syzkaller login: [ 38.702590] BUG: Bad rss-counter state mm:000000006d6e3eb5 type:MM_FILEPAGES val:33 [ 38.703229] BUG: Bad rss-counter state mm:000000006d6e3eb5 type:MM_ANONPAGES val:22 [ 38.867398] ================================================================== [ 38.868363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.869354] Read of size 8 at addr ffff8880168f7b38 by task sshd/226 [ 38.870312] [ 38.870568] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.871610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.872723] Call Trace: [ 38.873047] [ 38.873332] dump_stack_lvl+0x91/0xf0 [ 38.873820] print_report+0xcc/0x620 [ 38.874302] ? __virt_addr_valid+0x102/0x340 [ 38.874851] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875457] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876078] kasan_report+0xbe/0xf0 [ 38.876553] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877170] vma_interval_tree_remove+0xc75/0xec0 [ 38.877773] vma_prepare+0xc54/0x11a0 [ 38.878249] __split_vma+0x5af/0x950 [ 38.878717] ? __pfx___split_vma+0x10/0x10 [ 38.879238] ? find_held_lock+0x2c/0x110 [ 38.879764] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.880331] ? lock_is_held_type+0x9f/0x120 [ 38.880875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.881558] ? mtree_range_walk+0x632/0x900 [ 38.882239] ? mas_walk+0x5c7/0x7c0 [ 38.882823] do_vmi_munmap+0x1f1/0x2b0 [ 38.883436] mmap_region+0x1f9/0x2660 [ 38.884066] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.884701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.885585] ? __pfx_lock_acquire+0x10/0x10 [ 38.886247] ? __pfx_mmap_region+0x10/0x10 [ 38.886905] ? security_mmap_addr+0x7d/0xa0 [ 38.887559] ? get_unmapped_area+0x1f5/0x3f0 [ 38.888253] do_mmap+0x854/0xf00 [ 38.888800] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.889411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.890112] ksys_mmap_pgoff+0x3af/0x500 [ 38.890745] do_syscall_64+0x3f/0x90 [ 38.891335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892145] RIP: 0033:0x7f2e799d7d82 [ 38.892719] 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 [ 38.895334] RSP: 002b:00007ffddf60f148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.896481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e799d7d82 [ 38.897544] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e78e11000 [ 38.898595] RBP: 00007f2e78e11000 R08: 0000000000000009 R09: 0000000000001000 [ 38.899636] R10: 0000000000000812 R11: 0000000000000206 R12: 000055741b830f70 [ 38.900700] R13: 00007ffddf60f160 R14: 00007ffddf60f190 R15: 00007ffddf60f4f0 [ 38.901752] [ 38.902112] [ 38.902377] Allocated by task 219: [ 38.902915] kasan_save_stack+0x22/0x50 [ 38.903540] kasan_set_track+0x25/0x30 [ 38.904205] __kasan_slab_alloc+0x59/0x70 [ 38.904858] kmem_cache_alloc+0x16b/0x370 [ 38.905495] vm_area_dup+0x20/0x160 [ 38.906059] __split_vma+0x170/0x950 [ 38.906639] split_vma+0xc6/0x110 [ 38.907184] mprotect_fixup+0x8d2/0xb30 [ 38.907839] do_mprotect_pkey+0x87e/0xd40 [ 38.908487] __x64_sys_mprotect+0x78/0xc0 [ 38.909127] do_syscall_64+0x3f/0x90 [ 38.909708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910506] [ 38.910772] Freed by task 219: [ 38.911264] kasan_save_stack+0x22/0x50 [ 38.911899] kasan_set_track+0x25/0x30 [ 38.912506] kasan_save_free_info+0x2b/0x50 [ 38.913166] __kasan_slab_free+0x10a/0x190 [ 38.913818] kmem_cache_free+0x10d/0x4d0 [ 38.914444] rcu_core+0x8c8/0x2860 [ 38.914993] __do_softirq+0x1b7/0x7d4 [ 38.915589] [ 38.915863] Last potentially related work creation: [ 38.916595] kasan_save_stack+0x22/0x50 [ 38.917219] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918713] remove_vma+0x139/0x170 [ 38.919277] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919968] do_vmi_munmap+0x1f1/0x2b0 [ 38.920554] __vm_munmap+0x138/0x3a0 [ 38.921114] __x64_sys_munmap+0x59/0x80 [ 38.921701] do_syscall_64+0x3f/0x90 [ 38.922252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923007] [ 38.923261] The buggy address belongs to the object at ffff8880168f7ae0 [ 38.923261] which belongs to the cache vm_area_struct of size 168 [ 38.924981] The buggy address is located 88 bytes inside of [ 38.924981] freed 168-byte region [ffff8880168f7ae0, ffff8880168f7b88) [ 38.926617] [ 38.926869] The buggy address belongs to the physical page: [ 38.927648] page:000000004db8c461 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168f7 [ 38.928961] memcg:ffff888016b1a801 [ 38.929456] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.930207] page_type: 0xffffffff() [ 38.930741] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.931828] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b1a801 [ 38.932896] page dumped because: kasan: bad access detected [ 38.933668] [ 38.933926] Memory state around the buggy address: [ 38.934605] ffff8880168f7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.935616] ffff8880168f7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.936666] >ffff8880168f7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.937675] ^ [ 38.938393] ffff8880168f7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.939397] ffff8880168f7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.940431] ================================================================== [ 38.941857] Disabling lock debugging due to kernel taint [ 41.245638] BUG: Bad rss-counter state mm:00000000a8286041 type:MM_FILEPAGES val:33 [ 41.246627] BUG: Bad rss-counter state mm:00000000a8286041 type:MM_ANONPAGES val:22 [ 41.746461] BUG: Bad rss-counter state mm:0000000009722c07 type:MM_FILEPAGES val:33 [ 41.747634] BUG: Bad rss-counter state mm:0000000009722c07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36120' (ECDSA) to the list of known hosts. 2023/06/20 14:38:14 fuzzer started 2023/06/20 14:38:14 dialing manager at localhost:36067 2023/06/20 14:38:14 checking machine... 2023/06/20 14:38:14 checking revisions... [ 42.433792] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:38:14 testing simple program... [ 42.484790] cgroup: Unknown subsys name 'net' [ 42.534598] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:38:14 Registers: info registers vcpu 0 RAX=ffff888016b3ff58 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002d67f2e RSI=ffffffff846000aa RDI=ffff888016b3f928 RBP=ffff888016b3f980 RSP=ffff888016b3f8b8 R8 =0000000000000001 R9 =ffff888016b3f968 R10=0000000000038001 R11=00000000000b5080 R12=ffff888016b3f9f0 R13=ffff888016b3f970 R14=ffff88800ff5b680 R15=ffff888016b3f928 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 00007ffa46d94900 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=00007fff674b0000 CR3=000000000f5d0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bce2c RDX=1ffff1100d9e135f RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ada RSP=ffff88806cf09a28 R8 =ffffffff864bce30 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e07dc8 R15=ffff88806cf09a98 RIP=ffffffff81131b74 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 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=00007fe5b23d5000 CR3=0000000013abc000 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=1a6674572bc631a35f4a34fb1764b466 XMM02=2c67c8bc2e329bc3000000000011b180 XMM03=fb795ef6d65770560000000000121b40 XMM04=20dcebd3a1b91b1200000000000ae988 XMM05=081a18b80182ddee0000000000132898 XMM06=13e856d8d71426c800000000001315d8 XMM07=e042d86d42eb936e0000000000121e18 XMM08=2d48564fc1be438f000000000011b1e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000