[ 23.952808] BUG: Bad rss-counter state mm:0000000053b20159 type:MM_FILEPAGES val:33 [ 23.953883] BUG: Bad rss-counter state mm:0000000053b20159 type:MM_ANONPAGES val:22 [ 24.119447] ================================================================== [ 24.120567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.121916] Read of size 8 at addr ffff88801bd1eed8 by task sshd/220 [ 24.122861] [ 24.123126] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.124281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.125472] Call Trace: [ 24.125874] [ 24.126221] dump_stack_lvl+0x91/0xf0 [ 24.126823] print_report+0xcc/0x620 [ 24.127416] ? __virt_addr_valid+0x102/0x340 [ 24.128087] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.128840] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.129590] kasan_report+0xbe/0xf0 [ 24.130186] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.130941] vma_interval_tree_remove+0xc75/0xec0 [ 24.131675] vma_prepare+0xc54/0x11a0 [ 24.132265] __split_vma+0x5af/0x950 [ 24.132841] ? __pfx___split_vma+0x10/0x10 [ 24.133487] ? find_held_lock+0x2c/0x110 [ 24.134145] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.134723] ? lock_is_held_type+0x9f/0x120 [ 24.135277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.135896] ? mtree_range_walk+0x632/0x900 [ 24.136471] ? mas_walk+0x5c7/0x7c0 [ 24.136958] do_vmi_munmap+0x1f1/0x2b0 [ 24.137467] mmap_region+0x1f9/0x2660 [ 24.137977] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.138502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.139243] ? __pfx_lock_acquire+0x10/0x10 [ 24.139801] ? __pfx_mmap_region+0x10/0x10 [ 24.140348] ? security_mmap_addr+0x7d/0xa0 [ 24.140900] ? get_unmapped_area+0x1f5/0x3f0 [ 24.141472] do_mmap+0x854/0xf00 [ 24.141933] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.142451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.143030] ksys_mmap_pgoff+0x3af/0x500 [ 24.143567] do_syscall_64+0x3f/0x90 [ 24.144073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.144762] RIP: 0033:0x7f8ea6015d82 [ 24.145227] 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 [ 24.147474] RSP: 002b:00007fff89733048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.148404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ea6015d82 [ 24.149281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ea544f000 [ 24.150173] RBP: 00007f8ea544f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.151046] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9b2453ec0 [ 24.151939] R13: 00007fff89733060 R14: 00007fff89733090 R15: 00007fff897333f0 [ 24.152830] [ 24.153130] [ 24.153347] Allocated by task 212: [ 24.153781] kasan_save_stack+0x22/0x50 [ 24.154331] kasan_set_track+0x25/0x30 [ 24.154848] __kasan_slab_alloc+0x59/0x70 [ 24.155389] kmem_cache_alloc+0x16b/0x370 [ 24.155934] vm_area_dup+0x20/0x160 [ 24.156407] __split_vma+0x170/0x950 [ 24.156881] split_vma+0xc6/0x110 [ 24.157335] mprotect_fixup+0x8d2/0xb30 [ 24.157855] do_mprotect_pkey+0x87e/0xd40 [ 24.158393] __x64_sys_mprotect+0x78/0xc0 [ 24.158930] do_syscall_64+0x3f/0x90 [ 24.159420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.160086] [ 24.160307] Freed by task 212: [ 24.160720] kasan_save_stack+0x22/0x50 [ 24.161245] kasan_set_track+0x25/0x30 [ 24.161755] kasan_save_free_info+0x2b/0x50 [ 24.162287] __kasan_slab_free+0x10a/0x190 [ 24.162884] kmem_cache_free+0x10d/0x4d0 [ 24.163391] rcu_core+0x8c8/0x2860 [ 24.163835] __do_softirq+0x1b7/0x7d4 [ 24.164314] [ 24.164526] Last potentially related work creation: [ 24.165116] kasan_save_stack+0x22/0x50 [ 24.165625] __kasan_record_aux_stack+0x8e/0xa0 [ 24.166227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.166867] remove_vma+0x139/0x170 [ 24.167318] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.167873] do_vmi_munmap+0x1f1/0x2b0 [ 24.168354] __vm_munmap+0x138/0x3a0 [ 24.168819] __x64_sys_munmap+0x59/0x80 [ 24.169321] do_syscall_64+0x3f/0x90 [ 24.169793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.170451] [ 24.170662] The buggy address belongs to the object at ffff88801bd1ee80 [ 24.170662] which belongs to the cache vm_area_struct of size 168 [ 24.172129] The buggy address is located 88 bytes inside of [ 24.172129] freed 168-byte region [ffff88801bd1ee80, ffff88801bd1ef28) [ 24.173527] [ 24.173741] The buggy address belongs to the physical page: [ 24.174414] page:000000005f70e893 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bd1e [ 24.175508] memcg:ffff88801bcf2c01 [ 24.175931] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.176573] page_type: 0xffffffff() [ 24.177024] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.177974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bcf2c01 [ 24.178880] page dumped because: kasan: bad access detected [ 24.179537] [ 24.179753] Memory state around the buggy address: [ 24.180334] ffff88801bd1ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.181188] ffff88801bd1ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.182050] >ffff88801bd1ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.182898] ^ [ 24.183630] ffff88801bd1ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.184489] ffff88801bd1ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.185349] ================================================================== [ 24.186288] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.155218] BUG: Bad rss-counter state mm:000000002176ab35 type:MM_FILEPAGES val:33 [ 26.156293] BUG: Bad rss-counter state mm:000000002176ab35 type:MM_ANONPAGES val:22 [ 26.673339] BUG: Bad rss-counter state mm:00000000faeb13cd type:MM_FILEPAGES val:33 [ 26.674486] BUG: Bad rss-counter state mm:00000000faeb13cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25585' (ECDSA) to the list of known hosts. 2023/06/20 22:46:39 fuzzer started 2023/06/20 22:46:39 dialing manager at localhost:36067 2023/06/20 22:46:39 checking machine... 2023/06/20 22:46:39 checking revisions... [ 27.399255] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:46:39 testing simple program... [ 27.453651] cgroup: Unknown subsys name 'net' [ 27.503965] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:46:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110033c2f1c RDX=dffffc0000000000 RSI=ffff888019e17858 RDI=ffff888019e17888 RBP=ffff888019e178e0 RSP=ffff888019e177c8 R8 =0000000000000001 R9 =ffff888019e178c8 R10=0000000000038001 R11=0000000000006097 R12=ffff888019e178e8 R13=ffff888019e178d0 R14=ffff888019e178c9 R15=ffff888019e17888 RIP=ffffffff81130706 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 00007f0de12bb900 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=00007ffd68180000 CR3=000000000eb7e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f83063ce390 CR3=000000000bb52000 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=9080698c57e0b0afa94733d4b10c1187 XMM02=000000000011ab60ec2efd57dc4c00df XMM03=00000000001215e0ed4478d7e7b6821e XMM04=241c897f223e4f4900000000000ae988 XMM05=081026286f0705250000000000131f28 XMM06=4fda316b135da52b0000000000130fe0 XMM07=e042d86d42eb936e00000000001218b8 XMM08=ed4478d7e7b6821e000000000011abc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000