[ 61.930032] BUG: Bad rss-counter state mm:00000000ffe529ed type:MM_FILEPAGES val:33 [ 61.931593] BUG: Bad rss-counter state mm:00000000ffe529ed type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.094046] ================================================================== [ 62.094980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.095917] Read of size 8 at addr ffff88800e07f140 by task sshd/225 [ 62.096675] [ 62.096892] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.097841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.098819] Call Trace: [ 62.099139] [ 62.099563] dump_stack_lvl+0x91/0xf0 [ 62.100158] print_report+0xcc/0x620 [ 62.100742] ? __virt_addr_valid+0x102/0x340 [ 62.101411] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.102173] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.102926] kasan_report+0xbe/0xf0 [ 62.103498] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.104252] vma_interval_tree_remove+0xc75/0xec0 [ 62.104979] vma_prepare+0xc54/0x11a0 [ 62.105557] __split_vma+0x5af/0x950 [ 62.106137] ? __pfx___split_vma+0x10/0x10 [ 62.106777] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 62.107560] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 62.108377] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 62.109203] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.109881] ? lock_is_held_type+0x9f/0x120 [ 62.110559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.111270] ? mtree_range_walk+0x632/0x900 [ 62.111814] ? mas_walk+0x5c7/0x7c0 [ 62.112293] do_vmi_munmap+0x1f1/0x2b0 [ 62.112782] mmap_region+0x1f9/0x2660 [ 62.113262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.113766] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.114478] ? __pfx_lock_acquire+0x10/0x10 [ 62.115003] ? __pfx_mmap_region+0x10/0x10 [ 62.115529] ? security_mmap_addr+0x7d/0xa0 [ 62.116050] ? get_unmapped_area+0x1f5/0x3f0 [ 62.116592] do_mmap+0x854/0xf00 [ 62.117029] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.117514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.118076] ksys_mmap_pgoff+0x3af/0x500 [ 62.118598] do_syscall_64+0x3f/0x90 [ 62.119070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.119708] RIP: 0033:0x7f368450cd82 [ 62.120167] 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 [ 62.122269] RSP: 002b:00007ffd1013e6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.123171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f368450cd82 [ 62.124005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3683946000 [ 62.124834] RBP: 00007f3683946000 R08: 0000000000000009 R09: 0000000000001000 [ 62.125664] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d71868d90 [ 62.126504] R13: 00007ffd1013e710 R14: 00007ffd1013e740 R15: 00007ffd1013eaa0 [ 62.127347] [ 62.127633] [ 62.127848] Allocated by task 218: [ 62.128273] kasan_save_stack+0x22/0x50 [ 62.128774] kasan_set_track+0x25/0x30 [ 62.129259] __kasan_slab_alloc+0x59/0x70 [ 62.129777] kmem_cache_alloc+0x16b/0x370 [ 62.130303] vm_area_dup+0x20/0x160 [ 62.130750] __split_vma+0x170/0x950 [ 62.131212] split_vma+0xc6/0x110 [ 62.131643] mprotect_fixup+0x8d2/0xb30 [ 62.132154] do_mprotect_pkey+0x87e/0xd40 [ 62.132668] __x64_sys_mprotect+0x78/0xc0 [ 62.133185] do_syscall_64+0x3f/0x90 [ 62.133651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.134292] [ 62.134508] Freed by task 218: [ 62.134896] kasan_save_stack+0x22/0x50 [ 62.135394] kasan_set_track+0x25/0x30 [ 62.135881] kasan_save_free_info+0x2b/0x50 [ 62.136412] __kasan_slab_free+0x10a/0x190 [ 62.136942] kmem_cache_free+0x10d/0x4d0 [ 62.137444] rcu_core+0x8c8/0x2860 [ 62.137888] __do_softirq+0x1b7/0x7d4 [ 62.138372] [ 62.138584] Last potentially related work creation: [ 62.139167] kasan_save_stack+0x22/0x50 [ 62.139674] __kasan_record_aux_stack+0x8e/0xa0 [ 62.140243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.140876] remove_vma+0x139/0x170 [ 62.141323] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.141873] do_vmi_munmap+0x1f1/0x2b0 [ 62.142365] __vm_munmap+0x138/0x3a0 [ 62.142826] __x64_sys_munmap+0x59/0x80 [ 62.143320] do_syscall_64+0x3f/0x90 [ 62.143791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.144428] [ 62.144639] The buggy address belongs to the object at ffff88800e07f0e8 [ 62.144639] which belongs to the cache vm_area_struct of size 168 [ 62.146083] The buggy address is located 88 bytes inside of [ 62.146083] freed 168-byte region [ffff88800e07f0e8, ffff88800e07f190) [ 62.147478] [ 62.147691] The buggy address belongs to the physical page: [ 62.148341] page:00000000bc730d9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe07f [ 62.149402] memcg:ffff88800fd0f701 [ 62.149830] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.150475] page_type: 0xffffffff() [ 62.150919] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.151817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd0f701 [ 62.152714] page dumped because: kasan: bad access detected [ 62.153375] [ 62.153586] Memory state around the buggy address: [ 62.154180] ffff88800e07f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.155035] ffff88800e07f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 62.155881] >ffff88800e07f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.156734] ^ [ 62.157369] ffff88800e07f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 62.158227] ffff88800e07f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.159074] ================================================================== [ 62.160043] Disabling lock debugging due to kernel taint [ 63.781382] BUG: Bad rss-counter state mm:000000008ad4913a type:MM_FILEPAGES val:33 [ 63.782508] BUG: Bad rss-counter state mm:000000008ad4913a type:MM_ANONPAGES val:22 [ 64.223050] BUG: Bad rss-counter state mm:00000000a1831ba0 type:MM_FILEPAGES val:33 [ 64.224375] BUG: Bad rss-counter state mm:00000000a1831ba0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57912' (ECDSA) to the list of known hosts. 2023/06/19 11:47:23 fuzzer started 2023/06/19 11:47:23 dialing manager at localhost:44161 2023/06/19 11:47:23 checking machine... 2023/06/19 11:47:23 checking revisions... [ 64.961470] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:47:23 testing simple program... [ 65.000416] cgroup: Unknown subsys name 'net' [ 65.061853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:47:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002c30f25 RSI=ffff888016187f48 RDI=ffff888016187928 RBP=0000000000000000 RSP=ffff888016187868 R8 =0000000000000001 R9 =ffff888016187918 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016187938 R13=ffff888016187920 R14=ffff888016187f48 R15=ffff8880161878d8 RIP=ffffffff81131266 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 00007f4ba5a84900 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=00007ffd108d5000 CR3=0000000015d7e000 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=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 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=00007ff1f9ddeda8 CR3=000000000ca46000 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=ffa0fabb20204797084f065f51714639 XMM02=000000000011d680ec2efd57dc4c00df XMM03=000000000012404085910bf26f60dae3 XMM04=11572d420962fb5400000000000ae988 XMM05=6860aeb314f8829d0000000000133ba0 XMM06=bc58c28828a69b9e0000000000132d78 XMM07=e042d86d42eb936e0000000000124318 XMM08=85910bf26f60dae3000000000011d6e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000