syzkaller login: [ 30.643056] BUG: Bad rss-counter state mm:00000000d14603bc type:MM_FILEPAGES val:33 [ 30.644157] BUG: Bad rss-counter state mm:00000000d14603bc type:MM_ANONPAGES val:22 [ 30.811858] ================================================================== [ 30.812772] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813706] Read of size 8 at addr ffff88801032f880 by task sshd/220 [ 30.814462] [ 30.814682] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816620] Call Trace: [ 30.816940] [ 30.817223] dump_stack_lvl+0x91/0xf0 [ 30.817723] print_report+0xcc/0x620 [ 30.818212] ? __virt_addr_valid+0x102/0x340 [ 30.818757] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819378] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820022] kasan_report+0xbe/0xf0 [ 30.820492] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821119] vma_interval_tree_remove+0xc75/0xec0 [ 30.821716] vma_prepare+0xc54/0x11a0 [ 30.822189] __split_vma+0x5af/0x950 [ 30.822657] ? __pfx___split_vma+0x10/0x10 [ 30.823181] ? find_held_lock+0x2c/0x110 [ 30.823706] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824264] ? lock_is_held_type+0x9f/0x120 [ 30.824797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.825394] ? mtree_range_walk+0x632/0x900 [ 30.825940] ? mas_walk+0x5c7/0x7c0 [ 30.826416] do_vmi_munmap+0x1f1/0x2b0 [ 30.826910] mmap_region+0x1f9/0x2660 [ 30.827388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.827909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.828621] ? __pfx_lock_acquire+0x10/0x10 [ 30.829148] ? __pfx_mmap_region+0x10/0x10 [ 30.829680] ? security_mmap_addr+0x7d/0xa0 [ 30.830208] ? get_unmapped_area+0x1f5/0x3f0 [ 30.830756] do_mmap+0x854/0xf00 [ 30.831190] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.831695] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832252] ksys_mmap_pgoff+0x3af/0x500 [ 30.832753] do_syscall_64+0x3f/0x90 [ 30.833227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833870] RIP: 0033:0x7ff886643d82 [ 30.834318] 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 [ 30.836414] RSP: 002b:00007ffe13710c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff886643d82 [ 30.838156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff885a7d000 [ 30.838990] RBP: 00007ff885a7d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839834] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a2f428ec0 [ 30.840665] R13: 00007ffe13710cb0 R14: 00007ffe13710ce0 R15: 00007ffe13711040 [ 30.841505] [ 30.841792] [ 30.842004] Allocated by task 213: [ 30.842431] kasan_save_stack+0x22/0x50 [ 30.842933] kasan_set_track+0x25/0x30 [ 30.843425] __kasan_slab_alloc+0x59/0x70 [ 30.843970] kmem_cache_alloc+0x16b/0x370 [ 30.844488] vm_area_dup+0x20/0x160 [ 30.844943] __split_vma+0x170/0x950 [ 30.845408] split_vma+0xc6/0x110 [ 30.845849] mprotect_fixup+0x8d2/0xb30 [ 30.846343] do_mprotect_pkey+0x87e/0xd40 [ 30.846866] __x64_sys_mprotect+0x78/0xc0 [ 30.847378] do_syscall_64+0x3f/0x90 [ 30.847869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848522] [ 30.848745] Freed by task 213: [ 30.849133] kasan_save_stack+0x22/0x50 [ 30.849642] kasan_set_track+0x25/0x30 [ 30.850132] kasan_save_free_info+0x2b/0x50 [ 30.850672] __kasan_slab_free+0x10a/0x190 [ 30.851206] kmem_cache_free+0x10d/0x4d0 [ 30.851721] rcu_core+0x8c8/0x2860 [ 30.852171] __do_softirq+0x1b7/0x7d4 [ 30.852666] [ 30.852882] Last potentially related work creation: [ 30.853467] kasan_save_stack+0x22/0x50 [ 30.853972] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855188] remove_vma+0x139/0x170 [ 30.855661] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856218] do_vmi_munmap+0x1f1/0x2b0 [ 30.856703] __vm_munmap+0x138/0x3a0 [ 30.857176] __x64_sys_munmap+0x59/0x80 [ 30.857669] do_syscall_64+0x3f/0x90 [ 30.858140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858785] [ 30.858998] The buggy address belongs to the object at ffff88801032f828 [ 30.858998] which belongs to the cache vm_area_struct of size 168 [ 30.860475] The buggy address is located 88 bytes inside of [ 30.860475] freed 168-byte region [ffff88801032f828, ffff88801032f8d0) [ 30.861866] [ 30.862080] The buggy address belongs to the physical page: [ 30.862735] page:00000000d6dbc72c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1032f [ 30.863852] memcg:ffff888013f15301 [ 30.864281] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.864925] page_type: 0xffffffff() [ 30.865375] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.866281] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f15301 [ 30.867186] page dumped because: kasan: bad access detected [ 30.867871] [ 30.868085] Memory state around the buggy address: [ 30.868660] ffff88801032f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.869519] ffff88801032f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.870375] >ffff88801032f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.871216] ^ [ 30.871633] ffff88801032f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.872477] ffff88801032f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.873325] ================================================================== [ 30.874289] Disabling lock debugging due to kernel taint [ 33.100497] BUG: Bad rss-counter state mm:0000000011f645a2 type:MM_FILEPAGES val:33 [ 33.101311] BUG: Bad rss-counter state mm:0000000011f645a2 type:MM_ANONPAGES val:22 [ 33.542162] BUG: Bad rss-counter state mm:000000009358b125 type:MM_FILEPAGES val:33 [ 33.543243] BUG: Bad rss-counter state mm:000000009358b125 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38263' (ECDSA) to the list of known hosts. 2023/06/20 13:04:08 fuzzer started 2023/06/20 13:04:08 dialing manager at localhost:36067 2023/06/20 13:04:08 checking machine... 2023/06/20 13:04:08 checking revisions... [ 34.295447] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:04:08 testing simple program... [ 34.345646] cgroup: Unknown subsys name 'net' [ 34.390528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:04:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888014697db8 RSI=ffff888014697d80 RDI=ffff888014697aa0 RBP=ffff888014690000 RSP=ffff888014697a60 R8 =0000000000000001 R9 =ffff888014697ad0 R10=0000000000038001 R11=0000000000023548 R12=ffff888014697af0 R13=ffff888014697ad8 R14=ffff888014697d80 R15=ffff888014697a90 RIP=ffffffff81130930 RFL=00000282 [--S----] 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 00007f80f3bb7900 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=00007f80f2ff1350 CR3=000000000c9c4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9d2154c4e4d548eb00000000000ae988 XMM05=0bd450761087f2810000000000132010 XMM06=19e9129bd510f2350000000000131178 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800947eb40 RBX=1ffff11001e5af66 RCX=0000000000000000 RDX=0000000000000280 RSI=ffff888009d88600 RDI=ffff88800947eb40 RBP=0000000000000000 RSP=ffff88800f2d7b08 R8 =ffff88800f2d7aa0 R9 =0000000000000000 R10=ffff88800947eb40 R11=00000000000b6a61 R12=ffff88800947eb40 R13=ffff888009d88600 R14=0000000000000cc0 R15=ffff888008fae000 RIP=ffffffff83669f88 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 00007f79f49c4900 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=00007ffc380b8000 CR3=000000000c7ce000 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=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