[ 28.206980] BUG: Bad rss-counter state mm:00000000818f5d05 type:MM_FILEPAGES val:33 [ 28.207762] BUG: Bad rss-counter state mm:00000000818f5d05 type:MM_ANONPAGES val:22 [ 28.334652] ================================================================== [ 28.335348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.335977] Read of size 8 at addr ffff88800e31f968 by task sshd/219 [ 28.336486] [ 28.336636] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.337252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.337905] Call Trace: [ 28.338121] [ 28.338304] dump_stack_lvl+0x91/0xf0 [ 28.338622] print_report+0xcc/0x620 [ 28.339164] ? __virt_addr_valid+0x102/0x340 [ 28.339560] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.339960] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.340386] kasan_report+0xbe/0xf0 [ 28.340712] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.341181] vma_interval_tree_remove+0xc75/0xec0 [ 28.341608] vma_prepare+0xc54/0x11a0 [ 28.341930] __split_vma+0x5af/0x950 [ 28.342234] ? __pfx___split_vma+0x10/0x10 [ 28.342588] ? find_held_lock+0x2c/0x110 [ 28.342944] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.343327] ? lock_is_held_type+0x9f/0x120 [ 28.343693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.344117] ? mtree_range_walk+0x632/0x900 [ 28.344505] ? mas_walk+0x5c7/0x7c0 [ 28.344851] do_vmi_munmap+0x1f1/0x2b0 [ 28.345194] mmap_region+0x1f9/0x2660 [ 28.345524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.345861] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.346340] ? __pfx_lock_acquire+0x10/0x10 [ 28.346693] ? __pfx_mmap_region+0x10/0x10 [ 28.347030] ? security_mmap_addr+0x7d/0xa0 [ 28.347377] ? get_unmapped_area+0x1f5/0x3f0 [ 28.347726] do_mmap+0x854/0xf00 [ 28.348011] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.348323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.348680] ksys_mmap_pgoff+0x3af/0x500 [ 28.349071] do_syscall_64+0x3f/0x90 [ 28.349382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.349810] RIP: 0033:0x7f9181497d82 [ 28.350123] 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 [ 28.351549] RSP: 002b:00007ffded8f7218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.352131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9181497d82 [ 28.352716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91808d1000 [ 28.353309] RBP: 00007f91808d1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.353857] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a94a1f5980 [ 28.354429] R13: 00007ffded8f7230 R14: 00007ffded8f7260 R15: 00007ffded8f75c0 [ 28.355015] [ 28.355215] [ 28.355356] Allocated by task 212: [ 28.355647] kasan_save_stack+0x22/0x50 [ 28.355995] kasan_set_track+0x25/0x30 [ 28.356387] __kasan_slab_alloc+0x59/0x70 [ 28.356742] kmem_cache_alloc+0x16b/0x370 [ 28.357158] vm_area_dup+0x20/0x160 [ 28.357466] __split_vma+0x170/0x950 [ 28.357778] split_vma+0xc6/0x110 [ 28.358072] mprotect_fixup+0x8d2/0xb30 [ 28.358453] do_mprotect_pkey+0x87e/0xd40 [ 28.358818] __x64_sys_mprotect+0x78/0xc0 [ 28.359182] do_syscall_64+0x3f/0x90 [ 28.359502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.359979] [ 28.360128] Freed by task 212: [ 28.360410] kasan_save_stack+0x22/0x50 [ 28.360738] kasan_set_track+0x25/0x30 [ 28.361096] kasan_save_free_info+0x2b/0x50 [ 28.361465] __kasan_slab_free+0x10a/0x190 [ 28.361812] kmem_cache_free+0x10d/0x4d0 [ 28.362170] rcu_core+0x8c8/0x2860 [ 28.362486] __do_softirq+0x1b7/0x7d4 [ 28.362826] [ 28.362981] Last potentially related work creation: [ 28.363386] kasan_save_stack+0x22/0x50 [ 28.363738] __kasan_record_aux_stack+0x8e/0xa0 [ 28.364137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.364591] remove_vma+0x139/0x170 [ 28.364988] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.365378] do_vmi_munmap+0x1f1/0x2b0 [ 28.365709] __vm_munmap+0x138/0x3a0 [ 28.366031] __x64_sys_munmap+0x59/0x80 [ 28.366373] do_syscall_64+0x3f/0x90 [ 28.366696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.367130] [ 28.367281] Second to last potentially related work creation: [ 28.367727] kasan_save_stack+0x22/0x50 [ 28.368053] __kasan_record_aux_stack+0x8e/0xa0 [ 28.368441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.368925] remove_vma+0x139/0x170 [ 28.369242] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.369640] do_vmi_munmap+0x1f1/0x2b0 [ 28.369977] mmap_region+0x1f9/0x2660 [ 28.370300] do_mmap+0x854/0xf00 [ 28.370598] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.370945] ksys_mmap_pgoff+0x3af/0x500 [ 28.371298] do_syscall_64+0x3f/0x90 [ 28.371634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.372073] [ 28.372225] The buggy address belongs to the object at ffff88800e31f910 [ 28.372225] which belongs to the cache vm_area_struct of size 168 [ 28.373263] The buggy address is located 88 bytes inside of [ 28.373263] freed 168-byte region [ffff88800e31f910, ffff88800e31f9b8) [ 28.374233] [ 28.374382] The buggy address belongs to the physical page: [ 28.374850] page:00000000a531f40c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe31f [ 28.375591] memcg:ffff88800dff3301 [ 28.375880] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.376380] page_type: 0xffffffff() [ 28.376694] raw: 0100000000000200 ffff88800879fc80 ffffea0000392e40 dead000000000003 [ 28.377390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dff3301 [ 28.378007] page dumped because: kasan: bad access detected [ 28.378479] [ 28.378623] Memory state around the buggy address: [ 28.379023] ffff88800e31f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.379611] ffff88800e31f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.380211] >ffff88800e31f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.380943] ^ [ 28.381471] ffff88800e31f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.382062] ffff88800e31fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.382695] ================================================================== [ 28.383366] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.905806] BUG: Bad rss-counter state mm:00000000543694a8 type:MM_FILEPAGES val:33 [ 29.907045] BUG: Bad rss-counter state mm:00000000543694a8 type:MM_ANONPAGES val:22 [ 30.283497] BUG: Bad rss-counter state mm:000000009432329d type:MM_FILEPAGES val:33 [ 30.284610] BUG: Bad rss-counter state mm:000000009432329d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3565' (ECDSA) to the list of known hosts. 2023/06/20 08:59:19 fuzzer started 2023/06/20 08:59:19 dialing manager at localhost:44161 2023/06/20 08:59:19 checking machine... 2023/06/20 08:59:19 checking revisions... [ 30.887713] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:59:19 testing simple program... [ 30.929423] cgroup: Unknown subsys name 'net' [ 30.994301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:59:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000008000 RCX=ffffffff81b3ba6b RDX=ffff888010288000 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff888015e86a40 RSP=ffff888014677790 R8 =0000000000000003 R9 =0000000000008000 R10=0000000000008000 R11=00000000000b6c88 R12=ffff88801003a100 R13=ffff88800c227850 R14=ffff888015e865c0 R15=ffff8880146778c0 RIP=ffffffff814c07e0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0bf1126900 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=00007f0bf0637b98 CR3=000000000c7f2000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0255e0dbb76cde9400000000000ae988 XMM05=515819cca217c9530000000000134ea8 XMM06=dfcdbad4f1609c370000000000133ca0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff81534376 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806cf09e00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000000200 R15=ffff88806cf3a2d2 RIP=ffffffff8180ef28 RFL=00000083 [--S---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 00007f39c6d7c900 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=00007f39c7333618 CR3=0000000016a16000 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