[ 24.366905] BUG: Bad rss-counter state mm:0000000046ec2587 type:MM_FILEPAGES val:33 [ 24.368032] BUG: Bad rss-counter state mm:0000000046ec2587 type:MM_ANONPAGES val:22 [ 24.537774] ================================================================== [ 24.538732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.539729] Read of size 8 at addr ffff88800dc30a50 by task sshd/220 [ 24.540519] [ 24.540736] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.541633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.542634] Call Trace: [ 24.542965] [ 24.543279] dump_stack_lvl+0x91/0xf0 [ 24.543826] print_report+0xcc/0x620 [ 24.544330] ? __virt_addr_valid+0x102/0x340 [ 24.544878] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.545502] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.546117] kasan_report+0xbe/0xf0 [ 24.546604] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.547217] vma_interval_tree_remove+0xc75/0xec0 [ 24.547817] vma_prepare+0xc54/0x11a0 [ 24.548287] __split_vma+0x5af/0x950 [ 24.548766] ? __pfx___split_vma+0x10/0x10 [ 24.549298] ? find_held_lock+0x2c/0x110 [ 24.549828] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.550404] ? lock_is_held_type+0x9f/0x120 [ 24.550942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.551621] ? mtree_range_walk+0x632/0x900 [ 24.552222] ? mas_walk+0x5c7/0x7c0 [ 24.552698] do_vmi_munmap+0x1f1/0x2b0 [ 24.553189] mmap_region+0x1f9/0x2660 [ 24.553675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.554209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.554923] ? __pfx_lock_acquire+0x10/0x10 [ 24.555455] ? __pfx_mmap_region+0x10/0x10 [ 24.555984] ? security_mmap_addr+0x7d/0xa0 [ 24.556511] ? get_unmapped_area+0x1f5/0x3f0 [ 24.557057] do_mmap+0x854/0xf00 [ 24.557488] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.557979] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.558542] ksys_mmap_pgoff+0x3af/0x500 [ 24.559044] do_syscall_64+0x3f/0x90 [ 24.559529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.560169] RIP: 0033:0x7fa676bd0d82 [ 24.560623] 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 [ 24.562729] RSP: 002b:00007fff6a0ae408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.563637] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa676bd0d82 [ 24.564480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa67600a000 [ 24.565318] RBP: 00007fa67600a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.566153] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c41cc38980 [ 24.567019] R13: 00007fff6a0ae420 R14: 00007fff6a0ae450 R15: 00007fff6a0ae7b0 [ 24.567878] [ 24.568188] [ 24.568404] Allocated by task 213: [ 24.568850] kasan_save_stack+0x22/0x50 [ 24.569364] kasan_set_track+0x25/0x30 [ 24.569879] __kasan_slab_alloc+0x59/0x70 [ 24.570433] kmem_cache_alloc+0x16b/0x370 [ 24.570968] vm_area_dup+0x20/0x160 [ 24.571429] __split_vma+0x170/0x950 [ 24.571907] split_vma+0xc6/0x110 [ 24.572350] mprotect_fixup+0x8d2/0xb30 [ 24.572867] do_mprotect_pkey+0x87e/0xd40 [ 24.573393] __x64_sys_mprotect+0x78/0xc0 [ 24.573910] do_syscall_64+0x3f/0x90 [ 24.574396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.575045] [ 24.575256] Freed by task 213: [ 24.575647] kasan_save_stack+0x22/0x50 [ 24.576149] kasan_set_track+0x25/0x30 [ 24.576644] kasan_save_free_info+0x2b/0x50 [ 24.577195] __kasan_slab_free+0x10a/0x190 [ 24.577756] kmem_cache_free+0x10d/0x4d0 [ 24.578304] rcu_core+0x8c8/0x2860 [ 24.578757] __do_softirq+0x1b7/0x7d4 [ 24.579251] [ 24.579475] Last potentially related work creation: [ 24.580076] kasan_save_stack+0x22/0x50 [ 24.580597] __kasan_record_aux_stack+0x8e/0xa0 [ 24.581200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.581861] remove_vma+0x139/0x170 [ 24.582331] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.582906] do_vmi_munmap+0x1f1/0x2b0 [ 24.583413] __vm_munmap+0x138/0x3a0 [ 24.583892] __x64_sys_munmap+0x59/0x80 [ 24.584405] do_syscall_64+0x3f/0x90 [ 24.584898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.585565] [ 24.585790] Second to last potentially related work creation: [ 24.586529] kasan_save_stack+0x22/0x50 [ 24.587053] __kasan_record_aux_stack+0x8e/0xa0 [ 24.587631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.588290] remove_vma+0x139/0x170 [ 24.588761] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.589328] do_vmi_munmap+0x1f1/0x2b0 [ 24.589822] mmap_region+0x1f9/0x2660 [ 24.590313] do_mmap+0x854/0xf00 [ 24.590740] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.591240] ksys_mmap_pgoff+0x3af/0x500 [ 24.591743] do_syscall_64+0x3f/0x90 [ 24.592222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.592865] [ 24.593081] The buggy address belongs to the object at ffff88800dc309f8 [ 24.593081] which belongs to the cache vm_area_struct of size 168 [ 24.594568] The buggy address is located 88 bytes inside of [ 24.594568] freed 168-byte region [ffff88800dc309f8, ffff88800dc30aa0) [ 24.595969] [ 24.596183] The buggy address belongs to the physical page: [ 24.596839] page:0000000041a48aa1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc30 [ 24.597967] memcg:ffff88800fc47101 [ 24.598426] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.599074] page_type: 0xffffffff() [ 24.599523] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b75c0 000000000000000c [ 24.600456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc47101 [ 24.601352] page dumped because: kasan: bad access detected [ 24.602030] [ 24.602256] Memory state around the buggy address: [ 24.602829] ffff88800dc30900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.603701] ffff88800dc30980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.604566] >ffff88800dc30a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.605450] ^ [ 24.606146] ffff88800dc30a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.607056] ffff88800dc30b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.607909] ================================================================== [ 24.608880] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.839043] BUG: Bad rss-counter state mm:0000000099e49fc5 type:MM_FILEPAGES val:33 [ 26.839756] BUG: Bad rss-counter state mm:0000000099e49fc5 type:MM_ANONPAGES val:22 [ 27.254632] BUG: Bad rss-counter state mm:00000000f3040f34 type:MM_FILEPAGES val:33 [ 27.255581] BUG: Bad rss-counter state mm:00000000f3040f34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25024' (ECDSA) to the list of known hosts. 2023/06/20 21:51:43 fuzzer started 2023/06/20 21:51:43 dialing manager at localhost:36067 2023/06/20 21:51:43 checking machine... 2023/06/20 21:51:43 checking revisions... [ 27.921331] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:51:43 testing simple program... [ 27.964788] cgroup: Unknown subsys name 'net' [ 28.024093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:51:42 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=00007ff3ae24e998 CR3=000000000c6c8000 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=ab4de730ba7543a28c47f3dacc8105aa XMM02=000000000011db48ec2efd57dc4c00df XMM03=00000000001217f0bd626b09d9f61a2f XMM04=6ac7930d42d9f15d00000000000ae988 XMM05=19e9129bd510f23500000000001329c0 XMM06=ed35cfdc5acddc120000000000131b98 XMM07=e042d86d42eb936e0000000000121ac8 XMM08=bd626b09d9f61a2f000000000011dba8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018ccfab0 RCX=0000000000000001 RDX=1ffff11003199e1d RSI=ffff888018ccfa80 RDI=ffff888018ccf0e8 RBP=ffff888018cc8000 RSP=ffff888018ccf068 R8 =0000000000000001 R9 =ffff888018ccf118 R10=0000000000038001 R11=00000000000b3f09 R12=ffff888018ccf138 R13=ffff888018ccf120 R14=ffff888018ccfa80 R15=ffff888018ccf0d8 RIP=ffffffff81131ca6 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 00007f1288e55900 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=00007f1288e1f008 CR3=000000001ca5e000 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