================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_write_lock+0x5c/0xe8 fs/reiserfs/lock.c:26 Read of size 8 at addr ffff000110f4aeb8 by task syz-executor.5/10354 CPU: 1 PID: 10354 Comm: syz-executor.5 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report+0xd4/0x130 mm/kasan/report.c:536 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 reiserfs_write_lock+0x5c/0xe8 fs/reiserfs/lock.c:26 reiserfs_readdir_inode+0x150/0xf24 fs/reiserfs/dir.c:79 reiserfs_readdir+0x48/0x58 fs/reiserfs/dir.c:274 iterate_dir+0x1f4/0x4e4 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 10354: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:510 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] kmalloc_trace+0x70/0x88 mm/slab_common.c:1066 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] minix_fill_super+0x6c/0x167c fs/minix/inode.c:183 mount_bdev+0x26c/0x368 fs/super.c:1380 minix_mount+0x44/0x58 fs/minix/inode.c:688 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:491 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:501 kvfree_call_rcu+0xa8/0x688 kernel/rcu/tree.c:3327 cfg80211_update_known_bss+0x13c/0x7e0 cfg80211_bss_update+0x160/0x1c64 net/wireless/scan.c:1728 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2492 [inline] cfg80211_inform_bss_frame_data+0x9f0/0x1f40 net/wireless/scan.c:2525 ieee80211_bss_info_update+0x69c/0xc84 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x918/0x2974 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1583 [inline] ieee80211_iface_work+0x5cc/0xa94 net/mac80211/iface.c:1637 process_one_work+0x788/0x12d4 kernel/workqueue.c:2390 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff000110f4ae00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 88 bytes to the right of allocated 96-byte region [ffff000110f4ae00, ffff000110f4ae60) The buggy address belongs to the physical page: page:00000000c6d2c9e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x150f4a flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 ffff0000c0002300 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000110f4ad80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff000110f4ae00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff000110f4ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff000110f4af00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff000110f4af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Unable to handle kernel paging request at virtual address dfff800000000005 KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000005] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 10354 Comm: syz-executor.5 Tainted: G B 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : search_by_key+0x228/0x3a64 fs/reiserfs/stree.c:648 lr : pathrelse fs/reiserfs/stree.c:384 [inline] lr : search_by_key+0x1cc/0x3a64 fs/reiserfs/stree.c:641 sp : ffff80002dc674a0 x29: ffff80002dc676f0 x28: ffff80002dc67960 x27: ffff80002dc67a80 x26: dfff800000000000 x25: ffff000118998678 x24: ffff80002dc67a80 x23: ffff80002dc67a00 x22: ffff000118998000 x21: ffff80002dc67660 x20: 000000000000002b x19: 0000000000000028 x18: 1fffe00036855db6 x17: ffff800015c7d000 x16: ffff800012264800 x15: 0000000000000002 x14: 0000000000000000 x13: 0000000040000002 x12: 0000000000000008 x11: 0000000000040000 x10: 0000000000023e83 x9 : 0000000000000020 x8 : 0000000000000005 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff800008d98618 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: search_by_key+0x228/0x3a64 fs/reiserfs/stree.c:648 search_by_entry_key+0x4c/0xe88 fs/reiserfs/namei.c:125 reiserfs_readdir_inode+0x230/0xf24 fs/reiserfs/dir.c:98 reiserfs_readdir+0x48/0x58 fs/reiserfs/dir.c:274 iterate_dir+0x1f4/0x4e4 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: f9400269 91002133 91002d34 d343fe68 (38fa6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f9400269 ldr x9, [x19] 4: 91002133 add x19, x9, #0x8 8: 91002d34 add x20, x9, #0xb c: d343fe68 lsr x8, x19, #3 * 10: 38fa6908 ldrsb w8, [x8, x26] <-- trapping instruction