syzkaller login: [ 33.373584] BUG: Bad rss-counter state mm:000000004ea16a6b type:MM_FILEPAGES val:33 [ 33.374796] BUG: Bad rss-counter state mm:000000004ea16a6b type:MM_ANONPAGES val:22 [ 33.507637] ================================================================== [ 33.508555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.509499] Read of size 8 at addr ffff888019e8b968 by task sshd/220 [ 33.510355] [ 33.510580] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.511443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.512410] Call Trace: [ 33.512728] [ 33.513010] dump_stack_lvl+0x91/0xf0 [ 33.513501] print_report+0xcc/0x620 [ 33.513977] ? __virt_addr_valid+0x102/0x340 [ 33.514534] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.515136] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.515766] kasan_report+0xbe/0xf0 [ 33.516248] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.516864] vma_interval_tree_remove+0xc75/0xec0 [ 33.517463] vma_prepare+0xc54/0x11a0 [ 33.517943] __split_vma+0x5af/0x950 [ 33.518411] ? __pfx___split_vma+0x10/0x10 [ 33.518961] ? find_held_lock+0x2c/0x110 [ 33.519478] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.520040] ? lock_is_held_type+0x9f/0x120 [ 33.520573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.521182] ? mtree_range_walk+0x632/0x900 [ 33.521734] ? mas_walk+0x5c7/0x7c0 [ 33.522205] do_vmi_munmap+0x1f1/0x2b0 [ 33.522703] mmap_region+0x1f9/0x2660 [ 33.523180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.523696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.524400] ? __pfx_lock_acquire+0x10/0x10 [ 33.524934] ? __pfx_mmap_region+0x10/0x10 [ 33.525470] ? security_mmap_addr+0x7d/0xa0 [ 33.525997] ? get_unmapped_area+0x1f5/0x3f0 [ 33.526565] do_mmap+0x854/0xf00 [ 33.527000] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.527494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.528052] ksys_mmap_pgoff+0x3af/0x500 [ 33.528552] do_syscall_64+0x3f/0x90 [ 33.529030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.529670] RIP: 0033:0x7f959a451d82 [ 33.530121] 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 [ 33.532259] RSP: 002b:00007ffcc02e9818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.533173] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f959a451d82 [ 33.534027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f959988b000 [ 33.534888] RBP: 00007f959988b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.535735] R10: 0000000000000812 R11: 0000000000000206 R12: 000055679e275f60 [ 33.536595] R13: 00007ffcc02e9830 R14: 00007ffcc02e9860 R15: 00007ffcc02e9bc0 [ 33.537455] [ 33.537748] [ 33.537964] Allocated by task 213: [ 33.538387] kasan_save_stack+0x22/0x50 [ 33.538917] kasan_set_track+0x25/0x30 [ 33.539400] __kasan_slab_alloc+0x59/0x70 [ 33.539921] kmem_cache_alloc+0x16b/0x370 [ 33.540432] vm_area_dup+0x20/0x160 [ 33.540884] __split_vma+0x170/0x950 [ 33.541352] split_vma+0xc6/0x110 [ 33.541797] mprotect_fixup+0x8d2/0xb30 [ 33.542291] do_mprotect_pkey+0x87e/0xd40 [ 33.542815] __x64_sys_mprotect+0x78/0xc0 [ 33.543330] do_syscall_64+0x3f/0x90 [ 33.543805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.544442] [ 33.544656] Freed by task 13: [ 33.545038] kasan_save_stack+0x22/0x50 [ 33.545533] kasan_set_track+0x25/0x30 [ 33.546037] kasan_save_free_info+0x2b/0x50 [ 33.546588] __kasan_slab_free+0x10a/0x190 [ 33.547119] kmem_cache_free+0x10d/0x4d0 [ 33.547635] rcu_core+0x8c8/0x2860 [ 33.548076] __do_softirq+0x1b7/0x7d4 [ 33.548548] [ 33.548765] Last potentially related work creation: [ 33.549347] kasan_save_stack+0x22/0x50 [ 33.549852] __kasan_record_aux_stack+0x8e/0xa0 [ 33.550424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.551075] remove_vma+0x139/0x170 [ 33.551525] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.552076] do_vmi_munmap+0x1f1/0x2b0 [ 33.552561] __vm_munmap+0x138/0x3a0 [ 33.553027] __x64_sys_munmap+0x59/0x80 [ 33.553521] do_syscall_64+0x3f/0x90 [ 33.553989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.554639] [ 33.554858] The buggy address belongs to the object at ffff888019e8b910 [ 33.554858] which belongs to the cache vm_area_struct of size 168 [ 33.556310] The buggy address is located 88 bytes inside of [ 33.556310] freed 168-byte region [ffff888019e8b910, ffff888019e8b9b8) [ 33.557710] [ 33.557924] The buggy address belongs to the physical page: [ 33.558648] page:0000000096d28508 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e8b [ 33.559786] memcg:ffff88800da80001 [ 33.560214] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.560874] page_type: 0xffffffff() [ 33.561323] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.562252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da80001 [ 33.563193] page dumped because: kasan: bad access detected [ 33.563861] [ 33.564076] Memory state around the buggy address: [ 33.564671] ffff888019e8b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.565578] ffff888019e8b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.566493] >ffff888019e8b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.567375] ^ [ 33.568180] ffff888019e8b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.569060] ffff888019e8ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.569925] ================================================================== [ 33.570954] Disabling lock debugging due to kernel taint [ 35.962057] BUG: Bad rss-counter state mm:0000000076f08c0e type:MM_FILEPAGES val:33 [ 35.963258] BUG: Bad rss-counter state mm:0000000076f08c0e type:MM_ANONPAGES val:22 [ 36.445205] BUG: Bad rss-counter state mm:00000000fc85ee7d type:MM_FILEPAGES val:33 [ 36.446380] BUG: Bad rss-counter state mm:00000000fc85ee7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13751' (ECDSA) to the list of known hosts. 2023/06/19 22:38:19 fuzzer started 2023/06/19 22:38:19 dialing manager at localhost:44161 2023/06/19 22:38:19 checking machine... 2023/06/19 22:38:19 checking revisions... [ 37.190349] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:38:19 testing simple program... [ 37.233109] cgroup: Unknown subsys name 'net' [ 37.297942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:38:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea00003b2e80 RCX=0000000000000100 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff888008d7fc70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffffffff81845c80 R13=ffffea0000342b80 R14=ffffffff8186b9c5 R15=ffff88800e3f3680 RIP=ffffffff8180c49b 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 =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=00007f12c3b292e0 CR3=000000000d5ce000 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=9c343f1366ca4d8a774a6ba363b42b8d XMM02=ec2efd57dc4c00df000000000011c8d8 XMM03=391407d3cae38bed000000000011c9a8 XMM04=df9cf844ef1f89f000000000000ae988 XMM05=19e9129bd510f2350000000000133958 XMM06=4bd7be7c42a31d7c00000000001327c0 XMM07=e042d86d42eb936e0000000000124030 XMM08=391407d3cae38bed000000000011c9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea000033dd80 RCX=0000000000000100 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff888008e57c90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffffffff81845c80 R13=ffffea0000633500 R14=ffffffff813782a8 R15=ffff88800e3f3680 RIP=ffffffff8180c49b 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 =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=00007fffa4e11000 CR3=000000000e1ea000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000