[ 34.165704] BUG: Bad rss-counter state mm:000000000364a3e9 type:MM_FILEPAGES val:33 [ 34.166916] BUG: Bad rss-counter state mm:000000000364a3e9 type:MM_ANONPAGES val:22 [ 34.315750] ================================================================== [ 34.316670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.317620] Read of size 8 at addr ffff88801a3136b0 by task sshd/219 [ 34.318412] [ 34.318639] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.319595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.320580] Call Trace: [ 34.320920] <TASK> [ 34.321211] dump_stack_lvl+0x91/0xf0 [ 34.321715] print_report+0xcc/0x620 [ 34.322236] ? __virt_addr_valid+0x102/0x340 [ 34.322809] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.323424] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.324045] kasan_report+0xbe/0xf0 [ 34.324527] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.325157] vma_interval_tree_remove+0xc75/0xec0 [ 34.325766] vma_prepare+0xc54/0x11a0 [ 34.326259] __split_vma+0x5af/0x950 [ 34.326738] ? __pfx___split_vma+0x10/0x10 [ 34.327270] ? find_held_lock+0x2c/0x110 [ 34.327801] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.328362] ? lock_is_held_type+0x9f/0x120 [ 34.328902] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.329514] ? mtree_range_walk+0x632/0x900 [ 34.330091] ? mas_walk+0x5c7/0x7c0 [ 34.330564] do_vmi_munmap+0x1f1/0x2b0 [ 34.331060] mmap_region+0x1f9/0x2660 [ 34.331544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.332064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.332791] ? __pfx_lock_acquire+0x10/0x10 [ 34.333323] ? __pfx_mmap_region+0x10/0x10 [ 34.333859] ? security_mmap_addr+0x7d/0xa0 [ 34.334406] ? get_unmapped_area+0x1f5/0x3f0 [ 34.334972] do_mmap+0x854/0xf00 [ 34.335415] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.335913] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.336493] ksys_mmap_pgoff+0x3af/0x500 [ 34.337029] do_syscall_64+0x3f/0x90 [ 34.337501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.338180] RIP: 0033:0x7f0d72f62d82 [ 34.338640] 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 [ 34.340763] RSP: 002b:00007fffe0fdb748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.341678] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d72f62d82 [ 34.342537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d7239c000 [ 34.343391] RBP: 00007f0d7239c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.344240] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645e8f30ec0 [ 34.345081] R13: 00007fffe0fdb760 R14: 00007fffe0fdb790 R15: 00007fffe0fdbaf0 [ 34.345952] </TASK> [ 34.346266] [ 34.346480] Allocated by task 210: [ 34.346908] kasan_save_stack+0x22/0x50 [ 34.347419] kasan_set_track+0x25/0x30 [ 34.347919] __kasan_slab_alloc+0x59/0x70 [ 34.348447] kmem_cache_alloc+0x16b/0x370 [ 34.348964] vm_area_dup+0x20/0x160 [ 34.349420] __split_vma+0x170/0x950 [ 34.349887] split_vma+0xc6/0x110 [ 34.350351] mprotect_fixup+0x8d2/0xb30 [ 34.350858] do_mprotect_pkey+0x87e/0xd40 [ 34.351373] __x64_sys_mprotect+0x78/0xc0 [ 34.351896] do_syscall_64+0x3f/0x90 [ 34.352370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.353020] [ 34.353237] Freed by task 210: [ 34.353629] kasan_save_stack+0x22/0x50 [ 34.354150] kasan_set_track+0x25/0x30 [ 34.354649] kasan_save_free_info+0x2b/0x50 [ 34.355179] __kasan_slab_free+0x10a/0x190 [ 34.355714] kmem_cache_free+0x10d/0x4d0 [ 34.356233] rcu_core+0x8c8/0x2860 [ 34.356675] __do_softirq+0x1b7/0x7d4 [ 34.357147] [ 34.357361] Last potentially related work creation: [ 34.357944] kasan_save_stack+0x22/0x50 [ 34.358465] __kasan_record_aux_stack+0x8e/0xa0 [ 34.359047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.359694] remove_vma+0x139/0x170 [ 34.360154] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.360717] do_vmi_munmap+0x1f1/0x2b0 [ 34.361209] __vm_munmap+0x138/0x3a0 [ 34.361681] __x64_sys_munmap+0x59/0x80 [ 34.362184] do_syscall_64+0x3f/0x90 [ 34.362666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.363313] [ 34.363527] The buggy address belongs to the object at ffff88801a313658 [ 34.363527] which belongs to the cache vm_area_struct of size 168 [ 34.365005] The buggy address is located 88 bytes inside of [ 34.365005] freed 168-byte region [ffff88801a313658, ffff88801a313700) [ 34.366422] [ 34.366637] The buggy address belongs to the physical page: [ 34.367298] page:00000000bdc2985d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a313 [ 34.368392] memcg:ffff88801a2d9d01 [ 34.368822] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.369468] page_type: 0xffffffff() [ 34.369919] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.370858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2d9d01 [ 34.371774] page dumped because: kasan: bad access detected [ 34.372436] [ 34.372655] Memory state around the buggy address: [ 34.373235] ffff88801a313580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.374103] ffff88801a313600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.374959] >ffff88801a313680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.375818] ^ [ 34.376412] ffff88801a313700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.377268] ffff88801a313780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.378127] ================================================================== [ 34.379115] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.207359] BUG: Bad rss-counter state mm:0000000067fd8f9c type:MM_FILEPAGES val:33 [ 36.208606] BUG: Bad rss-counter state mm:0000000067fd8f9c type:MM_ANONPAGES val:22 [ 36.603951] BUG: Bad rss-counter state mm:000000007916d37e type:MM_FILEPAGES val:33 [ 36.605399] BUG: Bad rss-counter state mm:000000007916d37e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23035' (ECDSA) to the list of known hosts. 2023/06/20 07:23:24 fuzzer started 2023/06/20 07:23:24 dialing manager at localhost:44161 2023/06/20 07:23:24 checking machine... 2023/06/20 07:23:24 checking revisions... [ 37.326650] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:23:24 testing simple program... [ 37.365699] cgroup: Unknown subsys name 'net' [ 37.422961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:23:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09bd0 RCX=ffffffff860d68f6 RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce02000 RSP=ffff88806ce09a28 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff81131cac 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 0000000000000000 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=00007ffd1ab78ab8 CR3=0000000014750000 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=33323a3730203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033323a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363338 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbda72 RBX=ffffffff85ded390 RCX=ffffffff816cb48a RDX=0000000000000000 RSI=ffffffff86120330 RDI=ffffffff85ded36c RBP=ffffffff85ded390 RSP=ffff888014697150 R8 =ffffffff86120330 R9 =ffff888014697248 R10=0000000000038001 R11=000000000001cfe6 R12=ffffffff85ded390 R13=ffffffff85ded36c R14=ffffffff85ded38c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f124a5c6900 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=00007fe522518650 CR3=000000000eb3a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3b9995a435fe4c3100000000000ae988 XMM05=9c111537628a53fe00000000001345d0 XMM06=806171799158d9670000000000133050 XMM07=fb795ef6d657705600000000001238d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000