mm/slub.c:4293 [inline] __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4300 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:667 alloc_netdev_mqs+0xa4/0x1080 net/core/dev.c:11209 rtnl_create_link+0x2f9/0xc20 net/core/rtnetlink.c:3595 rtnl_newlink_create+0x210/0xa40 net/core/rtnetlink.c:3771 __rtnl_newlink net/core/rtnetlink.c:3897 [inline] rtnl_newlink+0x1c7e/0x2210 net/core/rtnetlink.c:4012 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6902 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 __sys_sendto+0x363/0x4c0 net/socket.c:2208 __do_sys_sendto net/socket.c:2215 [inline] __se_sys_sendto net/socket.c:2211 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2211 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 The buggy address belongs to the object at ffff8880622b9000 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes to the right of allocated 16-byte region [ffff8880622b9000, ffff8880622b9010) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x622b9 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac41640 ffffea0000cbd080 dead000000000002 raw: 0000000000000000 0000000000800080 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5846, tgid 5846 (syz-executor), ts 70570504990, free_ts 70568138444 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4754 alloc_slab_page mm/slub.c:2425 [inline] allocate_slab+0x66/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] __do_kmalloc_node mm/slub.c:4293 [inline] __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4300 kmalloc_array_node_noprof include/linux/slab.h:1018 [inline] alloc_slab_obj_exts mm/slub.c:1964 [inline] account_slab mm/slub.c:2550 [inline] allocate_slab+0x179/0x3a0 mm/slub.c:2605 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] __do_kmalloc_node mm/slub.c:4293 [inline] __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4300 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:667 alloc_netdev_mqs+0xa4/0x1080 net/core/dev.c:11209 rtnl_create_link+0x2f9/0xc20 net/core/rtnetlink.c:3595 rtnl_newlink_create+0x210/0xa40 net/core/rtnetlink.c:3771 __rtnl_newlink net/core/rtnetlink.c:3897 [inline] rtnl_newlink+0x1c7e/0x2210 net/core/rtnetlink.c:4012 page last free pid 5890 tgid 5890 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 vfree+0x1c3/0x360 mm/vmalloc.c:3383 kcov_put kernel/kcov.c:439 [inline] kcov_close+0x28/0x50 kernel/kcov.c:535 __fput+0x3e9/0x9f0 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 get_signal+0x16b2/0x1750 kernel/signal.c:3017 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880622b8f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880622b8f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880622b9000: 00 00 fc fc fa fb fc fc fa fb fc fc 00 00 fc fc ^ ffff8880622b9080: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc ffff8880622b9100: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc ================================================================== Tested on: commit: 8155b4ef Add linux-next specific files for 20241220 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13b3d0b0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9c90bb7161a56c88 dashboard link: https://syzkaller.appspot.com/bug?extid=c0673e1f1f054fac28c2 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=1156c818580000