netlink: 32 bytes leftover after parsing attributes in process `syz.1.336'. ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x84/0x24c fs/hfsplus/bnode.c:32 Read of size 8 at addr ffff0000cf6bbb00 by task syz.1.336/5685 CPU: 0 PID: 5685 Comm: syz.1.336 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 hfsplus_bnode_read+0x84/0x24c fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x2c4/0x4cc hfsplus_brec_remove+0x3d0/0x4a4 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x1e0/0x3ec fs/hfsplus/attributes.c:299 hfsplus_delete_attr+0x2e4/0x41c fs/hfsplus/attributes.c:345 __hfsplus_setxattr+0x3b8/0x1df0 fs/hfsplus/xattr.c:342 hfsplus_setxattr+0xb4/0xec fs/hfsplus/xattr.c:434 hfsplus_trusted_setxattr+0x54/0x6c fs/hfsplus/xattr_trusted.c:30 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x250/0x2b4 fs/xattr.c:611 path_setxattr+0x17c/0x258 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 5685: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x29c/0x4c8 mm/slub.c:4407 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] __hfs_bnode_create+0xe4/0x864 fs/hfsplus/bnode.c:416 hfsplus_bnode_find+0x200/0xcb0 fs/hfsplus/bnode.c:497 hfsplus_brec_find+0x134/0x4a0 fs/hfsplus/bfind.c:183 hfsplus_find_attr+0x1e0/0x33c hfsplus_attr_exists+0x154/0x1c8 fs/hfsplus/attributes.c:182 __hfsplus_setxattr+0x384/0x1df0 fs/hfsplus/xattr.c:336 hfsplus_setxattr+0xb4/0xec fs/hfsplus/xattr.c:434 hfsplus_trusted_setxattr+0x54/0x6c fs/hfsplus/xattr_trusted.c:30 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x250/0x2b4 fs/xattr.c:611 path_setxattr+0x17c/0x258 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 kvfree_call_rcu+0xb8/0x684 kernel/rcu/tree.c:3596 ip_ma_put+0x118/0x1bc net/ipv4/igmp.c:171 __ip_mc_dec_group+0x55c/0x634 net/ipv4/igmp.c:1697 ip_mc_dec_group include/linux/igmp.h:135 [inline] ip_mc_down+0x2e4/0x3e0 net/ipv4/igmp.c:1752 inetdev_event+0x24c/0x1234 net/ipv4/devinet.c:1584 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2018 [inline] call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] dev_close_many+0x2fc/0x468 net/core/dev.c:1619 unregister_netdevice_many+0x408/0x189c net/core/dev.c:11070 default_device_exit_batch+0x4c0/0x520 net/core/dev.c:11627 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x5e0/0x9bc net/core/net_namespace.c:599 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000cf6bba00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff0000cf6bba00, ffff0000cf6bbb00) The buggy address belongs to the page: page:00000000a3c36623 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10f6ba head:00000000a3c36623 order:1 compound_mapcount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002480 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cf6bba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000cf6bba80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000cf6bbb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000cf6bbb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000cf6bbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Unable to handle kernel paging request at virtual address ffff63300000b3a7 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001b44e0000 [ffff63300000b3a7] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 5685 Comm: syz.1.336 Tainted: G B 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : bytes_is_nonzero mm/kasan/generic.c:85 [inline] pc : memory_is_nonzero mm/kasan/generic.c:102 [inline] pc : memory_is_poisoned_n mm/kasan/generic.c:128 [inline] pc : memory_is_poisoned mm/kasan/generic.c:159 [inline] pc : check_region_inline mm/kasan/generic.c:180 [inline] pc : kasan_check_range+0x74/0x2b4 mm/kasan/generic.c:189 lr : memcpy+0x90/0xe8 mm/kasan/shadow.c:65 sp : ffff80001d7b6d90 x29: ffff80001d7b6d90 x28: 00000000000000ff x27: dfff800000000000 x26: ffff80001d7b6ec0 x25: 1ffff00002890e9e x24: 0000000000000001 x23: ffff800017105000 x22: ffff800008fc0eec x21: ffff80001d7b6ea0 x20: ffff198000059d3f x19: 0000000000000001 x18: 1fffe000368f698e x17: 1fffe000368f698e x16: ffff800011ab809c x15: ffff800014b5edc0 x14: ffff0001b47b4c80 x13: ffff0001b47b4c7c x12: 0000000000000001 x11: 1fffe3300000b3a7 x10: 1fffe3300000b3a7 x9 : ffffffffffffffff x8 : ffff63300000b3a7 x7 : 0000000000000000 x6 : ffff80000826a13c x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800008fc0eec x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffff198000059d3f Call trace: bytes_is_nonzero mm/kasan/generic.c:84 [inline] memory_is_nonzero mm/kasan/generic.c:102 [inline] memory_is_poisoned_n mm/kasan/generic.c:128 [inline] memory_is_poisoned mm/kasan/generic.c:159 [inline] check_region_inline mm/kasan/generic.c:180 [inline] kasan_check_range+0x74/0x2b4 mm/kasan/generic.c:189 memcpy+0x90/0xe8 mm/kasan/shadow.c:65 hfsplus_bnode_read+0x120/0x24c fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x2c4/0x4cc hfsplus_brec_remove+0x3d0/0x4a4 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x1e0/0x3ec fs/hfsplus/attributes.c:299 hfsplus_delete_attr+0x2e4/0x41c fs/hfsplus/attributes.c:345 __hfsplus_setxattr+0x3b8/0x1df0 fs/hfsplus/xattr.c:342 hfsplus_setxattr+0xb4/0xec fs/hfsplus/xattr.c:434 hfsplus_trusted_setxattr+0x54/0x6c fs/hfsplus/xattr_trusted.c:30 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x250/0x2b4 fs/xattr.c:611 path_setxattr+0x17c/0x258 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: 5400014c b4000b8c aa2a03e9 8b0b0129 (3940010a) ---[ end trace 14aeb9115536f2f4 ]--- pstore: crypto_comp_compress failed, ret = -22! ---------------- Code disassembly (best guess): 0: 5400014c b.gt 0x28 4: b4000b8c cbz x12, 0x174 8: aa2a03e9 mvn x9, x10 c: 8b0b0129 add x9, x9, x11 * 10: 3940010a ldrb w10, [x8] <-- trapping instruction