[ 26.111418] BUG: Bad rss-counter state mm:00000000c86097c1 type:MM_FILEPAGES val:33 [ 26.113265] BUG: Bad rss-counter state mm:00000000c86097c1 type:MM_ANONPAGES val:22 [ 26.273378] ================================================================== [ 26.274239] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.275125] Read of size 8 at addr ffff88801a3844e0 by task sshd/218 [ 26.275850] [ 26.276057] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.276991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.277916] Call Trace: [ 26.278218] [ 26.278488] dump_stack_lvl+0x91/0xf0 [ 26.278949] print_report+0xcc/0x620 [ 26.279407] ? __virt_addr_valid+0x102/0x340 [ 26.279924] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.280543] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.281125] kasan_report+0xbe/0xf0 [ 26.281576] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.282163] vma_interval_tree_remove+0xc75/0xec0 [ 26.282734] vma_prepare+0xc54/0x11a0 [ 26.283189] __split_vma+0x5af/0x950 [ 26.283672] ? __pfx___split_vma+0x10/0x10 [ 26.284298] ? find_held_lock+0x2c/0x110 [ 26.284940] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.285709] ? lock_is_held_type+0x9f/0x120 [ 26.286310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.286952] ? mtree_range_walk+0x632/0x900 [ 26.287539] ? mas_walk+0x5c7/0x7c0 [ 26.288046] do_vmi_munmap+0x1f1/0x2b0 [ 26.288599] mmap_region+0x1f9/0x2660 [ 26.289112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.289656] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.290415] ? __pfx_lock_acquire+0x10/0x10 [ 26.290979] ? __pfx_mmap_region+0x10/0x10 [ 26.291541] ? security_mmap_addr+0x7d/0xa0 [ 26.292103] ? get_unmapped_area+0x1f5/0x3f0 [ 26.292697] do_mmap+0x854/0xf00 [ 26.293117] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.293587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.294123] ksys_mmap_pgoff+0x3af/0x500 [ 26.294645] do_syscall_64+0x3f/0x90 [ 26.295157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.295876] RIP: 0033:0x7f55019c4d82 [ 26.296394] 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 [ 26.298689] RSP: 002b:00007ffc4dddb368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.299669] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55019c4d82 [ 26.300605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5500dfe000 [ 26.301524] RBP: 00007f5500dfe000 R08: 0000000000000009 R09: 0000000000001000 [ 26.302440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b5a7d4ec0 [ 26.303359] R13: 00007ffc4dddb380 R14: 00007ffc4dddb3b0 R15: 00007ffc4dddb710 [ 26.304287] [ 26.304614] [ 26.304850] Allocated by task 211: [ 26.305325] kasan_save_stack+0x22/0x50 [ 26.305871] kasan_set_track+0x25/0x30 [ 26.306415] __kasan_slab_alloc+0x59/0x70 [ 26.306984] kmem_cache_alloc+0x16b/0x370 [ 26.307554] vm_area_dup+0x20/0x160 [ 26.308047] __split_vma+0x170/0x950 [ 26.308577] split_vma+0xc6/0x110 [ 26.309053] mprotect_fixup+0x8d2/0xb30 [ 26.309614] do_mprotect_pkey+0x87e/0xd40 [ 26.310179] __x64_sys_mprotect+0x78/0xc0 [ 26.310755] do_syscall_64+0x3f/0x90 [ 26.311263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.311963] [ 26.312196] Freed by task 211: [ 26.312629] kasan_save_stack+0x22/0x50 [ 26.313168] kasan_set_track+0x25/0x30 [ 26.313707] kasan_save_free_info+0x2b/0x50 [ 26.314300] __kasan_slab_free+0x10a/0x190 [ 26.314879] kmem_cache_free+0x10d/0x4d0 [ 26.315432] rcu_core+0x8c8/0x2860 [ 26.315922] __do_softirq+0x1b7/0x7d4 [ 26.316469] [ 26.316711] Last potentially related work creation: [ 26.317361] kasan_save_stack+0x22/0x50 [ 26.317903] __kasan_record_aux_stack+0x8e/0xa0 [ 26.318537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.319231] remove_vma+0x139/0x170 [ 26.319723] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.320327] do_vmi_munmap+0x1f1/0x2b0 [ 26.320871] __vm_munmap+0x138/0x3a0 [ 26.321387] __x64_sys_munmap+0x59/0x80 [ 26.321931] do_syscall_64+0x3f/0x90 [ 26.322449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.323146] [ 26.323381] The buggy address belongs to the object at ffff88801a384488 [ 26.323381] which belongs to the cache vm_area_struct of size 168 [ 26.324996] The buggy address is located 88 bytes inside of [ 26.324996] freed 168-byte region [ffff88801a384488, ffff88801a384530) [ 26.326518] [ 26.326757] The buggy address belongs to the physical page: [ 26.327487] page:00000000601d04a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a384 [ 26.328702] memcg:ffff888014702c01 [ 26.329151] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.329796] page_type: 0xffffffff() [ 26.330246] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.331162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014702c01 [ 26.332067] page dumped because: kasan: bad access detected [ 26.332740] [ 26.332955] Memory state around the buggy address: [ 26.333525] ffff88801a384380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.334394] ffff88801a384400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 26.335245] >ffff88801a384480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.336097] ^ [ 26.336954] ffff88801a384500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 26.337764] ffff88801a384580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.338577] ================================================================== [ 26.339573] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.426287] BUG: Bad rss-counter state mm:00000000b3b0b443 type:MM_FILEPAGES val:33 [ 28.427399] BUG: Bad rss-counter state mm:00000000b3b0b443 type:MM_ANONPAGES val:22 [ 28.853379] BUG: Bad rss-counter state mm:00000000d6e5cd7c type:MM_FILEPAGES val:33 [ 28.854611] BUG: Bad rss-counter state mm:00000000d6e5cd7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11516' (ECDSA) to the list of known hosts. 2023/06/20 02:32:04 fuzzer started 2023/06/20 02:32:05 dialing manager at localhost:44161 2023/06/20 02:32:05 checking machine... 2023/06/20 02:32:05 checking revisions... [ 29.624517] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:32:05 testing simple program... [ 29.668005] cgroup: Unknown subsys name 'net' [ 29.723505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:32:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800f071b40 RSI=ffffffff81f32412 RDI=ffff888015e1fc68 RBP=0000000000000000 RSP=ffff888015e1fa60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888015e1fc68 R13=0000000000000000 R14=ffff88800f8e3008 R15=dffffc0000000000 RIP=ffffffff814c07f1 RFL=00000293 [--S-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 00007fcb7332c900 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=00007fcb738e3618 CR3=000000000e7ee000 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=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=0000000000000000 RBX=000000000000000f RCX=ffffffff81b2b59f RDX=ffff888015f9d1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888016292a50 RSP=ffff88800d967728 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff88800e07f300 R13=ffff88800e07f364 R14=ffff888016292c48 R15=ffff8880162927dc RIP=ffffffff814c03b8 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 00007f730cfec900 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=00007f730c3e3a70 CR3=000000000c68e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f1197d9cca7ef85600000000000ae988 XMM05=44ba0b3fb362fd5b0000000000134a78 XMM06=71a85fc746bc9c6600000000001331d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000