syzkaller login: [ 58.768715] BUG: Bad rss-counter state mm:00000000dc042f40 type:MM_FILEPAGES val:33 [ 58.770058] BUG: Bad rss-counter state mm:00000000dc042f40 type:MM_ANONPAGES val:22 [ 58.951582] ================================================================== [ 58.952256] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.952947] Read of size 8 at addr ffff88800fb8e140 by task sshd/223 [ 58.953526] [ 58.953686] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 58.954319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.955037] Call Trace: [ 58.955271] [ 58.955480] dump_stack_lvl+0x91/0xf0 [ 58.955844] print_report+0xcc/0x620 [ 58.956201] ? __virt_addr_valid+0x102/0x340 [ 58.956606] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.957166] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.957624] kasan_report+0xbe/0xf0 [ 58.957888] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.958229] vma_interval_tree_remove+0xc75/0xec0 [ 58.958557] vma_prepare+0xc54/0x11a0 [ 58.958819] __split_vma+0x5af/0x950 [ 58.959094] ? __pfx___split_vma+0x10/0x10 [ 58.959384] ? find_held_lock+0x2c/0x110 [ 58.959669] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.959977] ? lock_is_held_type+0x9f/0x120 [ 58.960271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.960608] ? mtree_range_walk+0x632/0x900 [ 58.960910] ? mas_walk+0x5c7/0x7c0 [ 58.961170] do_vmi_munmap+0x1f1/0x2b0 [ 58.961447] mmap_region+0x1f9/0x2660 [ 58.961714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.962006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.962412] ? __pfx_lock_acquire+0x10/0x10 [ 58.962715] ? __pfx_mmap_region+0x10/0x10 [ 58.963022] ? security_mmap_addr+0x7d/0xa0 [ 58.963318] ? get_unmapped_area+0x1f5/0x3f0 [ 58.963628] do_mmap+0x854/0xf00 [ 58.963874] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.964152] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.964468] ksys_mmap_pgoff+0x3af/0x500 [ 58.964757] do_syscall_64+0x3f/0x90 [ 58.965027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.965401] RIP: 0033:0x7fb72c2f0d82 [ 58.965660] 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 [ 58.966862] RSP: 002b:00007ffedd07f348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.967376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb72c2f0d82 [ 58.967857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb72b72a000 [ 58.968337] RBP: 00007fb72b72a000 R08: 0000000000000009 R09: 0000000000001000 [ 58.968822] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585c084eec0 [ 58.969302] R13: 00007ffedd07f360 R14: 00007ffedd07f390 R15: 00007ffedd07f6f0 [ 58.969808] [ 58.969974] [ 58.970098] Allocated by task 214: [ 58.970341] kasan_save_stack+0x22/0x50 [ 58.970628] kasan_set_track+0x25/0x30 [ 58.970908] __kasan_slab_alloc+0x59/0x70 [ 58.971204] kmem_cache_alloc+0x16b/0x370 [ 58.971498] vm_area_dup+0x20/0x160 [ 58.971757] __split_vma+0x170/0x950 [ 58.972019] split_vma+0xc6/0x110 [ 58.972265] mprotect_fixup+0x8d2/0xb30 [ 58.972551] do_mprotect_pkey+0x87e/0xd40 [ 58.972847] __x64_sys_mprotect+0x78/0xc0 [ 58.973141] do_syscall_64+0x3f/0x90 [ 58.973417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.973788] [ 58.973907] Freed by task 19: [ 58.974124] kasan_save_stack+0x22/0x50 [ 58.974411] kasan_set_track+0x25/0x30 [ 58.974689] kasan_save_free_info+0x2b/0x50 [ 58.974990] __kasan_slab_free+0x10a/0x190 [ 58.975293] kmem_cache_free+0x10d/0x4d0 [ 58.975579] rcu_core+0x8c8/0x2860 [ 58.975833] __do_softirq+0x1b7/0x7d4 [ 58.976105] [ 58.976228] Last potentially related work creation: [ 58.976561] kasan_save_stack+0x22/0x50 [ 58.976845] __kasan_record_aux_stack+0x8e/0xa0 [ 58.977170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.977538] remove_vma+0x139/0x170 [ 58.977796] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.978108] do_vmi_munmap+0x1f1/0x2b0 [ 58.978381] __vm_munmap+0x138/0x3a0 [ 58.978644] __x64_sys_munmap+0x59/0x80 [ 58.978927] do_syscall_64+0x3f/0x90 [ 58.979193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.979558] [ 58.979682] The buggy address belongs to the object at ffff88800fb8e0e8 [ 58.979682] which belongs to the cache vm_area_struct of size 168 [ 58.980516] The buggy address is located 88 bytes inside of [ 58.980516] freed 168-byte region [ffff88800fb8e0e8, ffff88800fb8e190) [ 58.981308] [ 58.981443] The buggy address belongs to the physical page: [ 58.981820] page:0000000035894688 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb8e [ 58.982436] memcg:ffff88800f99b201 [ 58.982682] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 58.983075] page_type: 0xffffffff() [ 58.983330] raw: 0100000000000200 ffff8880087a0c80 ffffea00005affc0 dead000000000005 [ 58.983850] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f99b201 [ 58.984360] page dumped because: kasan: bad access detected [ 58.984736] [ 58.984858] Memory state around the buggy address: [ 58.985189] ffff88800fb8e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.985684] ffff88800fb8e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 58.986156] >ffff88800fb8e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.986625] ^ [ 58.986987] ffff88800fb8e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 58.987471] ffff88800fb8e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 58.987962] ================================================================== [ 58.988488] Disabling lock debugging due to kernel taint [ 61.404205] BUG: Bad rss-counter state mm:000000007449c320 type:MM_FILEPAGES val:33 [ 61.405237] BUG: Bad rss-counter state mm:000000007449c320 type:MM_ANONPAGES val:22 [ 61.876123] BUG: Bad rss-counter state mm:000000005e3c56d9 type:MM_FILEPAGES val:33 [ 61.877181] BUG: Bad rss-counter state mm:000000005e3c56d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17989' (ECDSA) to the list of known hosts. 2023/06/20 21:00:39 fuzzer started 2023/06/20 21:00:40 dialing manager at localhost:36067 2023/06/20 21:00:40 checking machine... 2023/06/20 21:00:40 checking revisions... [ 62.630099] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:00:40 testing simple program... [ 62.680384] cgroup: Unknown subsys name 'net' [ 62.731975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:39 Registers: info registers vcpu 0 RAX=ffffffff86138eb1 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86138eb4 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09dc8 R15=ffff88806ce09a78 RIP=ffffffff81130b99 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 00007f61fea32700 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=00007fd44fcaaed0 CR3=000000000c4fa000 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=2039333a30303a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30303a3132203032 XMM08=3d656e696c646d632022656369767265 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=00007ffdf56ecae8 CR3=0000000005482000 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=00007fdcde1de5100000563ed16b3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000