syzkaller login: [ 31.205030] BUG: Bad rss-counter state mm:0000000040119d93 type:MM_FILEPAGES val:33 [ 31.206176] BUG: Bad rss-counter state mm:0000000040119d93 type:MM_ANONPAGES val:22 [ 31.362880] ================================================================== [ 31.363793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.364735] Read of size 8 at addr ffff888009706140 by task sshd/220 [ 31.365510] [ 31.365729] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.366809] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.367771] Call Trace: [ 31.368088] [ 31.368371] dump_stack_lvl+0x91/0xf0 [ 31.368913] print_report+0xcc/0x620 [ 31.369400] ? __virt_addr_valid+0x102/0x340 [ 31.369937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370563] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371162] kasan_report+0xbe/0xf0 [ 31.371631] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.372246] vma_interval_tree_remove+0xc75/0xec0 [ 31.372826] vma_prepare+0xc54/0x11a0 [ 31.373298] __split_vma+0x5af/0x950 [ 31.373759] ? __pfx___split_vma+0x10/0x10 [ 31.374300] ? find_held_lock+0x2c/0x110 [ 31.374823] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.375371] ? lock_is_held_type+0x9f/0x120 [ 31.375913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.376509] ? mtree_range_walk+0x632/0x900 [ 31.377043] ? mas_walk+0x5c7/0x7c0 [ 31.377506] do_vmi_munmap+0x1f1/0x2b0 [ 31.377998] mmap_region+0x1f9/0x2660 [ 31.378484] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.378987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.379697] ? __pfx_lock_acquire+0x10/0x10 [ 31.380225] ? __pfx_mmap_region+0x10/0x10 [ 31.380749] ? security_mmap_addr+0x7d/0xa0 [ 31.381273] ? get_unmapped_area+0x1f5/0x3f0 [ 31.381823] do_mmap+0x854/0xf00 [ 31.382282] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.382780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.383338] ksys_mmap_pgoff+0x3af/0x500 [ 31.383837] do_syscall_64+0x3f/0x90 [ 31.384313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384958] RIP: 0033:0x7fd8fb776d82 [ 31.385418] 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 [ 31.387550] RSP: 002b:00007fff81448e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.388450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8fb776d82 [ 31.389294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8fabb0000 [ 31.390134] RBP: 00007fd8fabb0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.390987] R10: 0000000000000812 R11: 0000000000000206 R12: 000056494abbad90 [ 31.391846] R13: 00007fff81448e50 R14: 00007fff81448e80 R15: 00007fff814491e0 [ 31.392787] [ 31.393101] [ 31.393330] Allocated by task 213: [ 31.393777] kasan_save_stack+0x22/0x50 [ 31.394345] kasan_set_track+0x25/0x30 [ 31.394870] __kasan_slab_alloc+0x59/0x70 [ 31.395417] kmem_cache_alloc+0x16b/0x370 [ 31.395941] vm_area_dup+0x20/0x160 [ 31.396396] __split_vma+0x170/0x950 [ 31.396858] split_vma+0xc6/0x110 [ 31.397307] mprotect_fixup+0x8d2/0xb30 [ 31.397805] do_mprotect_pkey+0x87e/0xd40 [ 31.398335] __x64_sys_mprotect+0x78/0xc0 [ 31.398863] do_syscall_64+0x3f/0x90 [ 31.399337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399993] [ 31.400210] Freed by task 213: [ 31.400601] kasan_save_stack+0x22/0x50 [ 31.401103] kasan_set_track+0x25/0x30 [ 31.401599] kasan_save_free_info+0x2b/0x50 [ 31.402127] __kasan_slab_free+0x10a/0x190 [ 31.402678] kmem_cache_free+0x10d/0x4d0 [ 31.403195] rcu_core+0x8c8/0x2860 [ 31.403641] __do_softirq+0x1b7/0x7d4 [ 31.404119] [ 31.404332] Last potentially related work creation: [ 31.404913] kasan_save_stack+0x22/0x50 [ 31.405417] __kasan_record_aux_stack+0x8e/0xa0 [ 31.405989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.406648] remove_vma+0x139/0x170 [ 31.407102] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.407661] do_vmi_munmap+0x1f1/0x2b0 [ 31.408148] __vm_munmap+0x138/0x3a0 [ 31.408648] __x64_sys_munmap+0x59/0x80 [ 31.409162] do_syscall_64+0x3f/0x90 [ 31.409662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410307] [ 31.410527] The buggy address belongs to the object at ffff8880097060e8 [ 31.410527] which belongs to the cache vm_area_struct of size 168 [ 31.412009] The buggy address is located 88 bytes inside of [ 31.412009] freed 168-byte region [ffff8880097060e8, ffff888009706190) [ 31.413391] [ 31.413614] The buggy address belongs to the physical page: [ 31.414291] page:00000000f52e88b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9706 [ 31.415389] memcg:ffff88800e8ba401 [ 31.415814] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.416458] page_type: 0xffffffff() [ 31.416916] raw: 0100000000000200 ffff88800879fc80 ffffea000036dc40 dead000000000006 [ 31.417856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8ba401 [ 31.418786] page dumped because: kasan: bad access detected [ 31.419470] [ 31.419685] Memory state around the buggy address: [ 31.420269] ffff888009706000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.421141] ffff888009706080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.422013] >ffff888009706100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.422920] ^ [ 31.423556] ffff888009706180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.424437] ffff888009706200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.425304] ================================================================== [ 31.426557] Disabling lock debugging due to kernel taint [ 33.602198] BUG: Bad rss-counter state mm:00000000d0876d4f type:MM_FILEPAGES val:33 [ 33.603772] BUG: Bad rss-counter state mm:00000000d0876d4f type:MM_ANONPAGES val:22 [ 34.163636] BUG: Bad rss-counter state mm:000000002b994078 type:MM_FILEPAGES val:33 [ 34.164800] BUG: Bad rss-counter state mm:000000002b994078 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55561' (ECDSA) to the list of known hosts. 2023/06/20 06:15:58 fuzzer started 2023/06/20 06:15:58 dialing manager at localhost:44161 2023/06/20 06:15:58 checking machine... 2023/06/20 06:15:58 checking revisions... [ 34.807813] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:15:58 testing simple program... [ 34.854649] cgroup: Unknown subsys name 'net' [ 34.899224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:15:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00007ffd4ea2ba38 RCX=ffffffff864b9d56 RDX=1ffff11003949e72 RSI=0000000000000000 RDI=ffff88801ca4f390 RBP=00007ffd4ea2cb80 RSP=ffff88801ca4f318 R8 =ffffffff864b9d5a R9 =ffff88801ca4f3c8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801ca4ff58 R13=ffff88801ca4f3d0 R14=ffff88801ca4ff58 R15=ffff88801ca4f388 RIP=ffffffff81131c83 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 00007fbf36cb1900 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=00007fbf37268618 CR3=000000000d0e8000 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=0000000000000001 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=00007f183a261f78 CR3=000000000d868000 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=600399a644a057a759430df6ff7a7912 XMM02=000000000011dc40ec2efd57dc4c00df XMM03=00000000001242a8abd5cccc2c6099bd XMM04=8f3e8531172c7cf400000000000ae988 XMM05=19e9129bd510f2350000000000134110 XMM06=83726e0e2e8fac8f0000000000132f78 XMM07=e042d86d42eb936e0000000000124528 XMM08=abd5cccc2c6099bd000000000011dca0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000