syzkaller login: [ 30.592895] sshd (212) used greatest stack depth: 24128 bytes left [ 30.594499] BUG: Bad rss-counter state mm:0000000099c6e85a type:MM_FILEPAGES val:33 [ 30.595648] BUG: Bad rss-counter state mm:0000000099c6e85a type:MM_ANONPAGES val:22 [ 30.777225] ================================================================== [ 30.778409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.779762] Read of size 8 at addr ffff88801935d968 by task sshd/219 [ 30.780756] [ 30.781038] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.782159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.783449] Call Trace: [ 30.783860] [ 30.784169] dump_stack_lvl+0x91/0xf0 [ 30.784702] print_report+0xcc/0x620 [ 30.785228] ? __virt_addr_valid+0x102/0x340 [ 30.785834] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786513] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787179] kasan_report+0xbe/0xf0 [ 30.787708] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788382] vma_interval_tree_remove+0xc75/0xec0 [ 30.789039] vma_prepare+0xc54/0x11a0 [ 30.789572] __split_vma+0x5af/0x950 [ 30.790098] ? __pfx___split_vma+0x10/0x10 [ 30.790689] ? find_held_lock+0x2c/0x110 [ 30.791268] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.791918] ? lock_is_held_type+0x9f/0x120 [ 30.792524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.793204] ? mtree_range_walk+0x632/0x900 [ 30.793820] ? mas_walk+0x5c7/0x7c0 [ 30.794347] do_vmi_munmap+0x1f1/0x2b0 [ 30.794897] mmap_region+0x1f9/0x2660 [ 30.795438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.796006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.796813] ? __pfx_lock_acquire+0x10/0x10 [ 30.797411] ? __pfx_mmap_region+0x10/0x10 [ 30.798002] ? security_mmap_addr+0x7d/0xa0 [ 30.798591] ? get_unmapped_area+0x1f5/0x3f0 [ 30.799196] do_mmap+0x854/0xf00 [ 30.799697] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.800236] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.800861] ksys_mmap_pgoff+0x3af/0x500 [ 30.801425] do_syscall_64+0x3f/0x90 [ 30.801957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802676] RIP: 0033:0x7fe9f3f6ed82 [ 30.803182] 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 [ 30.805552] RSP: 002b:00007fff54c90ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.806550] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9f3f6ed82 [ 30.807509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9f33a8000 [ 30.808432] RBP: 00007fe9f33a8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.809360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560bd9d50ec0 [ 30.810277] R13: 00007fff54c90ad0 R14: 00007fff54c90b00 R15: 00007fff54c90e60 [ 30.811207] [ 30.811540] [ 30.811774] Allocated by task 212: [ 30.812241] kasan_save_stack+0x22/0x50 [ 30.812790] kasan_set_track+0x25/0x30 [ 30.813336] __kasan_slab_alloc+0x59/0x70 [ 30.813902] kmem_cache_alloc+0x16b/0x370 [ 30.814459] vm_area_dup+0x20/0x160 [ 30.814946] __split_vma+0x170/0x950 [ 30.815472] split_vma+0xc6/0x110 [ 30.815948] mprotect_fixup+0x8d2/0xb30 [ 30.816500] do_mprotect_pkey+0x87e/0xd40 [ 30.817077] __x64_sys_mprotect+0x78/0xc0 [ 30.817664] do_syscall_64+0x3f/0x90 [ 30.818214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818948] [ 30.819191] Freed by task 212: [ 30.819642] kasan_save_stack+0x22/0x50 [ 30.820218] kasan_set_track+0x25/0x30 [ 30.820841] kasan_save_free_info+0x2b/0x50 [ 30.821448] __kasan_slab_free+0x10a/0x190 [ 30.822055] kmem_cache_free+0x10d/0x4d0 [ 30.822625] rcu_core+0x8c8/0x2860 [ 30.823134] __do_softirq+0x1b7/0x7d4 [ 30.823703] [ 30.823944] Last potentially related work creation: [ 30.824612] kasan_save_stack+0x22/0x50 [ 30.825184] __kasan_record_aux_stack+0x8e/0xa0 [ 30.825833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.826568] remove_vma+0x139/0x170 [ 30.827085] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.827724] do_vmi_munmap+0x1f1/0x2b0 [ 30.828278] __vm_munmap+0x138/0x3a0 [ 30.828804] __x64_sys_munmap+0x59/0x80 [ 30.829363] do_syscall_64+0x3f/0x90 [ 30.829904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830635] [ 30.830878] The buggy address belongs to the object at ffff88801935d910 [ 30.830878] which belongs to the cache vm_area_struct of size 168 [ 30.832560] The buggy address is located 88 bytes inside of [ 30.832560] freed 168-byte region [ffff88801935d910, ffff88801935d9b8) [ 30.834152] [ 30.834401] The buggy address belongs to the physical page: [ 30.835144] page:0000000097e45334 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1935d [ 30.836406] memcg:ffff88801935e001 [ 30.836886] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.837627] page_type: 0xffffffff() [ 30.838149] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.839183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801935e001 [ 30.840210] page dumped because: kasan: bad access detected [ 30.840955] [ 30.841195] Memory state around the buggy address: [ 30.841849] ffff88801935d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.842801] ffff88801935d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.843769] >ffff88801935d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.844727] ^ [ 30.845649] ffff88801935d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.846600] ffff88801935da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.847572] ================================================================== [ 30.848635] Disabling lock debugging due to kernel taint [ 33.213206] BUG: Bad rss-counter state mm:00000000051a3bbc type:MM_FILEPAGES val:33 [ 33.214383] BUG: Bad rss-counter state mm:00000000051a3bbc type:MM_ANONPAGES val:22 [ 33.596605] BUG: Bad rss-counter state mm:0000000033576551 type:MM_FILEPAGES val:33 [ 33.597801] BUG: Bad rss-counter state mm:0000000033576551 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24778' (ECDSA) to the list of known hosts. 2023/06/20 13:07:27 fuzzer started 2023/06/20 13:07:27 dialing manager at localhost:36067 2023/06/20 13:07:27 checking machine... 2023/06/20 13:07:27 checking revisions... [ 34.348098] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:07:27 testing simple program... [ 34.397389] cgroup: Unknown subsys name 'net' [ 34.452822] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:07:27 Registers: info registers vcpu 0 RAX=000000000000004e RBX=0000000000000270 RCX=0000000000000000 RDX=00007fd214000300 RSI=0000000000000270 RDI=00007fd214000020 RBP=0000000000000280 RSP=00007fd2240ee5e0 R8 =0000000000000014 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=00007fd214000020 R13=0000000000000028 R14=00007fd214004a60 R15=00007fd2140002f0 RIP=00007fd22450b5ac RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd2240f2700 00000000 00000000 GS =0000 0000000000000000 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=00007ffea6e88000 CR3=0000000015bc4000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732037323a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383031 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=00007f49763369d0 CR3=000000000da1a000 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=a2ba51c864cb7db51c4a63ad67a768e0 XMM02=000000000011c590eff9b2d0a8fce9cb XMM03=000000000011c6602c67c8bc2e329bc3 XMM04=35fb656423bc18a600000000000ae988 XMM05=de85ae2f28d8802300000000001341b0 XMM06=806171799158d9670000000000133250 XMM07=e042d86d42eb936e00000000001235a8 XMM08=62f951539fb7dad4000000000011c660 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000