ERROR: (device loop4): dtReadFirst: stbl[0] out of bound ERROR: (device loop4): remounting filesystem as read-only ================================================================== BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: slab-out-of-bounds in dtSearch+0x1560/0x1b28 fs/jfs/jfs_dtree.c:785 Read of size 4 at addr ffff0000f2e34fe0 by task syz.4.32/4550 CPU: 0 PID: 4550 Comm: syz.4.32 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 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350 addressPXD fs/jfs/jfs_types.h:80 [inline] dtSearch+0x1560/0x1b28 fs/jfs/jfs_dtree.c:785 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1459 __lookup_slow+0x24c/0x370 fs/namei.c:1698 lookup_slow+0x5c/0x80 fs/namei.c:1715 walk_component fs/namei.c:2006 [inline] link_path_walk+0x76c/0xc6c fs/namei.c:2333 path_lookupat+0x90/0x3d0 fs/namei.c:2486 filename_lookup+0x190/0x42c fs/namei.c:2516 user_path_at_empty+0x5c/0x84 fs/namei.c:2913 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3418 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x468/0x584 fs/namespace.c:3606 __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 4331: 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] kmalloc_trace+0x7c/0x94 mm/slab_common.c:1031 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] ref_tracker_alloc+0x11c/0x3cc lib/ref_tracker.c:85 __netdev_tracker_alloc include/linux/netdevice.h:4051 [inline] netdev_hold include/linux/netdevice.h:4080 [inline] inetdev_init+0x1dc/0x4a8 net/ipv4/devinet.c:275 inetdev_event+0xf0c/0x12ec net/ipv4/devinet.c:1547 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:2001 [inline] call_netdevice_notifiers_extack net/core/dev.c:2039 [inline] call_netdevice_notifiers+0x10c/0x18c net/core/dev.c:2053 register_netdevice+0x1188/0x15cc net/core/dev.c:10237 veth_newlink+0x62c/0xa24 drivers/net/veth.c:1756 rtnl_newlink_create net/core/rtnetlink.c:3422 [inline] __rtnl_newlink net/core/rtnetlink.c:3642 [inline] rtnl_newlink+0x102c/0x1a1c net/core/rtnetlink.c:3655 rtnetlink_rcv_msg+0x734/0xce4 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x208/0x3c4 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x6e8/0x9b0 net/netlink/af_netlink.c:1872 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 ffff0000f2e34f00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 96 bytes to the right of 128-byte region [ffff0000f2e34f00, ffff0000f2e34f80) The buggy address belongs to the physical page: page:00000000ea5628dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x132e34 flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 fffffc0003cb8dc0 dead000000000003 ffff0000c0002300 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f2e34e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f2e34f00: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000f2e34f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000f2e35000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f2e35080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ERROR: (device loop4): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop4): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop4): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop4): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 20, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5