Warning: Permanently added '10.128.1.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.099144][ T6861] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 62.107127][ T6861] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 62.118834][ T6861] F2FS-fs (loop0): invalid crc_offset: 0 [ 62.128356][ T6861] general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN [ 62.140072][ T6861] KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f] [ 62.148614][ T6861] CPU: 1 PID: 6861 Comm: syz-executor912 Not tainted 5.9.0-rc5-next-20200918-syzkaller #0 [ 62.158484][ T6861] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.168533][ T6861] RIP: 0010:f2fs_usable_blks_in_seg+0x39b/0xa00 [ 62.174747][ T6861] Code: 05 00 00 49 63 d6 4c 8b 83 40 14 00 00 48 6b d2 68 49 8d 04 10 48 ba 00 00 00 00 00 fc ff df 48 8d 78 4c 48 89 fe 48 c1 ee 03 <0f> b6 34 16 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f [ 62.194388][ T6861] RSP: 0018:ffffc90000ef78b0 EFLAGS: 00010207 [ 62.200432][ T6861] RAX: 0000000000000000 RBX: ffff88809632c000 RCX: 0000000000000e00 [ 62.208378][ T6861] RDX: dffffc0000000000 RSI: 0000000000000009 RDI: 000000000000004c [ 62.216324][ T6861] RBP: 0000000000001000 R08: 0000000000000000 R09: ffffc90000ef7a81 [ 62.224269][ T6861] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000200 [ 62.232226][ T6861] R13: ffff88809632c010 R14: 0000000000000000 R15: ffff88809632d440 [ 62.240348][ T6861] FS: 0000000002206880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 62.249249][ T6861] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.255848][ T6861] CR2: 00007ffea055b000 CR3: 000000009486b000 CR4: 00000000001506e0 [ 62.263795][ T6861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.271740][ T6861] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.279696][ T6861] Call Trace: [ 62.282979][ T6861] check_block_count+0x69/0x4e0 [ 62.287816][ T6861] f2fs_build_segment_manager+0x51da/0xa370 [ 62.293697][ T6861] ? f2fs_flush_sit_entries+0x2580/0x2580 [ 62.299408][ T6861] ? map_id_range_down+0x1c4/0x340 [ 62.304527][ T6861] ? lock_downgrade+0x310/0x830 [ 62.309351][ T6861] ? __raw_spin_lock_init+0x34/0x100 [ 62.314617][ T6861] f2fs_fill_super+0x3880/0x6ff0 [ 62.319533][ T6861] ? f2fs_commit_super+0x840/0x840 [ 62.324618][ T6861] ? wait_for_completion+0x260/0x260 [ 62.329880][ T6861] ? set_blocksize+0x1c1/0x400 [ 62.334620][ T6861] mount_bdev+0x32e/0x3f0 [ 62.338995][ T6861] ? f2fs_commit_super+0x840/0x840 [ 62.344087][ T6861] ? __bpf_trace_f2fs_fiemap+0x1b0/0x1b0 [ 62.349710][ T6861] legacy_get_tree+0x105/0x220 [ 62.354448][ T6861] vfs_get_tree+0x89/0x2f0 [ 62.358859][ T6861] path_mount+0x12ae/0x1e70 [ 62.363442][ T6861] ? strncpy_from_user+0x29e/0x3a0 [ 62.368526][ T6861] ? copy_mount_string+0x40/0x40 [ 62.373447][ T6861] ? getname_flags.part.0+0x1dd/0x4f0 [ 62.378803][ T6861] __x64_sys_mount+0x27f/0x300 [ 62.383630][ T6861] ? copy_mnt_ns+0xae0/0xae0 [ 62.388193][ T6861] ? check_preemption_disabled+0x50/0x130 [ 62.393884][ T6861] ? syscall_enter_from_user_mode+0x1d/0x60 [ 62.399754][ T6861] do_syscall_64+0x2d/0x70 [ 62.404157][ T6861] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.410032][ T6861] RIP: 0033:0x44793a [ 62.413901][ T6861] 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 [ 62.433484][ T6861] RSP: 002b:00007ffea055a198 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 62.441881][ T6861] RAX: ffffffffffffffda RBX: 00007ffea055a1f0 RCX: 000000000044793a [ 62.449826][ T6861] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffea055a1b0 [ 62.457770][ T6861] RBP: 00007ffea055a1b0 R08: 00007ffea055a1f0 R09: 00007ffe00000015 [ 62.465721][ T6861] R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000004a [ 62.473680][ T6861] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 62.481627][ T6861] Modules linked in: [ 62.486482][ T6861] ---[ end trace 49ea7ada353f1c96 ]--- [ 62.491988][ T6861] RIP: 0010:f2fs_usable_blks_in_seg+0x39b/0xa00 [ 62.498245][ T6861] Code: 05 00 00 49 63 d6 4c 8b 83 40 14 00 00 48 6b d2 68 49 8d 04 10 48 ba 00 00 00 00 00 fc ff df 48 8d 78 4c 48 89 fe 48 c1 ee 03 <0f> b6 34 16 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f [ 62.517920][ T6861] RSP: 0018:ffffc90000ef78b0 EFLAGS: 00010207 [ 62.524153][ T6861] RAX: 0000000000000000 RBX: ffff88809632c000 RCX: 0000000000000e00 [ 62.532174][ T6861] RDX: dffffc0000000000 RSI: 0000000000000009 RDI: 000000000000004c [ 62.540164][ T6861] RBP: 0000000000001000 R08: 0000000000000000 R09: ffffc90000ef7a81 [ 62.548126][ T6861] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000200 [ 62.556167][ T6861] R13: ffff88809632c010 R14: 0000000000000000 R15: ffff88809632d440 [ 62.564186][ T6861] FS: 0000000002206880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 62.573161][ T6861] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.579814][ T6861] CR2: 00007ffea055b000 CR3: 000000009486b000 CR4: 00000000001506e0 [ 62.587770][ T6861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.595781][ T6861] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.603795][ T6861] Kernel panic - not syncing: Fatal exception [ 62.610499][ T6861] Kernel Offset: disabled [ 62.614834][ T6861] Rebooting in 86400 seconds..