syzkaller login: [ 30.219615] BUG: Bad rss-counter state mm:00000000ca39f818 type:MM_FILEPAGES val:33 [ 30.220640] BUG: Bad rss-counter state mm:00000000ca39f818 type:MM_ANONPAGES val:22 [ 30.336021] ================================================================== [ 30.336836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.337555] Read of size 8 at addr ffff888018d6a880 by task sshd/222 [ 30.338135] [ 30.338305] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.339119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.339864] Call Trace: [ 30.340105] [ 30.340330] dump_stack_lvl+0x91/0xf0 [ 30.340704] print_report+0xcc/0x620 [ 30.341075] ? __virt_addr_valid+0x102/0x340 [ 30.341498] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.341963] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.342429] kasan_report+0xbe/0xf0 [ 30.342795] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.343275] vma_interval_tree_remove+0xc75/0xec0 [ 30.343733] vma_prepare+0xc54/0x11a0 [ 30.344096] __split_vma+0x5af/0x950 [ 30.344454] ? __pfx___split_vma+0x10/0x10 [ 30.344854] ? find_held_lock+0x2c/0x110 [ 30.345251] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.345680] ? lock_is_held_type+0x9f/0x120 [ 30.346095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.346560] ? mtree_range_walk+0x632/0x900 [ 30.346984] ? mas_walk+0x5c7/0x7c0 [ 30.347375] do_vmi_munmap+0x1f1/0x2b0 [ 30.347749] mmap_region+0x1f9/0x2660 [ 30.348117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.348486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.348949] ? __pfx_lock_acquire+0x10/0x10 [ 30.349296] ? __pfx_mmap_region+0x10/0x10 [ 30.349640] ? security_mmap_addr+0x7d/0xa0 [ 30.349989] ? get_unmapped_area+0x1f5/0x3f0 [ 30.350348] do_mmap+0x854/0xf00 [ 30.350631] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.350952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.351325] ksys_mmap_pgoff+0x3af/0x500 [ 30.351651] do_syscall_64+0x3f/0x90 [ 30.351964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352381] RIP: 0033:0x7f5f45c71d82 [ 30.352675] 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 [ 30.354064] RSP: 002b:00007ffe60bf7d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.354650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f45c71d82 [ 30.355197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f450ab000 [ 30.355765] RBP: 00007f5f450ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.356315] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d65b10d90 [ 30.356873] R13: 00007ffe60bf7d30 R14: 00007ffe60bf7d60 R15: 00007ffe60bf80c0 [ 30.357429] [ 30.357619] [ 30.357757] Allocated by task 214: [ 30.358036] kasan_save_stack+0x22/0x50 [ 30.358365] kasan_set_track+0x25/0x30 [ 30.358688] __kasan_slab_alloc+0x59/0x70 [ 30.359027] kmem_cache_alloc+0x16b/0x370 [ 30.359366] vm_area_dup+0x20/0x160 [ 30.359664] __split_vma+0x170/0x950 [ 30.359964] split_vma+0xc6/0x110 [ 30.360248] mprotect_fixup+0x8d2/0xb30 [ 30.360579] do_mprotect_pkey+0x87e/0xd40 [ 30.360919] __x64_sys_mprotect+0x78/0xc0 [ 30.361262] do_syscall_64+0x3f/0x90 [ 30.361574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361997] [ 30.362134] Freed by task 214: [ 30.362393] kasan_save_stack+0x22/0x50 [ 30.362715] kasan_set_track+0x25/0x30 [ 30.363032] kasan_save_free_info+0x2b/0x50 [ 30.363389] __kasan_slab_free+0x10a/0x190 [ 30.363727] kmem_cache_free+0x10d/0x4d0 [ 30.364055] rcu_core+0x8c8/0x2860 [ 30.364343] __do_softirq+0x1b7/0x7d4 [ 30.364649] [ 30.364785] Last potentially related work creation: [ 30.365162] kasan_save_stack+0x22/0x50 [ 30.365486] __kasan_record_aux_stack+0x8e/0xa0 [ 30.365850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.366264] remove_vma+0x139/0x170 [ 30.366554] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.366911] do_vmi_munmap+0x1f1/0x2b0 [ 30.367224] __vm_munmap+0x138/0x3a0 [ 30.367532] __x64_sys_munmap+0x59/0x80 [ 30.367851] do_syscall_64+0x3f/0x90 [ 30.368154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368565] [ 30.368706] The buggy address belongs to the object at ffff888018d6a828 [ 30.368706] which belongs to the cache vm_area_struct of size 168 [ 30.369661] The buggy address is located 88 bytes inside of [ 30.369661] freed 168-byte region [ffff888018d6a828, ffff888018d6a8d0) [ 30.370577] [ 30.370722] The buggy address belongs to the physical page: [ 30.371161] page:000000001d380af6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d6a [ 30.371907] memcg:ffff8880130fdf01 [ 30.372184] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.372608] page_type: 0xffffffff() [ 30.372901] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.373509] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880130fdf01 [ 30.374115] page dumped because: kasan: bad access detected [ 30.374552] [ 30.374696] Memory state around the buggy address: [ 30.375078] ffff888018d6a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.375654] ffff888018d6a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.376218] >ffff888018d6a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.376778] ^ [ 30.377043] ffff888018d6a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.377605] ffff888018d6a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.378162] ================================================================== [ 30.378823] Disabling lock debugging due to kernel taint [ 32.173596] BUG: Bad rss-counter state mm:000000006608c13a type:MM_FILEPAGES val:33 [ 32.174363] BUG: Bad rss-counter state mm:000000006608c13a type:MM_ANONPAGES val:22 [ 32.630229] BUG: Bad rss-counter state mm:00000000612f12b1 type:MM_FILEPAGES val:33 [ 32.631534] BUG: Bad rss-counter state mm:00000000612f12b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37658' (ECDSA) to the list of known hosts. 2023/06/20 19:32:37 fuzzer started 2023/06/20 19:32:37 dialing manager at localhost:36067 2023/06/20 19:32:37 checking machine... 2023/06/20 19:32:37 checking revisions... [ 33.318515] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:32:37 testing simple program... [ 33.380844] cgroup: Unknown subsys name 'net' [ 33.445394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a70 RCX=0000000000000002 RDX=1ffff1100d9c1350 RSI=ffff88806ce09a68 RDI=ffff88806ce09a80 RBP=ffff88806ce09a68 RSP=ffff88806ce09978 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09a70 R15=ffff88806ce09a70 RIP=ffffffff8113046e 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 00007f813b86f900 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=00007fff7e44c000 CR3=0000000018ea6000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7c637b1b20 CR3=000000000e3a2000 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=202a477d24ef5bb0d9481bb4589d3c46 XMM02=ec2efd57dc4c00df000000000011a0f8 XMM03=affc042b619c898a000000000011a1c8 XMM04=596d45202407962f00000000000ae988 XMM05=59d5b690e0af863b0000000000131498 XMM06=93422007a6872b030000000000130300 XMM07=e042d86d42eb936e0000000000121960 XMM08=affc042b619c898a000000000011a1c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000