[ 46.605413] BUG: Bad rss-counter state mm:00000000f568b6cd type:MM_FILEPAGES val:33 [ 46.606876] BUG: Bad rss-counter state mm:00000000f568b6cd type:MM_ANONPAGES val:22 [ 46.756503] ================================================================== [ 46.757644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.758792] Read of size 8 at addr ffff888016c36880 by task sshd/219 [ 46.759903] [ 46.760123] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.760977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.761996] Call Trace: [ 46.762319] [ 46.762599] dump_stack_lvl+0x91/0xf0 [ 46.763082] print_report+0xcc/0x620 [ 46.763566] ? __virt_addr_valid+0x102/0x340 [ 46.764112] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.764728] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.765370] kasan_report+0xbe/0xf0 [ 46.765841] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.766474] vma_interval_tree_remove+0xc75/0xec0 [ 46.767075] vma_prepare+0xc54/0x11a0 [ 46.767558] __split_vma+0x5af/0x950 [ 46.768026] ? __pfx___split_vma+0x10/0x10 [ 46.768557] ? find_held_lock+0x2c/0x110 [ 46.769073] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.769676] ? lock_is_held_type+0x9f/0x120 [ 46.770210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.770807] ? mtree_range_walk+0x632/0x900 [ 46.771351] ? mas_walk+0x5c7/0x7c0 [ 46.771819] do_vmi_munmap+0x1f1/0x2b0 [ 46.772303] mmap_region+0x1f9/0x2660 [ 46.772783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.773330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.774057] ? __pfx_lock_acquire+0x10/0x10 [ 46.774584] ? __pfx_mmap_region+0x10/0x10 [ 46.775109] ? security_mmap_addr+0x7d/0xa0 [ 46.775640] ? get_unmapped_area+0x1f5/0x3f0 [ 46.776191] do_mmap+0x854/0xf00 [ 46.776626] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.777119] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.777709] ksys_mmap_pgoff+0x3af/0x500 [ 46.778214] do_syscall_64+0x3f/0x90 [ 46.778687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.779342] RIP: 0033:0x7fe92c695d82 [ 46.779788] 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 [ 46.781936] RSP: 002b:00007ffffde47968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.782851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe92c695d82 [ 46.783696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe92bacf000 [ 46.784549] RBP: 00007fe92bacf000 R08: 0000000000000009 R09: 0000000000001000 [ 46.785421] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce9b24fd90 [ 46.786278] R13: 00007ffffde47980 R14: 00007ffffde479b0 R15: 00007ffffde47d10 [ 46.787144] [ 46.787434] [ 46.787651] Allocated by task 212: [ 46.788091] kasan_save_stack+0x22/0x50 [ 46.788602] kasan_set_track+0x25/0x30 [ 46.789090] __kasan_slab_alloc+0x59/0x70 [ 46.789639] kmem_cache_alloc+0x16b/0x370 [ 46.790148] vm_area_dup+0x20/0x160 [ 46.790604] __split_vma+0x170/0x950 [ 46.791068] split_vma+0xc6/0x110 [ 46.791510] mprotect_fixup+0x8d2/0xb30 [ 46.792009] do_mprotect_pkey+0x87e/0xd40 [ 46.792530] __x64_sys_mprotect+0x78/0xc0 [ 46.793052] do_syscall_64+0x3f/0x90 [ 46.793564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.794207] [ 46.794427] Freed by task 212: [ 46.794815] kasan_save_stack+0x22/0x50 [ 46.795314] kasan_set_track+0x25/0x30 [ 46.795805] kasan_save_free_info+0x2b/0x50 [ 46.796333] __kasan_slab_free+0x10a/0x190 [ 46.796869] kmem_cache_free+0x10d/0x4d0 [ 46.797403] rcu_core+0x8c8/0x2860 [ 46.797843] __do_softirq+0x1b7/0x7d4 [ 46.798324] [ 46.798544] Last potentially related work creation: [ 46.799125] kasan_save_stack+0x22/0x50 [ 46.799626] __kasan_record_aux_stack+0x8e/0xa0 [ 46.800193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.800912] remove_vma+0x139/0x170 [ 46.801389] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.801938] do_vmi_munmap+0x1f1/0x2b0 [ 46.802422] __vm_munmap+0x138/0x3a0 [ 46.802894] __x64_sys_munmap+0x59/0x80 [ 46.803390] do_syscall_64+0x3f/0x90 [ 46.803863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.804508] [ 46.804727] The buggy address belongs to the object at ffff888016c36828 [ 46.804727] which belongs to the cache vm_area_struct of size 168 [ 46.806227] The buggy address is located 88 bytes inside of [ 46.806227] freed 168-byte region [ffff888016c36828, ffff888016c368d0) [ 46.807617] [ 46.807833] The buggy address belongs to the physical page: [ 46.808491] page:00000000ea67db4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c36 [ 46.809603] memcg:ffff88800c99c301 [ 46.810028] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.810681] page_type: 0xffffffff() [ 46.811130] raw: 0100000000000200 ffff88800879fc80 ffffea0000601d40 000000000000000a [ 46.812035] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c99c301 [ 46.812969] page dumped because: kasan: bad access detected [ 46.813672] [ 46.813891] Memory state around the buggy address: [ 46.814472] ffff888016c36780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.815325] ffff888016c36800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.816179] >ffff888016c36880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.817028] ^ [ 46.817468] ffff888016c36900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.818319] ffff888016c36980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 46.819171] ================================================================== [ 46.820087] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 49.385774] BUG: Bad rss-counter state mm:00000000910d4ced type:MM_FILEPAGES val:33 [ 49.386777] BUG: Bad rss-counter state mm:00000000910d4ced type:MM_ANONPAGES val:22 [ 49.872617] BUG: Bad rss-counter state mm:00000000cd4f885e type:MM_FILEPAGES val:33 [ 49.873662] BUG: Bad rss-counter state mm:00000000cd4f885e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27414' (ECDSA) to the list of known hosts. 2023/06/19 18:04:29 fuzzer started 2023/06/19 18:04:29 dialing manager at localhost:44161 2023/06/19 18:04:29 checking machine... 2023/06/19 18:04:29 checking revisions... [ 50.659741] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:04:29 testing simple program... [ 50.704403] cgroup: Unknown subsys name 'net' [ 50.757136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:04:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c4579c0 RCX=0000000000000001 RDX=1ffff1100188af3a RSI=ffff88800c457f48 RDI=ffff88800c4579d0 RBP=ffff88800c457f48 RSP=ffff88800c457918 R8 =0000000000000001 R9 =ffff88800c457a00 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff88800c450000 R14=ffff88800c457f48 R15=ffff88800c4579c0 RIP=ffffffff81130468 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 00007f6fa3687900 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=00007f6fa3c3c650 CR3=000000000ff10000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84506c7f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028dde4a RSI=ffffffff84506c7f RDI=ffff8880146ef2c0 RBP=ffff8880146ef290 RSP=ffff8880146ef1f0 R8 =0000000000000001 R9 =ffff8880146ef238 R10=0000000000038001 R11=000000000002244e R12=ffff8880146ef2c0 R13=0000000000000000 R14=ffff88801024b680 R15=0000000000092cc0 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f8d8c343900 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=00007f8d8b733ef0 CR3=000000000d884000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6c1441d3fa29701d00000000000ae988 XMM05=5ba2eca758e6d2560000000000134718 XMM06=dfcdbad4f1609c370000000000133240 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000