Warning: Permanently added '10.128.10.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.408629] audit: type=1400 audit(1602146620.368:8): avc: denied { execmem } for pid=6467 comm="syz-executor821" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 40.418027] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 40.436437] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 40.447727] F2FS-fs (loop0): invalid crc value [ 40.499983] F2FS-fs (loop0): access invalid blkaddr:1 [ 40.505239] ------------[ cut here ]------------ [ 40.510187] WARNING: CPU: 0 PID: 6467 at fs/f2fs/checkpoint.c:166 f2fs_is_valid_blkaddr+0x5bd/0xa90 [ 40.519347] Kernel panic - not syncing: panic_on_warn set ... [ 40.519347] [ 40.526699] CPU: 0 PID: 6467 Comm: syz-executor821 Not tainted 4.19.150-syzkaller #0 [ 40.534569] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.543903] Call Trace: [ 40.546477] dump_stack+0x22c/0x33e [ 40.550100] panic+0x2ac/0x565 [ 40.553287] ? __warn_printk+0xf3/0xf3 [ 40.557160] ? f2fs_is_valid_blkaddr+0x5bd/0xa90 [ 40.561915] ? __probe_kernel_read+0x130/0x1b0 [ 40.566487] ? __warn.cold+0x5/0x5a [ 40.570100] ? __warn+0xe4/0x200 [ 40.573449] ? f2fs_is_valid_blkaddr+0x5bd/0xa90 [ 40.578200] __warn.cold+0x20/0x5a [ 40.581731] ? f2fs_is_valid_blkaddr+0x5bd/0xa90 [ 40.586476] report_bug+0x262/0x2b0 [ 40.590095] do_error_trap+0x1e1/0x330 [ 40.593965] ? math_error+0x320/0x320 [ 40.597753] ? irq_work_claim+0xa6/0xc0 [ 40.601708] ? irq_work_queue+0x29/0x80 [ 40.605662] ? error_entry+0x72/0xd0 [ 40.609365] ? trace_hardirqs_off_caller+0x6e/0x210 [ 40.614375] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.619202] invalid_op+0x14/0x20 [ 40.622638] RIP: 0010:f2fs_is_valid_blkaddr+0x5bd/0xa90 [ 40.627979] Code: 90 04 00 00 48 8b 7d 00 44 89 e1 48 c7 c2 80 d1 47 88 48 c7 c6 a0 ce 47 88 e8 0f d8 fd ff 48 c7 c7 c0 d1 47 88 e8 72 d0 23 fe <0f> 0b 45 31 e4 e9 e3 fb ff ff e8 b4 54 3a fe 48 8d bd 5c 0d 00 00 [ 40.646876] RSP: 0018:ffff8880814a7720 EFLAGS: 00010286 [ 40.652219] RAX: 0000000000000024 RBX: 0000000000000005 RCX: 0000000000000000 [ 40.659468] RDX: 0000000000000000 RSI: ffffffff815b623f RDI: ffffed1010294ed6 [ 40.666717] RBP: ffff88808de20f00 R08: 0000000000000024 R09: 0000000000000000 [ 40.673966] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 [ 40.681216] R13: 0000000000001400 R14: 0000000000004000 R15: ffff88808de21040 [ 40.688489] ? vprintk_func+0x7f/0x224 [ 40.692375] f2fs_submit_page_bio+0x19a/0x15e0 [ 40.696937] ? page_cache_tree_insert+0x410/0x410 [ 40.701784] ? check_preemption_disabled+0x41/0x2b0 [ 40.706798] read_node_page+0x496/0x660 [ 40.710786] ? truncate_node+0x1160/0x1160 [ 40.715021] ? add_to_page_cache_lru+0x259/0x6c0 [ 40.719767] ? add_to_page_cache_locked+0x40/0x40 [ 40.724596] ? pagecache_get_page+0x1c4/0xd90 [ 40.729075] __get_node_page.part.0+0x9b/0x1540 [ 40.733740] f2fs_get_node_page+0x109/0x1a0 [ 40.738044] f2fs_iget+0x22a/0x4e90 [ 40.741667] ? __mutex_add_waiter+0x160/0x160 [ 40.746173] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 40.751026] f2fs_fill_super+0x243d/0x7920 [ 40.755278] ? snprintf+0xbb/0xf0 [ 40.758711] ? f2fs_commit_super+0x400/0x400 [ 40.763102] ? __mutex_add_waiter+0x160/0x160 [ 40.767591] ? set_blocksize+0x163/0x3f0 [ 40.771651] mount_bdev+0x2fc/0x3b0 [ 40.775265] ? f2fs_commit_super+0x400/0x400 [ 40.779663] mount_fs+0xa3/0x318 [ 40.783024] vfs_kern_mount.part.0+0x68/0x470 [ 40.787499] do_mount+0x51c/0x2f10 [ 40.791034] ? __do_page_fault+0x1ca/0xe00 [ 40.795262] ? copy_mount_string+0x40/0x40 [ 40.799476] ? copy_mount_options+0x1c3/0x370 [ 40.803953] ? copy_mount_options+0x1d0/0x370 [ 40.808442] ? copy_mount_options+0x1df/0x370 [ 40.812944] ? copy_mount_options+0x261/0x370 [ 40.817432] ksys_mount+0xcf/0x130 [ 40.820966] __x64_sys_mount+0xba/0x150 [ 40.824945] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 40.829643] do_syscall_64+0xf9/0x670 [ 40.833429] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.838608] RIP: 0033:0x44714a [ 40.841785] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 40.860775] RSP: 002b:00007ffc2f294a28 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 40.868466] RAX: ffffffffffffffda RBX: 00007ffc2f294a80 RCX: 000000000044714a [ 40.875718] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc2f294a40 [ 40.882967] RBP: 00007ffc2f294a40 R08: 00007ffc2f294a80 R09: 00007ffc00000015 [ 40.890226] R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000000f [ 40.897473] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 40.905987] Kernel Offset: disabled [ 40.909657] Rebooting in 86400 seconds..