random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: crng init done ------------[ cut here ]------------ kernel BUG at fs/ext4/fsync.c:103! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 2080 Comm: syz-executor138 Not tainted 4.9.148+ #1 task: ffff8801cf2b2f80 task.stack: ffff8801cef58000 RIP: 0010:[] [] ext4_sync_file+0x7f8/0x10a0 fs/ext4/fsync.c:103 RSP: 0018:ffff8801db707af0 EFLAGS: 00010206 RAX: ffff8801cf2b2f80 RBX: ffff8801ca73ca80 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: ffffffff816b8b98 RDI: ffff8801cf2b3fb8 RBP: ffff8801db707b38 R08: 0000000000000000 R09: ffff8801cf2b3878 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cf1f5800 R13: ffff8801ca73caa8 R14: ffff8801d5cdd500 R15: 0000000000000000 FS: 0000000001b63880(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000021000000 CR3: 00000001cf358000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801ca73cb58 000000000000ffff 0000000000000000 ffff880100000001 ffffffff816b83a0 ffff8801cf1f5800 0000000000000001 0000000000000000 000000000000ffff ffff8801db707b88 ffffffff815b37f1 e9e627954b055420 Call Trace: [] vfs_fsync_range+0x111/0x260 fs/sync.c:195 [] generic_write_sync include/linux/fs.h:2609 [inline] [] dio_complete+0x376/0x6e0 fs/direct-io.c:282 [] dio_bio_end_aio+0x124/0x390 fs/direct-io.c:323 [] bio_endio+0x1ad/0x200 block/bio.c:1781 [] req_bio_endio block/blk-core.c:157 [inline] [] blk_update_request+0x24e/0x9d0 block/blk-core.c:2628 [] scsi_end_request+0x9c/0x5c0 drivers/scsi/scsi_lib.c:606 [] scsi_io_completion+0x275/0x17e0 drivers/scsi/scsi_lib.c:829 [] scsi_finish_command+0x3ad/0x520 drivers/scsi/scsi.c:607 [] scsi_softirq_done+0x259/0x370 drivers/scsi/scsi_lib.c:1567 [] blk_done_softirq+0x27e/0x3e0 block/blk-softirq.c:35 [] __do_softirq+0x22d/0x964 kernel/softirq.c:288 [] invoke_softirq kernel/softirq.c:368 [inline] [] irq_exit+0x119/0x160 kernel/softirq.c:409 [] exiting_irq arch/x86/include/asm/apic.h:669 [inline] [] do_IRQ+0x111/0x1d0 arch/x86/kernel/irq.c:252 [] common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:461 [] down_write+0x41/0xa0 kernel/locking/rwsem.c:52 [] ext4_map_blocks+0x77a/0x1710 fs/ext4/inode.c:605 [] mpage_map_one_extent fs/ext4/inode.c:2387 [inline] [] mpage_map_and_submit_extent fs/ext4/inode.c:2443 [inline] [] ext4_writepages+0x155e/0x2d20 fs/ext4/inode.c:2783 [] do_writepages+0xfc/0x1e0 mm/page-writeback.c:2331 [] __filemap_fdatawrite_range+0x1ad/0x260 mm/filemap.c:390 [] __filemap_fdatawrite mm/filemap.c:398 [inline] [] filemap_flush+0x24/0x30 mm/filemap.c:423 [] ext4_alloc_da_blocks+0xd6/0x340 fs/ext4/inode.c:3157 [] ext4_release_file+0x1ff/0x2e0 fs/ext4/file.c:42 [] __fput+0x274/0x720 fs/file_table.c:208 [] ____fput+0x16/0x20 fs/file_table.c:244 [] task_work_run+0x108/0x180 kernel/task_work.c:116 [] tracehook_notify_resume include/linux/tracehook.h:191 [inline] [] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:162 [] prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] [] syscall_return_slowpath arch/x86/entry/common.c:263 [inline] [] do_syscall_64+0x3f7/0x570 arch/x86/entry/common.c:290 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: 00 0f 85 03 08 00 00 49 8b bd 28 01 00 00 31 d2 be c0 00 40 02 e8 89 d5 42 00 45 85 e4 44 0f 44 e0 e9 ef fa ff ff e8 98 27 c6 ff <0f> 0b e8 91 27 c6 ff 65 8b 15 8a d5 95 7e 89 d2 48 0f a3 15 c8 RIP [] ext4_sync_file+0x7f8/0x10a0 fs/ext4/fsync.c:103 RSP ---[ end trace 6b6bb05cdaf8665d ]---