syzkaller login: [ 30.138784] BUG: Bad rss-counter state mm:000000000db903a2 type:MM_FILEPAGES val:33 [ 30.139473] BUG: Bad rss-counter state mm:000000000db903a2 type:MM_ANONPAGES val:22 [ 30.336613] ================================================================== [ 30.337303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.338827] Read of size 8 at addr ffff8880141e1ed8 by task sshd/221 [ 30.340334] [ 30.340717] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.342555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.344602] Call Trace: [ 30.345199] [ 30.350461] dump_stack_lvl+0x91/0xf0 [ 30.351363] print_report+0xcc/0x620 [ 30.352300] ? __virt_addr_valid+0x102/0x340 [ 30.353359] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.354540] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355741] kasan_report+0xbe/0xf0 [ 30.356640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.357922] vma_interval_tree_remove+0xc75/0xec0 [ 30.359060] vma_prepare+0xc54/0x11a0 [ 30.359994] __split_vma+0x5af/0x950 [ 30.360921] ? __pfx___split_vma+0x10/0x10 [ 30.361934] ? find_held_lock+0x2c/0x110 [ 30.362934] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.364079] ? lock_is_held_type+0x9f/0x120 [ 30.365072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.366260] ? mtree_range_walk+0x632/0x900 [ 30.367378] ? mas_walk+0x5c7/0x7c0 [ 30.368292] do_vmi_munmap+0x1f1/0x2b0 [ 30.369272] mmap_region+0x1f9/0x2660 [ 30.370344] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.371394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.372840] ? __pfx_lock_acquire+0x10/0x10 [ 30.373956] ? __pfx_mmap_region+0x10/0x10 [ 30.375036] ? security_mmap_addr+0x7d/0xa0 [ 30.376127] ? get_unmapped_area+0x1f5/0x3f0 [ 30.377285] do_mmap+0x854/0xf00 [ 30.378186] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.379193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.380330] ksys_mmap_pgoff+0x3af/0x500 [ 30.381375] do_syscall_64+0x3f/0x90 [ 30.382467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383766] RIP: 0033:0x7f0afca9dd82 [ 30.384718] 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 [ 30.389393] RSP: 002b:00007ffec1fb4268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.391271] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0afca9dd82 [ 30.393146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0afbed7000 [ 30.395043] RBP: 00007f0afbed7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.396930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a525f30ec0 [ 30.398758] R13: 00007ffec1fb4280 R14: 00007ffec1fb42b0 R15: 00007ffec1fb4610 [ 30.400611] [ 30.401201] [ 30.401669] Allocated by task 213: [ 30.402530] kasan_save_stack+0x22/0x50 [ 30.403567] kasan_set_track+0x25/0x30 [ 30.404586] __kasan_slab_alloc+0x59/0x70 [ 30.405637] kmem_cache_alloc+0x16b/0x370 [ 30.406692] vm_area_dup+0x20/0x160 [ 30.407646] __split_vma+0x170/0x950 [ 30.408595] split_vma+0xc6/0x110 [ 30.409515] mprotect_fixup+0x8d2/0xb30 [ 30.410459] do_mprotect_pkey+0x87e/0xd40 [ 30.411509] __x64_sys_mprotect+0x78/0xc0 [ 30.412588] do_syscall_64+0x3f/0x90 [ 30.413513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.414827] [ 30.415222] Freed by task 204: [ 30.416056] kasan_save_stack+0x22/0x50 [ 30.417053] kasan_set_track+0x25/0x30 [ 30.418045] kasan_save_free_info+0x2b/0x50 [ 30.419141] __kasan_slab_free+0x10a/0x190 [ 30.420227] kmem_cache_free+0x10d/0x4d0 [ 30.421267] rcu_core+0x8c8/0x2860 [ 30.422162] __do_softirq+0x1b7/0x7d4 [ 30.423133] [ 30.423589] Last potentially related work creation: [ 30.424795] kasan_save_stack+0x22/0x50 [ 30.425835] __kasan_record_aux_stack+0x8e/0xa0 [ 30.427039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.428357] remove_vma+0x139/0x170 [ 30.429291] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.430455] do_vmi_munmap+0x1f1/0x2b0 [ 30.431423] __vm_munmap+0x138/0x3a0 [ 30.432350] __x64_sys_munmap+0x59/0x80 [ 30.433360] do_syscall_64+0x3f/0x90 [ 30.434297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.435639] [ 30.436032] The buggy address belongs to the object at ffff8880141e1e80 [ 30.436032] which belongs to the cache vm_area_struct of size 168 [ 30.439170] The buggy address is located 88 bytes inside of [ 30.439170] freed 168-byte region [ffff8880141e1e80, ffff8880141e1f28) [ 30.442153] [ 30.442576] The buggy address belongs to the physical page: [ 30.444000] page:0000000075d3648a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141e1 [ 30.446353] memcg:ffff88800c599601 [ 30.447192] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.448473] page_type: 0xffffffff() [ 30.449360] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5780 dead000000000004 [ 30.451322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c599601 [ 30.453256] page dumped because: kasan: bad access detected [ 30.454691] [ 30.455094] Memory state around the buggy address: [ 30.456353] ffff8880141e1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.458218] ffff8880141e1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.460043] >ffff8880141e1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.465727] ^ [ 30.466198] ffff8880141e1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.466747] ffff8880141e1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.467298] ================================================================== [ 30.468105] Disabling lock debugging due to kernel taint [ 34.187718] BUG: Bad rss-counter state mm:000000009d6759c6 type:MM_FILEPAGES val:33 [ 34.188395] BUG: Bad rss-counter state mm:000000009d6759c6 type:MM_ANONPAGES val:22 [ 35.037877] BUG: Bad rss-counter state mm:0000000071a69d82 type:MM_FILEPAGES val:33 [ 35.038528] BUG: Bad rss-counter state mm:0000000071a69d82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59284' (ECDSA) to the list of known hosts. 2023/06/21 09:59:07 fuzzer started 2023/06/21 09:59:07 dialing manager at localhost:36067 2023/06/21 09:59:07 checking machine... 2023/06/21 09:59:07 checking revisions... [ 36.120588] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:59:08 testing simple program... [ 36.171538] cgroup: Unknown subsys name 'net' [ 36.233581] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:59:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800c63f510 RSP=ffff88800c63f448 R8 =ffffffff86138eb4 R9 =ffff88800c63f4f8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800c63f518 R13=ffff88800c63f500 R14=0000000000000005 R15=ffff88800c63f4b8 RIP=ffffffff81130b3f RFL=00000246 [---Z-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 00007fbe71509900 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=00007f6aad980328 CR3=000000000e638000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138e91 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c271d2 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff86138e90 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37cc8 R15=ffff888008e37978 RIP=ffffffff81131127 RFL=00000216 [----AP-] 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 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=00007f0aeb8a9000 CR3=000000000d65c000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=a48345ebf7e5a7dc0000000000132d60 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=378e0e966ac112b400000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000