./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2086392278 <...> Warning: Permanently added '10.128.0.239' (ED25519) to the list of known hosts. execve("./syz-executor2086392278", ["./syz-executor2086392278"], 0x7ffe1d6f2550 /* 10 vars */) = 0 brk(NULL) = 0x55556eb15000 brk(0x55556eb15d00) = 0x55556eb15d00 arch_prctl(ARCH_SET_FS, 0x55556eb15380) = 0 set_tid_address(0x55556eb15650) = 289 set_robust_list(0x55556eb15660, 24) = 0 rseq(0x55556eb15ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2086392278", 4096) = 28 getrandom("\x4f\xdd\xfc\xc0\xac\x1a\x08\xd3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556eb15d00 brk(0x55556eb36d00) = 0x55556eb36d00 brk(0x55556eb37000) = 0x55556eb37000 mprotect(0x7f1c0a82a000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1c0237a000 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 munmap(0x7f1c0237a000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 24.279289][ T28] audit: type=1400 audit(1748011663.348:64): avc: denied { execmem } for pid=289 comm="syz-executor208" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.283427][ T289] loop0: detected capacity change from 0 to 512 [ 24.299462][ T28] audit: type=1400 audit(1748011663.348:65): avc: denied { read write } for pid=289 comm="syz-executor208" name="loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file2", 0777) = 0 [ 24.307516][ T289] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 24.337348][ T28] audit: type=1400 audit(1748011663.348:66): avc: denied { open } for pid=289 comm="syz-executor208" path="/dev/loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.353739][ T289] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 24.367034][ T28] audit: type=1400 audit(1748011663.348:67): avc: denied { ioctl } for pid=289 comm="syz-executor208" path="/dev/loop0" dev="devtmpfs" ino=118 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.378991][ T289] EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2809: Unable to expand inode 15. Delete some EAs or run e2fsck. mount("/dev/loop0", "./file2", "ext4", MS_NODEV|MS_NOATIME, "nogrpid,resuid=0x0000000000000000,debug_want_extra_isize=0x0000000000000068,jqfmt=vfsv0,nombcache,qu"...) = 0 openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 chdir("./file2") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 lsetxattr("./file1", "trusted.overlay.upper", "\x65\x78\x74\x34\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 65079, 0) = 0 creat("./file2", 0655) = 4 [ 24.402010][ T28] audit: type=1400 audit(1748011663.378:68): avc: denied { mounton } for pid=289 comm="syz-executor208" path="/root/file2" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.419114][ T289] EXT4-fs (loop0): 1 truncate cleaned up [ 24.443352][ T289] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. [ 24.459489][ T289] ================================================================== [ 24.467675][ T289] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 [ 24.475441][ T289] Read of size 18446744073709551572 at addr ffff88810c092850 by task syz-executor208/289 [ 24.483832][ T28] audit: type=1400 audit(1748011663.528:69): avc: denied { mount } for pid=289 comm="syz-executor208" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 24.485247][ T289] [ 24.485254][ T289] CPU: 0 PID: 289 Comm: syz-executor208 Not tainted 6.1.134-syzkaller-00039-g3c6d0251e1fb #0 [ 24.519563][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 24.529649][ T289] Call Trace: [ 24.532941][ T289] [ 24.533824][ T28] audit: type=1400 audit(1748011663.528:70): avc: denied { setattr } for pid=289 comm="syz-executor208" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 24.535882][ T289] __dump_stack+0x21/0x24 [ 24.535915][ T289] dump_stack_lvl+0xee/0x150 [ 24.535942][ T289] ? __cfi_dump_stack_lvl+0x8/0x8 [ 24.535970][ T289] ? ext4_xattr_block_set+0x9dc/0x3270 [ 24.535996][ T289] ? __ext4_unlink+0x673/0xb00 [ 24.536018][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 24.536042][ T289] print_address_description+0x71/0x210 [ 24.593675][ T289] print_report+0x4a/0x60 [ 24.598031][ T289] kasan_report+0x122/0x150 [ 24.599071][ T28] audit: type=1400 audit(1748011663.528:71): avc: denied { write } for pid=289 comm="syz-executor208" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.602547][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 24.602577][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 24.602601][ T289] kasan_check_range+0x280/0x290 [ 24.630243][ T28] audit: type=1400 audit(1748011663.528:72): avc: denied { add_name } for pid=289 comm="syz-executor208" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.635249][ T289] memmove+0x2d/0x70 [ 24.635283][ T289] ext4_xattr_set_entry+0x979/0x21d0 [ 24.635311][ T289] ext4_xattr_block_set+0xada/0x3270 [ 24.635337][ T289] ? __getblk_gfp+0x3b/0x7d0 [ 24.640755][ T28] audit: type=1400 audit(1748011663.528:73): avc: denied { create } for pid=289 comm="syz-executor208" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 24.661076][ T289] ? xattr_find_entry+0x24c/0x300 [ 24.661107][ T289] ? ext4_xattr_block_find+0x310/0x310 [ 24.661130][ T289] ? ext4_xattr_block_find+0x295/0x310 [ 24.716316][ T289] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 24.722120][ T289] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 24.727840][ T289] __ext4_mark_inode_dirty+0x3cf/0x600 [ 24.733308][ T289] __ext4_unlink+0x673/0xb00 [ 24.737896][ T289] ? memcpy+0x56/0x70 [ 24.741875][ T289] ? __cfi___ext4_unlink+0x10/0x10 [ 24.746976][ T289] ? dquot_initialize+0x20/0x20 [ 24.751816][ T289] ? clear_nonspinnable+0x60/0x60 [ 24.756831][ T289] ext4_unlink+0x13a/0x3a0 [ 24.761234][ T289] vfs_unlink+0x39f/0x630 [ 24.765554][ T289] do_unlinkat+0x31f/0x6b0 [ 24.769960][ T289] ? __cfi_do_unlinkat+0x10/0x10 [ 24.774885][ T289] ? getname_flags+0x206/0x500 [ 24.779640][ T289] __x64_sys_unlink+0x49/0x50 [ 24.784313][ T289] x64_sys_call+0x958/0x9a0 [ 24.788802][ T289] do_syscall_64+0x4c/0xa0 [ 24.793208][ T289] ? clear_bhb_loop+0x15/0x70 [ 24.797869][ T289] ? clear_bhb_loop+0x15/0x70 [ 24.802535][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.808434][ T289] RIP: 0033:0x7f1c0a7b7a39 [ 24.812846][ T289] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 [ 24.832608][ T289] RSP: 002b:00007ffc64db3cf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 24.841017][ T289] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f1c0a7b7a39 [ 24.849006][ T289] RDX: 00007f1c0a7b7a39 RSI: 00007f1c0a7b7a39 RDI: 0000200000000180 [ 24.856979][ T289] RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 24.864936][ T289] R10: 0000000000000000 R11: 0000000000000246 R12: 0032656c69662f2e [ 24.872896][ T289] R13: 00007ffc64db3ed8 R14: 0000000000000001 R15: 0000000000000001 [ 24.880856][ T289] [ 24.883863][ T289] [ 24.886177][ T289] Allocated by task 289: [ 24.890399][ T289] kasan_set_track+0x4b/0x70 [ 24.894979][ T289] kasan_save_alloc_info+0x25/0x30 [ 24.900084][ T289] __kasan_kmalloc+0x95/0xb0 [ 24.904659][ T289] __kmalloc_node_track_caller+0xb1/0x1e0 [ 24.910369][ T289] kmemdup+0x2b/0x60 [ 24.914254][ T289] ext4_xattr_block_set+0x9dc/0x3270 [ 24.919524][ T289] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 24.925338][ T289] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 24.930958][ T289] __ext4_mark_inode_dirty+0x3cf/0x600 [ 24.936407][ T289] __ext4_unlink+0x673/0xb00 [ 24.940980][ T289] ext4_unlink+0x13a/0x3a0 [ 24.945379][ T289] vfs_unlink+0x39f/0x630 [ 24.949702][ T289] do_unlinkat+0x31f/0x6b0 [ 24.954112][ T289] __x64_sys_unlink+0x49/0x50 [ 24.958775][ T289] x64_sys_call+0x958/0x9a0 [ 24.963265][ T289] do_syscall_64+0x4c/0xa0 [ 24.967669][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.973554][ T289] [ 24.975862][ T289] The buggy address belongs to the object at ffff88810c092800 [ 24.975862][ T289] which belongs to the cache kmalloc-1k of size 1024 [ 24.989895][ T289] The buggy address is located 80 bytes inside of [ 24.989895][ T289] 1024-byte region [ffff88810c092800, ffff88810c092c00) [ 25.003151][ T289] [ 25.005458][ T289] The buggy address belongs to the physical page: [ 25.011860][ T289] page:ffffea0004302400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c090 [ 25.022094][ T289] head:ffffea0004302400 order:3 compound_mapcount:0 compound_pincount:0 [ 25.030419][ T289] flags: 0x4000000000010200(slab|head|zone=1) [ 25.036491][ T289] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 25.045082][ T289] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 25.053646][ T289] page dumped because: kasan: bad access detected [ 25.060048][ T289] page_owner tracks the page as allocated [ 25.065743][ T289] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2229515021, free_ts 0 [ 25.085350][ T289] post_alloc_hook+0x1f5/0x210 [ 25.090113][ T289] prep_new_page+0x1c/0x110 [ 25.094603][ T289] get_page_from_freelist+0x2c6e/0x2ce0 [ 25.100138][ T289] __alloc_pages+0x19e/0x3a0 [ 25.104717][ T289] alloc_slab_page+0x6e/0xf0 [ 25.109300][ T289] new_slab+0x98/0x3d0 [ 25.113358][ T289] ___slab_alloc+0x6f6/0xb50 [ 25.117934][ T289] __slab_alloc+0x5e/0xa0 [ 25.122254][ T289] __kmem_cache_alloc_node+0x203/0x2c0 [ 25.127700][ T289] __kmalloc+0xa1/0x1e0 [ 25.131848][ T289] blk_stat_alloc_callback+0x91/0x210 [ 25.137206][ T289] blk_mq_init_allocated_queue+0x173/0x16b0 [ 25.143087][ T289] blk_mq_init_queue+0xa6/0x120 [ 25.147940][ T289] scsi_alloc_sdev+0x6a0/0xac0 [ 25.152696][ T289] scsi_probe_and_add_lun+0x192/0x3bb0 [ 25.158145][ T289] __scsi_scan_target+0x1e8/0xbb0 [ 25.163161][ T289] page_owner free stack trace missing [ 25.168510][ T289] [ 25.170815][ T289] Memory state around the buggy address: [ 25.176434][ T289] ffff88810c092700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.184565][ T289] ffff88810c092780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.192609][ T289] >ffff88810c092800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.200674][ T289] ^ [ 25.207341][ T289] ffff88810c092880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.215385][ T289] ffff88810c092900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.223430][ T289] ================================================================== unlink("./file1") = 0 exit_group(0) = ? +++ exited with 0 +++ [ 25.231763][ T