syzkaller login: [ 38.741265] BUG: Bad rss-counter state mm:000000005b284294 type:MM_FILEPAGES val:33 [ 38.742613] BUG: Bad rss-counter state mm:000000005b284294 type:MM_ANONPAGES val:22 [ 38.901542] ================================================================== [ 38.902444] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.903397] Read of size 8 at addr ffff888019508ed8 by task sshd/219 [ 38.904159] [ 38.904377] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.905417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.906391] Call Trace: [ 38.906749] <TASK> [ 38.907052] dump_stack_lvl+0x91/0xf0 [ 38.907542] print_report+0xcc/0x620 [ 38.908025] ? __virt_addr_valid+0x102/0x340 [ 38.908576] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909202] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909829] kasan_report+0xbe/0xf0 [ 38.910314] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.910960] vma_interval_tree_remove+0xc75/0xec0 [ 38.911573] vma_prepare+0xc54/0x11a0 [ 38.912049] __split_vma+0x5af/0x950 [ 38.912531] ? __pfx___split_vma+0x10/0x10 [ 38.913069] ? find_held_lock+0x2c/0x110 [ 38.913587] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.914153] ? lock_is_held_type+0x9f/0x120 [ 38.914713] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.915328] ? mtree_range_walk+0x632/0x900 [ 38.915884] ? mas_walk+0x5c7/0x7c0 [ 38.916371] do_vmi_munmap+0x1f1/0x2b0 [ 38.916877] mmap_region+0x1f9/0x2660 [ 38.917358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.917871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.918612] ? __pfx_lock_acquire+0x10/0x10 [ 38.919159] ? __pfx_mmap_region+0x10/0x10 [ 38.919695] ? security_mmap_addr+0x7d/0xa0 [ 38.920228] ? get_unmapped_area+0x1f5/0x3f0 [ 38.920786] do_mmap+0x854/0xf00 [ 38.921226] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.921724] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.922292] ksys_mmap_pgoff+0x3af/0x500 [ 38.922829] do_syscall_64+0x3f/0x90 [ 38.923311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923967] RIP: 0033:0x7ffba8a9ad82 [ 38.924434] 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 [ 38.926628] RSP: 002b:00007ffc69b5b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.927539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffba8a9ad82 [ 38.928396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffba7ed4000 [ 38.929253] RBP: 00007ffba7ed4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.930110] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557bfff5ec0 [ 38.930998] R13: 00007ffc69b5b860 R14: 00007ffc69b5b890 R15: 00007ffc69b5bbf0 [ 38.931856] </TASK> [ 38.932159] [ 38.932378] Allocated by task 212: [ 38.932811] kasan_save_stack+0x22/0x50 [ 38.933328] kasan_set_track+0x25/0x30 [ 38.933844] __kasan_slab_alloc+0x59/0x70 [ 38.934372] kmem_cache_alloc+0x16b/0x370 [ 38.934912] vm_area_dup+0x20/0x160 [ 38.935375] __split_vma+0x170/0x950 [ 38.935846] split_vma+0xc6/0x110 [ 38.936300] mprotect_fixup+0x8d2/0xb30 [ 38.936812] do_mprotect_pkey+0x87e/0xd40 [ 38.937339] __x64_sys_mprotect+0x78/0xc0 [ 38.937870] do_syscall_64+0x3f/0x90 [ 38.938361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939026] [ 38.939241] Freed by task 212: [ 38.939637] kasan_save_stack+0x22/0x50 [ 38.940154] kasan_set_track+0x25/0x30 [ 38.940649] kasan_save_free_info+0x2b/0x50 [ 38.941182] __kasan_slab_free+0x10a/0x190 [ 38.941725] kmem_cache_free+0x10d/0x4d0 [ 38.942241] rcu_core+0x8c8/0x2860 [ 38.942715] __do_softirq+0x1b7/0x7d4 [ 38.943204] [ 38.943418] Last potentially related work creation: [ 38.944007] kasan_save_stack+0x22/0x50 [ 38.944517] __kasan_record_aux_stack+0x8e/0xa0 [ 38.945096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.945752] remove_vma+0x139/0x170 [ 38.946272] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.946856] do_vmi_munmap+0x1f1/0x2b0 [ 38.947345] __vm_munmap+0x138/0x3a0 [ 38.947812] __x64_sys_munmap+0x59/0x80 [ 38.948360] do_syscall_64+0x3f/0x90 [ 38.948854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949499] [ 38.949718] Second to last potentially related work creation: [ 38.950406] kasan_save_stack+0x22/0x50 [ 38.950932] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952153] remove_vma+0x139/0x170 [ 38.952630] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953180] do_vmi_munmap+0x1f1/0x2b0 [ 38.953670] mmap_region+0x1f9/0x2660 [ 38.954156] do_mmap+0x854/0xf00 [ 38.954626] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.955161] ksys_mmap_pgoff+0x3af/0x500 [ 38.955685] do_syscall_64+0x3f/0x90 [ 38.956194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956878] [ 38.957096] The buggy address belongs to the object at ffff888019508e80 [ 38.957096] which belongs to the cache vm_area_struct of size 168 [ 38.958597] The buggy address is located 88 bytes inside of [ 38.958597] freed 168-byte region [ffff888019508e80, ffff888019508f28) [ 38.959995] [ 38.960222] The buggy address belongs to the physical page: [ 38.960896] page:0000000020ae09fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19508 [ 38.961982] memcg:ffff888015c12f01 [ 38.962419] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.963134] page_type: 0xffffffff() [ 38.963605] raw: 0100000000000200 ffff8880087a0c80 ffffea000032f800 dead000000000007 [ 38.964532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c12f01 [ 38.965440] page dumped because: kasan: bad access detected [ 38.966108] [ 38.966330] Memory state around the buggy address: [ 38.966945] ffff888019508d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.967863] ffff888019508e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.968729] >ffff888019508e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.969640] ^ [ 38.970410] ffff888019508f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.971322] ffff888019508f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.972225] ================================================================== [ 38.973487] Disabling lock debugging due to kernel taint [ 41.341102] BUG: Bad rss-counter state mm:00000000d71df06a type:MM_FILEPAGES val:33 [ 41.342324] BUG: Bad rss-counter state mm:00000000d71df06a type:MM_ANONPAGES val:22 [ 41.797504] BUG: Bad rss-counter state mm:0000000090ff1599 type:MM_FILEPAGES val:33 [ 41.798561] BUG: Bad rss-counter state mm:0000000090ff1599 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54060' (ECDSA) to the list of known hosts. 2023/06/21 03:44:10 fuzzer started 2023/06/21 03:44:10 dialing manager at localhost:36067 2023/06/21 03:44:10 checking machine... 2023/06/21 03:44:10 checking revisions... [ 42.441036] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:44:10 testing simple program... [ 42.491353] cgroup: Unknown subsys name 'net' [ 42.554099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:44:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880196b7548 RCX=ffffffff86138e01 RDX=1ffff110032d6eb4 RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffff8880196b75a0 RSP=ffff8880196b7530 R8 =ffffffff86138e90 R9 =ffff8880196b7588 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880196b7610 R13=0000000000000000 R14=ffff88800d9c3680 R15=ffff88800daa4300 RIP=ffffffff811303b2 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 00007fc12e4c6700 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=00007fdb6e6860b0 CR3=000000000fcbe000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732030313a3434 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=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=00007fa5c84fc630 CR3=000000000d6f2000 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=f9be5aa0e2f60487bb4bf9fb794f8153 XMM02=2c67c8bc2e329bc3000000000011b068 XMM03=fb795ef6d65770560000000000121a08 XMM04=bdea63165ecce82800000000000ae988 XMM05=d6e22147b3e1748700000000001337d8 XMM06=806171799158d9670000000000132800 XMM07=e042d86d42eb936e0000000000121ce0 XMM08=e493ba9961a4c2d0000000000011b0c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000