EXT4-fs (loop2): mounted filesystem without journal. Quota mode: writeback. ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_xattr_set_entry+0xfd8/0x15ac fs/ext4/xattr.c:1700 Write of size 65688 at addr ffff0000d11da000 by task syz.2.305/5747 CPU: 0 PID: 5747 Comm: syz.2.305 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x218 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:420 kasan_report+0xa8/0x100 mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x260/0x2a0 mm/kasan/generic.c:189 memset+0x40/0x70 mm/kasan/shadow.c:44 ext4_xattr_set_entry+0xfd8/0x15ac fs/ext4/xattr.c:1700 ext4_xattr_block_set+0x614/0x2810 fs/ext4/xattr.c:1989 ext4_xattr_set_handle+0xa0c/0x102c fs/ext4/xattr.c:2414 ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2516 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x228/0x28c fs/xattr.c:617 path_setxattr+0x12c/0x25c fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:655 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 5747: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc_node_track_caller+0xe0/0x16c mm/slab_common.c:956 kmemdup+0x5c/0x98 mm/util.c:129 kmemdup include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x558/0x2810 fs/ext4/xattr.c:1937 ext4_xattr_set_handle+0xa0c/0x102c fs/ext4/xattr.c:2414 ext4_xattr_set+0x1e0/0x2b4 fs/ext4/xattr.c:2516 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x228/0x28c fs/xattr.c:617 path_setxattr+0x12c/0x25c fs/xattr.c:636 __do_sys_lsetxattr fs/xattr.c:659 [inline] __se_sys_lsetxattr fs/xattr.c:655 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:655 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0x100/0x954 kernel/rcu/tree.c:2849 sctp_transport_destroy net/sctp/transport.c:173 [inline] sctp_transport_put+0xf0/0x174 net/sctp/transport.c:486 sctp_transport_free+0x140/0x158 net/sctp/transport.c:144 sctp_association_free+0x5c0/0x6e0 net/sctp/associola.c:382 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1331 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x2ce0/0x4894 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x380/0x6a4 net/sctp/associola.c:1054 sctp_inq_push+0x190/0x1b4 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x134/0x33c net/sctp/input.c:346 sk_backlog_rcv include/net/sock.h:1125 [inline] __release_sock+0x1c4/0x3d0 net/core/sock.c:2945 release_sock+0x60/0x1bc net/core/sock.c:3511 sctp_sendmsg+0x1538/0x20cc net/sctp/socket.c:2035 inet_sendmsg+0x154/0x284 net/ipv4/af_inet.c:841 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x304/0x3fc net/socket.c:2153 __do_sys_sendto net/socket.c:2165 [inline] __se_sys_sendto net/socket.c:2161 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2161 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000d11da000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes inside of 1024-byte region [ffff0000d11da000, ffff0000d11da400) The buggy address belongs to the physical page: page:000000008543f0a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1111d8 head:000000008543f0a8 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002780 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d11da300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d11da380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d11da400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d11da480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d11da500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs error (device loop2): ext4_xattr_inode_iget:404: comm syz.2.305: inode #2451714161: comm syz.2.305: iget: illegal inode # EXT4-fs (loop2): Remounting filesystem read-only EXT4-fs error (device loop2): ext4_xattr_inode_iget:409: comm syz.2.305: error while reading EA inode 2451714161 err=-117 EXT4-fs (loop2): Remounting filesystem read-only