==================================================================
BUG: KASAN: slab-out-of-bounds in hlist_add_head include/linux/list.h:814 [inline]
BUG: KASAN: slab-out-of-bounds in enqueue_timer+0xb7/0x300 kernel/time/timer.c:541
Write of size 8 at addr ffff8881e39ab1c8 by task syz.1.619/1934

CPU: 0 PID: 1934 Comm: syz.1.619 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 hlist_add_head include/linux/list.h:814 [inline]
 enqueue_timer+0xb7/0x300 kernel/time/timer.c:541
 __internal_add_timer kernel/time/timer.c:554 [inline]
 internal_add_timer+0x240/0x430 kernel/time/timer.c:604
 __mod_timer+0x6f1/0x13e0 kernel/time/timer.c:1065
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:538 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:check_kcov_mode kernel/kcov.c:164 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:187
Code: 90 90 90 90 90 90 90 90 48 8b 04 24 65 48 8b 0d 54 51 9e 7e 65 8b 15 59 51 9e 7e f7 c2 00 01 1f 00 74 01 c3 8b 91 00 0a 00 00 <83> fa 02 75 f4 48 8b 91 08 0a 00 00 48 8b 32 48 8d 7e 01 8b 89 04
RSP: 0018:ffff8881d56e7100 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff844badf0 RBX: 0000000006f16c1f RCX: ffff8881e19e5e80
RDX: 0000000000000002 RSI: 00000000fb7bbf30 RDI: 0000000062fdb723
RBP: 00000000fb7bbf30 R08: ffff8881d56e7280 R09: 000000005a11a7fe
R10: 0000000050f8e048 R11: 00000000faa80001 R12: 0000000000000022
R13: 0000000062fdb723 R14: 000000005422bee1 R15: 0000000042f496ee
 sha_transform+0x540/0x1350 lib/sha1.c:104
 bpf_prog_calc_tag+0x50a/0x8f0 kernel/bpf/core.c:327
 replace_map_fd_with_map_ptr kernel/bpf/verifier.c:8218 [inline]
 bpf_check+0x912/0xb340 kernel/bpf/verifier.c:9608
 bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f1818b96b29
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:00007f1817e18048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f1818d24fa0 RCX: 00007f1818b96b29
RDX: 0000000000000080 RSI: 0000000020000600 RDI: 0000000000000005
RBP: 00007f1818c17756 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1818d24fa0 R15: 00007fffca334b08

Allocated by task 1876:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 kmalloc_array include/linux/slab.h:618 [inline]
 realloc_stack_state kernel/bpf/verifier.c:595 [inline]
 realloc_func_state+0x2ee/0x5a0 kernel/bpf/verifier.c:611
 copy_func_state kernel/bpf/verifier.c:704 [inline]
 copy_verifier_state+0x655/0xbf0 kernel/bpf/verifier.c:751
 push_stack+0x153/0x470 kernel/bpf/verifier.c:819
 check_cond_jmp_op+0x719/0x17d0 kernel/bpf/verifier.c:6192
 do_check+0x4ba1/0x9820 kernel/bpf/verifier.c:8109
 bpf_check+0x2169/0xb340 kernel/bpf/verifier.c:9637
 bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 1876:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook mm/slub.c:1494 [inline]
 slab_free mm/slub.c:3080 [inline]
 kfree+0x123/0x370 mm/slub.c:4071
 free_func_state kernel/bpf/verifier.c:671 [inline]
 free_verifier_state+0xd6/0x230 kernel/bpf/verifier.c:688
 pop_stack kernel/bpf/verifier.c:795 [inline]
 do_check+0x6c84/0x9820 kernel/bpf/verifier.c:8098
 bpf_check+0x2169/0xb340 kernel/bpf/verifier.c:9637
 bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the object at ffff8881e39ab000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes to the right of
 256-byte region [ffff8881e39ab000, ffff8881e39ab100)
The buggy address belongs to the page:
page:ffffea00078e6a80 refcount:1 mapcount:0 mapping:ffff8881f5c02780 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c02780
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
 alloc_slab_page+0x39/0x3c0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x440 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x2fe/0x490 mm/slub.c:2667
 __slab_alloc+0x62/0xa0 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 __kmalloc+0x19b/0x2e0 mm/slub.c:3909
 kmalloc include/linux/slab.h:561 [inline]
 copy_verifier_state+0xc1/0xbf0 kernel/bpf/verifier.c:724
 is_state_visited kernel/bpf/verifier.c:7702 [inline]
 do_check+0x3286/0x9820 kernel/bpf/verifier.c:7837
 bpf_check+0x2169/0xb340 kernel/bpf/verifier.c:9637
 bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0x847/0x950 mm/page_alloc.c:1438
 free_the_page mm/page_alloc.c:4955 [inline]
 __free_pages+0x91/0x140 mm/page_alloc.c:4961
 htab_free_elems kernel/bpf/hashtab.c:116 [inline]
 prealloc_destroy kernel/bpf/hashtab.c:194 [inline]
 htab_map_free+0x515/0x670 kernel/bpf/hashtab.c:1235
 bpf_map_free_deferred+0xa8/0x100 kernel/bpf/syscall.c:311
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Memory state around the buggy address:
 ffff8881e39ab080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e39ab100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881e39ab180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff8881e39ab200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e39ab280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1da20c067 P4D 1da20c067 PUD 1ed0b9067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1934 Comm: syz.1.619 Tainted: G    B             5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881e19e5e80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e39ab1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa120
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e39ab1c0
FS:  00007f1817e186c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001da724000 CR4: 00000000003406b0
DR0: 0000000020000240 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:538 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:check_kcov_mode kernel/kcov.c:164 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:187
Code: 90 90 90 90 90 90 90 90 48 8b 04 24 65 48 8b 0d 54 51 9e 7e 65 8b 15 59 51 9e 7e f7 c2 00 01 1f 00 74 01 c3 8b 91 00 0a 00 00 <83> fa 02 75 f4 48 8b 91 08 0a 00 00 48 8b 32 48 8d 7e 01 8b 89 04
RSP: 0018:ffff8881d56e7100 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff844badf0 RBX: 0000000006f16c1f RCX: ffff8881e19e5e80
RDX: 0000000000000002 RSI: 00000000fb7bbf30 RDI: 0000000062fdb723
RBP: 00000000fb7bbf30 R08: ffff8881d56e7280 R09: 000000005a11a7fe
R10: 0000000050f8e048 R11: 00000000faa80001 R12: 0000000000000022
R13: 0000000062fdb723 R14: 000000005422bee1 R15: 0000000042f496ee
 sha_transform+0x540/0x1350 lib/sha1.c:104
 bpf_prog_calc_tag+0x50a/0x8f0 kernel/bpf/core.c:327
 replace_map_fd_with_map_ptr kernel/bpf/verifier.c:8218 [inline]
 bpf_check+0x912/0xb340 kernel/bpf/verifier.c:9608
 bpf_prog_load kernel/bpf/syscall.c:1724 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x8139/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f1818b96b29
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:00007f1817e18048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f1818d24fa0 RCX: 00007f1818b96b29
RDX: 0000000000000080 RSI: 0000000020000600 RDI: 0000000000000005
RBP: 00007f1818c17756 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1818d24fa0 R15: 00007fffca334b08
Modules linked in:
CR2: 0000000000000000
---[ end trace 33cbc211d48095fb ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881e19e5e80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881e39ab1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffffa120
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e39ab1c0
FS:  00007f1817e186c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001da724000 CR4: 00000000003406b0
DR0: 0000000020000240 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	48 8b 04 24          	mov    (%rsp),%rax
   c:	65 48 8b 0d 54 51 9e 	mov    %gs:0x7e9e5154(%rip),%rcx        # 0x7e9e5168
  13:	7e
  14:	65 8b 15 59 51 9e 7e 	mov    %gs:0x7e9e5159(%rip),%edx        # 0x7e9e5174
  1b:	f7 c2 00 01 1f 00    	test   $0x1f0100,%edx
  21:	74 01                	je     0x24
  23:	c3                   	ret
  24:	8b 91 00 0a 00 00    	mov    0xa00(%rcx),%edx
* 2a:	83 fa 02             	cmp    $0x2,%edx <-- trapping instruction
  2d:	75 f4                	jne    0x23
  2f:	48 8b 91 08 0a 00 00 	mov    0xa08(%rcx),%rdx
  36:	48 8b 32             	mov    (%rdx),%rsi
  39:	48 8d 7e 01          	lea    0x1(%rsi),%rdi
  3d:	8b                   	.byte 0x8b
  3e:	89                   	.byte 0x89
  3f:	04                   	.byte 0x4