./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3103730810 <...> Warning: Permanently added '10.128.10.52' (ED25519) to the list of known hosts. execve("./syz-executor3103730810", ["./syz-executor3103730810"], 0x7ffe7355f0e0 /* 10 vars */) = 0 brk(NULL) = 0x555568af2000 brk(0x555568af2d00) = 0x555568af2d00 arch_prctl(ARCH_SET_FS, 0x555568af2380) = 0 set_tid_address(0x555568af2650) = 290 set_robust_list(0x555568af2660, 24) = 0 rseq(0x555568af2ca0, 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-executor3103730810", 4096) = 28 getrandom("\x82\x5e\xda\x4c\x04\x45\xa0\x41", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555568af2d00 brk(0x555568b13d00) = 0x555568b13d00 brk(0x555568b14000) = 0x555568b14000 mprotect(0x7f8202bf7000, 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, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18executing program ) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81fa747000 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(0x7f81fa747000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 29.243145][ T28] audit: type=1400 audit(1748051226.606:64): avc: denied { execmem } for pid=290 comm="syz-executor310" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 29.267758][ T28] audit: type=1400 audit(1748051226.636:65): avc: denied { read write } for pid=290 comm="syz-executor310" 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 [ 29.268517][ T290] loop0: detected capacity change from 0 to 512 [ 29.294271][ T28] audit: type=1400 audit(1748051226.636:66): avc: denied { open } for pid=290 comm="syz-executor310" 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 [ 29.309921][ T290] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 29.331406][ T28] audit: type=1400 audit(1748051226.636:67): avc: denied { ioctl } for pid=290 comm="syz-executor310" 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 [ 29.342486][ T290] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 29.370268][ T28] audit: type=1400 audit(1748051226.666:68): avc: denied { mounton } for pid=290 comm="syz-executor310" path="/root/file2" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 29.392421][ T290] EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2809: Unable to expand inode 15. Delete some EAs or run e2fsck. [ 29.429760][ T290] EXT4-fs (loop0): 1 truncate cleaned up 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 [ 29.435989][ T290] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. [ 29.447250][ T28] audit: type=1400 audit(1748051226.816:69): avc: denied { mount } for pid=290 comm="syz-executor310" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 29.458387][ T290] ================================================================== [ 29.480229][ T290] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 [ 29.484109][ T28] audit: type=1400 audit(1748051226.816:70): avc: denied { setattr } for pid=290 comm="syz-executor310" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 29.489094][ T290] Read of size 18446744073709551572 at addr ffff88810d488050 by task syz-executor310/290 [ 29.513905][ T28] audit: type=1400 audit(1748051226.816:71): avc: denied { write } for pid=290 comm="syz-executor310" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 29.524877][ T290] [ 29.524891][ T290] CPU: 0 PID: 290 Comm: syz-executor310 Not tainted 6.1.134-syzkaller-00039-g3c6d0251e1fb #0 [ 29.524915][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 29.524938][ T290] Call Trace: [ 29.548875][ T28] audit: type=1400 audit(1748051226.816:72): avc: denied { add_name } for pid=290 comm="syz-executor310" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 29.551145][ T290] [ 29.551156][ T290] __dump_stack+0x21/0x24 [ 29.562490][ T28] audit: type=1400 audit(1748051226.816:73): avc: denied { create } for pid=290 comm="syz-executor310" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 29.572831][ T290] dump_stack_lvl+0xee/0x150 [ 29.572877][ T290] ? __cfi_dump_stack_lvl+0x8/0x8 [ 29.639931][ T290] ? ext4_xattr_block_set+0x9dc/0x3270 [ 29.646023][ T290] ? __ext4_unlink+0x673/0xb00 [ 29.651216][ T290] ? ext4_xattr_set_entry+0x979/0x21d0 [ 29.656893][ T290] print_address_description+0x71/0x210 [ 29.662984][ T290] print_report+0x4a/0x60 [ 29.667784][ T290] kasan_report+0x122/0x150 [ 29.673011][ T290] ? ext4_xattr_set_entry+0x979/0x21d0 [ 29.679119][ T290] ? ext4_xattr_set_entry+0x979/0x21d0 [ 29.684896][ T290] kasan_check_range+0x280/0x290 [ 29.690213][ T290] memmove+0x2d/0x70 [ 29.694233][ T290] ext4_xattr_set_entry+0x979/0x21d0 [ 29.700156][ T290] ext4_xattr_block_set+0xada/0x3270 [ 29.705972][ T290] ? __getblk_gfp+0x3b/0x7d0 [ 29.711629][ T290] ? xattr_find_entry+0x24c/0x300 [ 29.717170][ T290] ? ext4_xattr_block_find+0x310/0x310 [ 29.723446][ T290] ? ext4_xattr_block_find+0x295/0x310 [ 29.729420][ T290] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 29.735850][ T290] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 29.742033][ T290] __ext4_mark_inode_dirty+0x3cf/0x600 [ 29.748080][ T290] __ext4_unlink+0x673/0xb00 [ 29.753390][ T290] ? memcpy+0x56/0x70 [ 29.757869][ T290] ? __cfi___ext4_unlink+0x10/0x10 [ 29.763700][ T290] ? dquot_initialize+0x20/0x20 [ 29.769619][ T290] ? clear_nonspinnable+0x60/0x60 [ 29.775140][ T290] ext4_unlink+0x13a/0x3a0 [ 29.780582][ T290] vfs_unlink+0x39f/0x630 [ 29.785722][ T290] do_unlinkat+0x31f/0x6b0 [ 29.790579][ T290] ? __cfi_do_unlinkat+0x10/0x10 [ 29.795631][ T290] ? getname_flags+0x206/0x500 [ 29.800678][ T290] __x64_sys_unlink+0x49/0x50 [ 29.805722][ T290] x64_sys_call+0x958/0x9a0 [ 29.810617][ T290] do_syscall_64+0x4c/0xa0 [ 29.815696][ T290] ? clear_bhb_loop+0x15/0x70 [ 29.821026][ T290] ? clear_bhb_loop+0x15/0x70 [ 29.826347][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 29.832779][ T290] RIP: 0033:0x7f8202b84a39 [ 29.837673][ T290] 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 [ 29.859410][ T290] RSP: 002b:00007ffddf709088 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 29.868554][ T290] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f8202b84a39 [ 29.877391][ T290] RDX: 00007f8202b84a39 RSI: 00007f8202b84a39 RDI: 0000200000000180 [ 29.886752][ T290] RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 29.895359][ T290] R10: 0000000000000000 R11: 0000000000000246 R12: 0032656c69662f2e [ 29.905562][ T290] R13: 00007ffddf709268 R14: 0000000000000001 R15: 0000000000000001 [ 29.914282][ T290] [ 29.918284][ T290] [ 29.920837][ T290] Allocated by task 290: [ 29.925388][ T290] kasan_set_track+0x4b/0x70 [ 29.930468][ T290] kasan_save_alloc_info+0x25/0x30 [ 29.936483][ T290] __kasan_kmalloc+0x95/0xb0 [ 29.941666][ T290] __kmalloc_node_track_caller+0xb1/0x1e0 [ 29.948023][ T290] kmemdup+0x2b/0x60 [ 29.952528][ T290] ext4_xattr_block_set+0x9dc/0x3270 [ 29.958801][ T290] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 29.965304][ T290] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 29.971442][ T290] __ext4_mark_inode_dirty+0x3cf/0x600 [ 29.977402][ T290] __ext4_unlink+0x673/0xb00 [ 29.982199][ T290] ext4_unlink+0x13a/0x3a0 [ 29.987419][ T290] vfs_unlink+0x39f/0x630 [ 29.992536][ T290] do_unlinkat+0x31f/0x6b0 [ 29.997787][ T290] __x64_sys_unlink+0x49/0x50 [ 30.003093][ T290] x64_sys_call+0x958/0x9a0 [ 30.008153][ T290] do_syscall_64+0x4c/0xa0 [ 30.013330][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 30.019892][ T290] [ 30.022227][ T290] The buggy address belongs to the object at ffff88810d488000 [ 30.022227][ T290] which belongs to the cache kmalloc-1k of size 1024 [ 30.038702][ T290] The buggy address is located 80 bytes inside of [ 30.038702][ T290] 1024-byte region [ffff88810d488000, ffff88810d488400) [ 30.053958][ T290] [ 30.056487][ T290] The buggy address belongs to the physical page: [ 30.063384][ T290] page:ffffea0004352200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d488 [ 30.074716][ T290] head:ffffea0004352200 order:3 compound_mapcount:0 compound_pincount:0 [ 30.084000][ T290] flags: 0x4000000000010200(slab|head|zone=1) [ 30.091060][ T290] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080 [ 30.100999][ T290] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 30.110592][ T290] page dumped because: kasan: bad access detected [ 30.118350][ T290] page_owner tracks the page as allocated [ 30.124425][ T290] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 286, tgid 286 (sshd-session), ts 29448836398, free_ts 23755594625 [ 30.149503][ T290] post_alloc_hook+0x1f5/0x210 [ 30.154909][ T290] prep_new_page+0x1c/0x110 [ 30.159889][ T290] get_page_from_freelist+0x2c6e/0x2ce0 [ 30.165786][ T290] __alloc_pages+0x19e/0x3a0 [ 30.171169][ T290] alloc_slab_page+0x6e/0xf0 [ 30.176442][ T290] new_slab+0x98/0x3d0 [ 30.180973][ T290] ___slab_alloc+0x6f6/0xb50 [ 30.185602][ T290] __slab_alloc+0x5e/0xa0 [ 30.190298][ T290] __kmem_cache_alloc_node+0x203/0x2c0 [ 30.196766][ T290] __kmalloc_node_track_caller+0xa0/0x1e0 [ 30.202797][ T290] __alloc_skb+0x224/0x7e0 [ 30.208026][ T290] tcp_stream_alloc_skb+0x47/0x360 [ 30.213709][ T290] tcp_sendmsg_locked+0xd10/0x3d90 [ 30.219096][ T290] tcp_sendmsg+0x2f/0x50 [ 30.223793][ T290] inet_sendmsg+0xb6/0xd0 [ 30.228596][ T290] sock_write_iter+0x2ca/0x3b0 [ 30.234019][ T290] page last free stack trace: [ 30.240017][ T290] free_unref_page_prepare+0x742/0x750 [ 30.246022][ T290] free_unref_page+0x8f/0x530 [ 30.251065][ T290] __free_pages+0x67/0x100 [ 30.255740][ T290] __free_slab+0xca/0x1a0 [ 30.260517][ T290] __unfreeze_partials+0x160/0x190 [ 30.266185][ T290] put_cpu_partial+0xa9/0x100 [ 30.271499][ T290] __slab_free+0x1c4/0x280 [ 30.276470][ T290] ___cache_free+0xbf/0xd0 [ 30.281634][ T290] qlist_free_all+0xc6/0x140 [ 30.286444][ T290] kasan_quarantine_reduce+0x14a/0x170 [ 30.292851][ T290] __kasan_slab_alloc+0x24/0x80 [ 30.298074][ T290] slab_post_alloc_hook+0x4f/0x2d0 [ 30.303989][ T290] kmem_cache_alloc_node+0x181/0x340 [ 30.309656][ T290] __alloc_skb+0xdf/0x7e0 [ 30.314720][ T290] tcp_stream_alloc_skb+0x47/0x360 [ 30.320370][ T290] tcp_sendmsg_locked+0xd10/0x3d90 [ 30.326122][ T290] [ 30.328832][ T290] Memory state around the buggy address: [ 30.334912][ T290] ffff88810d487f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.344224][ T290] ffff88810d487f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.352927][ T290] >ffff88810d488000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.362184][ T290] ^ [ 30.369840][ T290] ffff88810d488080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.378610][ T290] ffff88810d488100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.387714][ T290] ================================================================== unlink("./file1") = 0 exit_group(0) = ? +++ exited with 0 +++ [ 30.397184][