[ 23.969104] BUG: Bad rss-counter state mm:00000000e01965dc type:MM_FILEPAGES val:33 [ 23.971157] BUG: Bad rss-counter state mm:00000000e01965dc type:MM_ANONPAGES val:22 [ 24.132808] ================================================================== [ 24.133769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.134722] Read of size 8 at addr ffff88800d694798 by task sshd/219 [ 24.135615] [ 24.135839] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.136746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.137754] Call Trace: [ 24.138079] [ 24.138372] dump_stack_lvl+0x91/0xf0 [ 24.138868] print_report+0xcc/0x620 [ 24.139396] ? __virt_addr_valid+0x102/0x340 [ 24.139954] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.140581] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.141203] kasan_report+0xbe/0xf0 [ 24.141681] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.142323] vma_interval_tree_remove+0xc75/0xec0 [ 24.142927] vma_prepare+0xc54/0x11a0 [ 24.143421] __split_vma+0x5af/0x950 [ 24.143903] ? __pfx___split_vma+0x10/0x10 [ 24.144451] ? find_held_lock+0x2c/0x110 [ 24.144973] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.145547] ? lock_is_held_type+0x9f/0x120 [ 24.146091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.146700] ? mtree_range_walk+0x632/0x900 [ 24.147266] ? mas_walk+0x5c7/0x7c0 [ 24.147749] do_vmi_munmap+0x1f1/0x2b0 [ 24.148243] mmap_region+0x1f9/0x2660 [ 24.148738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.149263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.149987] ? __pfx_lock_acquire+0x10/0x10 [ 24.150524] ? __pfx_mmap_region+0x10/0x10 [ 24.151063] ? security_mmap_addr+0x7d/0xa0 [ 24.151631] ? get_unmapped_area+0x1f5/0x3f0 [ 24.152182] do_mmap+0x854/0xf00 [ 24.152628] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.153125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.153693] ksys_mmap_pgoff+0x3af/0x500 [ 24.154207] do_syscall_64+0x3f/0x90 [ 24.154690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155354] RIP: 0033:0x7f0972132d82 [ 24.155819] 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 [ 24.157945] RSP: 002b:00007fffdf69ad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.158854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0972132d82 [ 24.159719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f097156c000 [ 24.160572] RBP: 00007f097156c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.161419] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f3aa6dec0 [ 24.162272] R13: 00007fffdf69ad80 R14: 00007fffdf69adb0 R15: 00007fffdf69b110 [ 24.163127] [ 24.163446] [ 24.163663] Allocated by task 212: [ 24.164108] kasan_save_stack+0x22/0x50 [ 24.164612] kasan_set_track+0x25/0x30 [ 24.165103] __kasan_slab_alloc+0x59/0x70 [ 24.165628] kmem_cache_alloc+0x16b/0x370 [ 24.166146] vm_area_dup+0x20/0x160 [ 24.166603] __split_vma+0x170/0x950 [ 24.167072] split_vma+0xc6/0x110 [ 24.167518] mprotect_fixup+0x8d2/0xb30 [ 24.168018] do_mprotect_pkey+0x87e/0xd40 [ 24.168539] __x64_sys_mprotect+0x78/0xc0 [ 24.169059] do_syscall_64+0x3f/0x90 [ 24.169541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.170197] [ 24.170411] Freed by task 212: [ 24.170805] kasan_save_stack+0x22/0x50 [ 24.171326] kasan_set_track+0x25/0x30 [ 24.171826] kasan_save_free_info+0x2b/0x50 [ 24.172359] __kasan_slab_free+0x10a/0x190 [ 24.172889] kmem_cache_free+0x10d/0x4d0 [ 24.173394] rcu_core+0x8c8/0x2860 [ 24.173842] __do_softirq+0x1b7/0x7d4 [ 24.174319] [ 24.174537] Last potentially related work creation: [ 24.175124] kasan_save_stack+0x22/0x50 [ 24.175669] __kasan_record_aux_stack+0x8e/0xa0 [ 24.176254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.176903] remove_vma+0x139/0x170 [ 24.177359] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.177922] do_vmi_munmap+0x1f1/0x2b0 [ 24.178412] __vm_munmap+0x138/0x3a0 [ 24.178892] __x64_sys_munmap+0x59/0x80 [ 24.179415] do_syscall_64+0x3f/0x90 [ 24.179900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.180560] [ 24.180776] The buggy address belongs to the object at ffff88800d694740 [ 24.180776] which belongs to the cache vm_area_struct of size 168 [ 24.182255] The buggy address is located 88 bytes inside of [ 24.182255] freed 168-byte region [ffff88800d694740, ffff88800d6947e8) [ 24.183680] [ 24.183897] The buggy address belongs to the physical page: [ 24.184583] page:00000000a8ee1de2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd694 [ 24.185694] memcg:ffff88801678ee01 [ 24.186122] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.186768] page_type: 0xffffffff() [ 24.187239] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.188149] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801678ee01 [ 24.189064] page dumped because: kasan: bad access detected [ 24.189730] [ 24.189947] Memory state around the buggy address: [ 24.190526] ffff88800d694680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.191389] ffff88800d694700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.192252] >ffff88800d694780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.193102] ^ [ 24.193602] ffff88800d694800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.194459] ffff88800d694880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.195333] ================================================================== [ 24.196337] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.313818] BUG: Bad rss-counter state mm:0000000069c5e30c type:MM_FILEPAGES val:33 [ 26.315271] BUG: Bad rss-counter state mm:0000000069c5e30c type:MM_ANONPAGES val:22 [ 26.799314] BUG: Bad rss-counter state mm:0000000003c067ff type:MM_FILEPAGES val:33 [ 26.800321] BUG: Bad rss-counter state mm:0000000003c067ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17786' (ECDSA) to the list of known hosts. 2023/06/20 13:11:27 fuzzer started 2023/06/20 13:11:27 dialing manager at localhost:36067 2023/06/20 13:11:27 checking machine... 2023/06/20 13:11:27 checking revisions... [ 27.523439] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:11:28 testing simple program... [ 27.573556] cgroup: Unknown subsys name 'net' [ 27.613972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:11:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f7ff37b1330 CR3=0000000008eac000 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=45504757a23a17998a4a5d7ba0be71da XMM02=000000000011a7d0eff9b2d0a8fce9cb XMM03=000000000011a8a02c67c8bc2e329bc3 XMM04=d5e59288814359cc00000000000ae988 XMM05=dfcdbad4f1609c3700000000001314f8 XMM06=806171799158d9670000000000131380 XMM07=e042d86d42eb936e00000000001219a0 XMM08=1ca0e960bd4ce660000000000011a8a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880099be601 RBX=ffff8880099bedc0 RCX=0000000000400038 RDX=0000000000400039 RSI=ffff8880099bedc0 RDI=ffff888008441500 RBP=ffff88801ca77a28 RSP=ffff88801ca77990 R8 =0000000000400038 R9 =0000000000000000 R10=ffffea0000266f80 R11=0000000000400038 R12=ffffea0000266f80 R13=ffff8880099be6c0 R14=ffff888008441500 R15=0000000000000000 RIP=ffffffff818097ef 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 00007f80e0586900 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=00007ffca4c8b000 CR3=00000000188e6000 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