syzkaller login: [ 33.128276] BUG: Bad rss-counter state mm:0000000063a320b1 type:MM_FILEPAGES val:33 [ 33.129330] BUG: Bad rss-counter state mm:0000000063a320b1 type:MM_ANONPAGES val:22 [ 33.293414] ================================================================== [ 33.294550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.295568] Read of size 8 at addr ffff88801a08e3f8 by task sshd/219 [ 33.296493] [ 33.296718] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.297594] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.298621] Call Trace: [ 33.298945] [ 33.299229] dump_stack_lvl+0x91/0xf0 [ 33.299728] print_report+0xcc/0x620 [ 33.300214] ? __virt_addr_valid+0x102/0x340 [ 33.300764] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.301385] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.302004] kasan_report+0xbe/0xf0 [ 33.302498] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.303131] vma_interval_tree_remove+0xc75/0xec0 [ 33.303729] vma_prepare+0xc54/0x11a0 [ 33.304215] __split_vma+0x5af/0x950 [ 33.304692] ? __pfx___split_vma+0x10/0x10 [ 33.305221] ? find_held_lock+0x2c/0x110 [ 33.305747] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.306310] ? lock_is_held_type+0x9f/0x120 [ 33.306868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.307473] ? mtree_range_walk+0x632/0x900 [ 33.308020] ? mas_walk+0x5c7/0x7c0 [ 33.308497] do_vmi_munmap+0x1f1/0x2b0 [ 33.308987] mmap_region+0x1f9/0x2660 [ 33.309468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.309977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.310698] ? __pfx_lock_acquire+0x10/0x10 [ 33.311228] ? __pfx_mmap_region+0x10/0x10 [ 33.311754] ? security_mmap_addr+0x7d/0xa0 [ 33.312281] ? get_unmapped_area+0x1f5/0x3f0 [ 33.312832] do_mmap+0x854/0xf00 [ 33.313270] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.313765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.314325] ksys_mmap_pgoff+0x3af/0x500 [ 33.314850] do_syscall_64+0x3f/0x90 [ 33.315327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.315971] RIP: 0033:0x7fb8c5bd4d82 [ 33.316431] 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 [ 33.318729] RSP: 002b:00007fff8bd3ee68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.319703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8c5bd4d82 [ 33.320593] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8c500e000 [ 33.321494] RBP: 00007fb8c500e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.322393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055565aefcec0 [ 33.323311] R13: 00007fff8bd3ee80 R14: 00007fff8bd3eeb0 R15: 00007fff8bd3f210 [ 33.324233] [ 33.324550] [ 33.324775] Allocated by task 212: [ 33.325236] kasan_save_stack+0x22/0x50 [ 33.325769] kasan_set_track+0x25/0x30 [ 33.326305] __kasan_slab_alloc+0x59/0x70 [ 33.326884] kmem_cache_alloc+0x16b/0x370 [ 33.327436] vm_area_dup+0x20/0x160 [ 33.327926] __split_vma+0x170/0x950 [ 33.328438] split_vma+0xc6/0x110 [ 33.328911] mprotect_fixup+0x8d2/0xb30 [ 33.329453] do_mprotect_pkey+0x87e/0xd40 [ 33.330015] __x64_sys_mprotect+0x78/0xc0 [ 33.330595] do_syscall_64+0x3f/0x90 [ 33.331099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.331775] [ 33.331994] Freed by task 202: [ 33.332388] kasan_save_stack+0x22/0x50 [ 33.332889] kasan_set_track+0x25/0x30 [ 33.333390] kasan_save_free_info+0x2b/0x50 [ 33.333920] __kasan_slab_free+0x10a/0x190 [ 33.334469] kmem_cache_free+0x10d/0x4d0 [ 33.334982] rcu_core+0x8c8/0x2860 [ 33.335427] __do_softirq+0x1b7/0x7d4 [ 33.335918] [ 33.336143] Last potentially related work creation: [ 33.336734] kasan_save_stack+0x22/0x50 [ 33.337313] __kasan_record_aux_stack+0x8e/0xa0 [ 33.337894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.338572] remove_vma+0x139/0x170 [ 33.339025] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.339580] do_vmi_munmap+0x1f1/0x2b0 [ 33.340069] __vm_munmap+0x138/0x3a0 [ 33.340535] __x64_sys_munmap+0x59/0x80 [ 33.341041] do_syscall_64+0x3f/0x90 [ 33.341522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.342160] [ 33.342373] Second to last potentially related work creation: [ 33.343070] kasan_save_stack+0x22/0x50 [ 33.343571] __kasan_record_aux_stack+0x8e/0xa0 [ 33.344168] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.344842] remove_vma+0x139/0x170 [ 33.345296] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.345860] do_vmi_munmap+0x1f1/0x2b0 [ 33.346347] mmap_region+0x1f9/0x2660 [ 33.346828] do_mmap+0x854/0xf00 [ 33.347265] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.347773] ksys_mmap_pgoff+0x3af/0x500 [ 33.348286] do_syscall_64+0x3f/0x90 [ 33.348767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.349422] [ 33.349636] The buggy address belongs to the object at ffff88801a08e3a0 [ 33.349636] which belongs to the cache vm_area_struct of size 168 [ 33.351139] The buggy address is located 88 bytes inside of [ 33.351139] freed 168-byte region [ffff88801a08e3a0, ffff88801a08e448) [ 33.352545] [ 33.352763] The buggy address belongs to the physical page: [ 33.353419] page:0000000034482863 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a08e [ 33.354530] memcg:ffff88801a067601 [ 33.354961] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.355666] page_type: 0xffffffff() [ 33.356250] raw: 0100000000000200 ffff88800879fc80 ffffea0000681f00 0000000000000005 [ 33.357222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a067601 [ 33.358125] page dumped because: kasan: bad access detected [ 33.358806] [ 33.359024] Memory state around the buggy address: [ 33.359599] ffff88801a08e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.360458] ffff88801a08e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.361336] >ffff88801a08e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.362207] ^ [ 33.363199] ffff88801a08e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.364062] ffff88801a08e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.364915] ================================================================== [ 33.365855] Disabling lock debugging due to kernel taint [ 35.380143] BUG: Bad rss-counter state mm:00000000ae11efb1 type:MM_FILEPAGES val:33 [ 35.381327] BUG: Bad rss-counter state mm:00000000ae11efb1 type:MM_ANONPAGES val:22 [ 35.860864] BUG: Bad rss-counter state mm:00000000e48c0c9d type:MM_FILEPAGES val:33 [ 35.861923] BUG: Bad rss-counter state mm:00000000e48c0c9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23514' (ECDSA) to the list of known hosts. 2023/06/20 07:22:05 fuzzer started 2023/06/20 07:22:06 dialing manager at localhost:44161 2023/06/20 07:22:06 checking machine... 2023/06/20 07:22:06 checking revisions... [ 36.593061] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:22:06 testing simple program... [ 36.639497] cgroup: Unknown subsys name 'net' [ 36.678178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:22:04 Registers: info registers vcpu 0 RAX=ffff88806ce09b30 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09a01 RSI=ffff88806ce09a68 RDI=ffff88806ce09a68 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a68 R15=ffff88806ce09a98 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f3900c3a900 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=00007f39011ef650 CR3=000000000c64e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007ffb52fb0cd0 CR3=000000000f4e4000 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=5cec30876941d1b39a444ac4b244d7a7 XMM02=000000000011bff8ec2efd57dc4c00df XMM03=00000000001238682c901dd69bd38804 XMM04=709ed64ae8de2db700000000000ae988 XMM05=dfcdbad4f1609c370000000000134770 XMM06=3659afc3810bb53c00000000001335d8 XMM07=e042d86d42eb936e0000000000123ae8 XMM08=2c901dd69bd38804000000000011c058 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000