syzkaller login: [ 31.077144] BUG: Bad rss-counter state mm:0000000048dfb98f type:MM_FILEPAGES val:33 [ 31.078185] BUG: Bad rss-counter state mm:0000000048dfb98f type:MM_ANONPAGES val:22 [ 31.252036] ================================================================== [ 31.252951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.253932] Read of size 8 at addr ffff88800cbbd3f8 by task sshd/219 [ 31.254733] [ 31.255078] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.255980] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.256987] Call Trace: [ 31.257330] [ 31.257619] dump_stack_lvl+0x91/0xf0 [ 31.258115] print_report+0xcc/0x620 [ 31.258614] ? __virt_addr_valid+0x102/0x340 [ 31.259213] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259851] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260498] kasan_report+0xbe/0xf0 [ 31.260979] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261621] vma_interval_tree_remove+0xc75/0xec0 [ 31.262247] vma_prepare+0xc54/0x11a0 [ 31.262750] __split_vma+0x5af/0x950 [ 31.263248] ? __pfx___split_vma+0x10/0x10 [ 31.263794] ? find_held_lock+0x2c/0x110 [ 31.264329] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.264905] ? lock_is_held_type+0x9f/0x120 [ 31.265459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.266085] ? mtree_range_walk+0x632/0x900 [ 31.266647] ? mas_walk+0x5c7/0x7c0 [ 31.267129] do_vmi_munmap+0x1f1/0x2b0 [ 31.267622] mmap_region+0x1f9/0x2660 [ 31.268109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.268630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.269368] ? __pfx_lock_acquire+0x10/0x10 [ 31.269919] ? __pfx_mmap_region+0x10/0x10 [ 31.270460] ? security_mmap_addr+0x7d/0xa0 [ 31.271020] ? get_unmapped_area+0x1f5/0x3f0 [ 31.271576] do_mmap+0x854/0xf00 [ 31.272025] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.273112] ksys_mmap_pgoff+0x3af/0x500 [ 31.273622] do_syscall_64+0x3f/0x90 [ 31.274104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274765] RIP: 0033:0x7fd5db8ead82 [ 31.275238] 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 [ 31.277402] RSP: 002b:00007ffc0d86ede8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.278362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5db8ead82 [ 31.279257] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5dad24000 [ 31.280156] RBP: 00007fd5dad24000 R08: 0000000000000009 R09: 0000000000001000 [ 31.281004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4b57b2d90 [ 31.281849] R13: 00007ffc0d86ee00 R14: 00007ffc0d86ee30 R15: 00007ffc0d86f190 [ 31.282708] [ 31.283001] [ 31.283218] Allocated by task 212: [ 31.283644] kasan_save_stack+0x22/0x50 [ 31.284149] kasan_set_track+0x25/0x30 [ 31.284639] __kasan_slab_alloc+0x59/0x70 [ 31.285161] kmem_cache_alloc+0x16b/0x370 [ 31.285679] vm_area_dup+0x20/0x160 [ 31.286134] __split_vma+0x170/0x950 [ 31.286602] split_vma+0xc6/0x110 [ 31.287045] mprotect_fixup+0x8d2/0xb30 [ 31.287547] do_mprotect_pkey+0x87e/0xd40 [ 31.288077] __x64_sys_mprotect+0x78/0xc0 [ 31.288595] do_syscall_64+0x3f/0x90 [ 31.289071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289707] [ 31.289922] Freed by task 13: [ 31.290310] kasan_save_stack+0x22/0x50 [ 31.290824] kasan_set_track+0x25/0x30 [ 31.291320] kasan_save_free_info+0x2b/0x50 [ 31.291852] __kasan_slab_free+0x10a/0x190 [ 31.292380] kmem_cache_free+0x10d/0x4d0 [ 31.292892] rcu_core+0x8c8/0x2860 [ 31.293336] __do_softirq+0x1b7/0x7d4 [ 31.293819] [ 31.294035] Last potentially related work creation: [ 31.294620] kasan_save_stack+0x22/0x50 [ 31.295137] __kasan_record_aux_stack+0x8e/0xa0 [ 31.295711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296349] remove_vma+0x139/0x170 [ 31.296804] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297370] do_vmi_munmap+0x1f1/0x2b0 [ 31.297858] __vm_munmap+0x138/0x3a0 [ 31.298324] __x64_sys_munmap+0x59/0x80 [ 31.298832] do_syscall_64+0x3f/0x90 [ 31.299306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299954] [ 31.300168] The buggy address belongs to the object at ffff88800cbbd3a0 [ 31.300168] which belongs to the cache vm_area_struct of size 168 [ 31.301636] The buggy address is located 88 bytes inside of [ 31.301636] freed 168-byte region [ffff88800cbbd3a0, ffff88800cbbd448) [ 31.303052] [ 31.303265] The buggy address belongs to the physical page: [ 31.303925] page:000000009303e2f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbbd [ 31.305016] memcg:ffff888016833a01 [ 31.305447] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.306098] page_type: 0xffffffff() [ 31.306544] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.307484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016833a01 [ 31.308387] page dumped because: kasan: bad access detected [ 31.309044] [ 31.309263] Memory state around the buggy address: [ 31.309839] ffff88800cbbd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.310699] ffff88800cbbd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.311576] >ffff88800cbbd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.312444] ^ [ 31.313286] ffff88800cbbd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.314137] ffff88800cbbd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.314994] ================================================================== [ 31.315959] Disabling lock debugging due to kernel taint [ 33.202810] BUG: Bad rss-counter state mm:00000000a9c8266e type:MM_FILEPAGES val:33 [ 33.203796] BUG: Bad rss-counter state mm:00000000a9c8266e type:MM_ANONPAGES val:22 [ 33.691203] BUG: Bad rss-counter state mm:00000000f211501a type:MM_FILEPAGES val:33 [ 33.692369] BUG: Bad rss-counter state mm:00000000f211501a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19499' (ECDSA) to the list of known hosts. 2023/06/20 15:36:43 fuzzer started 2023/06/20 15:36:43 dialing manager at localhost:36067 2023/06/20 15:36:43 checking machine... 2023/06/20 15:36:43 checking revisions... [ 34.397808] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:36:43 testing simple program... [ 34.453905] cgroup: Unknown subsys name 'net' [ 34.511802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:36:43 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f31 RSI=ffffffff813782f8 RDI=ffff888008d9f9f8 RBP=ffff888008d9f9c8 RSP=ffff888008d9f928 R8 =0000000000000001 R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000022978 R12=ffff888008d9f9f8 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888019af4500 RIP=ffffffff84538440 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 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=00007f7923b927c0 CR3=000000000c550000 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=eddc51cb4dd9efbdfa45e0ae008acd4b XMM02=000000000011b378ec2efd57dc4c00df XMM03=0000000000122528c527d493fade9ffc XMM04=09ca492f6230d6c500000000000ae988 XMM05=a68101deaf59604d0000000000133160 XMM06=806171799158d9670000000000132200 XMM07=e042d86d42eb936e00000000001227a8 XMM08=c527d493fade9ffc000000000011b3d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=ffff88806cf09bb8 RSI=0000000000000000 RDI=ffff88806cf09a88 RBP=ffff88806cf09b10 RSP=ffff88806cf09a68 R8 =ffffffff860d825a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888017d3d1c0 R15=ffff88806cf09a78 RIP=ffffffff81130937 RFL=00000292 [--S-A--] 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 00007fb57ae40900 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=00007fb57ae0a008 CR3=000000001452e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000