[ 31.027536] BUG: Bad rss-counter state mm:00000000c3b00bb5 type:MM_FILEPAGES val:33 [ 31.028511] BUG: Bad rss-counter state mm:00000000c3b00bb5 type:MM_ANONPAGES val:22 [ 31.198949] ================================================================== [ 31.200015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.201246] Read of size 8 at addr ffff88800dc33798 by task sshd/220 [ 31.202117] [ 31.202328] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.203185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.204122] Call Trace: [ 31.204431] [ 31.204708] dump_stack_lvl+0x91/0xf0 [ 31.205189] print_report+0xcc/0x620 [ 31.205663] ? __virt_addr_valid+0x102/0x340 [ 31.206210] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206812] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207406] kasan_report+0xbe/0xf0 [ 31.207874] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208477] vma_interval_tree_remove+0xc75/0xec0 [ 31.209058] vma_prepare+0xc54/0x11a0 [ 31.209521] __split_vma+0x5af/0x950 [ 31.209992] ? __pfx___split_vma+0x10/0x10 [ 31.210509] ? find_held_lock+0x2c/0x110 [ 31.211021] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.211582] ? lock_is_held_type+0x9f/0x120 [ 31.212112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.212698] ? mtree_range_walk+0x632/0x900 [ 31.213237] ? mas_walk+0x5c7/0x7c0 [ 31.213703] do_vmi_munmap+0x1f1/0x2b0 [ 31.214186] mmap_region+0x1f9/0x2660 [ 31.214654] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.215155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.215846] ? __pfx_lock_acquire+0x10/0x10 [ 31.216378] ? __pfx_mmap_region+0x10/0x10 [ 31.216898] ? security_mmap_addr+0x7d/0xa0 [ 31.217409] ? get_unmapped_area+0x1f5/0x3f0 [ 31.217964] do_mmap+0x854/0xf00 [ 31.218397] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.218878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.219427] ksys_mmap_pgoff+0x3af/0x500 [ 31.219920] do_syscall_64+0x3f/0x90 [ 31.220391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221023] RIP: 0033:0x7f3c6a1d3d82 [ 31.221467] 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 [ 31.223540] RSP: 002b:00007fff5c137d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.224419] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c6a1d3d82 [ 31.225237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c6960d000 [ 31.226070] RBP: 00007f3c6960d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.226895] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acdaacbec0 [ 31.227717] R13: 00007fff5c137d30 R14: 00007fff5c137d60 R15: 00007fff5c1380c0 [ 31.228559] [ 31.228842] [ 31.229050] Allocated by task 213: [ 31.229464] kasan_save_stack+0x22/0x50 [ 31.229969] kasan_set_track+0x25/0x30 [ 31.230457] __kasan_slab_alloc+0x59/0x70 [ 31.230970] kmem_cache_alloc+0x16b/0x370 [ 31.231470] vm_area_dup+0x20/0x160 [ 31.231916] __split_vma+0x170/0x950 [ 31.232367] split_vma+0xc6/0x110 [ 31.232797] mprotect_fixup+0x8d2/0xb30 [ 31.233282] do_mprotect_pkey+0x87e/0xd40 [ 31.233792] __x64_sys_mprotect+0x78/0xc0 [ 31.234309] do_syscall_64+0x3f/0x90 [ 31.234772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235398] [ 31.235607] Freed by task 211: [ 31.235987] kasan_save_stack+0x22/0x50 [ 31.236480] kasan_set_track+0x25/0x30 [ 31.236957] kasan_save_free_info+0x2b/0x50 [ 31.237482] __kasan_slab_free+0x10a/0x190 [ 31.238003] kmem_cache_free+0x10d/0x4d0 [ 31.238496] rcu_core+0x8c8/0x2860 [ 31.238926] __do_softirq+0x1b7/0x7d4 [ 31.239389] [ 31.239599] Last potentially related work creation: [ 31.240169] kasan_save_stack+0x22/0x50 [ 31.240663] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241837] remove_vma+0x139/0x170 [ 31.242368] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242912] do_vmi_munmap+0x1f1/0x2b0 [ 31.243385] __vm_munmap+0x138/0x3a0 [ 31.243842] __x64_sys_munmap+0x59/0x80 [ 31.244323] do_syscall_64+0x3f/0x90 [ 31.244797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245425] [ 31.245634] The buggy address belongs to the object at ffff88800dc33740 [ 31.245634] which belongs to the cache vm_area_struct of size 168 [ 31.247061] The buggy address is located 88 bytes inside of [ 31.247061] freed 168-byte region [ffff88800dc33740, ffff88800dc337e8) [ 31.248418] [ 31.248627] The buggy address belongs to the physical page: [ 31.249268] page:000000005e68ba9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc33 [ 31.250346] memcg:ffff88800c5d6f01 [ 31.250761] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251386] page_type: 0xffffffff() [ 31.251825] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.252711] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5d6f01 [ 31.253586] page dumped because: kasan: bad access detected [ 31.254230] [ 31.254439] Memory state around the buggy address: [ 31.255002] ffff88800dc33680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.255830] ffff88800dc33700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.256656] >ffff88800dc33780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.257475] ^ [ 31.257967] ffff88800dc33800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.258800] ffff88800dc33880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.259625] ================================================================== [ 31.260551] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.703718] BUG: Bad rss-counter state mm:00000000ab21e89e type:MM_FILEPAGES val:33 [ 33.704748] BUG: Bad rss-counter state mm:00000000ab21e89e type:MM_ANONPAGES val:22 [ 34.157871] BUG: Bad rss-counter state mm:0000000067b48274 type:MM_FILEPAGES val:33 [ 34.158880] BUG: Bad rss-counter state mm:0000000067b48274 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24060' (ECDSA) to the list of known hosts. 2023/06/21 03:15:28 fuzzer started 2023/06/21 03:15:28 dialing manager at localhost:36067 2023/06/21 03:15:28 checking machine... 2023/06/21 03:15:28 checking revisions... [ 34.817450] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:15:28 testing simple program... [ 34.865791] cgroup: Unknown subsys name 'net' [ 34.945072] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:15:28 Registers: info registers vcpu 0 RAX=ffff888019b20001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019b1fe01 RSI=ffff888019b1fe50 RDI=ffff888019b1f940 RBP=ffff888019b1f988 RSP=ffff888019b1f8c0 R8 =ffffffff861436de R9 =ffff888019b1f970 R10=0000000000038001 R11=00000000000229a3 R12=ffff888019b1f990 R13=ffff888019b1f978 R14=ffff888019b1fe58 R15=ffff888019b1f930 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007f508554a900 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=00007f5085b01618 CR3=0000000019fa2000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f2c205850d0 CR3=000000000efdc000 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=a693131dfc5dba9a8d4cdd5052cbf95a XMM02=000000000011e240ec2efd57dc4c00df XMM03=0000000000121e08f1f40c8b7776ad98 XMM04=2b8557dd510493fa00000000000ae988 XMM05=19e9129bd510f23500000000001319a0 XMM06=7b00cc8ce2ab8d420000000000130b78 XMM07=e042d86d42eb936e00000000001220e0 XMM08=f1f40c8b7776ad98000000000011e2a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000