[ 24.180525] BUG: Bad rss-counter state mm:00000000d61e4651 type:MM_FILEPAGES val:33 [ 24.181925] BUG: Bad rss-counter state mm:00000000d61e4651 type:MM_ANONPAGES val:22 [ 24.323627] ================================================================== [ 24.324534] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.325463] Read of size 8 at addr ffff88800c761798 by task sshd/219 [ 24.326221] [ 24.326539] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.327408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.328383] Call Trace: [ 24.328822] [ 24.329167] dump_stack_lvl+0x91/0xf0 [ 24.329741] print_report+0xcc/0x620 [ 24.330304] ? __virt_addr_valid+0x102/0x340 [ 24.330970] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.331695] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.332427] kasan_report+0xbe/0xf0 [ 24.332994] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.333745] vma_interval_tree_remove+0xc75/0xec0 [ 24.334481] vma_prepare+0xc54/0x11a0 [ 24.335072] __split_vma+0x5af/0x950 [ 24.335643] ? __pfx___split_vma+0x10/0x10 [ 24.336285] ? find_held_lock+0x2c/0x110 [ 24.336921] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.337599] ? lock_is_held_type+0x9f/0x120 [ 24.338253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.338986] ? mtree_range_walk+0x632/0x900 [ 24.339535] ? mas_walk+0x5c7/0x7c0 [ 24.340002] do_vmi_munmap+0x1f1/0x2b0 [ 24.340494] mmap_region+0x1f9/0x2660 [ 24.340968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.341482] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.342185] ? __pfx_lock_acquire+0x10/0x10 [ 24.342718] ? __pfx_mmap_region+0x10/0x10 [ 24.343248] ? security_mmap_addr+0x7d/0xa0 [ 24.343776] ? get_unmapped_area+0x1f5/0x3f0 [ 24.344325] do_mmap+0x854/0xf00 [ 24.344758] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.345248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.345799] ksys_mmap_pgoff+0x3af/0x500 [ 24.346310] do_syscall_64+0x3f/0x90 [ 24.346800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.347441] RIP: 0033:0x7f6fb4494d82 [ 24.347894] 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 [ 24.350044] RSP: 002b:00007fff4796f008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.350958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6fb4494d82 [ 24.351792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6fb38ce000 [ 24.352636] RBP: 00007f6fb38ce000 R08: 0000000000000009 R09: 0000000000001000 [ 24.353477] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dddb15eec0 [ 24.354322] R13: 00007fff4796f020 R14: 00007fff4796f050 R15: 00007fff4796f3b0 [ 24.355183] [ 24.355471] [ 24.355681] Allocated by task 210: [ 24.356117] kasan_save_stack+0x22/0x50 [ 24.356616] kasan_set_track+0x25/0x30 [ 24.357104] __kasan_slab_alloc+0x59/0x70 [ 24.357619] kmem_cache_alloc+0x16b/0x370 [ 24.358124] vm_area_dup+0x20/0x160 [ 24.358578] __split_vma+0x170/0x950 [ 24.359056] split_vma+0xc6/0x110 [ 24.359489] mprotect_fixup+0x8d2/0xb30 [ 24.359990] do_mprotect_pkey+0x87e/0xd40 [ 24.360507] __x64_sys_mprotect+0x78/0xc0 [ 24.361020] do_syscall_64+0x3f/0x90 [ 24.361494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.362132] [ 24.362350] Freed by task 210: [ 24.362755] kasan_save_stack+0x22/0x50 [ 24.363254] kasan_set_track+0x25/0x30 [ 24.363739] kasan_save_free_info+0x2b/0x50 [ 24.364262] __kasan_slab_free+0x10a/0x190 [ 24.364785] kmem_cache_free+0x10d/0x4d0 [ 24.365289] rcu_core+0x8c8/0x2860 [ 24.365727] __do_softirq+0x1b7/0x7d4 [ 24.366193] [ 24.366405] Last potentially related work creation: [ 24.366997] kasan_save_stack+0x22/0x50 [ 24.367499] __kasan_record_aux_stack+0x8e/0xa0 [ 24.368067] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.368696] remove_vma+0x139/0x170 [ 24.369139] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.369693] do_vmi_munmap+0x1f1/0x2b0 [ 24.370177] __vm_munmap+0x138/0x3a0 [ 24.370641] __x64_sys_munmap+0x59/0x80 [ 24.371156] do_syscall_64+0x3f/0x90 [ 24.371623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.372263] [ 24.372475] Second to last potentially related work creation: [ 24.373148] kasan_save_stack+0x22/0x50 [ 24.373644] __kasan_record_aux_stack+0x8e/0xa0 [ 24.374209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.374856] remove_vma+0x139/0x170 [ 24.375306] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.375863] do_vmi_munmap+0x1f1/0x2b0 [ 24.376340] mmap_region+0x1f9/0x2660 [ 24.376808] do_mmap+0x854/0xf00 [ 24.377234] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.377725] ksys_mmap_pgoff+0x3af/0x500 [ 24.378221] do_syscall_64+0x3f/0x90 [ 24.378697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.379328] [ 24.379540] The buggy address belongs to the object at ffff88800c761740 [ 24.379540] which belongs to the cache vm_area_struct of size 168 [ 24.380998] The buggy address is located 88 bytes inside of [ 24.380998] freed 168-byte region [ffff88800c761740, ffff88800c7617e8) [ 24.382394] [ 24.382606] The buggy address belongs to the physical page: [ 24.383281] page:000000009a39bf47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc761 [ 24.384348] memcg:ffff88800cf3e801 [ 24.384777] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.385473] page_type: 0xffffffff() [ 24.385920] raw: 0100000000000200 ffff88800879fc80 ffffea0000265980 dead000000000003 [ 24.386843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf3e801 [ 24.387733] page dumped because: kasan: bad access detected [ 24.388392] [ 24.388605] Memory state around the buggy address: [ 24.389183] ffff88800c761680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.390030] ffff88800c761700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.390886] >ffff88800c761780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.391728] ^ [ 24.392222] ffff88800c761800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.393066] ffff88800c761880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.393905] ================================================================== [ 24.394943] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.225379] BUG: Bad rss-counter state mm:00000000a64dce73 type:MM_FILEPAGES val:33 [ 26.226388] BUG: Bad rss-counter state mm:00000000a64dce73 type:MM_ANONPAGES val:22 [ 26.761153] BUG: Bad rss-counter state mm:0000000082e13a97 type:MM_FILEPAGES val:33 [ 26.762549] BUG: Bad rss-counter state mm:0000000082e13a97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5786' (ECDSA) to the list of known hosts. 2023/06/19 15:21:49 fuzzer started 2023/06/19 15:21:50 dialing manager at localhost:44161 2023/06/19 15:21:50 checking machine... 2023/06/19 15:21:50 checking revisions... [ 27.403840] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:21:50 testing simple program... [ 27.451543] cgroup: Unknown subsys name 'net' [ 27.502326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:21:49 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888015b29b40 RSI=ffffffff83ab4224 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015a3f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000089a0000089a R12=0000000000000000 R13=000000000000004f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007f9b0dd53900 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=00007f9b0e30a618 CR3=000000000f64c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f7868dabfb0 CR3=000000000c554000 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=2222a19b1e9ce884094109cf096e78b3 XMM02=ec2efd57dc4c00df000000000011dd50 XMM03=aa1f9123219ffb52000000000011de20 XMM04=05d920afda38baac00000000000ae988 XMM05=dfcdbad4f1609c370000000000134c78 XMM06=b6a366fdca8af74e0000000000133e50 XMM07=e042d86d42eb936e0000000000124318 XMM08=aa1f9123219ffb52000000000011de20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000