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================================================================== BUG: KCSAN: data-race in ext4_mb_regular_allocator / mb_free_blocks read-write to 0xffff888102814b54 of 4 bytes by task 1403 on cpu 1: mb_free_blocks+0x135/0xcb0 fs/ext4/mballoc.c:1802 ext4_free_data_in_buddy+0x27e/0x580 fs/ext4/mballoc.c:3662 ext4_process_freed_data+0x24b/0x400 fs/ext4/mballoc.c:3713 ext4_journal_commit_callback+0x83/0x1a0 fs/ext4/super.c:467 jbd2_journal_commit_transaction+0x28ac/0x3180 fs/jbd2/commit.c:1160 kjournald2+0x253/0x460 fs/jbd2/journal.c:213 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffff888102814b54 of 4 bytes by task 1827 on cpu 0: ext4_mb_good_group_nolock fs/ext4/mballoc.c:2504 [inline] ext4_mb_regular_allocator+0xac9/0x1ff0 fs/ext4/mballoc.c:2747 ext4_mb_new_blocks+0x839/0xfd0 fs/ext4/mballoc.c:5616 ext4_ext_map_blocks+0xd55/0x1bb0 fs/ext4/extents.c:4281 ext4_map_blocks+0x75b/0xfc0 fs/ext4/inode.c:636 ext4_getblk+0xcb/0x410 fs/ext4/inode.c:847 ext4_bread+0x28/0x100 fs/ext4/inode.c:900 ext4_append+0xd1/0x1c0 fs/ext4/namei.c:67 ext4_init_new_dir+0x177/0x500 fs/ext4/namei.c:2893 ext4_mkdir+0x329/0x760 fs/ext4/namei.c:2939 vfs_mkdir+0x216/0x320 fs/namei.c:3931 do_mkdirat+0x105/0x280 fs/namei.c:3957 __do_sys_mkdirat fs/namei.c:3972 [inline] __se_sys_mkdirat fs/namei.c:3970 [inline] __x64_sys_mkdirat+0x4c/0x60 fs/namei.c:3970 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x000007e7 -> 0x000007f4 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1827 Comm: syz-executor.4 Not tainted 5.18.0-rc6-syzkaller-00009-gfeb9c5e19e91 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/05/11 18:27 | upstream | feb9c5e19e91 | beb0b407 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in ext4_mb_regular_allocator / mb_free_blocks |