syzkaller login: [ 30.884968] BUG: Bad rss-counter state mm:0000000058072dd6 type:MM_FILEPAGES val:33 [ 30.886109] BUG: Bad rss-counter state mm:0000000058072dd6 type:MM_ANONPAGES val:22 [ 30.930732] ================================================================== [ 30.931750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.932788] Read of size 8 at addr ffff88800d7feb38 by task sshd/220 [ 30.933753] [ 30.933976] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.934925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.935964] Call Trace: [ 30.936361] [ 30.936649] dump_stack_lvl+0x91/0xf0 [ 30.937155] print_report+0xcc/0x620 [ 30.937653] ? __virt_addr_valid+0x102/0x340 [ 30.938284] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.939005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.939685] kasan_report+0xbe/0xf0 [ 30.940247] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.940878] vma_interval_tree_remove+0xc75/0xec0 [ 30.941569] vma_prepare+0xc54/0x11a0 [ 30.942055] __split_vma+0x5af/0x950 [ 30.942567] ? __pfx___split_vma+0x10/0x10 [ 30.943155] ? find_held_lock+0x2c/0x110 [ 30.943771] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.944386] ? lock_is_held_type+0x9f/0x120 [ 30.944942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.945576] ? mtree_range_walk+0x632/0x900 [ 30.946138] ? mas_walk+0x5c7/0x7c0 [ 30.946617] do_vmi_munmap+0x1f1/0x2b0 [ 30.947110] mmap_region+0x1f9/0x2660 [ 30.947598] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.948109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.948836] ? __pfx_lock_acquire+0x10/0x10 [ 30.949390] ? __pfx_mmap_region+0x10/0x10 [ 30.949936] ? security_mmap_addr+0x7d/0xa0 [ 30.950468] ? get_unmapped_area+0x1f5/0x3f0 [ 30.951024] do_mmap+0x854/0xf00 [ 30.951467] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.951968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.952552] ksys_mmap_pgoff+0x3af/0x500 [ 30.953072] do_syscall_64+0x3f/0x90 [ 30.953576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954228] RIP: 0033:0x7ff599b90d82 [ 30.954685] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.956852] RSP: 002b:00007ffcff782a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.957776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff599b90d82 [ 30.958637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff598fca000 [ 30.959517] RBP: 00007ff598fca000 R08: 0000000000000009 R09: 0000000000001000 [ 30.960366] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6b9d29ec0 [ 30.961217] R13: 00007ffcff782a40 R14: 00007ffcff782a70 R15: 00007ffcff782dd0 [ 30.962101] [ 30.962398] [ 30.962616] Allocated by task 213: [ 30.963053] kasan_save_stack+0x22/0x50 [ 30.963563] kasan_set_track+0x25/0x30 [ 30.964060] __kasan_slab_alloc+0x59/0x70 [ 30.964601] kmem_cache_alloc+0x16b/0x370 [ 30.965150] vm_area_dup+0x20/0x160 [ 30.965631] __split_vma+0x170/0x950 [ 30.966114] split_vma+0xc6/0x110 [ 30.966581] mprotect_fixup+0x8d2/0xb30 [ 30.967112] do_mprotect_pkey+0x87e/0xd40 [ 30.967668] __x64_sys_mprotect+0x78/0xc0 [ 30.968225] do_syscall_64+0x3f/0x90 [ 30.968742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.969427] [ 30.969661] Freed by task 213: [ 30.970074] kasan_save_stack+0x22/0x50 [ 30.970606] kasan_set_track+0x25/0x30 [ 30.971129] kasan_save_free_info+0x2b/0x50 [ 30.971700] __kasan_slab_free+0x10a/0x190 [ 30.972274] kmem_cache_free+0x10d/0x4d0 [ 30.972822] rcu_core+0x8c8/0x2860 [ 30.973289] __do_softirq+0x1b7/0x7d4 [ 30.973813] [ 30.974038] Last potentially related work creation: [ 30.974712] kasan_save_stack+0x22/0x50 [ 30.975238] __kasan_record_aux_stack+0x8e/0xa0 [ 30.975841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.976522] remove_vma+0x139/0x170 [ 30.976996] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.977588] do_vmi_munmap+0x1f1/0x2b0 [ 30.978101] __vm_munmap+0x138/0x3a0 [ 30.978599] __x64_sys_munmap+0x59/0x80 [ 30.979125] do_syscall_64+0x3f/0x90 [ 30.979628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980311] [ 30.980538] The buggy address belongs to the object at ffff88800d7feae0 [ 30.980538] which belongs to the cache vm_area_struct of size 168 [ 30.982115] The buggy address is located 88 bytes inside of [ 30.982115] freed 168-byte region [ffff88800d7feae0, ffff88800d7feb88) [ 30.983617] [ 30.983844] The buggy address belongs to the physical page: [ 30.984549] page:00000000f014da1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7fe [ 30.985731] memcg:ffff88800964da01 [ 30.986186] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.986931] page_type: 0xffffffff() [ 30.987413] raw: 0100000000000200 ffff88800879fc80 ffffea00003961c0 dead000000000003 [ 30.988393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800964da01 [ 30.989363] page dumped because: kasan: bad access detected [ 30.990081] [ 30.990309] Memory state around the buggy address: [ 30.990922] ffff88800d7fea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.991829] ffff88800d7fea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.992751] >ffff88800d7feb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.993687] ^ [ 30.994334] ffff88800d7feb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.995253] ffff88800d7fec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.996151] ================================================================== [ 30.997158] Disabling lock debugging due to kernel taint [ 33.845238] BUG: Bad rss-counter state mm:000000007788e8b7 type:MM_FILEPAGES val:33 [ 33.846553] BUG: Bad rss-counter state mm:000000007788e8b7 type:MM_ANONPAGES val:22 [ 34.208524] BUG: Bad rss-counter state mm:0000000095b4c40e type:MM_FILEPAGES val:33 [ 34.209715] BUG: Bad rss-counter state mm:0000000095b4c40e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9222' (ECDSA) to the list of known hosts. 2023/06/20 02:38:00 fuzzer started 2023/06/20 02:38:00 dialing manager at localhost:44161 2023/06/20 02:38:00 checking machine... 2023/06/20 02:38:00 checking revisions... [ 34.944584] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:38:00 testing simple program... [ 34.990483] cgroup: Unknown subsys name 'net' [ 35.054245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:37:59 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000246 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=ffffffff856d8220 RSP=ffff888018077ca8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6780 R13=ffff88800966cd00 R14=0000000000000001 R15=0000000000000dc0 RIP=ffffffff84530004 RFL=00000286 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5ce7a33900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe535aa000 CR3=000000001bf46000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa47cf0b048 CR3=000000000d69c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=c8fe233245ffd4bac5488c35aec4f0c3 XMM02=0000000000121d30eff9b2d0a8fce9cb XMM03=0000000000121e002c67c8bc2e329bc3 XMM04=c5785bba76e7da4700000000000ae988 XMM05=0871376350a93e9600000000001357b0 XMM06=4fda316b135da52b0000000000134850 XMM07=e042d86d42eb936e0000000000125078 XMM08=eaca8704dbf906510000000000121e00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000