syzkaller login: [ 28.921109] BUG: Bad rss-counter state mm:00000000359d734f type:MM_FILEPAGES val:33 [ 28.922387] BUG: Bad rss-counter state mm:00000000359d734f type:MM_ANONPAGES val:22 [ 28.963621] ================================================================== [ 28.964666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.966039] Read of size 8 at addr ffff88800fce53f8 by task sshd/220 [ 28.967144] [ 28.967448] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.968628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.969969] Call Trace: [ 28.970452] [ 28.970843] dump_stack_lvl+0x91/0xf0 [ 28.971516] print_report+0xcc/0x620 [ 28.972177] ? __virt_addr_valid+0x102/0x340 [ 28.972935] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.973812] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974739] kasan_report+0xbe/0xf0 [ 28.975329] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.976084] vma_interval_tree_remove+0xc75/0xec0 [ 28.976805] vma_prepare+0xc54/0x11a0 [ 28.977385] __split_vma+0x5af/0x950 [ 28.977953] ? __pfx___split_vma+0x10/0x10 [ 28.978627] ? find_held_lock+0x2c/0x110 [ 28.979253] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.979924] ? lock_is_held_type+0x9f/0x120 [ 28.980568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.981297] ? mtree_range_walk+0x632/0x900 [ 28.981962] ? mas_walk+0x5c7/0x7c0 [ 28.982585] do_vmi_munmap+0x1f1/0x2b0 [ 28.983180] mmap_region+0x1f9/0x2660 [ 28.983756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.984368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.985218] ? __pfx_lock_acquire+0x10/0x10 [ 28.985856] ? __pfx_mmap_region+0x10/0x10 [ 28.986534] ? security_mmap_addr+0x7d/0xa0 [ 28.987173] ? get_unmapped_area+0x1f5/0x3f0 [ 28.987830] do_mmap+0x854/0xf00 [ 28.988360] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.988950] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.989620] ksys_mmap_pgoff+0x3af/0x500 [ 28.990255] do_syscall_64+0x3f/0x90 [ 28.990943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.991720] RIP: 0033:0x7fa264a3fd82 [ 28.992269] 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 [ 28.994878] RSP: 002b:00007fffe2dacdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.995968] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa264a3fd82 [ 28.996985] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa263e79000 [ 28.998003] RBP: 00007fa263e79000 R08: 0000000000000009 R09: 0000000000001000 [ 28.999045] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557184338f70 [ 29.000059] R13: 00007fffe2dace10 R14: 00007fffe2dace40 R15: 00007fffe2dad1a0 [ 29.001092] [ 29.001444] [ 29.001703] Allocated by task 213: [ 29.002256] kasan_save_stack+0x22/0x50 [ 29.002863] kasan_set_track+0x25/0x30 [ 29.003460] __kasan_slab_alloc+0x59/0x70 [ 29.004087] kmem_cache_alloc+0x16b/0x370 [ 29.004713] vm_area_dup+0x20/0x160 [ 29.005255] __split_vma+0x170/0x950 [ 29.005810] split_vma+0xc6/0x110 [ 29.006371] mprotect_fixup+0x8d2/0xb30 [ 29.006967] do_mprotect_pkey+0x87e/0xd40 [ 29.007588] __x64_sys_mprotect+0x78/0xc0 [ 29.008209] do_syscall_64+0x3f/0x90 [ 29.008773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.009535] [ 29.009787] Freed by task 213: [ 29.010291] kasan_save_stack+0x22/0x50 [ 29.010885] kasan_set_track+0x25/0x30 [ 29.011471] kasan_save_free_info+0x2b/0x50 [ 29.012104] __kasan_slab_free+0x10a/0x190 [ 29.012737] kmem_cache_free+0x10d/0x4d0 [ 29.013342] rcu_core+0x8c8/0x2860 [ 29.013864] __do_softirq+0x1b7/0x7d4 [ 29.014470] [ 29.014726] Last potentially related work creation: [ 29.015440] kasan_save_stack+0x22/0x50 [ 29.016031] __kasan_record_aux_stack+0x8e/0xa0 [ 29.016714] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.017473] remove_vma+0x139/0x170 [ 29.017998] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.018736] do_vmi_munmap+0x1f1/0x2b0 [ 29.019340] __vm_munmap+0x138/0x3a0 [ 29.019884] __x64_sys_munmap+0x59/0x80 [ 29.020456] do_syscall_64+0x3f/0x90 [ 29.021013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.021761] [ 29.022009] The buggy address belongs to the object at ffff88800fce53a0 [ 29.022009] which belongs to the cache vm_area_struct of size 168 [ 29.023735] The buggy address is located 88 bytes inside of [ 29.023735] freed 168-byte region [ffff88800fce53a0, ffff88800fce5448) [ 29.025412] [ 29.025666] The buggy address belongs to the physical page: [ 29.026493] page:00000000f1a960b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfce5 [ 29.027777] memcg:ffff88800fe00a01 [ 29.028284] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.029051] page_type: 0xffffffff() [ 29.029590] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.030729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe00a01 [ 29.031812] page dumped because: kasan: bad access detected [ 29.032601] [ 29.032853] Memory state around the buggy address: [ 29.033548] ffff88800fce5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.034609] ffff88800fce5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.035630] >ffff88800fce5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.036645] ^ [ 29.037649] ffff88800fce5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.038702] ffff88800fce5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.039721] ================================================================== [ 29.041438] Disabling lock debugging due to kernel taint [ 30.860868] BUG: Bad rss-counter state mm:00000000518351c7 type:MM_FILEPAGES val:33 [ 30.861579] BUG: Bad rss-counter state mm:00000000518351c7 type:MM_ANONPAGES val:22 [ 31.246727] BUG: Bad rss-counter state mm:000000002fc70cb0 type:MM_FILEPAGES val:33 [ 31.247470] BUG: Bad rss-counter state mm:000000002fc70cb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23760' (ECDSA) to the list of known hosts. 2023/06/21 05:48:18 fuzzer started 2023/06/21 05:48:18 dialing manager at localhost:36067 2023/06/21 05:48:18 checking machine... 2023/06/21 05:48:18 checking revisions... [ 31.955070] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:48:18 testing simple program... [ 31.995612] cgroup: Unknown subsys name 'net' [ 32.044933] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:18 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=00007fb062513366 RCX=0000000080000101 RDX=1ffff1100d9c135e RSI=ffffffff81007b50 RDI=00007fb062513366 RBP=00007fb062513366 RSP=ffff88806ce09a18 R8 =ffffffff864bbb58 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f00d1c0 R15=ffff8880095de540 RIP=ffffffff814c0871 RFL=00000207 [-----PC] 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 00007fb062020900 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=00007ffcd3063000 CR3=000000000ee62000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fce9d2237b0 CR3=000000000cbd6000 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=1d9429695d354cb10144a4a074916a05 XMM02=ec2efd57dc4c00df000000000011b4b8 XMM03=e08e709633ce017d000000000011b588 XMM04=cd10cebdcbd277bc00000000000ae988 XMM05=59d5b690e0af863b0000000000132120 XMM06=00c3ffa147b8d8570000000000131fa8 XMM07=e042d86d42eb936e00000000001224b0 XMM08=e08e709633ce017d000000000011b588 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000