syzkaller login: [ 31.151877] BUG: Bad rss-counter state mm:00000000feb36f31 type:MM_FILEPAGES val:33 [ 31.153994] BUG: Bad rss-counter state mm:00000000feb36f31 type:MM_ANONPAGES val:22 [ 31.327511] ================================================================== [ 31.328406] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.329360] Read of size 8 at addr ffff88801a21f310 by task sshd/220 [ 31.330113] [ 31.330331] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.331287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.332242] Call Trace: [ 31.332555] [ 31.332876] dump_stack_lvl+0x91/0xf0 [ 31.333364] print_report+0xcc/0x620 [ 31.333842] ? __virt_addr_valid+0x102/0x340 [ 31.334388] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.334999] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335616] kasan_report+0xbe/0xf0 [ 31.336089] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336727] vma_interval_tree_remove+0xc75/0xec0 [ 31.337324] vma_prepare+0xc54/0x11a0 [ 31.337796] __split_vma+0x5af/0x950 [ 31.338265] ? __pfx___split_vma+0x10/0x10 [ 31.338783] ? find_held_lock+0x2c/0x110 [ 31.339301] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.339865] ? lock_is_held_type+0x9f/0x120 [ 31.340401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.341028] ? mtree_range_walk+0x632/0x900 [ 31.341571] ? mas_walk+0x5c7/0x7c0 [ 31.342038] do_vmi_munmap+0x1f1/0x2b0 [ 31.342525] mmap_region+0x1f9/0x2660 [ 31.342999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.343502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.344204] ? __pfx_lock_acquire+0x10/0x10 [ 31.344739] ? __pfx_mmap_region+0x10/0x10 [ 31.345263] ? security_mmap_addr+0x7d/0xa0 [ 31.345789] ? get_unmapped_area+0x1f5/0x3f0 [ 31.346331] do_mmap+0x854/0xf00 [ 31.346763] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.347251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.347811] ksys_mmap_pgoff+0x3af/0x500 [ 31.348310] do_syscall_64+0x3f/0x90 [ 31.348792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.349433] RIP: 0033:0x7f5068694d82 [ 31.349888] 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 [ 31.351987] RSP: 002b:00007ffc40dfb728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.352899] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5068694d82 [ 31.353734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5067ace000 [ 31.354572] RBP: 00007f5067ace000 R08: 0000000000000009 R09: 0000000000001000 [ 31.355416] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2e18d0f70 [ 31.356261] R13: 00007ffc40dfb740 R14: 00007ffc40dfb770 R15: 00007ffc40dfbad0 [ 31.357120] [ 31.357408] [ 31.357621] Allocated by task 213: [ 31.358040] kasan_save_stack+0x22/0x50 [ 31.358535] kasan_set_track+0x25/0x30 [ 31.359021] __kasan_slab_alloc+0x59/0x70 [ 31.359543] kmem_cache_alloc+0x16b/0x370 [ 31.360049] vm_area_dup+0x20/0x160 [ 31.360497] __split_vma+0x170/0x950 [ 31.360976] split_vma+0xc6/0x110 [ 31.361416] mprotect_fixup+0x8d2/0xb30 [ 31.361917] do_mprotect_pkey+0x87e/0xd40 [ 31.362428] __x64_sys_mprotect+0x78/0xc0 [ 31.362941] do_syscall_64+0x3f/0x90 [ 31.363411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364050] [ 31.364262] Freed by task 213: [ 31.364664] kasan_save_stack+0x22/0x50 [ 31.365170] kasan_set_track+0x25/0x30 [ 31.365656] kasan_save_free_info+0x2b/0x50 [ 31.366183] __kasan_slab_free+0x10a/0x190 [ 31.366708] kmem_cache_free+0x10d/0x4d0 [ 31.367215] rcu_core+0x8c8/0x2860 [ 31.367655] __do_softirq+0x1b7/0x7d4 [ 31.368129] [ 31.368341] Last potentially related work creation: [ 31.368926] kasan_save_stack+0x22/0x50 [ 31.369422] __kasan_record_aux_stack+0x8e/0xa0 [ 31.369991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.370630] remove_vma+0x139/0x170 [ 31.371076] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.371632] do_vmi_munmap+0x1f1/0x2b0 [ 31.372113] __vm_munmap+0x138/0x3a0 [ 31.372572] __x64_sys_munmap+0x59/0x80 [ 31.373078] do_syscall_64+0x3f/0x90 [ 31.373548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374188] [ 31.374405] The buggy address belongs to the object at ffff88801a21f2b8 [ 31.374405] which belongs to the cache vm_area_struct of size 168 [ 31.375859] The buggy address is located 88 bytes inside of [ 31.375859] freed 168-byte region [ffff88801a21f2b8, ffff88801a21f360) [ 31.377252] [ 31.377467] The buggy address belongs to the physical page: [ 31.378124] page:00000000269bd084 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a21f [ 31.379209] memcg:ffff8880094d8a01 [ 31.379631] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.380263] page_type: 0xffffffff() [ 31.380724] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.381634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094d8a01 [ 31.382528] page dumped because: kasan: bad access detected [ 31.383179] [ 31.383391] Memory state around the buggy address: [ 31.383963] ffff88801a21f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.384813] ffff88801a21f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.385663] >ffff88801a21f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.386498] ^ [ 31.386965] ffff88801a21f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.387807] ffff88801a21f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.388658] ================================================================== [ 31.389641] Disabling lock debugging due to kernel taint [ 33.272785] BUG: Bad rss-counter state mm:00000000777e7892 type:MM_FILEPAGES val:33 [ 33.273649] BUG: Bad rss-counter state mm:00000000777e7892 type:MM_ANONPAGES val:22 [ 33.668094] BUG: Bad rss-counter state mm:00000000ca2566a9 type:MM_FILEPAGES val:33 [ 33.669178] BUG: Bad rss-counter state mm:00000000ca2566a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64605' (ECDSA) to the list of known hosts. 2023/06/20 18:19:09 fuzzer started 2023/06/20 18:19:09 dialing manager at localhost:36067 2023/06/20 18:19:09 checking machine... 2023/06/20 18:19:09 checking revisions... [ 34.341196] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:19:09 testing simple program... [ 34.393513] cgroup: Unknown subsys name 'net' [ 34.456767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:09 Registers: info registers vcpu 0 RAX=ffffffff86621198 RBX=ffffffff813ad470 RCX=ffffffff812d86ea RDX=1ffff1100d9c135e RSI=ffffffff86621198 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e51d540 RIP=ffffffff813ad474 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 0000000000000000 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=00007ffdfb585268 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f198c01c5100000559a0bbca790 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 info registers vcpu 1 RAX=0000000000022404 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801435f7c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff8880164aa1e8 R15=0000000000000000 RIP=ffffffff8135b973 RFL=00000046 [---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 00007fd04d0e2900 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=00007fb46a665650 CR3=000000000c55c000 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=30d468a9ce30c2b1e143f69ab79c2913 XMM02=000000000011afb0eff9b2d0a8fce9cb XMM03=000000000011b0802c67c8bc2e329bc3 XMM04=8845d0031fd1eb1900000000000ae988 XMM05=21cf71277ea66a820000000000132cc0 XMM06=4fda316b135da52b0000000000131ab0 XMM07=fb795ef6d65770560000000000121e00 XMM08=2c67c8bc2e329bc3000000000011b020 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000