EXT4-fs (loop4): unable to initialize flex_bg meta info! EXT4-fs (loop4): mount failed kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 20162 Comm: syz-executor.4 Not tainted 5.4.99-syzkaller-00346-g35f4b1b90596 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:legacy_get_tree+0xfe/0x170 fs/fs_context.c:652 Code: 89 ff 89 ee 48 89 da ff 14 24 48 89 c5 48 3d 01 f0 ff ff 72 07 e8 22 04 c0 ff eb 48 48 89 eb 48 83 c3 68 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 f3 bf ee ff 48 83 3b 00 74 50 e8 RSP: 0018:ffff8881afc2fcd0 EFLAGS: 00010202 RAX: 000000000000000d RBX: 0000000000000068 RCX: 0000000000040000 RDX: ffffc9000370e000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 0000000000000000 R08: ffffffff81983668 R09: 000000000000000c R10: ffffffff84800000 R11: 0000000000000000 R12: ffff8881e3335a00 R13: dffffc0000000000 R14: ffff8881e698fa00 R15: ffffffff85fa9080 FS: 00007fdcbec00700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000187466000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_get_tree+0x83/0x260 fs/super.c:1547 do_new_mount fs/namespace.c:2825 [inline] do_mount+0x19d0/0x2670 fs/namespace.c:3145 ksys_mount+0xc2/0xf0 fs/namespace.c:3354 __do_sys_mount fs/namespace.c:3368 [inline] __se_sys_mount fs/namespace.c:3365 [inline] __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3365 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x46753a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdcbebfffa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046753a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fdcbec00000 RBP: 00007fdcbec00040 R08: 00007fdcbec00040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fdcbec00000 R15: 0000000020000580 Modules linked in: ---[ end trace 17c8e1a992832d11 ]--- RIP: 0010:legacy_get_tree+0xfe/0x170 fs/fs_context.c:652 Code: 89 ff 89 ee 48 89 da ff 14 24 48 89 c5 48 3d 01 f0 ff ff 72 07 e8 22 04 c0 ff eb 48 48 89 eb 48 83 c3 68 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 f3 bf ee ff 48 83 3b 00 74 50 e8 RSP: 0018:ffff8881afc2fcd0 EFLAGS: 00010202 RAX: 000000000000000d RBX: 0000000000000068 RCX: 0000000000040000 RDX: ffffc9000370e000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 0000000000000000 R08: ffffffff81983668 R09: 000000000000000c R10: ffffffff84800000 R11: 0000000000000000 R12: ffff8881e3335a00 R13: dffffc0000000000 R14: ffff8881e698fa00 R15: ffffffff85fa9080 FS: 00007fdcbec00700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055cce8991380 CR3: 0000000187466000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400