[ 56.178874] BUG: Bad rss-counter state mm:00000000f5acaa47 type:MM_FILEPAGES val:33 [ 56.179906] BUG: Bad rss-counter state mm:00000000f5acaa47 type:MM_ANONPAGES val:22 [ 56.215116] ================================================================== [ 56.216145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.217081] Read of size 8 at addr ffff888016bfd880 by task sshd/226 [ 56.217954] [ 56.218170] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 56.219045] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.220034] Call Trace: [ 56.220356] [ 56.220643] dump_stack_lvl+0x91/0xf0 [ 56.221136] print_report+0xcc/0x620 [ 56.221617] ? __virt_addr_valid+0x102/0x340 [ 56.222168] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.222800] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.223418] kasan_report+0xbe/0xf0 [ 56.223897] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.224513] vma_interval_tree_remove+0xc75/0xec0 [ 56.225109] vma_prepare+0xc54/0x11a0 [ 56.225585] __split_vma+0x5af/0x950 [ 56.226055] ? __pfx___split_vma+0x10/0x10 [ 56.226602] ? find_held_lock+0x2c/0x110 [ 56.227134] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.227708] ? lock_is_held_type+0x9f/0x120 [ 56.228251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.228855] ? mtree_range_walk+0x632/0x900 [ 56.229410] ? mas_walk+0x5c7/0x7c0 [ 56.229888] do_vmi_munmap+0x1f1/0x2b0 [ 56.230403] mmap_region+0x1f9/0x2660 [ 56.230889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.231415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.232124] ? __pfx_lock_acquire+0x10/0x10 [ 56.232664] ? __pfx_mmap_region+0x10/0x10 [ 56.233200] ? security_mmap_addr+0x7d/0xa0 [ 56.233732] ? get_unmapped_area+0x1f5/0x3f0 [ 56.234292] do_mmap+0x854/0xf00 [ 56.234780] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.235281] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.235838] ksys_mmap_pgoff+0x3af/0x500 [ 56.236346] do_syscall_64+0x3f/0x90 [ 56.236829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.237483] RIP: 0033:0x7fdb399c7d82 [ 56.237943] 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 [ 56.240072] RSP: 002b:00007ffd6782cb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.240976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb399c7d82 [ 56.241818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb38e01000 [ 56.242692] RBP: 00007fdb38e01000 R08: 0000000000000009 R09: 0000000000001000 [ 56.243535] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652323dbec0 [ 56.244382] R13: 00007ffd6782cb40 R14: 00007ffd6782cb70 R15: 00007ffd6782ced0 [ 56.245225] [ 56.245513] [ 56.245730] Allocated by task 209: [ 56.246165] kasan_save_stack+0x22/0x50 [ 56.246685] kasan_set_track+0x25/0x30 [ 56.247176] __kasan_slab_alloc+0x59/0x70 [ 56.247701] kmem_cache_alloc+0x16b/0x370 [ 56.248212] vm_area_dup+0x20/0x160 [ 56.248665] __split_vma+0x170/0x950 [ 56.249131] split_vma+0xc6/0x110 [ 56.249569] mprotect_fixup+0x8d2/0xb30 [ 56.250073] do_mprotect_pkey+0x87e/0xd40 [ 56.250607] __x64_sys_mprotect+0x78/0xc0 [ 56.251126] do_syscall_64+0x3f/0x90 [ 56.251603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.252251] [ 56.252470] Freed by task 209: [ 56.252857] kasan_save_stack+0x22/0x50 [ 56.253358] kasan_set_track+0x25/0x30 [ 56.253855] kasan_save_free_info+0x2b/0x50 [ 56.254407] __kasan_slab_free+0x10a/0x190 [ 56.254939] kmem_cache_free+0x10d/0x4d0 [ 56.255447] rcu_core+0x8c8/0x2860 [ 56.255891] __do_softirq+0x1b7/0x7d4 [ 56.256365] [ 56.256582] Last potentially related work creation: [ 56.257162] kasan_save_stack+0x22/0x50 [ 56.257666] __kasan_record_aux_stack+0x8e/0xa0 [ 56.258238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.258882] remove_vma+0x139/0x170 [ 56.259335] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.259886] do_vmi_munmap+0x1f1/0x2b0 [ 56.260375] __vm_munmap+0x138/0x3a0 [ 56.260838] __x64_sys_munmap+0x59/0x80 [ 56.261337] do_syscall_64+0x3f/0x90 [ 56.261810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.262472] [ 56.262684] The buggy address belongs to the object at ffff888016bfd828 [ 56.262684] which belongs to the cache vm_area_struct of size 168 [ 56.264151] The buggy address is located 88 bytes inside of [ 56.264151] freed 168-byte region [ffff888016bfd828, ffff888016bfd8d0) [ 56.265552] [ 56.265770] The buggy address belongs to the physical page: [ 56.266429] page:000000001985e5ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bfd [ 56.267510] memcg:ffff88800e918e01 [ 56.267941] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.268583] page_type: 0xffffffff() [ 56.269040] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fabc0 dead000000000004 [ 56.269950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e918e01 [ 56.270871] page dumped because: kasan: bad access detected [ 56.271538] [ 56.271756] Memory state around the buggy address: [ 56.272349] ffff888016bfd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 56.273205] ffff888016bfd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 56.274073] >ffff888016bfd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 56.274933] ^ [ 56.275348] ffff888016bfd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.276209] ffff888016bfd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 56.277063] ================================================================== [ 56.278197] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 59.106745] BUG: Bad rss-counter state mm:0000000053a0bc1f type:MM_FILEPAGES val:33 [ 59.107890] BUG: Bad rss-counter state mm:0000000053a0bc1f type:MM_ANONPAGES val:22 [ 59.553466] BUG: Bad rss-counter state mm:0000000036073662 type:MM_FILEPAGES val:33 [ 59.554653] BUG: Bad rss-counter state mm:0000000036073662 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30012' (ECDSA) to the list of known hosts. 2023/06/21 04:18:45 fuzzer started 2023/06/21 04:18:45 dialing manager at localhost:36067 2023/06/21 04:18:45 checking machine... 2023/06/21 04:18:45 checking revisions... [ 60.256771] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:18:45 testing simple program... [ 60.313993] cgroup: Unknown subsys name 'net' [ 60.351266] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:18:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11001dedf6c RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019ab8de8 RBP=ffff888019ab8d78 RSP=ffff88800ef6fb28 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff888019ab8de8 R15=0000000000000000 RIP=ffffffff812d8e83 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 00007f6250d4a700 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=00007fdea04c5650 CR3=0000000019df8000 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=2035343a38313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a38313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fbe362fd3c0 CR3=000000000d9e2000 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=2d6725f8cd7fbc8efa41d6c5022d2026 XMM02=000000000011ac50ec2efd57dc4c00df XMM03=00000000001215f03af07b0113c7669a XMM04=63203b3908f44cf900000000000ae988 XMM05=01226bf55e0e2d1c00000000001322a0 XMM06=13e856d8d71426c80000000000130fd0 XMM07=e042d86d42eb936e00000000001218c8 XMM08=3af07b0113c7669a000000000011acb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000