random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) urandom_read: 1 callbacks suppressed random: sshd: uninitialized urandom read (32 bytes read) BUG: unable to handle kernel paging request at ffffeafff8d90020 IP: [] __read_once_size include/linux/compiler.h:243 [inline] IP: [] compound_head include/linux/page-flags.h:143 [inline] IP: [] PageAnon include/linux/page-flags.h:386 [inline] IP: [] page_remove_rmap+0x37/0x6d0 mm/rmap.c:1429 PGD 0 [ 31.833532] Oops: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 3656 Comm: syz-executor529 Not tainted 4.9.121-g681e57b #77 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c5594800 task.stack: ffff8801c3f30000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:243 [inline] RIP: 0010:[] [] compound_head include/linux/page-flags.h:143 [inline] RIP: 0010:[] [] PageAnon include/linux/page-flags.h:386 [inline] RIP: 0010:[] [] page_remove_rmap+0x37/0x6d0 mm/rmap.c:1429 RSP: 0018:ffff8801c3f37948 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffeafff8d90000 RCX: 0000000000000000 RDX: 1ffffd5fff1b2004 RSI: ffffffff814f5278 RDI: ffffeafff8d90000 RBP: ffff8801c3f37970 R08: 0000000000033d80 R09: 0000000000000001 R10: ffff8801c5594800 R11: 0000000000000001 R12: ffff8801c3f37c08 R13: ffffeafff8d90020 R14: ffffeafff8d90000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffeafff8d90020 CR3: 00000001c6c02000 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffeafff8d90020 ffff8801c3f37c08 ffff8801c7acb800 ffffeafff8d90000 ffff8801c95b4478 ffff8801c3f379c8 ffffffff8154c20f ffff8801c3f37c18 ffff8801c3f37c10 ffff8801c3f37c88 00003ffe364001e0 00000001c7acb000 Call Trace: [] zap_huge_pmd+0x16f/0x860 mm/huge_memory.c:1428 [] zap_pmd_range mm/memory.c:1245 [inline] [] zap_pud_range mm/memory.c:1279 [inline] [] unmap_page_range+0x12ad/0x1730 mm/memory.c:1300 [] unmap_single_vma+0x101/0x260 mm/memory.c:1345 [] unmap_vmas+0x102/0x1d0 mm/memory.c:1375 [] exit_mmap+0x214/0x3f0 mm/mmap.c:3020 [] __mmput kernel/fork.c:884 [inline] [] mmput+0xf3/0x2d0 kernel/fork.c:906 [] exit_mm kernel/exit.c:514 [inline] [] do_exit+0x906/0x27b0 kernel/exit.c:820 [] do_group_exit+0x111/0x340 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: 55 41 54 53 48 89 fb e8 c8 b6 e6 ff 4c 8d 6b 20 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 b8 05 00 00 <4c> 8b 73 20 49 89 dc 41 f6 c6 01 0f 85 4b 03 00 00 e8 93 b6 e6 RIP [] __read_once_size include/linux/compiler.h:243 [inline] RIP [] compound_head include/linux/page-flags.h:143 [inline] RIP [] PageAnon include/linux/page-flags.h:386 [inline] RIP [] page_remove_rmap+0x37/0x6d0 mm/rmap.c:1429 RSP CR2: ffffeafff8d90020 ---[ end trace 08b9457519dcbf9b ]---