================================================================== BUG: KASAN: slab-out-of-bounds in __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] BUG: KASAN: slab-out-of-bounds in _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 Read of size 1 at addr ffff0000d14d4d09 by task syz-executor/6658 CPU: 0 UID: 0 PID: 6658 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __kasan_check_byte+0x3c/0x54 mm/kasan/common.c:568 kasan_check_byte include/linux/kasan.h:399 [inline] lock_acquire+0xb0/0x2e0 kernel/locking/lockdep.c:5842 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] igrab+0x20/0xd8 fs/inode.c:1540 ocfs2_get_system_file_inode+0x188/0x650 fs/ocfs2/sysfile.c:104 ocfs2_remove_inode fs/ocfs2/inode.c:723 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x12e8/0x3bf8 fs/ocfs2/inode.c:1292 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4474 do_rmdir+0x214/0x4c4 fs/namei.c:4516 __do_sys_unlinkat fs/namei.c:4690 [inline] __se_sys_unlinkat fs/namei.c:4684 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4684 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 1: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:330 [inline] __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4236 __kernfs_new_node+0xe4/0x5c4 fs/kernfs/dir.c:637 kernfs_new_node+0xe8/0x1f4 fs/kernfs/dir.c:713 __kernfs_create_file+0x60/0x2d4 fs/kernfs/file.c:1039 sysfs_add_file_mode_ns+0x1d8/0x294 fs/sysfs/file.c:319 create_files fs/sysfs/group.c:76 [inline] internal_create_group+0x5c0/0xe28 fs/sysfs/group.c:183 internal_create_groups fs/sysfs/group.c:223 [inline] sysfs_create_groups+0x60/0x134 fs/sysfs/group.c:249 device_add_groups drivers/base/core.c:2836 [inline] device_add_attrs+0xd8/0x6e8 drivers/base/core.c:2900 device_add+0x490/0xa60 drivers/base/core.c:3643 netdev_register_kobject+0x15c/0x2e0 net/core/net-sysfs.c:2356 register_netdevice+0xb58/0x1248 net/core/dev.c:11189 __ip_tunnel_create+0x358/0x4a0 net/ipv4/ip_tunnel.c:268 ip_tunnel_init_net+0x22c/0x630 net/ipv4/ip_tunnel.c:1161 ipgre_tap_init_net+0x38/0x48 net/ipv4/ip_gre.c:1751 ops_init+0x310/0x544 net/core/net_namespace.c:136 __register_pernet_operations net/core/net_namespace.c:1314 [inline] register_pernet_operations+0x2c0/0x6bc net/core/net_namespace.c:1391 register_pernet_device+0x3c/0x9c net/core/net_namespace.c:1478 ipgre_init+0x38/0x140 net/ipv4/ip_gre.c:1796 do_one_initcall+0x250/0x990 init/main.c:1269 do_initcall_level+0x128/0x1c4 init/main.c:1331 do_initcalls+0x70/0xd0 init/main.c:1347 do_basic_setup+0x78/0x8c init/main.c:1366 kernel_init_freeable+0x268/0x39c init/main.c:1579 kernel_init+0x24/0x1dc init/main.c:1469 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 The buggy address belongs to the object at ffff0000d14d4c30 which belongs to the cache kernfs_node_cache of size 176 The buggy address is located 41 bytes to the right of allocated 176-byte region [ffff0000d14d4c30, ffff0000d14d4ce0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1114d4 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000000 ffff0000c18b9000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000110011 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d14d4c00: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 ffff0000d14d4c80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff0000d14d4d00: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff0000d14d4d80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff0000d14d4e00: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Unable to handle kernel paging request at virtual address ffff0000d14d4d49 KASAN: maybe wild-memory-access in range [0xfffc00068a6a6a48-0xfffc00068a6a6a4f] Mem abort info: ESR = 0x0000000096000021 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x21: alignment fault Data abort info: ISV = 0, ISS = 0x00000021, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000206ec9000 [ffff0000d14d4d49] pgd=0000000000000000, p4d=180000023ffff403, pud=180000023f41b403, pmd=180000023f390403, pte=00680001114d4707 Internal error: Oops: 0000000096000021 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 6658 Comm: syz-executor Tainted: G B 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __lse__cmpxchg_case_acq_64 arch/arm64/include/asm/atomic_lse.h:272 [inline] pc : __cmpxchg_case_acq_64 arch/arm64/include/asm/cmpxchg.h:121 [inline] pc : __cmpxchg_acq arch/arm64/include/asm/cmpxchg.h:169 [inline] pc : raw_atomic64_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:4181 [inline] pc : raw_atomic64_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:4299 [inline] pc : raw_atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-long.h:1482 [inline] pc : atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4458 [inline] pc : rwsem_write_trylock+0x9c/0x34c kernel/locking/rwsem.c:268 lr : instrument_atomic_read_write include/linux/instrumented.h:96 [inline] lr : atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4457 [inline] lr : rwsem_write_trylock+0x8c/0x34c kernel/locking/rwsem.c:268 sp : ffff8000a7467200 x29: ffff8000a7467270 x28: ffff0000e9958878 x27: ffff0000d72b8000 x26: ffff0000d72b8000 x25: ffff700014e8ce6c x24: 0000000000000000 x23: 0000000000000000 x22: 1ffff00014e8ce44 x21: dfff800000000000 x20: ffff8000a7467220 x19: ffff0000d14d4d49 x18: 1fffe0003379be88 x17: ffff80008f7be000 x16: ffff800080525c58 x15: 0000000000000001 x14: 1ffff00014e8ce48 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700014e8ce49 x10: dfff800000000000 x9 : 1ffff00014e8ce48 x8 : 0000000000000001 x7 : 0000000000000000 x6 : ffff800082140010 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080525ce4 x2 : 0000000000000001 x1 : 0000000000000008 x0 : 0000000000000001 Call trace: __lse__cmpxchg_case_acq_64 arch/arm64/include/asm/atomic_lse.h:272 [inline] (P) __cmpxchg_case_acq_64 arch/arm64/include/asm/cmpxchg.h:121 [inline] (P) __cmpxchg_acq arch/arm64/include/asm/cmpxchg.h:169 [inline] (P) raw_atomic64_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:4181 [inline] (P) raw_atomic64_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:4299 [inline] (P) raw_atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-long.h:1482 [inline] (P) atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:4458 [inline] (P) rwsem_write_trylock+0x9c/0x34c kernel/locking/rwsem.c:268 (P) __down_write_common kernel/locking/rwsem.c:1316 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x60/0xc0 kernel/locking/rwsem.c:1591 inode_lock include/linux/fs.h:869 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:731 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x1300/0x3bf8 fs/ocfs2/inode.c:1292 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 d_delete_notify include/linux/fsnotify.h:377 [inline] vfs_rmdir+0x358/0x464 fs/namei.c:4474 do_rmdir+0x214/0x4c4 fs/namei.c:4516 __do_sys_unlinkat fs/namei.c:4690 [inline] __se_sys_unlinkat fs/namei.c:4684 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4684 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Code: f94023f7 d503201f aa1703f8 52800028 (c8f87e68) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f94023f7 ldr x23, [sp, #64] 4: d503201f nop 8: aa1703f8 mov x24, x23 c: 52800028 mov w8, #0x1 // #1 * 10: c8f87e68 casa x24, x8, [x19] <-- trapping instruction