==================================================================
BUG: KASAN: use-after-free in get_kprobe+0xa1/0xc0 kernel/kprobes.c:372
Read of size 8 at addr ffff8880453a5228 by task syz-executor.5/12711

CPU: 1 PID: 12711 Comm: syz-executor.5 Not tainted 5.10.90 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 print_address_description.constprop.0+0x1c/0x210 mm/kasan/report.c:385
 __kasan_report mm/kasan/report.c:545 [inline]
 kasan_report.cold+0x37/0x7c mm/kasan/report.c:562
 get_kprobe+0xa1/0xc0 kernel/kprobes.c:372
 __recover_optprobed_insn+0x31/0x220 arch/x86/kernel/kprobes/opt.c:44
 recover_probed_instruction+0x1c/0xf0 arch/x86/kernel/kprobes/core.c:275
 can_probe+0xc7/0x1b0 arch/x86/kernel/kprobes/core.c:303
 arch_prepare_kprobe+0x79/0x1b0 arch/x86/kernel/kprobes/core.c:499
 prepare_kprobe kernel/kprobes.c:1117 [inline]
 register_kprobe kernel/kprobes.c:1720 [inline]
 register_kprobe+0x9af/0x1330 kernel/kprobes.c:1682
 __register_trace_kprobe kernel/trace/trace_kprobe.c:514 [inline]
 __register_trace_kprobe+0x262/0x2d0 kernel/trace/trace_kprobe.c:482
 create_local_trace_kprobe+0x1e6/0x3b0 kernel/trace/trace_kprobe.c:1837
 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:272
 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9602
 perf_try_init_event+0x130/0x570 kernel/events/core.c:10980
 perf_init_event kernel/events/core.c:11032 [inline]
 perf_event_alloc.part.0+0xd96/0x2b30 kernel/events/core.c:11310
 perf_event_alloc kernel/events/core.c:11689 [inline]
 __do_sys_perf_event_open+0x57c/0x2d00 kernel/events/core.c:11787
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f209cdf1b19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f209a367188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f209cf04f60 RCX: 00007f209cdf1b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020001d80
RBP: 00007f209ce4bf6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffccd96445f R14: 00007f209a367300 R15: 0000000000022000

Allocated by task 12572:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461
 kmalloc_array include/linux/slab.h:592 [inline]
 kcalloc include/linux/slab.h:603 [inline]
 ext4_find_extent+0xa39/0xd20 fs/ext4/extents.c:902
 ext4_swap_extents+0x361/0x14b0 fs/ext4/extents.c:5615
 move_extent_per_page fs/ext4/move_extent.c:360 [inline]
 ext4_move_extents+0x1a49/0x3290 fs/ext4/move_extent.c:673
 __ext4_ioctl+0x305d/0x4180 fs/ext4/ioctl.c:994
 ext4_ioctl+0x46/0x90 fs/ext4/ioctl.c:1328
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x196/0x210 fs/ioctl.c:739
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8880453a5200
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 40 bytes inside of
 192-byte region [ffff8880453a5200, ffff8880453a52c0)
The buggy address belongs to the page:
page:00000000bcfe9ca0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880453a5f00 pfn:0x453a5
flags: 0x100000000000200(slab)
raw: 0100000000000200 ffffea00010962c8 ffffea00005fa0c8 ffff888007c41500
raw: ffff8880453a5f00 0000000000100007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880453a5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880453a5180: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880453a5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff8880453a5280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8880453a5300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
autofs4:pid:12705:autofs_fill_super: called with bogus options
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=12722 comm=syz-executor.3
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=12743 comm=syz-executor.0
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=12754 comm=syz-executor.0
autofs4:pid:12722:autofs_fill_super: called with bogus options