syzkaller login: [ 36.749728] BUG: Bad rss-counter state mm:00000000daf11573 type:MM_FILEPAGES val:33 [ 36.751538] BUG: Bad rss-counter state mm:00000000daf11573 type:MM_ANONPAGES val:22 [ 36.923241] ================================================================== [ 36.924196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.925160] Read of size 8 at addr ffff88800dda8ed8 by task sshd/220 [ 36.926114] [ 36.926344] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.927226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.928220] Call Trace: [ 36.928548] [ 36.928834] dump_stack_lvl+0x91/0xf0 [ 36.929333] print_report+0xcc/0x620 [ 36.929823] ? __virt_addr_valid+0x102/0x340 [ 36.930403] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.931044] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.931675] kasan_report+0xbe/0xf0 [ 36.932159] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.932798] vma_interval_tree_remove+0xc75/0xec0 [ 36.933412] vma_prepare+0xc54/0x11a0 [ 36.933901] __split_vma+0x5af/0x950 [ 36.934397] ? __pfx___split_vma+0x10/0x10 [ 36.934944] ? find_held_lock+0x2c/0x110 [ 36.935470] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.936054] ? lock_is_held_type+0x9f/0x120 [ 36.936604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.937228] ? mtree_range_walk+0x632/0x900 [ 36.937789] ? mas_walk+0x5c7/0x7c0 [ 36.938483] do_vmi_munmap+0x1f1/0x2b0 [ 36.939108] mmap_region+0x1f9/0x2660 [ 36.939688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.940301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.941158] ? __pfx_lock_acquire+0x10/0x10 [ 36.941795] ? __pfx_mmap_region+0x10/0x10 [ 36.942532] ? security_mmap_addr+0x7d/0xa0 [ 36.943118] ? get_unmapped_area+0x1f5/0x3f0 [ 36.943693] do_mmap+0x854/0xf00 [ 36.944165] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.944689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.945281] ksys_mmap_pgoff+0x3af/0x500 [ 36.945818] do_syscall_64+0x3f/0x90 [ 36.946336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.947021] RIP: 0033:0x7f082ce3cd82 [ 36.947509] 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 [ 36.949794] RSP: 002b:00007ffcf0ab7158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.950764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f082ce3cd82 [ 36.951664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f082c276000 [ 36.952567] RBP: 00007f082c276000 R08: 0000000000000009 R09: 0000000000001000 [ 36.953470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8be34ef60 [ 36.954396] R13: 00007ffcf0ab7170 R14: 00007ffcf0ab71a0 R15: 00007ffcf0ab7500 [ 36.955322] [ 36.955639] [ 36.955870] Allocated by task 213: [ 36.956323] kasan_save_stack+0x22/0x50 [ 36.956861] kasan_set_track+0x25/0x30 [ 36.957380] __kasan_slab_alloc+0x59/0x70 [ 36.957939] kmem_cache_alloc+0x16b/0x370 [ 36.958496] vm_area_dup+0x20/0x160 [ 36.958977] __split_vma+0x170/0x950 [ 36.959472] split_vma+0xc6/0x110 [ 36.959940] mprotect_fixup+0x8d2/0xb30 [ 36.960464] do_mprotect_pkey+0x87e/0xd40 [ 36.961016] __x64_sys_mprotect+0x78/0xc0 [ 36.961565] do_syscall_64+0x3f/0x90 [ 36.962086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.962769] [ 36.962997] Freed by task 213: [ 36.963415] kasan_save_stack+0x22/0x50 [ 36.963946] kasan_set_track+0x25/0x30 [ 36.964471] kasan_save_free_info+0x2b/0x50 [ 36.965030] __kasan_slab_free+0x10a/0x190 [ 36.965597] kmem_cache_free+0x10d/0x4d0 [ 36.966143] rcu_core+0x8c8/0x2860 [ 36.966614] __do_softirq+0x1b7/0x7d4 [ 36.967198] [ 36.967419] Last potentially related work creation: [ 36.968047] kasan_save_stack+0x22/0x50 [ 36.968591] __kasan_record_aux_stack+0x8e/0xa0 [ 36.969201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.969877] remove_vma+0x139/0x170 [ 36.970378] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.970968] do_vmi_munmap+0x1f1/0x2b0 [ 36.971480] __vm_munmap+0x138/0x3a0 [ 36.971977] __x64_sys_munmap+0x59/0x80 [ 36.972501] do_syscall_64+0x3f/0x90 [ 36.973006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.973686] [ 36.973916] The buggy address belongs to the object at ffff88800dda8e80 [ 36.973916] which belongs to the cache vm_area_struct of size 168 [ 36.975493] The buggy address is located 88 bytes inside of [ 36.975493] freed 168-byte region [ffff88800dda8e80, ffff88800dda8f28) [ 36.976994] [ 36.977227] The buggy address belongs to the physical page: [ 36.977927] page:00000000483f29a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdda8 [ 36.979109] memcg:ffff88800dda9001 [ 36.979558] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.980244] page_type: 0xffffffff() [ 36.980719] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.981696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dda9001 [ 36.982667] page dumped because: kasan: bad access detected [ 36.983370] [ 36.983598] Memory state around the buggy address: [ 36.984222] ffff88800dda8d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.985144] ffff88800dda8e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.986074] >ffff88800dda8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.986980] ^ [ 36.987745] ffff88800dda8f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.988654] ffff88800dda8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.989568] ================================================================== [ 36.990632] Disabling lock debugging due to kernel taint [ 39.074133] BUG: Bad rss-counter state mm:00000000f9cb7056 type:MM_FILEPAGES val:33 [ 39.075461] BUG: Bad rss-counter state mm:00000000f9cb7056 type:MM_ANONPAGES val:22 [ 39.559659] BUG: Bad rss-counter state mm:00000000a8f68cd2 type:MM_FILEPAGES val:33 [ 39.560835] BUG: Bad rss-counter state mm:00000000a8f68cd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54858' (ECDSA) to the list of known hosts. 2023/06/20 02:12:56 fuzzer started 2023/06/20 02:12:56 dialing manager at localhost:44161 2023/06/20 02:12:56 checking machine... 2023/06/20 02:12:56 checking revisions... [ 40.237234] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:12:56 testing simple program... [ 40.290676] cgroup: Unknown subsys name 'net' [ 40.343831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:12:54 Registers: info registers vcpu 0 RAX=1ffffffff0bb437a RBX=ffffffff85da1bd0 RCX=ffffffff8121b36a RDX=0000000000000000 RSI=ffffffff860aefc6 RDI=ffffffff85da1bd0 RBP=ffffffff85da1bd0 RSP=ffff888008d7f8c0 R8 =ffffffff860aefc6 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000a1ff R12=ffffffff85da1bd0 R13=ffffffff85da1bd0 R14=ffffffff85da1bd0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 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=00007ffc09d07908 CR3=000000000ea3a000 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=32313a3230203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035353a3231 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffff888008e579d0 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff888008e57a04 RBP=ffff888008e579c8 RSP=ffff888008e57930 R8 =0000000000000001 R9 =ffff888008e57970 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e579f8 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800f29e680 RIP=ffffffff810bd047 RFL=00000286 [--S--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 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=00007fcc9278c01c CR3=000000000d840000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000