Hello, syzbot found the following issue on: HEAD commit: 3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11f472e4300000 kernel config: https://syzkaller.appspot.com/x/.config?x=55ac6a927d7e3fe9 dashboard link: https://syzkaller.appspot.com/bug?extid=d00808b55445133eca1e syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1258bdfc300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d00808b55445133eca1e@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff888113d82958 (size 104): comm "kworker/u4:0", pid 8, jiffies 4294943328 (age 340.640s) hex dump (first 32 bytes): c0 33 c0 13 81 88 ff ff 22 01 00 00 00 00 ad de .3......"....... 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... backtrace: [<ffffffff8176822b>] kmem_cache_zalloc include/linux/slab.h:711 [inline] [<ffffffff8176822b>] ext4_mb_pa_alloc fs/ext4/mballoc.c:4974 [inline] [<ffffffff8176822b>] ext4_mb_new_blocks+0xd5b/0x18b0 fs/ext4/mballoc.c:5509 [<ffffffff817238ed>] ext4_ext_map_blocks+0xdfd/0x28f0 fs/ext4/extents.c:4245 [<ffffffff81746633>] ext4_map_blocks+0x333/0xb10 fs/ext4/inode.c:638 [<ffffffff8174d632>] mpage_map_one_extent fs/ext4/inode.c:2395 [inline] [<ffffffff8174d632>] mpage_map_and_submit_extent fs/ext4/inode.c:2448 [inline] [<ffffffff8174d632>] ext4_writepages+0xc82/0x19c0 fs/ext4/inode.c:2800 [<ffffffff81451c5a>] do_writepages+0x4a/0x120 mm/page-writeback.c:2355 [<ffffffff815bd0be>] __writeback_single_inode+0x6e/0x520 fs/fs-writeback.c:1610 [<ffffffff815bdc34>] writeback_sb_inodes+0x2d4/0x710 fs/fs-writeback.c:1875 [<ffffffff815be0cb>] __writeback_inodes_wb+0x5b/0x150 fs/fs-writeback.c:1944 [<ffffffff815be5f3>] wb_writeback+0x433/0x4a0 fs/fs-writeback.c:2050 [<ffffffff815c007a>] wb_check_old_data_flush fs/fs-writeback.c:2152 [inline] [<ffffffff815c007a>] wb_do_writeback fs/fs-writeback.c:2205 [inline] [<ffffffff815c007a>] wb_workfn+0x3fa/0x760 fs/fs-writeback.c:2234 [<ffffffff812627d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276 [<ffffffff812630c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422 [<ffffffff8126c528>] kthread+0x188/0x1d0 kernel/kthread.c:319 [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 BUG: memory leak unreferenced object 0xffff888113d82a28 (size 104): comm "kworker/u4:0", pid 8, jiffies 4294943328 (age 340.640s) hex dump (first 32 bytes): d8 08 c1 13 81 88 ff ff 22 01 00 00 00 00 ad de ........"....... 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... backtrace: [<ffffffff8176822b>] kmem_cache_zalloc include/linux/slab.h:711 [inline] [<ffffffff8176822b>] ext4_mb_pa_alloc fs/ext4/mballoc.c:4974 [inline] [<ffffffff8176822b>] ext4_mb_new_blocks+0xd5b/0x18b0 fs/ext4/mballoc.c:5509 [<ffffffff817238ed>] ext4_ext_map_blocks+0xdfd/0x28f0 fs/ext4/extents.c:4245 [<ffffffff81746633>] ext4_map_blocks+0x333/0xb10 fs/ext4/inode.c:638 [<ffffffff8174d632>] mpage_map_one_extent fs/ext4/inode.c:2395 [inline] [<ffffffff8174d632>] mpage_map_and_submit_extent fs/ext4/inode.c:2448 [inline] [<ffffffff8174d632>] ext4_writepages+0xc82/0x19c0 fs/ext4/inode.c:2800 [<ffffffff81451c5a>] do_writepages+0x4a/0x120 mm/page-writeback.c:2355 [<ffffffff815bd0be>] __writeback_single_inode+0x6e/0x520 fs/fs-writeback.c:1610 [<ffffffff815bdc34>] writeback_sb_inodes+0x2d4/0x710 fs/fs-writeback.c:1875 [<ffffffff815be0cb>] __writeback_inodes_wb+0x5b/0x150 fs/fs-writeback.c:1944 [<ffffffff815be5f3>] wb_writeback+0x433/0x4a0 fs/fs-writeback.c:2050 [<ffffffff815c007a>] wb_check_old_data_flush fs/fs-writeback.c:2152 [inline] [<ffffffff815c007a>] wb_do_writeback fs/fs-writeback.c:2205 [inline] [<ffffffff815c007a>] wb_workfn+0x3fa/0x760 fs/fs-writeback.c:2234 [<ffffffff812627d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276 [<ffffffff812630c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422 [<ffffffff8126c528>] kthread+0x188/0x1d0 kernel/kthread.c:319 [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 BUG: memory leak unreferenced object 0xffff888113d82a90 (size 104): comm "kworker/u4:0", pid 8, jiffies 4294943328 (age 340.640s) hex dump (first 32 bytes): b0 1d c1 13 81 88 ff ff 22 01 00 00 00 00 ad de ........"....... 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... backtrace: [<ffffffff8176822b>] kmem_cache_zalloc include/linux/slab.h:711 [inline] [<ffffffff8176822b>] ext4_mb_pa_alloc fs/ext4/mballoc.c:4974 [inline] [<ffffffff8176822b>] ext4_mb_new_blocks+0xd5b/0x18b0 fs/ext4/mballoc.c:5509 [<ffffffff817238ed>] ext4_ext_map_blocks+0xdfd/0x28f0 fs/ext4/extents.c:4245 [<ffffffff81746633>] ext4_map_blocks+0x333/0xb10 fs/ext4/inode.c:638 [<ffffffff8174d632>] mpage_map_one_extent fs/ext4/inode.c:2395 [inline] [<ffffffff8174d632>] mpage_map_and_submit_extent fs/ext4/inode.c:2448 [inline] [<ffffffff8174d632>] ext4_writepages+0xc82/0x19c0 fs/ext4/inode.c:2800 [<ffffffff81451c5a>] do_writepages+0x4a/0x120 mm/page-writeback.c:2355 [<ffffffff815bd0be>] __writeback_single_inode+0x6e/0x520 fs/fs-writeback.c:1610 [<ffffffff815bdc34>] writeback_sb_inodes+0x2d4/0x710 fs/fs-writeback.c:1875 [<ffffffff815be0cb>] __writeback_inodes_wb+0x5b/0x150 fs/fs-writeback.c:1944 [<ffffffff815be5f3>] wb_writeback+0x433/0x4a0 fs/fs-writeback.c:2050 [<ffffffff815c007a>] wb_check_old_data_flush fs/fs-writeback.c:2152 [inline] [<ffffffff815c007a>] wb_do_writeback fs/fs-writeback.c:2205 [inline] [<ffffffff815c007a>] wb_workfn+0x3fa/0x760 fs/fs-writeback.c:2234 [<ffffffff812627d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276 [<ffffffff812630c9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422 [<ffffffff8126c528>] kthread+0x188/0x1d0 kernel/kthread.c:319 [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 BUG: memory leak unreferenced object 0xffff888123294558 (size 1176): comm "syz-executor.1", pid 8467, jiffies 4294969731 (age 76.670s) hex dump (first 32 bytes): 0a f3 00 00 04 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81794e19>] ext4_alloc_inode+0x19/0x1a0 fs/ext4/super.c:1281 [<ffffffff81598827>] alloc_inode+0x27/0x100 fs/inode.c:233 [<ffffffff81598923>] new_inode_pseudo fs/inode.c:934 [inline] [<ffffffff81598923>] new_inode+0x23/0x100 fs/inode.c:963 [<ffffffff81735ce7>] __ext4_new_inode+0x127/0x26d0 fs/ext4/ialloc.c:958 [<ffffffff8177c2bf>] ext4_mkdir+0x1ef/0x550 fs/ext4/namei.c:2921 [<ffffffff8157b7a8>] vfs_mkdir+0x258/0x330 fs/namei.c:3813 [<ffffffff81582155>] do_mkdirat+0x1a5/0x1f0 fs/namei.c:3838 [<ffffffff8439b235>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8439b235>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 401.478399][ C --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
