syzkaller login: [ 30.922825] BUG: Bad rss-counter state mm:0000000046b6fdea type:MM_FILEPAGES val:33 [ 30.923767] BUG: Bad rss-counter state mm:0000000046b6fdea type:MM_ANONPAGES val:22 [ 31.041867] ================================================================== [ 31.042498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.043126] Read of size 8 at addr ffff88800e607ed8 by task sshd/221 [ 31.043642] [ 31.043801] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.044423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.045070] Call Trace: [ 31.045285] [ 31.045475] dump_stack_lvl+0x91/0xf0 [ 31.045796] print_report+0xcc/0x620 [ 31.046109] ? __virt_addr_valid+0x102/0x340 [ 31.046657] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.047067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.047464] kasan_report+0xbe/0xf0 [ 31.047776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048218] vma_interval_tree_remove+0xc75/0xec0 [ 31.048647] vma_prepare+0xc54/0x11a0 [ 31.048960] __split_vma+0x5af/0x950 [ 31.049286] ? __pfx___split_vma+0x10/0x10 [ 31.049656] ? find_held_lock+0x2c/0x110 [ 31.050012] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.050384] ? lock_is_held_type+0x9f/0x120 [ 31.050750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.051148] ? mtree_range_walk+0x632/0x900 [ 31.051508] ? mas_walk+0x5c7/0x7c0 [ 31.051812] do_vmi_munmap+0x1f1/0x2b0 [ 31.052195] mmap_region+0x1f9/0x2660 [ 31.052514] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.052866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.053357] ? __pfx_lock_acquire+0x10/0x10 [ 31.053739] ? __pfx_mmap_region+0x10/0x10 [ 31.054085] ? security_mmap_addr+0x7d/0xa0 [ 31.054415] ? get_unmapped_area+0x1f5/0x3f0 [ 31.054774] do_mmap+0x854/0xf00 [ 31.055068] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.055403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.055786] ksys_mmap_pgoff+0x3af/0x500 [ 31.056165] do_syscall_64+0x3f/0x90 [ 31.056488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.056927] RIP: 0033:0x7f785a5e9d82 [ 31.057227] 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 [ 31.058605] RSP: 002b:00007ffd438b6d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.059185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f785a5e9d82 [ 31.059759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7859a23000 [ 31.060370] RBP: 00007f7859a23000 R08: 0000000000000009 R09: 0000000000001000 [ 31.060952] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595f2b5bec0 [ 31.061516] R13: 00007ffd438b6da0 R14: 00007ffd438b6dd0 R15: 00007ffd438b7130 [ 31.062071] [ 31.062262] [ 31.062401] Allocated by task 214: [ 31.062690] kasan_save_stack+0x22/0x50 [ 31.063024] kasan_set_track+0x25/0x30 [ 31.063345] __kasan_slab_alloc+0x59/0x70 [ 31.063690] kmem_cache_alloc+0x16b/0x370 [ 31.064078] vm_area_dup+0x20/0x160 [ 31.064372] __split_vma+0x170/0x950 [ 31.064706] split_vma+0xc6/0x110 [ 31.065013] mprotect_fixup+0x8d2/0xb30 [ 31.065349] do_mprotect_pkey+0x87e/0xd40 [ 31.065753] __x64_sys_mprotect+0x78/0xc0 [ 31.066091] do_syscall_64+0x3f/0x90 [ 31.066389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066808] [ 31.066949] Freed by task 19: [ 31.067194] kasan_save_stack+0x22/0x50 [ 31.067514] kasan_set_track+0x25/0x30 [ 31.067826] kasan_save_free_info+0x2b/0x50 [ 31.068194] __kasan_slab_free+0x10a/0x190 [ 31.068523] kmem_cache_free+0x10d/0x4d0 [ 31.068852] rcu_core+0x8c8/0x2860 [ 31.069130] __do_softirq+0x1b7/0x7d4 [ 31.069431] [ 31.069570] Last potentially related work creation: [ 31.069939] kasan_save_stack+0x22/0x50 [ 31.070261] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071057] remove_vma+0x139/0x170 [ 31.071355] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.071714] do_vmi_munmap+0x1f1/0x2b0 [ 31.072057] __vm_munmap+0x138/0x3a0 [ 31.072366] __x64_sys_munmap+0x59/0x80 [ 31.072686] do_syscall_64+0x3f/0x90 [ 31.072991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073402] [ 31.073542] Second to last potentially related work creation: [ 31.074019] kasan_save_stack+0x22/0x50 [ 31.074366] __kasan_record_aux_stack+0x8e/0xa0 [ 31.074743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.075165] remove_vma+0x139/0x170 [ 31.075459] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.075824] do_vmi_munmap+0x1f1/0x2b0 [ 31.076206] __vm_munmap+0x138/0x3a0 [ 31.076501] __x64_sys_munmap+0x59/0x80 [ 31.076823] do_syscall_64+0x3f/0x90 [ 31.077119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077521] [ 31.077662] The buggy address belongs to the object at ffff88800e607e80 [ 31.077662] which belongs to the cache vm_area_struct of size 168 [ 31.078596] The buggy address is located 88 bytes inside of [ 31.078596] freed 168-byte region [ffff88800e607e80, ffff88800e607f28) [ 31.079468] [ 31.079602] The buggy address belongs to the physical page: [ 31.080078] page:00000000b1ea6cb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe607 [ 31.080790] memcg:ffff88800e0ce801 [ 31.081069] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.081629] page_type: 0xffffffff() [ 31.081937] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bdb00 dead000000000007 [ 31.082558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0ce801 [ 31.083327] page dumped because: kasan: bad access detected [ 31.083773] [ 31.083990] Memory state around the buggy address: [ 31.084384] ffff88800e607d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.084972] ffff88800e607e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.085622] >ffff88800e607e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.086310] ^ [ 31.086817] ffff88800e607f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.087408] ffff88800e607f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.088069] ================================================================== [ 31.088871] Disabling lock debugging due to kernel taint [ 32.509375] BUG: Bad rss-counter state mm:000000004fbff142 type:MM_FILEPAGES val:33 [ 32.510056] BUG: Bad rss-counter state mm:000000004fbff142 type:MM_ANONPAGES val:22 [ 32.894593] BUG: Bad rss-counter state mm:000000000f98eac6 type:MM_FILEPAGES val:33 [ 32.895272] BUG: Bad rss-counter state mm:000000000f98eac6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25753' (ECDSA) to the list of known hosts. 2023/06/21 09:47:08 fuzzer started 2023/06/21 09:47:08 dialing manager at localhost:36067 2023/06/21 09:47:08 checking machine... 2023/06/21 09:47:08 checking revisions... [ 33.475021] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:47:08 testing simple program... [ 33.508561] cgroup: Unknown subsys name 'net' [ 33.557263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:08 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=00007f07a3f82860 CR3=000000000c84c000 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=f798ce1c72111aa7d846deacdb186028 XMM02=000000000011b008eff9b2d0a8fce9cb XMM03=000000000011b0d82c67c8bc2e329bc3 XMM04=d046ac0cbf19257c00000000000ae988 XMM05=6760e1eca63cf4900000000000134290 XMM06=c291bd5c70af25b90000000000133330 XMM07=e042d86d42eb936e00000000001227d0 XMM08=4dcbd15005a9ca69000000000011b0d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f3a74e0 RCX=0000000000000001 RDX=1ffff11001e74eb8 RSI=ffffffff846000aa RDI=ffff88800f3a74ec RBP=ffff88800f3a75c0 RSP=ffff88800f3a73f8 R8 =0000000000000001 R9 =ffff88800f3a7458 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800f3a74e0 R13=0000000000000000 R14=ffff88800db43680 R15=0000000000000000 RIP=ffffffff813ad547 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 00007f1fa1e05900 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=00007ffc8f5ce000 CR3=000000000de32000 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