syzkaller login: [ 28.784233] BUG: Bad rss-counter state mm:000000005534c769 type:MM_FILEPAGES val:33 [ 28.785459] BUG: Bad rss-counter state mm:000000005534c769 type:MM_ANONPAGES val:22 [ 28.898257] ================================================================== [ 28.898956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.899679] Read of size 8 at addr ffff88800dfecd08 by task sshd/219 [ 28.900271] [ 28.900437] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.901098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.901947] Call Trace: [ 28.902195] [ 28.902414] dump_stack_lvl+0x91/0xf0 [ 28.902788] print_report+0xcc/0x620 [ 28.903172] ? __virt_addr_valid+0x102/0x340 [ 28.903593] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904067] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904540] kasan_report+0xbe/0xf0 [ 28.904901] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.905377] vma_interval_tree_remove+0xc75/0xec0 [ 28.905835] vma_prepare+0xc54/0x11a0 [ 28.906205] __split_vma+0x5af/0x950 [ 28.906568] ? __pfx___split_vma+0x10/0x10 [ 28.906986] ? find_held_lock+0x2c/0x110 [ 28.907345] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.907677] ? lock_is_held_type+0x9f/0x120 [ 28.907991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.908353] ? mtree_range_walk+0x632/0x900 [ 28.908672] ? mas_walk+0x5c7/0x7c0 [ 28.908946] do_vmi_munmap+0x1f1/0x2b0 [ 28.909242] mmap_region+0x1f9/0x2660 [ 28.909533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.909838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.910261] ? __pfx_lock_acquire+0x10/0x10 [ 28.910577] ? __pfx_mmap_region+0x10/0x10 [ 28.910887] ? security_mmap_addr+0x7d/0xa0 [ 28.911199] ? get_unmapped_area+0x1f5/0x3f0 [ 28.911521] do_mmap+0x854/0xf00 [ 28.911779] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.912070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.912400] ksys_mmap_pgoff+0x3af/0x500 [ 28.912709] do_syscall_64+0x3f/0x90 [ 28.912984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913373] RIP: 0033:0x7ff98b0abd82 [ 28.913643] 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 [ 28.914898] RSP: 002b:00007ffdc5d30e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.915415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff98b0abd82 [ 28.915908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff98a4e5000 [ 28.916415] RBP: 00007ff98a4e5000 R08: 0000000000000009 R09: 0000000000001000 [ 28.916915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e68a510f70 [ 28.917401] R13: 00007ffdc5d30eb0 R14: 00007ffdc5d30ee0 R15: 00007ffdc5d31240 [ 28.917909] [ 28.918080] [ 28.918202] Allocated by task 212: [ 28.918451] kasan_save_stack+0x22/0x50 [ 28.918753] kasan_set_track+0x25/0x30 [ 28.919061] __kasan_slab_alloc+0x59/0x70 [ 28.919360] kmem_cache_alloc+0x16b/0x370 [ 28.919669] vm_area_dup+0x20/0x160 [ 28.919939] __split_vma+0x170/0x950 [ 28.920212] split_vma+0xc6/0x110 [ 28.920463] mprotect_fixup+0x8d2/0xb30 [ 28.920760] do_mprotect_pkey+0x87e/0xd40 [ 28.921066] __x64_sys_mprotect+0x78/0xc0 [ 28.921372] do_syscall_64+0x3f/0x90 [ 28.921646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922015] [ 28.922138] Freed by task 212: [ 28.922376] kasan_save_stack+0x22/0x50 [ 28.922668] kasan_set_track+0x25/0x30 [ 28.922963] kasan_save_free_info+0x2b/0x50 [ 28.923275] __kasan_slab_free+0x10a/0x190 [ 28.923583] kmem_cache_free+0x10d/0x4d0 [ 28.923885] rcu_core+0x8c8/0x2860 [ 28.924145] __do_softirq+0x1b7/0x7d4 [ 28.924416] [ 28.924534] Last potentially related work creation: [ 28.924884] kasan_save_stack+0x22/0x50 [ 28.925174] __kasan_record_aux_stack+0x8e/0xa0 [ 28.925509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.925884] remove_vma+0x139/0x170 [ 28.926149] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.926474] do_vmi_munmap+0x1f1/0x2b0 [ 28.926752] __vm_munmap+0x138/0x3a0 [ 28.927035] __x64_sys_munmap+0x59/0x80 [ 28.927335] do_syscall_64+0x3f/0x90 [ 28.927620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927993] [ 28.928123] The buggy address belongs to the object at ffff88800dfeccb0 [ 28.928123] which belongs to the cache vm_area_struct of size 168 [ 28.928986] The buggy address is located 88 bytes inside of [ 28.928986] freed 168-byte region [ffff88800dfeccb0, ffff88800dfecd58) [ 28.929821] [ 28.929950] The buggy address belongs to the physical page: [ 28.930343] page:00000000868428ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfec [ 28.930984] memcg:ffff88800caea101 [ 28.931239] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.931619] page_type: 0xffffffff() [ 28.931882] raw: 0100000000000200 ffff88800879fc80 ffffea00003864c0 dead000000000004 [ 28.932414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caea101 [ 28.932954] page dumped because: kasan: bad access detected [ 28.933343] [ 28.933470] Memory state around the buggy address: [ 28.933812] ffff88800dfecc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.934317] ffff88800dfecc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.934821] >ffff88800dfecd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.935319] ^ [ 28.935581] ffff88800dfecd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.936091] ffff88800dfece00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.936604] ================================================================== [ 28.937179] Disabling lock debugging due to kernel taint [ 30.474444] BUG: Bad rss-counter state mm:0000000057c12fa5 type:MM_FILEPAGES val:33 [ 30.475653] BUG: Bad rss-counter state mm:0000000057c12fa5 type:MM_ANONPAGES val:22 [ 30.936115] BUG: Bad rss-counter state mm:000000006b6d5bcd type:MM_FILEPAGES val:33 [ 30.937107] BUG: Bad rss-counter state mm:000000006b6d5bcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42493' (ECDSA) to the list of known hosts. 2023/06/19 20:55:26 fuzzer started 2023/06/19 20:55:26 dialing manager at localhost:44161 2023/06/19 20:55:26 checking machine... 2023/06/19 20:55:26 checking revisions... [ 31.646981] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:55:26 testing simple program... [ 31.696502] cgroup: Unknown subsys name 'net' [ 31.751041] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:55:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000041 RCX=0000000000000000 RDX=ffff888016360000 RSI=ffffffff818a84ba RDI=0000000000000005 RBP=ffff8880158cd520 RSP=ffff888019fd7b10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888019fd7c48 R13=dffffc0000000000 R14=0000000000000001 R15=ffff888019fd7df0 RIP=ffffffff818a84ba RFL=00000293 [--S-A-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 00007f57bacfe900 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=00007fff11c98000 CR3=000000001019c000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc58fef2040 CR3=000000000d926000 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=667b23e248d35d895f466f3bc56ccaf3 XMM02=000000000011f8c8ec2efd57dc4c00df XMM03=00000000001238086e94be126f3e43a8 XMM04=db291068d217d55e00000000000ae988 XMM05=c087d82cbcc87d3500000000001348e0 XMM06=4fda316b135da52b0000000000133980 XMM07=e042d86d42eb936e0000000000123a88 XMM08=6e94be126f3e43a8000000000011f928 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000