BUG: stack guard page was hit at ffffc90003c4fff8 (stack is ffffc90003c50000..ffffc90003c57fff) kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 1399 Comm: syz-executor.0 Not tainted 5.10.111-syzkaller-00181-g904c5c08bb41 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:190 Code: c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 be 0c 00 00 00 48 c7 c7 20 dc 3b 86 e8 bb bb 39 00 5d c3 cc cc cc cc cc cc cc cc cc <55> 48 89 e5 48 8b 45 08 65 48 8b 0c 25 80 6d 02 00 65 8b 15 24 bd RSP: 0018:ffffc90003c50000 EFLAGS: 00010282 RAX: 1ffff9200078a000 RBX: ffff88810b479000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810b479000 RBP: ffffc90003c50050 R08: ffffffff81db1fb4 R09: ffffc90003c50120 R10: fffff5200078a029 R11: 1ffff9200078a024 R12: dffffc0000000000 R13: dffffc0000000000 R14: 1ffff9200078a020 R15: 0000000000000000 FS: 00007fa371c29700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90003c4fff8 CR3: 0000000116cf6000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ext4_get_inode_loc+0x254/0xd70 fs/ext4/inode.c:4386 ext4_get_inode_loc+0x128/0x1d0 fs/ext4/inode.c:4525 ext4_xattr_ibody_get+0x10c/0xb20 fs/ext4/xattr.c:587 ext4_xattr_get+0x115/0x810 fs/ext4/xattr.c:651 ext4_xattr_user_get+0xc2/0xf0 fs/ext4/xattr_user.c:28 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 incfs_getxattr fs/incfs/vfs.c:1668 [inline] incfs_handler_getxattr+0xfa/0x2e0 fs/incfs/vfs.c:164 __vfs_getxattr+0x62f/0x700 fs/xattr.c:399 vfs_getxattr+0x54/0x60 fs/xattr.c:406 read_size_attr fs/incfs/vfs.c:293 [inline] fetch_regular_inode+0x155/0x300 fs/incfs/vfs.c:374 dir_lookup+0x673/0x6e0 fs/incfs/vfs.c:1008 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 lookup_one_len+0x43d/0x6a0 fs/namei.c:2642 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 __lookup_hash+0x141/0x290 fs/namei.c:1529 filename_create+0x207/0x770 fs/namei.c:3543 user_path_create fs/namei.c:3600 [inline] do_mkdirat+0xcf/0x2d0 fs/namei.c:3740 __do_sys_mkdirat fs/namei.c:3759 [inline] __se_sys_mkdirat fs/namei.c:3757 [inline] __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3757 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fa371cd40e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa371c29168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fa371de7030 RCX: 00007fa371cd40e9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: ffffffffffffff9c RBP: 00007fa371d2e08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe086b307f R14: 00007fa371c29300 R15: 0000000000022000 Modules linked in: ---[ end trace fb6fa83759f14178 ]--- RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:190 Code: c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 be 0c 00 00 00 48 c7 c7 20 dc 3b 86 e8 bb bb 39 00 5d c3 cc cc cc cc cc cc cc cc cc <55> 48 89 e5 48 8b 45 08 65 48 8b 0c 25 80 6d 02 00 65 8b 15 24 bd RSP: 0018:ffffc90003c50000 EFLAGS: 00010282 RAX: 1ffff9200078a000 RBX: ffff88810b479000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810b479000 RBP: ffffc90003c50050 R08: ffffffff81db1fb4 R09: ffffc90003c50120 R10: fffff5200078a029 R11: 1ffff9200078a024 R12: dffffc0000000000 R13: dffffc0000000000 R14: 1ffff9200078a020 R15: 0000000000000000 FS: 00007fa371c29700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90003c4fff8 CR3: 0000000116cf6000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c3 retq 1: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 8: 00 00 a: 55 push %rbp b: 48 89 e5 mov %rsp,%rbp e: be 0c 00 00 00 mov $0xc,%esi 13: 48 c7 c7 20 dc 3b 86 mov $0xffffffff863bdc20,%rdi 1a: e8 bb bb 39 00 callq 0x39bbda 1f: 5d pop %rbp 20: c3 retq 21: cc int3 22: cc int3 23: cc int3 24: cc int3 25: cc int3 26: cc int3 27: cc int3 28: cc int3 29: cc int3 * 2a: 55 push %rbp <-- trapping instruction 2b: 48 89 e5 mov %rsp,%rbp 2e: 48 8b 45 08 mov 0x8(%rbp),%rax 32: 65 48 8b 0c 25 80 6d mov %gs:0x26d80,%rcx 39: 02 00 3b: 65 gs 3c: 8b .byte 0x8b 3d: 15 .byte 0x15 3e: 24 bd and $0xbd,%al