EXT4-fs error (device loop4): ext4_xattr_inode_iget:409: comm syz.4.20: error while reading EA inode 1 err=-117
EXT4-fs (loop4): 1 orphan inode deleted
==================================================================
BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:886 [inline]
BUG: KASAN: use-after-free in detach_timer kernel/time/timer.c:886 [inline]
BUG: KASAN: use-after-free in detach_if_pending+0x1d3/0x390 kernel/time/timer.c:905
Write of size 8 at addr ffff8881144924c0 by task syz.4.20/420

CPU: 0 PID: 420 Comm: syz.4.20 Not tainted 6.1.118-syzkaller-00079-geeccb2921815 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:356
 __hlist_del include/linux/list.h:886 [inline]
 detach_timer kernel/time/timer.c:886 [inline]
 detach_if_pending+0x1d3/0x390 kernel/time/timer.c:905
 __mod_timer+0x2ea/0xcf0 kernel/time/timer.c:1082
 mod_timer+0x1f/0x30 kernel/time/timer.c:1172
 __ext4_fill_super fs/ext4/super.c:5543 [inline]
 ext4_fill_super+0x7fc5/0x8460 fs/ext4/super.c:5652
 get_tree_bdev+0x440/0x680 fs/super.c:1368
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5682
 vfs_get_tree+0x88/0x290 fs/super.c:1575
 do_new_mount+0x2ba/0xb30 fs/namespace.c:3056
 path_mount+0x671/0x1070 fs/namespace.c:3386
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3584
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3584
 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3f86d874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f3f87b01e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3f87b01ef0 RCX: 00007f3f86d874ca
RDX: 0000000020000180 RSI: 00000000200001c0 RDI: 00007f3f87b01eb0
RBP: 0000000020000180 R08: 00007f3f87b01ef0 R09: 0000000000800700
R10: 0000000000800700 R11: 0000000000000246 R12: 00000000200001c0
R13: 00007f3f87b01eb0 R14: 0000000000000455 R15: 00000000200002c0
 </TASK>

Allocated by task 373:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 kmalloc_trace+0x44/0xa0 mm/slab_common.c:1033
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:693 [inline]
 ext4_alloc_sbi fs/ext4/super.c:4265 [inline]
 ext4_fill_super+0x102/0x8460 fs/ext4/super.c:5639
 get_tree_bdev+0x440/0x680 fs/super.c:1368
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5682
 vfs_get_tree+0x88/0x290 fs/super.c:1575
 do_new_mount+0x2ba/0xb30 fs/namespace.c:3056
 path_mount+0x671/0x1070 fs/namespace.c:3386
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3584
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3584
 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 291:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 ext4_put_super+0x9e5/0xd60 fs/ext4/super.c:1313
 generic_shutdown_super+0x14f/0x370 fs/super.c:503
 kill_block_super+0x7e/0xe0 fs/super.c:1472
 deactivate_locked_super+0xad/0x110 fs/super.c:334
 deactivate_super+0xbe/0xf0 fs/super.c:365
 cleanup_mnt+0x485/0x510 fs/namespace.c:1186
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193
 task_work_run+0x24d/0x2e0 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xbd5/0x2b80 kernel/exit.c:877
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 x64_sys_call+0x610/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888114492000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 1216 bytes inside of
 4096-byte region [ffff888114492000, ffff888114493000)

The buggy address belongs to the physical page:
page:ffffea0004512400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114490
head:ffffea0004512400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043380
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 102, tgid 102 (udevd), ts 5508554169, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x2f41/0x2fc0 mm/page_alloc.c:4462
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5759
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:693 [inline]
 uevent_show+0x158/0x330 drivers/base/core.c:2664
 dev_attr_show+0x56/0xd0 drivers/base/core.c:2372
 sysfs_kf_seq_show+0x27c/0x3a0 fs/sysfs/file.c:59
 kernfs_seq_show+0x119/0x160 fs/kernfs/file.c:205
 seq_read_iter+0x430/0xd00 fs/seq_file.c:230
 kernfs_fop_read_iter+0x145/0x470 fs/kernfs/file.c:279
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888114492380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888114492400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888114492480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff888114492500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888114492580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.
EXT4-fs (loop4): unmounting filesystem.