syzkaller login: [ 31.175763] BUG: Bad rss-counter state mm:00000000aa8ea4bf type:MM_FILEPAGES val:33 [ 31.176768] BUG: Bad rss-counter state mm:00000000aa8ea4bf type:MM_ANONPAGES val:22 [ 31.344640] ================================================================== [ 31.345551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.346484] Read of size 8 at addr ffff88800e3ce6b0 by task sshd/220 [ 31.347253] [ 31.347469] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.348483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.349465] Call Trace: [ 31.349785] [ 31.350080] dump_stack_lvl+0x91/0xf0 [ 31.350587] print_report+0xcc/0x620 [ 31.351077] ? __virt_addr_valid+0x102/0x340 [ 31.351632] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352276] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352894] kasan_report+0xbe/0xf0 [ 31.353362] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353974] vma_interval_tree_remove+0xc75/0xec0 [ 31.354571] vma_prepare+0xc54/0x11a0 [ 31.355043] __split_vma+0x5af/0x950 [ 31.355510] ? __pfx___split_vma+0x10/0x10 [ 31.356049] ? find_held_lock+0x2c/0x110 [ 31.356563] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357125] ? lock_is_held_type+0x9f/0x120 [ 31.357661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358270] ? mtree_range_walk+0x632/0x900 [ 31.358817] ? mas_walk+0x5c7/0x7c0 [ 31.359289] do_vmi_munmap+0x1f1/0x2b0 [ 31.359785] mmap_region+0x1f9/0x2660 [ 31.360261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.360778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.361506] ? __pfx_lock_acquire+0x10/0x10 [ 31.362046] ? __pfx_mmap_region+0x10/0x10 [ 31.362573] ? security_mmap_addr+0x7d/0xa0 [ 31.363107] ? get_unmapped_area+0x1f5/0x3f0 [ 31.363658] do_mmap+0x854/0xf00 [ 31.364117] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.364619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.365179] ksys_mmap_pgoff+0x3af/0x500 [ 31.365679] do_syscall_64+0x3f/0x90 [ 31.366158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366795] RIP: 0033:0x7f01541e6d82 [ 31.367248] 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 [ 31.369360] RSP: 002b:00007ffda4358dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.370253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01541e6d82 [ 31.371094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0153620000 [ 31.371952] RBP: 00007f0153620000 R08: 0000000000000009 R09: 0000000000001000 [ 31.372782] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3261bdec0 [ 31.373626] R13: 00007ffda4358df0 R14: 00007ffda4358e20 R15: 00007ffda4359180 [ 31.374484] [ 31.374776] [ 31.374992] Allocated by task 213: [ 31.375422] kasan_save_stack+0x22/0x50 [ 31.375929] kasan_set_track+0x25/0x30 [ 31.376431] __kasan_slab_alloc+0x59/0x70 [ 31.376950] kmem_cache_alloc+0x16b/0x370 [ 31.377468] vm_area_dup+0x20/0x160 [ 31.377920] __split_vma+0x170/0x950 [ 31.378382] split_vma+0xc6/0x110 [ 31.378869] mprotect_fixup+0x8d2/0xb30 [ 31.379461] do_mprotect_pkey+0x87e/0xd40 [ 31.380020] __x64_sys_mprotect+0x78/0xc0 [ 31.380542] do_syscall_64+0x3f/0x90 [ 31.381017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381650] [ 31.381870] Freed by task 213: [ 31.382255] kasan_save_stack+0x22/0x50 [ 31.382750] kasan_set_track+0x25/0x30 [ 31.383242] kasan_save_free_info+0x2b/0x50 [ 31.383783] __kasan_slab_free+0x10a/0x190 [ 31.384312] kmem_cache_free+0x10d/0x4d0 [ 31.384820] rcu_core+0x8c8/0x2860 [ 31.385273] __do_softirq+0x1b7/0x7d4 [ 31.385745] [ 31.385963] Last potentially related work creation: [ 31.386548] kasan_save_stack+0x22/0x50 [ 31.387048] __kasan_record_aux_stack+0x8e/0xa0 [ 31.387621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.388270] remove_vma+0x139/0x170 [ 31.388722] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.389278] do_vmi_munmap+0x1f1/0x2b0 [ 31.389854] __vm_munmap+0x138/0x3a0 [ 31.390323] __x64_sys_munmap+0x59/0x80 [ 31.390813] do_syscall_64+0x3f/0x90 [ 31.391282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.391935] [ 31.392152] Second to last potentially related work creation: [ 31.392819] kasan_save_stack+0x22/0x50 [ 31.393319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.393889] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.394525] remove_vma+0x139/0x170 [ 31.394974] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.395521] do_vmi_munmap+0x1f1/0x2b0 [ 31.396008] mmap_region+0x1f9/0x2660 [ 31.396487] do_mmap+0x854/0xf00 [ 31.396918] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.397404] ksys_mmap_pgoff+0x7d/0x500 [ 31.397895] do_syscall_64+0x3f/0x90 [ 31.398370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399007] [ 31.399222] The buggy address belongs to the object at ffff88800e3ce658 [ 31.399222] which belongs to the cache vm_area_struct of size 168 [ 31.400701] The buggy address is located 88 bytes inside of [ 31.400701] freed 168-byte region [ffff88800e3ce658, ffff88800e3ce700) [ 31.402102] [ 31.402320] The buggy address belongs to the physical page: [ 31.402983] page:000000006ea85b65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ce [ 31.404062] memcg:ffff88800df28101 [ 31.404484] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.405126] page_type: 0xffffffff() [ 31.405576] raw: 0100000000000200 ffff8880087a0c80 ffffea00005608c0 dead000000000008 [ 31.406526] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df28101 [ 31.407421] page dumped because: kasan: bad access detected [ 31.408094] [ 31.408312] Memory state around the buggy address: [ 31.408898] ffff88800e3ce580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.409767] ffff88800e3ce600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.410634] >ffff88800e3ce680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.411484] ^ [ 31.412072] ffff88800e3ce700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.412932] ffff88800e3ce780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.413775] ================================================================== [ 31.414703] Disabling lock debugging due to kernel taint [ 33.511031] BUG: Bad rss-counter state mm:000000005a857c23 type:MM_FILEPAGES val:33 [ 33.512243] BUG: Bad rss-counter state mm:000000005a857c23 type:MM_ANONPAGES val:22 [ 33.997974] BUG: Bad rss-counter state mm:000000008f902faf type:MM_FILEPAGES val:33 [ 33.999131] BUG: Bad rss-counter state mm:000000008f902faf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2755' (ECDSA) to the list of known hosts. 2023/06/20 22:29:02 fuzzer started 2023/06/20 22:29:02 dialing manager at localhost:36067 2023/06/20 22:29:02 checking machine... 2023/06/20 22:29:02 checking revisions... [ 34.707954] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:29:02 testing simple program... [ 34.760872] cgroup: Unknown subsys name 'net' [ 34.821693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:29:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000000a4 RCX=0000000000000000 RDX=1ffff110018bb006 RSI=ffff88800c744a00 RDI=ffffffff87f97640 RBP=ffff88800c5d8000 RSP=ffff88800ca776a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000008eb000008eb R12=ffff88800c744a00 R13=0000000000000000 R14=ffff88800c5d8579 R15=ffff88800c5d8600 RIP=ffffffff838640f2 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 00007fc7e5a69900 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=00007fc7e6020618 CR3=000000001bf1c000 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=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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ffe94e14818 CR3=000000000db48000 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=2032303a39323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000