syzkaller login: [ 31.229826] BUG: Bad rss-counter state mm:000000006ffa2ca5 type:MM_FILEPAGES val:33 [ 31.231055] BUG: Bad rss-counter state mm:000000006ffa2ca5 type:MM_ANONPAGES val:22 [ 31.270155] ================================================================== [ 31.271245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.272172] Read of size 8 at addr ffff888019e69228 by task sshd/219 [ 31.272975] [ 31.273198] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.274125] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.275156] Call Trace: [ 31.275489] [ 31.275789] dump_stack_lvl+0x91/0xf0 [ 31.276323] print_report+0xcc/0x620 [ 31.276841] ? __virt_addr_valid+0x102/0x340 [ 31.277425] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278750] kasan_report+0xbe/0xf0 [ 31.279248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279887] vma_interval_tree_remove+0xc75/0xec0 [ 31.280500] vma_prepare+0xc54/0x11a0 [ 31.280980] __split_vma+0x5af/0x950 [ 31.281457] ? __pfx___split_vma+0x10/0x10 [ 31.281991] ? find_held_lock+0x2c/0x110 [ 31.282560] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.283153] ? lock_is_held_type+0x9f/0x120 [ 31.283731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.284387] ? mtree_range_walk+0x632/0x900 [ 31.284971] ? mas_walk+0x5c7/0x7c0 [ 31.285543] do_vmi_munmap+0x1f1/0x2b0 [ 31.286179] mmap_region+0x1f9/0x2660 [ 31.286814] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288440] ? __pfx_lock_acquire+0x10/0x10 [ 31.289150] ? __pfx_mmap_region+0x10/0x10 [ 31.289848] ? security_mmap_addr+0x7d/0xa0 [ 31.290550] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291202] do_mmap+0x854/0xf00 [ 31.291652] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292152] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292792] ksys_mmap_pgoff+0x3af/0x500 [ 31.293305] do_syscall_64+0x3f/0x90 [ 31.293791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294648] RIP: 0033:0x7f99c0a21d82 [ 31.295249] 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 [ 31.297836] RSP: 002b:00007ffdd3f459a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.298743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99c0a21d82 [ 31.299608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99bfe5b000 [ 31.300491] RBP: 00007f99bfe5b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.301339] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed08ad3d90 [ 31.302187] R13: 00007ffdd3f459c0 R14: 00007ffdd3f459f0 R15: 00007ffdd3f45d50 [ 31.303071] [ 31.303379] [ 31.303603] Allocated by task 212: [ 31.304052] kasan_save_stack+0x22/0x50 [ 31.304592] kasan_set_track+0x25/0x30 [ 31.305104] __kasan_slab_alloc+0x59/0x70 [ 31.305667] kmem_cache_alloc+0x16b/0x370 [ 31.306218] vm_area_dup+0x20/0x160 [ 31.306698] __split_vma+0x170/0x950 [ 31.307190] split_vma+0xc6/0x110 [ 31.307634] mprotect_fixup+0x8d2/0xb30 [ 31.308154] do_mprotect_pkey+0x87e/0xd40 [ 31.308702] __x64_sys_mprotect+0x78/0xc0 [ 31.309286] do_syscall_64+0x3f/0x90 [ 31.309818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310531] [ 31.310784] Freed by task 212: [ 31.311195] kasan_save_stack+0x22/0x50 [ 31.311721] kasan_set_track+0x25/0x30 [ 31.312245] kasan_save_free_info+0x2b/0x50 [ 31.312818] __kasan_slab_free+0x10a/0x190 [ 31.313373] kmem_cache_free+0x10d/0x4d0 [ 31.313899] rcu_core+0x8c8/0x2860 [ 31.314363] __do_softirq+0x1b7/0x7d4 [ 31.314863] [ 31.315086] Last potentially related work creation: [ 31.315697] kasan_save_stack+0x22/0x50 [ 31.316242] __kasan_record_aux_stack+0x8e/0xa0 [ 31.316902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.317622] remove_vma+0x139/0x170 [ 31.318124] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.318730] do_vmi_munmap+0x1f1/0x2b0 [ 31.319277] __vm_munmap+0x138/0x3a0 [ 31.319793] __x64_sys_munmap+0x59/0x80 [ 31.320351] do_syscall_64+0x3f/0x90 [ 31.320884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321597] [ 31.321827] The buggy address belongs to the object at ffff888019e691d0 [ 31.321827] which belongs to the cache vm_area_struct of size 168 [ 31.323464] The buggy address is located 88 bytes inside of [ 31.323464] freed 168-byte region [ffff888019e691d0, ffff888019e69278) [ 31.324941] [ 31.325165] The buggy address belongs to the physical page: [ 31.325840] page:00000000b63099b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e69 [ 31.326963] memcg:ffff888015e2ca01 [ 31.327406] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.328070] page_type: 0xffffffff() [ 31.328541] raw: 0100000000000200 ffff8880087a0c80 ffffea00006788c0 dead000000000008 [ 31.329542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e2ca01 [ 31.330497] page dumped because: kasan: bad access detected [ 31.331178] [ 31.331402] Memory state around the buggy address: [ 31.332025] ffff888019e69100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.332948] ffff888019e69180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.333862] >ffff888019e69200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.334770] ^ [ 31.335360] ffff888019e69280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.336270] ffff888019e69300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.337197] ================================================================== [ 31.338471] Disabling lock debugging due to kernel taint [ 33.314023] BUG: Bad rss-counter state mm:00000000404b0a21 type:MM_FILEPAGES val:33 [ 33.315279] BUG: Bad rss-counter state mm:00000000404b0a21 type:MM_ANONPAGES val:22 [ 33.781297] BUG: Bad rss-counter state mm:00000000f8ad0cc4 type:MM_FILEPAGES val:33 [ 33.782288] BUG: Bad rss-counter state mm:00000000f8ad0cc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33767' (ECDSA) to the list of known hosts. 2023/06/20 17:16:55 fuzzer started 2023/06/20 17:16:55 dialing manager at localhost:36067 2023/06/20 17:16:55 checking machine... 2023/06/20 17:16:55 checking revisions... [ 34.531464] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:16:55 testing simple program... [ 34.579584] cgroup: Unknown subsys name 'net' [ 34.641824] cgroup: Unknown subsys name 'rlimit' executing program [ 40.107612] BUG: Bad rss-counter state mm:00000000240d1d75 type:MM_FILEPAGES val:187 [ 40.109801] BUG: Bad rss-counter state mm:00000000240d1d75 type:MM_ANONPAGES val:50 [ 40.110934] BUG: non-zero pgtables_bytes on freeing mm: 4096 executing program executing program VM DIAGNOSIS: 17:16:55 Registers: info registers vcpu 0 RAX=ffffffff864bce2c RBX=0000000000000001 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a08 R8 =ffffffff864bcdf6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09af8 R13=ffffffff86055fb8 R14=0000000000000009 R15=dffffc0000000000 RIP=ffffffff8112fcbb RFL=00000286 [--S--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=00007feccf85da50 CR3=000000000c620000 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=4cc3acab33d0ecafb843c8748b76dea9 XMM02=000000000011ba20ec2efd57dc4c00df XMM03=0000000000122760fe7304b022417cef XMM04=ecb55341b28719a100000000000ae988 XMM05=dfcdbad4f1609c370000000000132590 XMM06=6d44817bd84dbc2600000000001313f8 XMM07=e042d86d42eb936e00000000001229e0 XMM08=fe7304b022417cef000000000011ba80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800c6df8d8 RCX=0000000000000001 RDX=1ffff110018dbf31 RSI=ffffffff8363e064 RDI=ffff88800c6df8e4 RBP=ffff88800c6df988 RSP=ffff88800c6df7f0 R8 =0000000000000001 R9 =ffff88800c6df850 R10=0000000000038001 R11=000000000008a88c R12=ffff88800c6df8d8 R13=0000000000000000 R14=ffff888010233680 R15=ffff88801a9f35f0 RIP=ffffffff813ad547 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 00007faa92f4e900 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=00007fff3772b000 CR3=000000000fcce000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000