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ext4 mb_group_prealloc 符号翻转导致 bugon 问题
Done
#ICJLYW
内核缺陷
yongjian sun
Opened this issue
2025-07-03 09:54
OLK-5.10问题： 复现用例： mkfs.ext4 -F /dev/$disk mount /dev/$disk /tmp/test echo 2147483650 > /sys/fs/ext4/$disk/mb_group_prealloc echo test > /tmp/test/file && sync 现场： ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:1981! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP CPU: 4 PID: 762 Comm: corosync Not tainted 5.10.0 #4 Hardware name: linux,dummy-virt (DT) pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--) pc : mb_mark_used+0xa58/0xcbc fs/ext4/mballoc.c:1981 lr : mb_mark_used+0xa58/0xcbc fs/ext4/mballoc.c:1981 sp : ffffa000993e6c40 x29: ffffa000993e6c40 x28: ffffa000993e6d30 x27: 1ffff4001327ce44 x26: 00000000ffffffff x25: 00000000ffffffff x24: 0000000000000001 x23: 0000000000003ff3 x22: 0000000000003ff3 x21: dfffa00000000000 x20: ffffa000993e7200 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffffa000883dee20 x15: 0000000000000000 x14: ffffa00088b2b2b8 x13: ffffa00088e0fa84 x12: ffff80001e38e889 x11: 1fffe0001e38e888 x10: ffff80001e38e888 x9 : ffffa00088e83de8 x8 : ffff0000f1c74443 x7 : 0000000000000001 x6 : ffff80001e38e888 x5 : ffff0000f1d93d80 x4 : 0000000000000000 x3 : ffffa00088e83e38 x2 : 0000000000000000 x1 : ffff0000f1d93d80 x0 : 0000000000000000 Call trace: mb_mark_used+0xa58/0xcbc fs/ext4/mballoc.c:1981 ext4_mb_use_best_found+0x22c/0xa60 fs/ext4/mballoc.c:2017 ext4_mb_check_limits+0x3cc/0x45c fs/ext4/mballoc.c:2089 ext4_mb_measure_extent.constprop.0+0x310/0x530 fs/ext4/mballoc.c:2161 ext4_mb_complex_scan_group+0x1b4/0x4f4 fs/ext4/mballoc.c:2367 ext4_mb_regular_allocator+0x9d0/0x1c44 fs/ext4/mballoc.c:2765 ext4_mb_new_blocks+0xbf4/0x16a0 fs/ext4/mballoc.c:5750 ext4_ext_map_blocks+0x1300/0x1cc0 fs/ext4/extents.c:4347 ext4_map_blocks+0x568/0x13d4 fs/ext4/inode.c:699 mpage_map_one_extent+0x178/0x590 fs/ext4/inode.c:2461 mpage_map_and_submit_extent+0x188/0x970 fs/ext4/inode.c:2514 ext4_writepages+0x1038/0x17c0 fs/ext4/inode.c:2892 do_writepages+0xe4/0x260 mm/page-writeback.c:2373 __filemap_fdatawrite_range+0x304/0x400 mm/filemap.c:415 __filemap_fdatawrite mm/filemap.c:423 [inline] filemap_flush+0x34/0x4c mm/filemap.c:450 ext4_alloc_da_blocks+0x14c/0x194 fs/ext4/inode.c:3271 ext4_release_file+0x274/0x320 fs/ext4/file.c:142 __fput+0x224/0x95c fs/file_table.c:291 ____fput+0x28/0x40 fs/file_table.c:321 task_work_run+0x204/0x3c0 kernel/task_work.c:187 tracehook_notify_resume include/linux/tracehook.h:188 [inline] do_notify_resume+0x3f4/0x440 arch/arm64/kernel/signal.c:728 work_pending+0xc/0xa4 Code: a8d37bfd d50323bf d65f03c0 97da71b6 (d4210000) kernel fault(0x1) notification starting on CPU 4 kernel fault(0x1) notification finished on CPU 4 Modules linked in: ---[ end trace db6f22b4feccd786 ]--- **二、缺陷分析结构反馈** 影响性分析说明： 缺陷严重等级:(Critical/High/Moderate/Low) 缺陷根因说明: 受影响版本排查(受影响/不受影响): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 修复是否涉及abi变化(是/否): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1
OLK-5.10问题： 复现用例： mkfs.ext4 -F /dev/$disk mount /dev/$disk /tmp/test echo 2147483650 > /sys/fs/ext4/$disk/mb_group_prealloc echo test > /tmp/test/file && sync 现场： ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:1981! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP CPU: 4 PID: 762 Comm: corosync Not tainted 5.10.0 #4 Hardware name: linux,dummy-virt (DT) pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--) pc : mb_mark_used+0xa58/0xcbc fs/ext4/mballoc.c:1981 lr : mb_mark_used+0xa58/0xcbc fs/ext4/mballoc.c:1981 sp : ffffa000993e6c40 x29: ffffa000993e6c40 x28: ffffa000993e6d30 x27: 1ffff4001327ce44 x26: 00000000ffffffff x25: 00000000ffffffff x24: 0000000000000001 x23: 0000000000003ff3 x22: 0000000000003ff3 x21: dfffa00000000000 x20: ffffa000993e7200 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffffa000883dee20 x15: 0000000000000000 x14: ffffa00088b2b2b8 x13: ffffa00088e0fa84 x12: ffff80001e38e889 x11: 1fffe0001e38e888 x10: ffff80001e38e888 x9 : ffffa00088e83de8 x8 : ffff0000f1c74443 x7 : 0000000000000001 x6 : ffff80001e38e888 x5 : ffff0000f1d93d80 x4 : 0000000000000000 x3 : ffffa00088e83e38 x2 : 0000000000000000 x1 : ffff0000f1d93d80 x0 : 0000000000000000 Call trace: mb_mark_used+0xa58/0xcbc fs/ext4/mballoc.c:1981 ext4_mb_use_best_found+0x22c/0xa60 fs/ext4/mballoc.c:2017 ext4_mb_check_limits+0x3cc/0x45c fs/ext4/mballoc.c:2089 ext4_mb_measure_extent.constprop.0+0x310/0x530 fs/ext4/mballoc.c:2161 ext4_mb_complex_scan_group+0x1b4/0x4f4 fs/ext4/mballoc.c:2367 ext4_mb_regular_allocator+0x9d0/0x1c44 fs/ext4/mballoc.c:2765 ext4_mb_new_blocks+0xbf4/0x16a0 fs/ext4/mballoc.c:5750 ext4_ext_map_blocks+0x1300/0x1cc0 fs/ext4/extents.c:4347 ext4_map_blocks+0x568/0x13d4 fs/ext4/inode.c:699 mpage_map_one_extent+0x178/0x590 fs/ext4/inode.c:2461 mpage_map_and_submit_extent+0x188/0x970 fs/ext4/inode.c:2514 ext4_writepages+0x1038/0x17c0 fs/ext4/inode.c:2892 do_writepages+0xe4/0x260 mm/page-writeback.c:2373 __filemap_fdatawrite_range+0x304/0x400 mm/filemap.c:415 __filemap_fdatawrite mm/filemap.c:423 [inline] filemap_flush+0x34/0x4c mm/filemap.c:450 ext4_alloc_da_blocks+0x14c/0x194 fs/ext4/inode.c:3271 ext4_release_file+0x274/0x320 fs/ext4/file.c:142 __fput+0x224/0x95c fs/file_table.c:291 ____fput+0x28/0x40 fs/file_table.c:321 task_work_run+0x204/0x3c0 kernel/task_work.c:187 tracehook_notify_resume include/linux/tracehook.h:188 [inline] do_notify_resume+0x3f4/0x440 arch/arm64/kernel/signal.c:728 work_pending+0xc/0xa4 Code: a8d37bfd d50323bf d65f03c0 97da71b6 (d4210000) kernel fault(0x1) notification starting on CPU 4 kernel fault(0x1) notification finished on CPU 4 Modules linked in: ---[ end trace db6f22b4feccd786 ]--- **二、缺陷分析结构反馈** 影响性分析说明： 缺陷严重等级:(Critical/High/Moderate/Low) 缺陷根因说明: 受影响版本排查(受影响/不受影响): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 修复是否涉及abi变化(是/否): openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP3 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1
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