Hi, we also reproduce such bug recently, and have sent out our patch[1]. In addition, another issue related with xfs and file THP is also fixed[2]. Looking forward to reviews. [1]https://patchwork.kernel.org/project/linux-mm/patch/20210906121200.57905-2-rongwei.wang@xxxxxxxxxxxxxxxxx/ [2]https://patchwork.kernel.org/project/linux-mm/patch/20210906121200.57905-3-rongwei.wang@xxxxxxxxxxxxxxxxx/ On 9/6/21 2:15 PM, Hao Sun wrote:
Hello, When using Healer to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: 9e9fb7655ed58 Merge tag 'net-next-5.15' git tree: upstream console output: https://drive.google.com/file/d/1_eEgvafiNcZHqHlmjIy4d420gQTvkf3r/view?usp=sharing kernel config: https://drive.google.com/file/d/1zgxbwaYkrM26KEmJ-5sUZX57gfXtRrwA/view?usp=sharing C reproducer: https://drive.google.com/file/d/1ZLAhA14JN9prY7Fei_WWnuhNXCg8AM8C/view?usp=sharing Syzlang reproducer: https://drive.google.com/file/d/1TejG8gPgiAkJsKBlwFdHIADKXDK-H6j8/view?usp=sharing If you fix this issue, please add the following tag to the commit: Reported-by: Hao Sun <sunhao.th@xxxxxxxxx> page:ffffea0004730040 refcount:514 mapcount:1 mapping:ffff88800d7d13e8 index:0x1 pfn:0x11cc01 head:ffffea0004730000 order:9 compound_mapcount:1 compound_pincount:0 memcg:ffff888009ba2000 aops:def_blk_aops ino:fa00000 flags: 0x57ff0000001001f(locked|referenced|uptodate|dirty|lru|head|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000000000 ffffea0004730001 0000000000000903 dead000000000200 raw: 0000000000000100 0000000000000000 0000000000000000 0000000000000000 head: 057ff0000001001f ffffea00044edec8 ffffea00044c2708 ffff88800d7d13e8 head: 0000000000000000 0000000000000000 0000020200000000 ffff888009ba2000 page dumped because: VM_BUG_ON_PAGE(PageTail(page)) page_owner tracks the page as allocated page last allocated via order 9, migratetype Movable, gfp_mask 0x13c24ca(GFP_TRANSHUGE|__GFP_THISNODE), pid 1665, ts 469126509176, free_ts 440578020808 prep_new_page+0x16/0x50 mm/page_alloc.c:2436 get_page_from_freelist+0x64d/0x29a0 mm/page_alloc.c:4168 __alloc_pages+0xde/0x2a0 mm/page_alloc.c:5390 __alloc_pages_node include/linux/gfp.h:570 [inline] khugepaged_alloc_page+0x4e/0xc0 mm/khugepaged.c:881 collapse_file+0x124/0x2110 mm/khugepaged.c:1655 khugepaged_scan_file mm/khugepaged.c:2051 [inline] khugepaged_scan_mm_slot mm/khugepaged.c:2146 [inline] khugepaged_do_scan mm/khugepaged.c:2230 [inline] khugepaged+0x1f8a/0x3540 mm/khugepaged.c:2275 kthread+0x178/0x1b0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1346 [inline] free_pcp_prepare+0x1d7/0x480 mm/page_alloc.c:1397 free_unref_page_prepare mm/page_alloc.c:3332 [inline] free_unref_page+0x19/0x1c0 mm/page_alloc.c:3411 release_pages+0x212/0x1130 mm/swap.c:948 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0x60/0x1e0 mm/mmu_gather.c:249 zap_pte_range mm/memory.c:1432 [inline] zap_pmd_range mm/memory.c:1481 [inline] zap_pud_range mm/memory.c:1510 [inline] zap_p4d_range mm/memory.c:1531 [inline] unmap_page_range+0xea6/0x15c0 mm/memory.c:1552 unmap_single_vma+0xae/0x140 mm/memory.c:1597 unmap_vmas+0xed/0x190 mm/memory.c:1629 exit_mmap+0xc9/0x2a0 mm/mmap.c:3195 __mmput kernel/fork.c:1103 [inline] mmput+0x8a/0x1a0 kernel/fork.c:1124 exit_mm kernel/exit.c:501 [inline] do_exit+0x462/0x11c0 kernel/exit.c:812 do_group_exit+0x57/0xe0 kernel/exit.c:922 get_signal+0x1d0/0x10b0 kernel/signal.c:2823 arch_do_signal_or_restart+0xa9/0x860 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0xf2/0x280 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x40/0xb0 arch/x86/entry/common.c:86 ------------[ cut here ]------------ kernel BUG at mm/truncate.c:213! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 27281 Comm: syz-executor Not tainted 5.14.0+ #12 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:truncate_inode_page+0x5a/0x70 mm/truncate.c:213 Code: ff ff 48 89 ef e8 56 9e fd ff e8 71 2d f0 ff 89 d8 5b 5d 41 5c c3 e8 65 2d f0 ff 48 c7 c6 20 19 2d 85 48 89 ef e8 f6 f7 03 00 <0f> 0b bb fb ff ff ff eb d7 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc9000361fc88 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90001356000 RDX: 0000000000040000 RSI: ffffffff8147479a RDI: 00000000ffffffff RBP: ffffea0004730040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 637379735f6f6420 R12: ffff88800d7d13e8 R13: ffffc9000361fd48 R14: 0000000000000001 R15: ffffc9000361fcd0 FS: 00007f3c4f6a0700(0000) GS:ffff88813dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000204001ff CR3: 000000010f099000 CR4: 0000000000750ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: truncate_inode_pages_range+0x3b9/0xc30 mm/truncate.c:397 truncate_bdev_range+0x87/0xd0 fs/block_dev.c:125 blk_ioctl_zeroout block/ioctl.c:173 [inline] blkdev_common_ioctl+0x2c3/0xad0 block/ioctl.c:472 blkdev_ioctl+0x2c2/0x370 block/ioctl.c:583 block_ioctl+0x55/0x70 fs/block_dev.c:1421 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0xb6/0x100 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x34/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46a9a9 Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3c4f69fc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000078c210 RCX: 000000000046a9a9 RDX: 00000000200003c0 RSI: 000000000000127f RDI: 0000000000000004 RBP: 00000000004e4042 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078c210 R13: 0000000000000000 R14: 000000000078c210 R15: 00007fff7770d6e0 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 4d3d97b8450ac449 ]--- RIP: 0010:truncate_inode_page+0x5a/0x70 mm/truncate.c:213 Code: ff ff 48 89 ef e8 56 9e fd ff e8 71 2d f0 ff 89 d8 5b 5d 41 5c c3 e8 65 2d f0 ff 48 c7 c6 20 19 2d 85 48 89 ef e8 f6 f7 03 00 <0f> 0b bb fb ff ff ff eb d7 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc9000361fc88 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90001356000 RDX: 0000000000040000 RSI: ffffffff8147479a RDI: 00000000ffffffff RBP: ffffea0004730040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 637379735f6f6420 R12: ffff88800d7d13e8 R13: ffffc9000361fd48 R14: 0000000000000001 R15: ffffc9000361fcd0 FS: 00007f3c4f6a0700(0000) GS:ffff88813dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000204001ff CR3: 000000010f099000 CR4: 0000000000750ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554
-- Thanks, Yu
