[ 41.157357] BUG: Bad rss-counter state mm:00000000ba1852db type:MM_FILEPAGES val:33 [ 41.158544] BUG: Bad rss-counter state mm:00000000ba1852db type:MM_ANONPAGES val:22 [ 41.198046] ================================================================== [ 41.199007] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.199930] Read of size 8 at addr ffff88801012dd08 by task sshd/218 [ 41.200707] [ 41.200926] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.201805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.202791] Call Trace: [ 41.203117] [ 41.203401] dump_stack_lvl+0x91/0xf0 [ 41.203901] print_report+0xcc/0x620 [ 41.204388] ? __virt_addr_valid+0x102/0x340 [ 41.204970] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.205686] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.206368] kasan_report+0xbe/0xf0 [ 41.206897] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.207609] vma_interval_tree_remove+0xc75/0xec0 [ 41.208297] vma_prepare+0xc54/0x11a0 [ 41.208845] __split_vma+0x5af/0x950 [ 41.209393] ? __pfx___split_vma+0x10/0x10 [ 41.210001] ? find_held_lock+0x2c/0x110 [ 41.210590] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.211225] ? lock_is_held_type+0x9f/0x120 [ 41.211840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.212546] ? mtree_range_walk+0x632/0x900 [ 41.213175] ? mas_walk+0x5c7/0x7c0 [ 41.213894] do_vmi_munmap+0x1f1/0x2b0 [ 41.214517] mmap_region+0x1f9/0x2660 [ 41.215108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.215741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.216604] ? __pfx_lock_acquire+0x10/0x10 [ 41.217258] ? __pfx_mmap_region+0x10/0x10 [ 41.217943] ? security_mmap_addr+0x7d/0xa0 [ 41.218589] ? get_unmapped_area+0x1f5/0x3f0 [ 41.219256] do_mmap+0x854/0xf00 [ 41.219794] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.220394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.221074] ksys_mmap_pgoff+0x3af/0x500 [ 41.221709] do_syscall_64+0x3f/0x90 [ 41.222296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.223089] RIP: 0033:0x7f90b20d1d82 [ 41.223768] 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 [ 41.226280] RSP: 002b:00007ffe4a072e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.227177] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90b20d1d82 [ 41.228016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90b150b000 [ 41.228854] RBP: 00007f90b150b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.229701] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9ba605ec0 [ 41.230538] R13: 00007ffe4a072e70 R14: 00007ffe4a072ea0 R15: 00007ffe4a073200 [ 41.231414] [ 41.231706] [ 41.231920] Allocated by task 211: [ 41.232343] kasan_save_stack+0x22/0x50 [ 41.232851] kasan_set_track+0x25/0x30 [ 41.233354] __kasan_slab_alloc+0x59/0x70 [ 41.233876] kmem_cache_alloc+0x16b/0x370 [ 41.234390] vm_area_dup+0x20/0x160 [ 41.234842] __split_vma+0x170/0x950 [ 41.235312] split_vma+0xc6/0x110 [ 41.235753] mprotect_fixup+0x8d2/0xb30 [ 41.236248] do_mprotect_pkey+0x87e/0xd40 [ 41.236768] __x64_sys_mprotect+0x78/0xc0 [ 41.237302] do_syscall_64+0x3f/0x90 [ 41.237781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.238412] [ 41.238626] Freed by task 211: [ 41.239022] kasan_save_stack+0x22/0x50 [ 41.239524] kasan_set_track+0x25/0x30 [ 41.240011] kasan_save_free_info+0x2b/0x50 [ 41.240539] __kasan_slab_free+0x10a/0x190 [ 41.241072] kmem_cache_free+0x10d/0x4d0 [ 41.241583] rcu_core+0x8c8/0x2860 [ 41.242027] __do_softirq+0x1b7/0x7d4 [ 41.242500] [ 41.242714] Last potentially related work creation: [ 41.243295] kasan_save_stack+0x22/0x50 [ 41.243795] __kasan_record_aux_stack+0x8e/0xa0 [ 41.244358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.244998] remove_vma+0x139/0x170 [ 41.245457] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.246006] do_vmi_munmap+0x1f1/0x2b0 [ 41.246484] __vm_munmap+0x138/0x3a0 [ 41.246948] __x64_sys_munmap+0x59/0x80 [ 41.247440] do_syscall_64+0x3f/0x90 [ 41.247910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.248544] [ 41.248757] The buggy address belongs to the object at ffff88801012dcb0 [ 41.248757] which belongs to the cache vm_area_struct of size 168 [ 41.250218] The buggy address is located 88 bytes inside of [ 41.250218] freed 168-byte region [ffff88801012dcb0, ffff88801012dd58) [ 41.251600] [ 41.251814] The buggy address belongs to the physical page: [ 41.252469] page:00000000dc48120d refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801012d658 pfn:0x1012d [ 41.253696] memcg:ffff88800fdda501 [ 41.254121] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.254808] page_type: 0xffffffff() [ 41.255252] raw: 0100000000000200 ffff88800879fc80 ffffea00005adec0 dead000000000007 [ 41.256159] raw: ffff88801012d658 0000000080110009 00000001ffffffff ffff88800fdda501 [ 41.257059] page dumped because: kasan: bad access detected [ 41.257725] [ 41.257939] Memory state around the buggy address: [ 41.258514] ffff88801012dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.259366] ffff88801012dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.260213] >ffff88801012dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.261067] ^ [ 41.261511] ffff88801012dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.262350] ffff88801012de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.263188] ================================================================== [ 41.264340] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.590545] BUG: Bad rss-counter state mm:000000007a78001d type:MM_FILEPAGES val:33 [ 43.591994] BUG: Bad rss-counter state mm:000000007a78001d type:MM_ANONPAGES val:22 [ 44.058737] BUG: Bad rss-counter state mm:0000000069453a9a type:MM_FILEPAGES val:33 [ 44.059899] BUG: Bad rss-counter state mm:0000000069453a9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22893' (ECDSA) to the list of known hosts. 2023/06/19 18:50:43 fuzzer started 2023/06/19 18:50:43 dialing manager at localhost:44161 2023/06/19 18:50:43 checking machine... 2023/06/19 18:50:43 checking revisions... [ 44.802166] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:50:43 testing simple program... [ 44.837620] cgroup: Unknown subsys name 'net' [ 44.880306] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:26 Registers: info registers vcpu 0 RAX=ffffffff83643857 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028fbe6f RSI=ffffffff83643857 RDI=ffff8880147df3e8 RBP=ffff8880147df3b8 RSP=ffff8880147df318 R8 =0000000000000001 R9 =ffff8880147df360 R10=0000000000038001 R11=000000000008ab76 R12=ffff8880147df3e8 R13=0000000000000000 R14=ffff8880147e0000 R15=0000000000000200 RIP=ffffffff84532440 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 00007fa3a15a6900 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=00007fb7a36f6650 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=890e4d0044b7c1d100000000000ae988 XMM05=8c57ec0fd0b1612a0000000000134ca8 XMM06=751b9502027dc0b90000000000133500 XMM07=fb795ef6d65770560000000000123c30 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c764f8 RBX=0000000000000001 RCX=ffffffff863b27c4 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b27c6 RBP=ffff8880161df2b0 RSP=ffff8880161df1e8 R8 =ffffffff863b27c8 R9 =ffff8880161df298 R10=0000000000038001 R11=000000000008ab54 R12=ffff8880161df2b8 R13=ffff8880161df2a0 R14=ffff8880161dfe10 R15=ffff8880161df258 RIP=ffffffff811311c7 RFL=00000213 [----A-C] 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 00007fb7a3141900 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=00007fb7a36f8618 CR3=0000000016e5c000 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=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