syzkaller login: [ 38.844066] BUG: Bad rss-counter state mm:00000000ffd06020 type:MM_FILEPAGES val:33 [ 38.845279] BUG: Bad rss-counter state mm:00000000ffd06020 type:MM_ANONPAGES val:22 [ 38.881025] ================================================================== [ 38.881900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882787] Read of size 8 at addr ffff88801a0373f8 by task sshd/218 [ 38.883617] [ 38.883824] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.884632] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885545] Call Trace: [ 38.885844] [ 38.886112] dump_stack_lvl+0x91/0xf0 [ 38.886574] print_report+0xcc/0x620 [ 38.887034] ? __virt_addr_valid+0x102/0x340 [ 38.887623] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888201] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888782] kasan_report+0xbe/0xf0 [ 38.889231] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889815] vma_interval_tree_remove+0xc75/0xec0 [ 38.890390] vma_prepare+0xc54/0x11a0 [ 38.890838] __split_vma+0x5af/0x950 [ 38.891287] ? __pfx___split_vma+0x10/0x10 [ 38.891797] ? find_held_lock+0x2c/0x110 [ 38.892296] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.892864] ? lock_is_held_type+0x9f/0x120 [ 38.893403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894007] ? mtree_range_walk+0x632/0x900 [ 38.894561] ? mas_walk+0x5c7/0x7c0 [ 38.895028] do_vmi_munmap+0x1f1/0x2b0 [ 38.895522] mmap_region+0x1f9/0x2660 [ 38.896008] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897232] ? __pfx_lock_acquire+0x10/0x10 [ 38.897766] ? __pfx_mmap_region+0x10/0x10 [ 38.898291] ? security_mmap_addr+0x7d/0xa0 [ 38.898814] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899383] do_mmap+0x854/0xf00 [ 38.899824] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900871] ksys_mmap_pgoff+0x3af/0x500 [ 38.901382] do_syscall_64+0x3f/0x90 [ 38.901851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902492] RIP: 0033:0x7f4a9912dd82 [ 38.902948] 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 [ 38.905049] RSP: 002b:00007ffc5806a488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a9912dd82 [ 38.906797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a98567000 [ 38.907653] RBP: 00007f4a98567000 R08: 0000000000000009 R09: 0000000000001000 [ 38.908503] R10: 0000000000000812 R11: 0000000000000206 R12: 000055998a41cf70 [ 38.909346] R13: 00007ffc5806a4a0 R14: 00007ffc5806a4d0 R15: 00007ffc5806a830 [ 38.910203] [ 38.910495] [ 38.910711] Allocated by task 211: [ 38.911138] kasan_save_stack+0x22/0x50 [ 38.911656] kasan_set_track+0x25/0x30 [ 38.912143] __kasan_slab_alloc+0x59/0x70 [ 38.912660] kmem_cache_alloc+0x16b/0x370 [ 38.913180] vm_area_dup+0x20/0x160 [ 38.913625] __split_vma+0x170/0x950 [ 38.914083] split_vma+0xc6/0x110 [ 38.914525] mprotect_fixup+0x8d2/0xb30 [ 38.915024] do_mprotect_pkey+0x87e/0xd40 [ 38.915546] __x64_sys_mprotect+0x78/0xc0 [ 38.916065] do_syscall_64+0x3f/0x90 [ 38.916539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917167] [ 38.917380] Freed by task 211: [ 38.917774] kasan_save_stack+0x22/0x50 [ 38.918276] kasan_set_track+0x25/0x30 [ 38.918775] kasan_save_free_info+0x2b/0x50 [ 38.919303] __kasan_slab_free+0x10a/0x190 [ 38.919854] kmem_cache_free+0x10d/0x4d0 [ 38.920356] rcu_core+0x8c8/0x2860 [ 38.920800] __do_softirq+0x1b7/0x7d4 [ 38.921281] [ 38.921504] Last potentially related work creation: [ 38.922095] kasan_save_stack+0x22/0x50 [ 38.922597] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.923800] remove_vma+0x139/0x170 [ 38.924252] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.924811] do_vmi_munmap+0x1f1/0x2b0 [ 38.925298] __vm_munmap+0x138/0x3a0 [ 38.925762] __x64_sys_munmap+0x59/0x80 [ 38.926253] do_syscall_64+0x3f/0x90 [ 38.926724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927371] [ 38.927587] The buggy address belongs to the object at ffff88801a0373a0 [ 38.927587] which belongs to the cache vm_area_struct of size 168 [ 38.929068] The buggy address is located 88 bytes inside of [ 38.929068] freed 168-byte region [ffff88801a0373a0, ffff88801a037448) [ 38.930484] [ 38.930701] The buggy address belongs to the physical page: [ 38.931383] page:00000000de1ae716 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a037 [ 38.932478] memcg:ffff88800c60ca01 [ 38.932902] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.933551] page_type: 0xffffffff() [ 38.934004] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.934900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c60ca01 [ 38.935806] page dumped because: kasan: bad access detected [ 38.936469] [ 38.936680] Memory state around the buggy address: [ 38.937259] ffff88801a037280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.938114] ffff88801a037300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.938975] >ffff88801a037380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.939823] ^ [ 38.940670] ffff88801a037400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.941526] ffff88801a037480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.942380] ================================================================== [ 38.943447] Disabling lock debugging due to kernel taint [ 40.751791] BUG: Bad rss-counter state mm:00000000c5815d45 type:MM_FILEPAGES val:33 [ 40.753236] BUG: Bad rss-counter state mm:00000000c5815d45 type:MM_ANONPAGES val:22 [ 41.229304] BUG: Bad rss-counter state mm:0000000098219c62 type:MM_FILEPAGES val:33 [ 41.230698] BUG: Bad rss-counter state mm:0000000098219c62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13533' (ECDSA) to the list of known hosts. 2023/06/19 18:32:00 fuzzer started 2023/06/19 18:32:00 dialing manager at localhost:44161 2023/06/19 18:32:00 checking machine... 2023/06/19 18:32:00 checking revisions... [ 41.999023] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:32:00 testing simple program... [ 42.060196] cgroup: Unknown subsys name 'net' [ 42.118582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:32:00 Registers: info registers vcpu 0 RAX=1ffffffff0bc04d2 RBX=ffffffff85e02694 RCX=ffffffff8185b992 RDX=0000000000000000 RSI=ffffffff8613ffb0 RDI=ffffffff85e0266c RBP=ffffffff85e02694 RSP=ffff88800c9bf9e8 R8 =ffffffff8613ffb0 R9 =ffff88800c9bfae0 R10=0000000000038001 R11=00000000000224a6 R12=ffffffff85e02694 R13=ffffffff85e0266c R14=ffffffff85e02690 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f065036e900 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=00007f0650925618 CR3=000000000cee8000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fc1b3380e10 CR3=00000000095ca000 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=055eb735bd986eac1e43a14ec09dc495 XMM02=000000000011e058ec2efd57dc4c00df XMM03=00000000001249f8af22257e2cfdf93a XMM04=9bd5e046eeea760700000000000ae988 XMM05=edc33c18875fc2b50000000000135400 XMM06=bdf2e299e47b49d50000000000134130 XMM07=e042d86d42eb936e0000000000124cd0 XMM08=af22257e2cfdf93a000000000011e0b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000