syzkaller login: [ 31.098277] BUG: Bad rss-counter state mm:000000004a217497 type:MM_FILEPAGES val:33 [ 31.099676] BUG: Bad rss-counter state mm:000000004a217497 type:MM_ANONPAGES val:22 [ 31.248360] ================================================================== [ 31.249441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250598] Read of size 8 at addr ffff888019e4a4e0 by task sshd/220 [ 31.251372] [ 31.251591] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253439] Call Trace: [ 31.253761] [ 31.254051] dump_stack_lvl+0x91/0xf0 [ 31.254557] print_report+0xcc/0x620 [ 31.255042] ? __virt_addr_valid+0x102/0x340 [ 31.255607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256868] kasan_report+0xbe/0xf0 [ 31.257353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257966] vma_interval_tree_remove+0xc75/0xec0 [ 31.258583] vma_prepare+0xc54/0x11a0 [ 31.259066] __split_vma+0x5af/0x950 [ 31.259537] ? __pfx___split_vma+0x10/0x10 [ 31.260062] ? find_held_lock+0x2c/0x110 [ 31.260581] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.261145] ? lock_is_held_type+0x9f/0x120 [ 31.261678] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262297] ? mtree_range_walk+0x632/0x900 [ 31.262843] ? mas_walk+0x5c7/0x7c0 [ 31.263314] do_vmi_munmap+0x1f1/0x2b0 [ 31.263802] mmap_region+0x1f9/0x2660 [ 31.264285] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.264791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.265501] ? __pfx_lock_acquire+0x10/0x10 [ 31.266025] ? __pfx_mmap_region+0x10/0x10 [ 31.266577] ? security_mmap_addr+0x7d/0xa0 [ 31.267100] ? get_unmapped_area+0x1f5/0x3f0 [ 31.267644] do_mmap+0x854/0xf00 [ 31.268085] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.268589] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269150] ksys_mmap_pgoff+0x3af/0x500 [ 31.269655] do_syscall_64+0x3f/0x90 [ 31.270136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.270785] RIP: 0033:0x7fe35960dd82 [ 31.271239] 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 [ 31.273360] RSP: 002b:00007ffd48f87098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.274269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe35960dd82 [ 31.275107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe358a47000 [ 31.275942] RBP: 00007fe358a47000 R08: 0000000000000009 R09: 0000000000001000 [ 31.276780] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdde805980 [ 31.277617] R13: 00007ffd48f870b0 R14: 00007ffd48f870e0 R15: 00007ffd48f87440 [ 31.278484] [ 31.278774] [ 31.278992] Allocated by task 213: [ 31.279423] kasan_save_stack+0x22/0x50 [ 31.279925] kasan_set_track+0x25/0x30 [ 31.280419] __kasan_slab_alloc+0x59/0x70 [ 31.280935] kmem_cache_alloc+0x16b/0x370 [ 31.281448] vm_area_dup+0x20/0x160 [ 31.281898] __split_vma+0x170/0x950 [ 31.282367] split_vma+0xc6/0x110 [ 31.282809] mprotect_fixup+0x8d2/0xb30 [ 31.283312] do_mprotect_pkey+0x87e/0xd40 [ 31.283826] __x64_sys_mprotect+0x78/0xc0 [ 31.284341] do_syscall_64+0x3f/0x90 [ 31.284823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285458] [ 31.285672] Freed by task 213: [ 31.286062] kasan_save_stack+0x22/0x50 [ 31.286587] kasan_set_track+0x25/0x30 [ 31.287085] kasan_save_free_info+0x2b/0x50 [ 31.287619] __kasan_slab_free+0x10a/0x190 [ 31.288144] kmem_cache_free+0x10d/0x4d0 [ 31.288648] rcu_core+0x8c8/0x2860 [ 31.289094] __do_softirq+0x1b7/0x7d4 [ 31.289575] [ 31.289789] Last potentially related work creation: [ 31.290385] kasan_save_stack+0x22/0x50 [ 31.290886] __kasan_record_aux_stack+0x8e/0xa0 [ 31.291457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.292099] remove_vma+0x139/0x170 [ 31.292555] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.293113] do_vmi_munmap+0x1f1/0x2b0 [ 31.293605] __vm_munmap+0x138/0x3a0 [ 31.294067] __x64_sys_munmap+0x59/0x80 [ 31.294577] do_syscall_64+0x3f/0x90 [ 31.295053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295694] [ 31.295908] The buggy address belongs to the object at ffff888019e4a488 [ 31.295908] which belongs to the cache vm_area_struct of size 168 [ 31.297362] The buggy address is located 88 bytes inside of [ 31.297362] freed 168-byte region [ffff888019e4a488, ffff888019e4a530) [ 31.298786] [ 31.299000] The buggy address belongs to the physical page: [ 31.299660] page:000000005e0c67aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e4a [ 31.300749] memcg:ffff88800981d601 [ 31.301176] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.301820] page_type: 0xffffffff() [ 31.302285] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.303194] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800981d601 [ 31.304102] page dumped because: kasan: bad access detected [ 31.304762] [ 31.304977] Memory state around the buggy address: [ 31.305549] ffff888019e4a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.306407] ffff888019e4a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.307263] >ffff888019e4a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.308116] ^ [ 31.308878] ffff888019e4a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.309738] ffff888019e4a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.310600] ================================================================== [ 31.311579] Disabling lock debugging due to kernel taint [ 33.202863] BUG: Bad rss-counter state mm:000000004a82cb99 type:MM_FILEPAGES val:33 [ 33.204565] BUG: Bad rss-counter state mm:000000004a82cb99 type:MM_ANONPAGES val:22 [ 33.725923] BUG: Bad rss-counter state mm:000000007270327b type:MM_FILEPAGES val:33 [ 33.727107] BUG: Bad rss-counter state mm:000000007270327b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53995' (ECDSA) to the list of known hosts. 2023/06/21 10:27:26 fuzzer started 2023/06/21 10:27:26 dialing manager at localhost:36067 2023/06/21 10:27:26 checking machine... 2023/06/21 10:27:26 checking revisions... [ 34.337194] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:27:26 testing simple program... [ 34.382468] cgroup: Unknown subsys name 'net' [ 34.420675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:27:25 Registers: info registers vcpu 0 RAX=ffffffff8180f5d4 RBX=ffffffff85dfe5f4 RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff8880142d7930 R8 =ffffffff8613971a R9 =ffff8880142d7a28 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f8 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000283 [--S---C] 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 00007f6692eb0900 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=00007f66922c5cd0 CR3=000000000d57e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=328c416f813bf33f00000000000ae988 XMM05=9ad14bd6bd1a32fe0000000000132a38 XMM06=4fda316b135da52b0000000000131828 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007f58079d6618 CR3=000000000e0be000 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=37323a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000