[ 23.924765] BUG: Bad rss-counter state mm:0000000040b9c55f type:MM_FILEPAGES val:33 [ 23.926742] BUG: Bad rss-counter state mm:0000000040b9c55f type:MM_ANONPAGES val:22 [ 24.092504] ================================================================== [ 24.093590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.094710] Read of size 8 at addr ffff88800dfeb880 by task sshd/219 [ 24.095844] [ 24.096105] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.097063] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.098040] Call Trace: [ 24.098362] [ 24.098647] dump_stack_lvl+0x91/0xf0 [ 24.099145] print_report+0xcc/0x620 [ 24.099643] ? __virt_addr_valid+0x102/0x340 [ 24.100207] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100826] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101445] kasan_report+0xbe/0xf0 [ 24.101932] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.102556] vma_interval_tree_remove+0xc75/0xec0 [ 24.103165] vma_prepare+0xc54/0x11a0 [ 24.103659] __split_vma+0x5af/0x950 [ 24.104132] ? __pfx___split_vma+0x10/0x10 [ 24.104672] ? find_held_lock+0x2c/0x110 [ 24.105196] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.105766] ? lock_is_held_type+0x9f/0x120 [ 24.106316] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.106938] ? mtree_range_walk+0x632/0x900 [ 24.107494] ? mas_walk+0x5c7/0x7c0 [ 24.107996] do_vmi_munmap+0x1f1/0x2b0 [ 24.108494] mmap_region+0x1f9/0x2660 [ 24.108995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.109520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.110243] ? __pfx_lock_acquire+0x10/0x10 [ 24.110774] ? __pfx_mmap_region+0x10/0x10 [ 24.111320] ? security_mmap_addr+0x7d/0xa0 [ 24.111883] ? get_unmapped_area+0x1f5/0x3f0 [ 24.112441] do_mmap+0x854/0xf00 [ 24.112888] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.113387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.113960] ksys_mmap_pgoff+0x3af/0x500 [ 24.114470] do_syscall_64+0x3f/0x90 [ 24.114956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115604] RIP: 0033:0x7ff9468f4d82 [ 24.116094] 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 [ 24.118221] RSP: 002b:00007ffc0a84e1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.119128] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9468f4d82 [ 24.120000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff945d2e000 [ 24.120861] RBP: 00007ff945d2e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.121708] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643c49c9ec0 [ 24.122557] R13: 00007ffc0a84e1c0 R14: 00007ffc0a84e1f0 R15: 00007ffc0a84e550 [ 24.123412] [ 24.123728] [ 24.123945] Allocated by task 212: [ 24.124376] kasan_save_stack+0x22/0x50 [ 24.124886] kasan_set_track+0x25/0x30 [ 24.125382] __kasan_slab_alloc+0x59/0x70 [ 24.125906] kmem_cache_alloc+0x16b/0x370 [ 24.126424] vm_area_dup+0x20/0x160 [ 24.126879] __split_vma+0x170/0x950 [ 24.127346] split_vma+0xc6/0x110 [ 24.127821] mprotect_fixup+0x8d2/0xb30 [ 24.128324] do_mprotect_pkey+0x87e/0xd40 [ 24.128845] __x64_sys_mprotect+0x78/0xc0 [ 24.129434] do_syscall_64+0x3f/0x90 [ 24.129920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.130561] [ 24.130781] Freed by task 212: [ 24.131167] kasan_save_stack+0x22/0x50 [ 24.131681] kasan_set_track+0x25/0x30 [ 24.132171] kasan_save_free_info+0x2b/0x50 [ 24.132702] __kasan_slab_free+0x10a/0x190 [ 24.133234] kmem_cache_free+0x10d/0x4d0 [ 24.133741] rcu_core+0x8c8/0x2860 [ 24.134185] __do_softirq+0x1b7/0x7d4 [ 24.134664] [ 24.134886] Last potentially related work creation: [ 24.135464] kasan_save_stack+0x22/0x50 [ 24.136056] __kasan_record_aux_stack+0x8e/0xa0 [ 24.136633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.137278] remove_vma+0x139/0x170 [ 24.137744] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.138302] do_vmi_munmap+0x1f1/0x2b0 [ 24.138788] __vm_munmap+0x138/0x3a0 [ 24.139255] __x64_sys_munmap+0x59/0x80 [ 24.139776] do_syscall_64+0x3f/0x90 [ 24.140252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.140896] [ 24.141113] Second to last potentially related work creation: [ 24.141796] kasan_save_stack+0x22/0x50 [ 24.142299] __kasan_record_aux_stack+0x8e/0xa0 [ 24.142874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.143515] remove_vma+0x139/0x170 [ 24.143976] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.144535] do_vmi_munmap+0x1f1/0x2b0 [ 24.145029] mmap_region+0x1f9/0x2660 [ 24.145507] do_mmap+0x854/0xf00 [ 24.145954] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.146452] ksys_mmap_pgoff+0x3af/0x500 [ 24.146961] do_syscall_64+0x3f/0x90 [ 24.147440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.148115] [ 24.148332] The buggy address belongs to the object at ffff88800dfeb828 [ 24.148332] which belongs to the cache vm_area_struct of size 168 [ 24.149789] The buggy address is located 88 bytes inside of [ 24.149789] freed 168-byte region [ffff88800dfeb828, ffff88800dfeb8d0) [ 24.151190] [ 24.151408] The buggy address belongs to the physical page: [ 24.152090] page:00000000ba7f720b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfeb [ 24.153169] memcg:ffff88800cdfe101 [ 24.153595] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.154235] page_type: 0xffffffff() [ 24.154690] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393f80 dead000000000002 [ 24.155601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cdfe101 [ 24.156543] page dumped because: kasan: bad access detected [ 24.157204] [ 24.157422] Memory state around the buggy address: [ 24.158004] ffff88800dfeb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.158861] ffff88800dfeb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.159720] >ffff88800dfeb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.160568] ^ [ 24.160981] ffff88800dfeb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.161836] ffff88800dfeb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.162688] ================================================================== [ 24.163723] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.199851] BUG: Bad rss-counter state mm:00000000a1fcd177 type:MM_FILEPAGES val:33 [ 26.201014] BUG: Bad rss-counter state mm:00000000a1fcd177 type:MM_ANONPAGES val:22 [ 26.671670] BUG: Bad rss-counter state mm:000000007d1b960a type:MM_FILEPAGES val:33 [ 26.673272] BUG: Bad rss-counter state mm:000000007d1b960a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52097' (ECDSA) to the list of known hosts. 2023/06/21 05:36:19 fuzzer started 2023/06/21 05:36:19 dialing manager at localhost:36067 2023/06/21 05:36:19 checking machine... 2023/06/21 05:36:19 checking revisions... [ 27.394859] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:36:19 testing simple program... [ 27.446573] cgroup: Unknown subsys name 'net' [ 27.506487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:19 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8450cc8c RBP=ffff888019e5ff48 RSP=ffff888019e5ff40 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450cc90 RFL=00000046 [---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 00007f0a5d8ef900 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=00007ffcc06e2aa8 CR3=000000001a37c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff88806cf09f50 RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf09a38 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800c604480 RIP=ffffffff8113038e 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 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=00007f6361c13620 CR3=000000000d7c0000 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=5552a65384dfc1a84247797abdfb6f66 XMM02=2c67c8bc2e329bc3000000000011c498 XMM03=fb795ef6d65770560000000000122748 XMM04=31456adea693a89500000000000ae988 XMM05=dfcdbad4f1609c3700000000001338f8 XMM06=c54536a28f0a9d9f0000000000132ad0 XMM07=e042d86d42eb936e0000000000122a20 XMM08=2856baaac8e3ed67000000000011c4f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000