syzkaller login: [ 30.639096] BUG: Bad rss-counter state mm:0000000090244142 type:MM_FILEPAGES val:33 [ 30.640433] BUG: Bad rss-counter state mm:0000000090244142 type:MM_ANONPAGES val:22 [ 30.671262] ================================================================== [ 30.672054] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.672789] Read of size 8 at addr ffff8880171cd140 by task sshd/221 [ 30.673450] [ 30.673680] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.674346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.675172] Call Trace: [ 30.675494] [ 30.675712] dump_stack_lvl+0x91/0xf0 [ 30.676111] print_report+0xcc/0x620 [ 30.676545] ? __virt_addr_valid+0x102/0x340 [ 30.676962] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677434] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678038] kasan_report+0xbe/0xf0 [ 30.678405] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678882] vma_interval_tree_remove+0xc75/0xec0 [ 30.679339] vma_prepare+0xc54/0x11a0 [ 30.679706] __split_vma+0x5af/0x950 [ 30.680066] ? __pfx___split_vma+0x10/0x10 [ 30.680474] ? find_held_lock+0x2c/0x110 [ 30.680872] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.681299] ? lock_is_held_type+0x9f/0x120 [ 30.681737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.682202] ? mtree_range_walk+0x632/0x900 [ 30.682590] ? mas_walk+0x5c7/0x7c0 [ 30.682918] do_vmi_munmap+0x1f1/0x2b0 [ 30.683254] mmap_region+0x1f9/0x2660 [ 30.683579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.683926] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.684406] ? __pfx_lock_acquire+0x10/0x10 [ 30.684765] ? __pfx_mmap_region+0x10/0x10 [ 30.685133] ? security_mmap_addr+0x7d/0xa0 [ 30.685500] ? get_unmapped_area+0x1f5/0x3f0 [ 30.685874] do_mmap+0x854/0xf00 [ 30.686172] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.686511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.686893] ksys_mmap_pgoff+0x3af/0x500 [ 30.687239] do_syscall_64+0x3f/0x90 [ 30.687568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688010] RIP: 0033:0x7f18bf605d82 [ 30.688318] 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 [ 30.689779] RSP: 002b:00007ffdbb1f5d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.690385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18bf605d82 [ 30.690966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18bea3f000 [ 30.691535] RBP: 00007f18bea3f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.692116] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555df8f41ec0 [ 30.692693] R13: 00007ffdbb1f5d90 R14: 00007ffdbb1f5dc0 R15: 00007ffdbb1f6120 [ 30.693274] [ 30.693485] [ 30.693630] Allocated by task 214: [ 30.693922] kasan_save_stack+0x22/0x50 [ 30.694261] kasan_set_track+0x25/0x30 [ 30.694592] __kasan_slab_alloc+0x59/0x70 [ 30.694946] kmem_cache_alloc+0x16b/0x370 [ 30.695295] vm_area_dup+0x20/0x160 [ 30.695599] __split_vma+0x170/0x950 [ 30.695913] split_vma+0xc6/0x110 [ 30.696207] mprotect_fixup+0x8d2/0xb30 [ 30.696550] do_mprotect_pkey+0x87e/0xd40 [ 30.696901] __x64_sys_mprotect+0x78/0xc0 [ 30.697250] do_syscall_64+0x3f/0x90 [ 30.697577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698008] [ 30.698154] Freed by task 211: [ 30.698423] kasan_save_stack+0x22/0x50 [ 30.698766] kasan_set_track+0x25/0x30 [ 30.699097] kasan_save_free_info+0x2b/0x50 [ 30.699454] __kasan_slab_free+0x10a/0x190 [ 30.699812] kmem_cache_free+0x10d/0x4d0 [ 30.700158] rcu_core+0x8c8/0x2860 [ 30.700462] __do_softirq+0x1b7/0x7d4 [ 30.700789] [ 30.700933] Last potentially related work creation: [ 30.701507] kasan_save_stack+0x22/0x50 [ 30.701847] __kasan_record_aux_stack+0x8e/0xa0 [ 30.702236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.702675] remove_vma+0x139/0x170 [ 30.702980] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.703348] do_vmi_munmap+0x1f1/0x2b0 [ 30.703693] __vm_munmap+0x138/0x3a0 [ 30.704005] __x64_sys_munmap+0x59/0x80 [ 30.704339] do_syscall_64+0x3f/0x90 [ 30.704657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.705088] [ 30.705230] The buggy address belongs to the object at ffff8880171cd0e8 [ 30.705230] which belongs to the cache vm_area_struct of size 168 [ 30.706228] The buggy address is located 88 bytes inside of [ 30.706228] freed 168-byte region [ffff8880171cd0e8, ffff8880171cd190) [ 30.707170] [ 30.707316] The buggy address belongs to the physical page: [ 30.707762] page:0000000091cb2076 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171cd [ 30.708501] memcg:ffff88800c850501 [ 30.708786] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.709220] page_type: 0xffffffff() [ 30.709528] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.710145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c850501 [ 30.710760] page dumped because: kasan: bad access detected [ 30.711207] [ 30.711351] Memory state around the buggy address: [ 30.711738] ffff8880171cd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.712316] ffff8880171cd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.712901] >ffff8880171cd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.713495] ^ [ 30.713929] ffff8880171cd180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.714502] ffff8880171cd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.715070] ================================================================== [ 30.715695] Disabling lock debugging due to kernel taint [ 32.891864] BUG: Bad rss-counter state mm:00000000d5766fbc type:MM_FILEPAGES val:33 [ 32.893128] BUG: Bad rss-counter state mm:00000000d5766fbc type:MM_ANONPAGES val:22 [ 33.344040] BUG: Bad rss-counter state mm:00000000a7840789 type:MM_FILEPAGES val:33 [ 33.345271] BUG: Bad rss-counter state mm:00000000a7840789 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20069' (ECDSA) to the list of known hosts. 2023/06/21 02:29:58 fuzzer started 2023/06/21 02:29:59 dialing manager at localhost:36067 2023/06/21 02:29:59 checking machine... 2023/06/21 02:29:59 checking revisions... [ 34.045081] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:29:59 testing simple program... [ 34.106773] cgroup: Unknown subsys name 'net' [ 34.155440] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:58 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000008632d369 RCX=ffff88806c569b48 RDX=0000000000000012 RSI=0000000000000003 RDI=00000000525648d4 RBP=ffff88800e4539c0 RSP=ffff88800c97f648 R8 =000000004341072d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092c40 R14=ffff88800c97f6b0 R15=0000000000000012 RIP=ffffffff822704ed 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 00007f53d1069700 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=00007ff03aa65618 CR3=000000000dd9c000 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=2038353a39323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a39323a3230203132 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=00007f7ce2e00570 CR3=000000000c68e000 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=2622c300e9e6e483df4b6e5b5d4b16eb XMM02=ec2efd57dc4c00df000000000011d368 XMM03=e36babce5ed9441a000000000011d438 XMM04=11d0766103e36d9600000000000ae988 XMM05=e4cb8bb95a7664b60000000000131940 XMM06=c291bd5c70af25b900000000001317c8 XMM07=e042d86d42eb936e0000000000121d20 XMM08=e36babce5ed9441a000000000011d438 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000