syzkaller login: [ 36.905401] BUG: Bad rss-counter state mm:0000000002dbbffb type:MM_FILEPAGES val:33 [ 36.906604] BUG: Bad rss-counter state mm:0000000002dbbffb type:MM_ANONPAGES val:22 [ 36.994188] ================================================================== [ 36.995125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.996095] Read of size 8 at addr ffff88800c54fed8 by task sshd/219 [ 36.996863] [ 36.997087] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.998053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.999094] Call Trace: [ 36.999419] [ 36.999744] dump_stack_lvl+0x91/0xf0 [ 37.000237] print_report+0xcc/0x620 [ 37.000735] ? __virt_addr_valid+0x102/0x340 [ 37.001293] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.001915] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.002534] kasan_report+0xbe/0xf0 [ 37.003021] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.003651] vma_interval_tree_remove+0xc75/0xec0 [ 37.004260] vma_prepare+0xc54/0x11a0 [ 37.004744] __split_vma+0x5af/0x950 [ 37.005216] ? __pfx___split_vma+0x10/0x10 [ 37.005750] ? find_held_lock+0x2c/0x110 [ 37.006271] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.006839] ? lock_is_held_type+0x9f/0x120 [ 37.007384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.008002] ? mtree_range_walk+0x632/0x900 [ 37.008562] ? mas_walk+0x5c7/0x7c0 [ 37.009036] do_vmi_munmap+0x1f1/0x2b0 [ 37.009542] mmap_region+0x1f9/0x2660 [ 37.010026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.010544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.011266] ? __pfx_lock_acquire+0x10/0x10 [ 37.011816] ? __pfx_mmap_region+0x10/0x10 [ 37.012348] ? security_mmap_addr+0x7d/0xa0 [ 37.012888] ? get_unmapped_area+0x1f5/0x3f0 [ 37.013445] do_mmap+0x854/0xf00 [ 37.013895] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.014391] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.014956] ksys_mmap_pgoff+0x3af/0x500 [ 37.015464] do_syscall_64+0x3f/0x90 [ 37.015953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.016604] RIP: 0033:0x7fd177bedd82 [ 37.017065] 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 [ 37.019217] RSP: 002b:00007ffc90feda58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.020134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd177bedd82 [ 37.021017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd177027000 [ 37.021913] RBP: 00007fd177027000 R08: 0000000000000009 R09: 0000000000001000 [ 37.022801] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555917f69d90 [ 37.023700] R13: 00007ffc90feda70 R14: 00007ffc90fedaa0 R15: 00007ffc90fede00 [ 37.024606] [ 37.024913] [ 37.025140] Allocated by task 212: [ 37.025579] kasan_save_stack+0x22/0x50 [ 37.026110] kasan_set_track+0x25/0x30 [ 37.026620] __kasan_slab_alloc+0x59/0x70 [ 37.027170] kmem_cache_alloc+0x16b/0x370 [ 37.027716] vm_area_dup+0x20/0x160 [ 37.028194] __split_vma+0x170/0x950 [ 37.028685] split_vma+0xc6/0x110 [ 37.029145] mprotect_fixup+0x8d2/0xb30 [ 37.029665] do_mprotect_pkey+0x87e/0xd40 [ 37.030207] __x64_sys_mprotect+0x78/0xc0 [ 37.030752] do_syscall_64+0x3f/0x90 [ 37.031250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.031935] [ 37.032157] Freed by task 212: [ 37.032567] kasan_save_stack+0x22/0x50 [ 37.033097] kasan_set_track+0x25/0x30 [ 37.033618] kasan_save_free_info+0x2b/0x50 [ 37.034179] __kasan_slab_free+0x10a/0x190 [ 37.034725] kmem_cache_free+0x10d/0x4d0 [ 37.035252] rcu_core+0x8c8/0x2860 [ 37.035714] __do_softirq+0x1b7/0x7d4 [ 37.036215] [ 37.036438] Last potentially related work creation: [ 37.037031] kasan_save_stack+0x22/0x50 [ 37.037558] __kasan_record_aux_stack+0x8e/0xa0 [ 37.038161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.038842] remove_vma+0x139/0x170 [ 37.039372] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.039961] do_vmi_munmap+0x1f1/0x2b0 [ 37.040470] __vm_munmap+0x138/0x3a0 [ 37.040963] __x64_sys_munmap+0x59/0x80 [ 37.041487] do_syscall_64+0x3f/0x90 [ 37.041979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.042649] [ 37.042869] The buggy address belongs to the object at ffff88800c54fe80 [ 37.042869] which belongs to the cache vm_area_struct of size 168 [ 37.044413] The buggy address is located 88 bytes inside of [ 37.044413] freed 168-byte region [ffff88800c54fe80, ffff88800c54ff28) [ 37.045879] [ 37.046104] The buggy address belongs to the physical page: [ 37.046783] page:0000000018da9762 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc54f [ 37.047927] memcg:ffff88800eea8801 [ 37.048374] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.049045] page_type: 0xffffffff() [ 37.049520] raw: 0100000000000200 ffff88800879fc80 ffffea0000260f80 dead000000000006 [ 37.050485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eea8801 [ 37.051434] page dumped because: kasan: bad access detected [ 37.052131] [ 37.052355] Memory state around the buggy address: [ 37.052955] ffff88800c54fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.053852] ffff88800c54fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.054748] >ffff88800c54fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.055645] ^ [ 37.056403] ffff88800c54ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 37.057306] ffff88800c54ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.058200] ================================================================== [ 37.059227] Disabling lock debugging due to kernel taint [ 39.688765] BUG: Bad rss-counter state mm:0000000064d761f0 type:MM_FILEPAGES val:33 [ 39.690018] BUG: Bad rss-counter state mm:0000000064d761f0 type:MM_ANONPAGES val:22 [ 40.184997] BUG: Bad rss-counter state mm:00000000b82e4be2 type:MM_FILEPAGES val:33 [ 40.185997] BUG: Bad rss-counter state mm:00000000b82e4be2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8466' (ECDSA) to the list of known hosts. 2023/06/19 18:39:39 fuzzer started 2023/06/19 18:39:39 dialing manager at localhost:44161 2023/06/19 18:39:39 checking machine... 2023/06/19 18:39:39 checking revisions... [ 40.892222] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:39:40 testing simple program... [ 40.943269] cgroup: Unknown subsys name 'net' [ 40.981671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:39:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff860d6801 RDX=1ffff1100d9c137a RSI=ffffffff8180c522 RDI=ffff88806ce09b6c RBP=ffff88806ce09bd0 RSP=ffff88806ce09a78 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888016d6a410 RIP=ffffffff813ad4f9 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 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=00007ffe56c99598 CR3=000000000f7c4000 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=2039333a39333a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a39333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8171ac7f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028b9e98 RSI=ffffffff8171ac7f RDI=ffff8880145cf530 RBP=ffff8880145cf500 RSP=ffff8880145cf460 R8 =0000000000000001 R9 =ffff8880145cf4a8 R10=0000000000038001 R11=000000000001dda2 R12=ffff8880145cf530 R13=0000000000000000 R14=ffff88800d921b40 R15=0000000000092c40 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbb27391900 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=00007fbb267e8ad0 CR3=000000000d6a6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d0df15d4a74db0c500000000000ae988 XMM05=f97578fa368f40200000000000134710 XMM06=dfcdbad4f1609c370000000000133268 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000