syzkaller login: [ 30.417334] BUG: Bad rss-counter state mm:000000004d8fb47f type:MM_FILEPAGES val:33 [ 30.418826] BUG: Bad rss-counter state mm:000000004d8fb47f type:MM_ANONPAGES val:22 [ 30.568582] ================================================================== [ 30.569422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.570297] Read of size 8 at addr ffff88800e76c880 by task sshd/222 [ 30.571019] [ 30.571305] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.572219] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.573132] Call Trace: [ 30.573433] [ 30.573700] dump_stack_lvl+0x91/0xf0 [ 30.574164] print_report+0xcc/0x620 [ 30.574623] ? __virt_addr_valid+0x102/0x340 [ 30.575145] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.575725] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.576332] kasan_report+0xbe/0xf0 [ 30.576785] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.577371] vma_interval_tree_remove+0xc75/0xec0 [ 30.577942] vma_prepare+0xc54/0x11a0 [ 30.578399] __split_vma+0x5af/0x950 [ 30.578866] ? __pfx___split_vma+0x10/0x10 [ 30.579398] ? find_held_lock+0x2c/0x110 [ 30.579929] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.580491] ? lock_is_held_type+0x9f/0x120 [ 30.581024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.581636] ? mtree_range_walk+0x632/0x900 [ 30.582180] ? mas_walk+0x5c7/0x7c0 [ 30.582652] do_vmi_munmap+0x1f1/0x2b0 [ 30.583144] mmap_region+0x1f9/0x2660 [ 30.583635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.584156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.584875] ? __pfx_lock_acquire+0x10/0x10 [ 30.585407] ? __pfx_mmap_region+0x10/0x10 [ 30.585936] ? security_mmap_addr+0x7d/0xa0 [ 30.586466] ? get_unmapped_area+0x1f5/0x3f0 [ 30.587016] do_mmap+0x854/0xf00 [ 30.587455] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.587971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.588532] ksys_mmap_pgoff+0x3af/0x500 [ 30.589036] do_syscall_64+0x3f/0x90 [ 30.589512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.590152] RIP: 0033:0x7f887ae54d82 [ 30.590600] 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 [ 30.592734] RSP: 002b:00007ffdf8a23d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.593632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f887ae54d82 [ 30.594489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f887a28e000 [ 30.595340] RBP: 00007f887a28e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.596204] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1902b0f70 [ 30.597048] R13: 00007ffdf8a23d30 R14: 00007ffdf8a23d60 R15: 00007ffdf8a240c0 [ 30.597917] [ 30.598212] [ 30.598429] Allocated by task 215: [ 30.598859] kasan_save_stack+0x22/0x50 [ 30.599363] kasan_set_track+0x25/0x30 [ 30.599850] __kasan_slab_alloc+0x59/0x70 [ 30.600362] kmem_cache_alloc+0x16b/0x370 [ 30.600877] vm_area_dup+0x20/0x160 [ 30.601326] __split_vma+0x170/0x950 [ 30.601794] split_vma+0xc6/0x110 [ 30.602233] mprotect_fixup+0x8d2/0xb30 [ 30.602734] do_mprotect_pkey+0x87e/0xd40 [ 30.603245] __x64_sys_mprotect+0x78/0xc0 [ 30.603762] do_syscall_64+0x3f/0x90 [ 30.604256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.604901] [ 30.605118] Freed by task 215: [ 30.605511] kasan_save_stack+0x22/0x50 [ 30.606020] kasan_set_track+0x25/0x30 [ 30.606514] kasan_save_free_info+0x2b/0x50 [ 30.607039] __kasan_slab_free+0x10a/0x190 [ 30.607563] kmem_cache_free+0x10d/0x4d0 [ 30.608087] rcu_core+0x8c8/0x2860 [ 30.608535] __do_softirq+0x1b7/0x7d4 [ 30.609003] [ 30.609213] Last potentially related work creation: [ 30.609799] kasan_save_stack+0x22/0x50 [ 30.610305] __kasan_record_aux_stack+0x8e/0xa0 [ 30.610872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.611514] remove_vma+0x139/0x170 [ 30.611963] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.612518] do_vmi_munmap+0x1f1/0x2b0 [ 30.613000] __vm_munmap+0x138/0x3a0 [ 30.613476] __x64_sys_munmap+0x59/0x80 [ 30.613968] do_syscall_64+0x3f/0x90 [ 30.614440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615076] [ 30.615296] The buggy address belongs to the object at ffff88800e76c828 [ 30.615296] which belongs to the cache vm_area_struct of size 168 [ 30.616783] The buggy address is located 88 bytes inside of [ 30.616783] freed 168-byte region [ffff88800e76c828, ffff88800e76c8d0) [ 30.618205] [ 30.618420] The buggy address belongs to the physical page: [ 30.619086] page:00000000d9e13343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe76c [ 30.620154] memcg:ffff888015c4c201 [ 30.620586] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.621229] page_type: 0xffffffff() [ 30.621678] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.622595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c4c201 [ 30.623505] page dumped because: kasan: bad access detected [ 30.624180] [ 30.624398] Memory state around the buggy address: [ 30.624972] ffff88800e76c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.625810] ffff88800e76c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.626665] >ffff88800e76c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.627512] ^ [ 30.627936] ffff88800e76c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.628793] ffff88800e76c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.629641] ================================================================== [ 30.630621] Disabling lock debugging due to kernel taint [ 32.485118] BUG: Bad rss-counter state mm:000000000b6aaa23 type:MM_FILEPAGES val:33 [ 32.486665] BUG: Bad rss-counter state mm:000000000b6aaa23 type:MM_ANONPAGES val:22 [ 32.958902] BUG: Bad rss-counter state mm:00000000e26ac3ca type:MM_FILEPAGES val:33 [ 32.960253] BUG: Bad rss-counter state mm:00000000e26ac3ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40838' (ECDSA) to the list of known hosts. 2023/06/20 17:05:12 fuzzer started 2023/06/20 17:05:13 dialing manager at localhost:36067 2023/06/20 17:05:13 checking machine... 2023/06/20 17:05:13 checking revisions... [ 33.700643] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:05:13 testing simple program... [ 33.757229] cgroup: Unknown subsys name 'net' [ 33.799989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:12 Registers: info registers vcpu 0 RAX=1ffff1100313c934 RBX=1ffff11002ee1f3c RCX=0000000000000000 RDX=ffff888016b051c0 RSI=ffffffff81c6372f RDI=ffff8880189e49a0 RBP=ffff8880189e49a0 RSP=ffff88801770f998 R8 =0000000000000007 R9 =0000000000000fff R10=ffff8880189e49a0 R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff8493bca0 R14=0000000000001723 R15=ffff888010056000 RIP=ffffffff81c6373b 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 00007f7a11b49700 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=00007fd508596650 CR3=00000000177d8000 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=2032313a35303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35303a3731203032 XMM08=69767265733d7373616c63742030733a 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=00007f52dcdea160 CR3=000000000d5e2000 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=f442f9444224ad9a404aa2e81469b988 XMM02=2c67c8bc2e329bc3000000000011bc28 XMM03=fb795ef6d65770560000000000122890 XMM04=39db41ad920bfc6700000000000ae988 XMM05=59d5b690e0af863b0000000000132708 XMM06=f59282422292320c0000000000131570 XMM07=e042d86d42eb936e0000000000122b10 XMM08=94468a3aa290be84000000000011bc88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000