syzkaller login: [ 31.185716] BUG: Bad rss-counter state mm:00000000290430c3 type:MM_FILEPAGES val:33 [ 31.186770] BUG: Bad rss-counter state mm:00000000290430c3 type:MM_ANONPAGES val:22 [ 31.360368] ================================================================== [ 31.361335] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.362350] Read of size 8 at addr ffff8880159ac968 by task sshd/219 [ 31.363282] [ 31.363517] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.364441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.365509] Call Trace: [ 31.365849] [ 31.366151] dump_stack_lvl+0x91/0xf0 [ 31.366671] print_report+0xcc/0x620 [ 31.367200] ? __virt_addr_valid+0x102/0x340 [ 31.367786] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.368439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.369093] kasan_report+0xbe/0xf0 [ 31.369606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370270] vma_interval_tree_remove+0xc75/0xec0 [ 31.370921] vma_prepare+0xc54/0x11a0 [ 31.371440] __split_vma+0x5af/0x950 [ 31.371948] ? __pfx___split_vma+0x10/0x10 [ 31.372517] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 31.373205] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.373805] ? lock_is_held_type+0x9f/0x120 [ 31.374383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.375045] ? mtree_range_walk+0x632/0x900 [ 31.375638] ? mas_walk+0x5c7/0x7c0 [ 31.376147] do_vmi_munmap+0x1f1/0x2b0 [ 31.376677] mmap_region+0x1f9/0x2660 [ 31.377196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.377749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.378514] ? __pfx_lock_acquire+0x10/0x10 [ 31.379082] ? __pfx_mmap_region+0x10/0x10 [ 31.379644] ? security_mmap_addr+0x7d/0xa0 [ 31.380219] ? get_unmapped_area+0x1f5/0x3f0 [ 31.380802] do_mmap+0x854/0xf00 [ 31.381274] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.381809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.382413] ksys_mmap_pgoff+0x3af/0x500 [ 31.382973] do_syscall_64+0x3f/0x90 [ 31.383489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384181] RIP: 0033:0x7f10f6934d82 [ 31.384669] 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 [ 31.386974] RSP: 002b:00007ffd9d9a2b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.387943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10f6934d82 [ 31.388843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10f5d6e000 [ 31.389747] RBP: 00007f10f5d6e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.390663] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3aef55ec0 [ 31.391581] R13: 00007ffd9d9a2b40 R14: 00007ffd9d9a2b70 R15: 00007ffd9d9a2ed0 [ 31.392499] [ 31.392815] [ 31.393047] Allocated by task 212: [ 31.393509] kasan_save_stack+0x22/0x50 [ 31.394052] kasan_set_track+0x25/0x30 [ 31.394581] __kasan_slab_alloc+0x59/0x70 [ 31.395155] kmem_cache_alloc+0x16b/0x370 [ 31.395713] vm_area_dup+0x20/0x160 [ 31.396203] __split_vma+0x170/0x950 [ 31.396701] split_vma+0xc6/0x110 [ 31.397174] mprotect_fixup+0x8d2/0xb30 [ 31.397711] do_mprotect_pkey+0x87e/0xd40 [ 31.398274] __x64_sys_mprotect+0x78/0xc0 [ 31.398842] do_syscall_64+0x3f/0x90 [ 31.399356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400044] [ 31.400274] Freed by task 212: [ 31.400699] kasan_save_stack+0x22/0x50 [ 31.401238] kasan_set_track+0x25/0x30 [ 31.401776] kasan_save_free_info+0x2b/0x50 [ 31.402309] __kasan_slab_free+0x10a/0x190 [ 31.402879] kmem_cache_free+0x10d/0x4d0 [ 31.403419] rcu_core+0x8c8/0x2860 [ 31.403901] __do_softirq+0x1b7/0x7d4 [ 31.404395] [ 31.404611] Last potentially related work creation: [ 31.405192] kasan_save_stack+0x22/0x50 [ 31.405697] __kasan_record_aux_stack+0x8e/0xa0 [ 31.406275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.406925] remove_vma+0x139/0x170 [ 31.407382] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.407940] do_vmi_munmap+0x1f1/0x2b0 [ 31.408422] __vm_munmap+0x138/0x3a0 [ 31.408893] __x64_sys_munmap+0x59/0x80 [ 31.409393] do_syscall_64+0x3f/0x90 [ 31.409869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410512] [ 31.410730] The buggy address belongs to the object at ffff8880159ac910 [ 31.410730] which belongs to the cache vm_area_struct of size 168 [ 31.412230] The buggy address is located 88 bytes inside of [ 31.412230] freed 168-byte region [ffff8880159ac910, ffff8880159ac9b8) [ 31.413639] [ 31.413856] The buggy address belongs to the physical page: [ 31.414526] page:000000005d8346a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ac [ 31.415626] memcg:ffff88800c697601 [ 31.416056] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.416709] page_type: 0xffffffff() [ 31.417160] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.418094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c697601 [ 31.419034] page dumped because: kasan: bad access detected [ 31.419698] [ 31.419916] Memory state around the buggy address: [ 31.420505] ffff8880159ac800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.421366] ffff8880159ac880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.422224] >ffff8880159ac900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.423104] ^ [ 31.423885] ffff8880159ac980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.424767] ffff8880159aca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.425632] ================================================================== [ 31.426616] Disabling lock debugging due to kernel taint [ 32.771173] BUG: Bad rss-counter state mm:00000000505a6612 type:MM_FILEPAGES val:33 [ 32.772264] BUG: Bad rss-counter state mm:00000000505a6612 type:MM_ANONPAGES val:22 [ 33.151470] BUG: Bad rss-counter state mm:00000000cf6f09b1 type:MM_FILEPAGES val:33 [ 33.152559] BUG: Bad rss-counter state mm:00000000cf6f09b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32377' (ECDSA) to the list of known hosts. 2023/06/20 21:56:45 fuzzer started 2023/06/20 21:56:45 dialing manager at localhost:36067 2023/06/20 21:56:45 checking machine... 2023/06/20 21:56:45 checking revisions... [ 33.781429] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:56:45 testing simple program... [ 33.833978] cgroup: Unknown subsys name 'net' [ 33.887862] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:56:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff83662309 RCX=0000000000000001 RDX=1ffff11002dc0e80 RSI=ffff888016e07830 RDI=ffffffff83662309 RBP=ffffffff83662309 RSP=ffff888016e07370 R8 =0000000000000001 R9 =ffff888016e073e8 R10=0000000000038001 R11=0000000000020c57 R12=ffff888016e07470 R13=0000000000000000 R14=ffff88800fd8d1c0 R15=0000000000092cc0 RIP=ffffffff811fc7be RFL=00000292 [--S-A--] 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 00007f7bce465900 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=00007fff9d62d000 CR3=000000001cdcc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f14ea7aa8e0 CR3=000000000c594000 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=241dca7f94fc778c174afdf79c423da1 XMM02=0000000000121228ec2efd57dc4c00df XMM03=00000000001237b8f77a6dab0af67b15 XMM04=4d48d7f25587369f00000000000ae988 XMM05=dfcdbad4f1609c370000000000133380 XMM06=0a592e1613a210b60000000000132558 XMM07=e042d86d42eb936e00000000001241f8 XMM08=f77a6dab0af67b150000000000121288 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000