[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 34.361166] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.532094] random: sshd: uninitialized urandom read (32 bytes read) [ 37.820116] random: sshd: uninitialized urandom read (32 bytes read) [ 39.224597] random: sshd: uninitialized urandom read (32 bytes read) [ 58.943413] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.0' (ECDSA) to the list of known hosts. [ 64.473758] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.756615] BUG: unable to handle kernel NULL pointer dereference at 0000000000000fd0 [ 71.764626] PGD 800000019e52c067 P4D 800000019e52c067 PUD 1bcf8a067 PMD 0 [ 71.771666] Oops: 0000 [#1] SMP PTI [ 71.775292] CPU: 0 PID: 4999 Comm: syz-executor651 Not tainted 4.18.0-rc5+ #29 [ 71.782654] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.792054] RIP: 0010:radix_tree_lookup_slot+0x76/0x500 [ 71.797433] Code: 08 4c 89 75 88 48 89 5d 90 48 85 c9 74 1c e9 7b 03 00 00 90 e8 ab 8c 38 f7 4c 8b 75 88 48 8b 4d 90 48 85 c9 0f 85 64 03 00 00 <4d> 8b 26 4c 89 f7 e8 2f 37 94 f7 48 8b 08 8b 02 89 45 d4 48 89 4d [ 71.816765] RSP: 0000:ffff8801a4b4f840 EFLAGS: 00010246 [ 71.822130] RAX: ffffffff8a2f9836 RBX: 0000000000000000 RCX: 0000000000000000 [ 71.829396] RDX: 0000000000000000 RSI: 0000000000063f14 RDI: 0000000000000fc8 [ 71.836689] RBP: ffff8801a4b4f8e0 R08: 0000000000480020 R09: 0000000000000002 [ 71.843963] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 71.851234] R13: ffff8801c4820900 R14: 0000000000000fd0 R15: 0000000000000fc8 [ 71.858500] FS: 000000000177d880(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 71.866731] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.872605] CR2: 0000000000000fd0 CR3: 00000001bb3d0000 CR4: 00000000001406f0 [ 71.879871] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.887136] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.895970] Call Trace: [ 71.898584] ? pagecache_get_page+0x1a5/0x13f0 [ 71.903189] ? pagecache_get_page+0x1a5/0x13f0 [ 71.907773] ? pagecache_get_page+0x1a5/0x13f0 [ 71.912353] find_get_entry+0xe7/0x840 [ 71.916250] ? lookup_swap_cache+0x127/0x6e0 [ 71.920740] ? pagecache_get_page+0x114/0x13f0 [ 71.925321] ? lookup_swap_cache+0x127/0x6e0 [ 71.929754] pagecache_get_page+0x1a5/0x13f0 [ 71.934179] ? do_swap_page+0x32a/0x3060 [ 71.938258] ? lookup_swap_cache+0x86/0x6e0 [ 71.942587] lookup_swap_cache+0x127/0x6e0 [ 71.946834] do_swap_page+0x32a/0x3060 [ 71.950744] ? kmsan_set_origin+0x9e/0x160 [ 71.955011] handle_mm_fault+0x3401/0x85e0 [ 71.959276] ? kmsan_set_origin_inline+0x6b/0x120 [ 71.964318] __do_page_fault+0xa76/0x1810 [ 71.968491] do_page_fault+0x98/0xd0 [ 71.972229] ? page_fault+0x8/0x30 [ 71.975766] page_fault+0x1e/0x30 [ 71.979212] RIP: 0033:0x400cbb [ 71.982391] Code: Bad RIP value. [ 71.985762] RSP: 002b:00007ffd5bf252f0 EFLAGS: 00010203 [ 71.991120] RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000440859 [ 71.998390] RDX: 000000000000002c RSI: 00000000204f9fe4 RDI: 0000000000000000 [ 72.005678] RBP: 0000000000000000 R08: 000000000177d880 R09: 00000000004002c8 [ 72.012946] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000011826 [ 72.020214] R13: 0000000000401db0 R14: 0000000000000000 R15: 0000000000000000 [ 72.027492] Modules linked in: [ 72.030684] Dumping ftrace buffer: [ 72.034211] (ftrace buffer empty) [ 72.037927] CR2: 0000000000000fd0 [ 72.041513] ---[ end trace fde397c40d4d2329 ]--- [ 72.046386] RIP: 0010:radix_tree_lookup_slot+0x76/0x500 [ 72.051841] Code: 08 4c 89 75 88 48 89 5d 90 48 85 c9 74 1c e9 7b 03 00 00 90 e8 ab 8c 38 f7 4c 8b 75 88 48 8b 4d 90 48 85 c9 0f 85 64 03 00 00 <4d> 8b 26 4c 89 f7 e8 2f 37 94 f7 48 8b 08 8b 02 89 45 d4 48 89 4d [ 72.071561] RSP: 0000:ffff8801a4b4f840 EFLAGS: 00010246 [ 72.077018] RAX: ffffffff8a2f9836 RBX: 0000000000000000 RCX: 0000000000000000 [ 72.084405] RDX: 0000000000000000 RSI: 0000000000063f14 RDI: 0000000000000fc8 [ 72.091755] RBP: ffff8801a4b4f8e0 R08: 0000000000480020 R09: 0000000000000002 [ 72.099102] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 72.106468] R13: ffff8801c4820900 R14: 0000000000000fd0 R15: 0000000000000fc8 [ 72.113861] FS: 000000000177d880(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 72.122146] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.128106] CR2: 0000000000400c91 CR3: 00000001bb3d0000 CR4: 00000000001406f0 [ 72.135446] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.142811] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.150198] Kernel panic - not syncing: Fatal exception [ 72.156022] Dumping ftrace buffer: [ 72.159555] (ftrace buffer empty) [ 72.163252] Kernel Offset: disabled [ 72.166887] Rebooting in 86400 seconds..