[ 24.210893] BUG: Bad rss-counter state mm:000000008fcdf8ef type:MM_FILEPAGES val:33 [ 24.211902] BUG: Bad rss-counter state mm:000000008fcdf8ef type:MM_ANONPAGES val:22 [ 24.376937] ================================================================== [ 24.378061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.379141] Read of size 8 at addr ffff888015d32ed8 by task sshd/219 [ 24.379905] [ 24.380135] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.381074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.382323] Call Trace: [ 24.382724] [ 24.383016] dump_stack_lvl+0x91/0xf0 [ 24.383584] print_report+0xcc/0x620 [ 24.384269] ? __virt_addr_valid+0x102/0x340 [ 24.384846] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.385486] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.386113] kasan_report+0xbe/0xf0 [ 24.386585] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.387218] vma_interval_tree_remove+0xc75/0xec0 [ 24.387828] vma_prepare+0xc54/0x11a0 [ 24.388369] __split_vma+0x5af/0x950 [ 24.388963] ? __pfx___split_vma+0x10/0x10 [ 24.389593] ? find_held_lock+0x2c/0x110 [ 24.390231] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.390922] ? lock_is_held_type+0x9f/0x120 [ 24.391568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.392318] ? mtree_range_walk+0x632/0x900 [ 24.393008] ? mas_walk+0x5c7/0x7c0 [ 24.393580] do_vmi_munmap+0x1f1/0x2b0 [ 24.394189] mmap_region+0x1f9/0x2660 [ 24.394756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.395378] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.396256] ? __pfx_lock_acquire+0x10/0x10 [ 24.396917] ? __pfx_mmap_region+0x10/0x10 [ 24.397552] ? security_mmap_addr+0x7d/0xa0 [ 24.398192] ? get_unmapped_area+0x1f5/0x3f0 [ 24.398858] do_mmap+0x854/0xf00 [ 24.399389] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.400029] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.400634] ksys_mmap_pgoff+0x3af/0x500 [ 24.401168] do_syscall_64+0x3f/0x90 [ 24.401644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.402299] RIP: 0033:0x7f66687bbd82 [ 24.402761] 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 [ 24.404941] RSP: 002b:00007ffd3f9fb208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.405853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66687bbd82 [ 24.406748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6667bf5000 [ 24.407687] RBP: 00007f6667bf5000 R08: 0000000000000009 R09: 0000000000001000 [ 24.408589] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f59ac8f60 [ 24.409460] R13: 00007ffd3f9fb220 R14: 00007ffd3f9fb250 R15: 00007ffd3f9fb5b0 [ 24.410339] [ 24.410638] [ 24.410875] Allocated by task 211: [ 24.411319] kasan_save_stack+0x22/0x50 [ 24.411841] kasan_set_track+0x25/0x30 [ 24.412382] __kasan_slab_alloc+0x59/0x70 [ 24.412963] kmem_cache_alloc+0x16b/0x370 [ 24.413484] vm_area_dup+0x20/0x160 [ 24.413960] __split_vma+0x170/0x950 [ 24.414433] split_vma+0xc6/0x110 [ 24.414892] mprotect_fixup+0x8d2/0xb30 [ 24.415405] do_mprotect_pkey+0x87e/0xd40 [ 24.415964] __x64_sys_mprotect+0x78/0xc0 [ 24.416507] do_syscall_64+0x3f/0x90 [ 24.417008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.417660] [ 24.417895] Freed by task 211: [ 24.418288] kasan_save_stack+0x22/0x50 [ 24.418804] kasan_set_track+0x25/0x30 [ 24.419319] kasan_save_free_info+0x2b/0x50 [ 24.419883] __kasan_slab_free+0x10a/0x190 [ 24.420450] kmem_cache_free+0x10d/0x4d0 [ 24.421004] rcu_core+0x8c8/0x2860 [ 24.421449] __do_softirq+0x1b7/0x7d4 [ 24.421942] [ 24.422159] Last potentially related work creation: [ 24.422749] kasan_save_stack+0x22/0x50 [ 24.423279] __kasan_record_aux_stack+0x8e/0xa0 [ 24.423866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.424526] remove_vma+0x139/0x170 [ 24.425008] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.425572] do_vmi_munmap+0x1f1/0x2b0 [ 24.426078] __vm_munmap+0x138/0x3a0 [ 24.426551] __x64_sys_munmap+0x59/0x80 [ 24.427080] do_syscall_64+0x3f/0x90 [ 24.427569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.428250] [ 24.428474] The buggy address belongs to the object at ffff888015d32e80 [ 24.428474] which belongs to the cache vm_area_struct of size 168 [ 24.429996] The buggy address is located 88 bytes inside of [ 24.429996] freed 168-byte region [ffff888015d32e80, ffff888015d32f28) [ 24.431418] [ 24.431638] The buggy address belongs to the physical page: [ 24.432327] page:0000000061f896c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d32 [ 24.433457] memcg:ffff888019ee8501 [ 24.433898] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.434548] page_type: 0xffffffff() [ 24.435016] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.435980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ee8501 [ 24.436916] page dumped because: kasan: bad access detected [ 24.437608] [ 24.437825] Memory state around the buggy address: [ 24.438422] ffff888015d32d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.439293] ffff888015d32e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.440191] >ffff888015d32e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.441063] ^ [ 24.441795] ffff888015d32f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.442674] ffff888015d32f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.443546] ================================================================== [ 24.445256] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.745111] BUG: Bad rss-counter state mm:000000003c14f447 type:MM_FILEPAGES val:33 [ 26.746310] BUG: Bad rss-counter state mm:000000003c14f447 type:MM_ANONPAGES val:22 [ 27.137137] BUG: Bad rss-counter state mm:0000000021ab4eb7 type:MM_FILEPAGES val:33 [ 27.138296] BUG: Bad rss-counter state mm:0000000021ab4eb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35798' (ECDSA) to the list of known hosts. 2023/06/21 10:46:14 fuzzer started 2023/06/21 10:46:14 dialing manager at localhost:36067 2023/06/21 10:46:14 checking machine... 2023/06/21 10:46:14 checking revisions... [ 27.843330] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:46:15 testing simple program... [ 27.896846] cgroup: Unknown subsys name 'net' [ 28.022379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:46:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015e09cd8 RCX=ffffffff8364b276 RDX=1ffff11002bc136c RSI=0000000000000004 RDI=ffff888015e09a68 RBP=0000000000000000 RSP=ffff88800d84f818 R8 =0000000000000000 R9 =ffffed1002bc134d R10=ffff888015e09a6b R11=00000000000b6a61 R12=ffff888015e09800 R13=0000000000000000 R14=ffff888015e09b60 R15=ffff888015e09a74 RIP=ffffffff8364b2cf 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 00007fb44c0ca900 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=00007fb44b5e6048 CR3=000000000db82000 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=00000000000000000000000000000000 XMM01=27f6b97a8bb40dbc1647db7c8d1e6c4a XMM02=0000000000119240d59e07bde36eea69 XMM03=0000000000119368ec2efd57dc4c00df XMM04=474828ef52d232ac00000000000ae988 XMM05=14aecee568996f280000000000130db8 XMM06=161184cd21f78bde000000000012f388 XMM07=fb795ef6d6577056000000000011f938 XMM08=2c67c8bc2e329bc30000000000119368 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8367562f RCX=0000000000000001 RDX=1ffff11003411eb4 RSI=ffff88801a08f910 RDI=ffffffff8367562f RBP=ffffffff8367562f RSP=ffff88801a08f4f8 R8 =0000000000000001 R9 =ffff88801a08f588 R10=0000000000038001 R11=0000000000020d0f R12=0000000000000001 R13=0000000000000000 R14=ffff888015d21b40 R15=0000000000000014 RIP=ffffffff811fc772 RFL=00000283 [--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 00007f151b44b900 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=00007f151ba02618 CR3=0000000019c72000 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=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