loop4: detected capacity change from 0 to 8
==================================================================
BUG: KASAN: slab-use-after-free in squashfs_page_actor_free fs/squashfs/page_actor.h:41 [inline]
BUG: KASAN: slab-use-after-free in squashfs_readahead+0x210c/0x2680 fs/squashfs/file.c:626
Read of size 4 at addr ffff88801c7f1fc0 by task syz.4.517/6520

CPU: 0 UID: 0 PID: 6520 Comm: syz.4.517 Not tainted 6.11.0-rc4-next-20240822-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 squashfs_page_actor_free fs/squashfs/page_actor.h:41 [inline]
 squashfs_readahead+0x210c/0x2680 fs/squashfs/file.c:626
 read_pages+0x17e/0x840 mm/readahead.c:160
 page_cache_ra_unbounded+0x6ce/0x7f0 mm/readahead.c:273
 page_cache_sync_readahead include/linux/pagemap.h:1296 [inline]
 filemap_get_pages+0x543/0x2330 mm/filemap.c:2529
 filemap_read+0x457/0xfa0 mm/filemap.c:2628
 __kernel_read+0x532/0x9f0 fs/read_write.c:434
 integrity_kernel_read+0xb0/0x100 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0xaef/0x1b30 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x526/0xb20 security/integrity/ima/ima_api.c:293
 process_measurement+0x1357/0x1fb0 security/integrity/ima/ima_main.c:372
 ima_file_check+0xf2/0x170 security/integrity/ima/ima_main.c:572
 security_file_post_open+0xb9/0x280 security/security.c:3154
 do_open fs/namei.c:3776 [inline]
 path_openat+0x2cd0/0x3590 fs/namei.c:3933
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fec3f379e79
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fec40214038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fec3f515f80 RCX: 00007fec3f379e79
RDX: 0000000000000000 RSI: 0000000020000100 RDI: ffffffffffffff9c
RBP: 00007fec3f3e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fec3f515f80 R15: 00007ffd7015cbb8
 </TASK>

Allocated by task 6520:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4237
 kmalloc_noprof include/linux/slab.h:681 [inline]
 squashfs_page_actor_init_special+0x64/0x440 fs/squashfs/page_actor.c:113
 squashfs_readahead+0x188f/0x2680 fs/squashfs/file.c:619
 read_pages+0x17e/0x840 mm/readahead.c:160
 page_cache_ra_unbounded+0x6ce/0x7f0 mm/readahead.c:273
 page_cache_sync_readahead include/linux/pagemap.h:1296 [inline]
 filemap_get_pages+0x543/0x2330 mm/filemap.c:2529
 filemap_read+0x457/0xfa0 mm/filemap.c:2628
 __kernel_read+0x532/0x9f0 fs/read_write.c:434
 integrity_kernel_read+0xb0/0x100 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0xaef/0x1b30 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x526/0xb20 security/integrity/ima/ima_api.c:293
 process_measurement+0x1357/0x1fb0 security/integrity/ima/ima_main.c:372
 ima_file_check+0xf2/0x170 security/integrity/ima/ima_main.c:572
 security_file_post_open+0xb9/0x280 security/security.c:3154
 do_open fs/namei.c:3776 [inline]
 path_openat+0x2cd0/0x3590 fs/namei.c:3933
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6520:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2299 [inline]
 slab_free mm/slub.c:4521 [inline]
 kfree+0x196/0x3e0 mm/slub.c:4669
 squashfs_page_actor_free fs/squashfs/page_actor.h:39 [inline]
 squashfs_readahead+0x195b/0x2680 fs/squashfs/file.c:626
 read_pages+0x17e/0x840 mm/readahead.c:160
 page_cache_ra_unbounded+0x6ce/0x7f0 mm/readahead.c:273
 page_cache_sync_readahead include/linux/pagemap.h:1296 [inline]
 filemap_get_pages+0x543/0x2330 mm/filemap.c:2529
 filemap_read+0x457/0xfa0 mm/filemap.c:2628
 __kernel_read+0x532/0x9f0 fs/read_write.c:434
 integrity_kernel_read+0xb0/0x100 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0xaef/0x1b30 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x526/0xb20 security/integrity/ima/ima_api.c:293
 process_measurement+0x1357/0x1fb0 security/integrity/ima/ima_main.c:372
 ima_file_check+0xf2/0x170 security/integrity/ima/ima_main.c:572
 security_file_post_open+0xb9/0x280 security/security.c:3154
 do_open fs/namei.c:3776 [inline]
 path_openat+0x2cd0/0x3590 fs/namei.c:3933
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801c7f1f80
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 64 bytes inside of
 freed 96-byte region [ffff88801c7f1f80, ffff88801c7f1fe0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c7f1
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000000 ffff888015841280 ffffea000072a980 dead000000000005
raw: 0000000000000000 0000000080200020 00000001fdffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 3027, tgid 3027 (kworker/u8:7), ts 63651454030, free_ts 63646720536
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1517
 prep_new_page mm/page_alloc.c:1525 [inline]
 get_page_from_freelist+0x3131/0x3280 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x29e/0x780 mm/page_alloc.c:4743
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2368
 allocate_slab+0x5a/0x2f0 mm/slub.c:2531
 new_slab mm/slub.c:2584 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3771
 __slab_alloc+0x58/0xa0 mm/slub.c:3861
 __slab_alloc_node mm/slub.c:3914 [inline]
 slab_alloc_node mm/slub.c:4073 [inline]
 __do_kmalloc_node mm/slub.c:4205 [inline]
 __kmalloc_noprof+0x25a/0x400 mm/slub.c:4218
 kmalloc_noprof include/linux/slab.h:685 [inline]
 kzalloc_noprof include/linux/slab.h:817 [inline]
 cfg80211_inform_single_bss_data+0xaff/0x2030 net/wireless/scan.c:2307
 cfg80211_inform_bss_data+0x3dd/0x5a70 net/wireless/scan.c:3159
 cfg80211_inform_bss_frame_data+0x3b8/0x720 net/wireless/scan.c:3254
 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226
 ieee80211_rx_bss_info net/mac80211/ibss.c:1100 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1579 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1962/0x2d70 net/mac80211/ibss.c:1606
 ieee80211_iface_process_skb net/mac80211/iface.c:1588 [inline]
 ieee80211_iface_work+0x8a5/0xf20 net/mac80211/iface.c:1642
 cfg80211_wiphy_work+0x2db/0x490 net/wireless/core.c:440
 process_one_work kernel/workqueue.c:3232 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3313
page last free pid 5224 tgid 5224 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1098 [inline]
 free_unref_page+0xc07/0xd90 mm/page_alloc.c:2651
 vfree+0x186/0x2e0 mm/vmalloc.c:3380
 zlib_free+0x44/0x60 fs/squashfs/zlib_wrapper.c:47
 squashfs_decompressor_destroy+0x9c/0xc0 fs/squashfs/decompressor_single.c:57
 squashfs_put_super+0x14b/0x250 fs/squashfs/super.c:592
 generic_shutdown_super+0x139/0x2d0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1696
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88801c7f1e80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff88801c7f1f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88801c7f1f80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                           ^
 ffff88801c7f2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801c7f2080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================