[ 24.334385] BUG: Bad rss-counter state mm:00000000b86e7654 type:MM_FILEPAGES val:33 [ 24.335829] BUG: Bad rss-counter state mm:00000000b86e7654 type:MM_ANONPAGES val:22 [ 24.484846] ================================================================== [ 24.485917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.487035] Read of size 8 at addr ffff88801b9d75c8 by task sshd/219 [ 24.488064] [ 24.488333] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.489370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.490424] Call Trace: [ 24.490724] [ 24.490991] dump_stack_lvl+0x91/0xf0 [ 24.491454] print_report+0xcc/0x620 [ 24.491910] ? __virt_addr_valid+0x102/0x340 [ 24.492437] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.493026] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.493611] kasan_report+0xbe/0xf0 [ 24.494074] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.494690] vma_interval_tree_remove+0xc75/0xec0 [ 24.495287] vma_prepare+0xc54/0x11a0 [ 24.495764] __split_vma+0x5af/0x950 [ 24.496240] ? __pfx___split_vma+0x10/0x10 [ 24.496774] ? find_held_lock+0x2c/0x110 [ 24.497296] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.497868] ? lock_is_held_type+0x9f/0x120 [ 24.498404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.499017] ? mtree_range_walk+0x632/0x900 [ 24.499571] ? mas_walk+0x5c7/0x7c0 [ 24.500044] do_vmi_munmap+0x1f1/0x2b0 [ 24.500552] mmap_region+0x1f9/0x2660 [ 24.501028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.501534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.502245] ? __pfx_lock_acquire+0x10/0x10 [ 24.502778] ? __pfx_mmap_region+0x10/0x10 [ 24.503312] ? security_mmap_addr+0x7d/0xa0 [ 24.503842] ? get_unmapped_area+0x1f5/0x3f0 [ 24.504399] do_mmap+0x854/0xf00 [ 24.504832] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.505327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.505883] ksys_mmap_pgoff+0x3af/0x500 [ 24.506392] do_syscall_64+0x3f/0x90 [ 24.506875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.507516] RIP: 0033:0x7f6cc09a4d82 [ 24.507968] 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 [ 24.510087] RSP: 002b:00007ffc3d900878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.510980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cc09a4d82 [ 24.511836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cbfdde000 [ 24.512677] RBP: 00007f6cbfdde000 R08: 0000000000000009 R09: 0000000000001000 [ 24.513512] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562da4b51f70 [ 24.514358] R13: 00007ffc3d900890 R14: 00007ffc3d9008c0 R15: 00007ffc3d900c20 [ 24.515200] [ 24.515483] [ 24.515694] Allocated by task 211: [ 24.516116] kasan_save_stack+0x22/0x50 [ 24.516629] kasan_set_track+0x25/0x30 [ 24.517116] __kasan_slab_alloc+0x59/0x70 [ 24.517633] kmem_cache_alloc+0x16b/0x370 [ 24.518148] vm_area_dup+0x20/0x160 [ 24.518603] __split_vma+0x170/0x950 [ 24.519060] split_vma+0xc6/0x110 [ 24.519476] mprotect_fixup+0x8d2/0xb30 [ 24.519952] do_mprotect_pkey+0x87e/0xd40 [ 24.520449] __x64_sys_mprotect+0x78/0xc0 [ 24.520940] do_syscall_64+0x3f/0x90 [ 24.521398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.522008] [ 24.522213] Freed by task 211: [ 24.522584] kasan_save_stack+0x22/0x50 [ 24.523062] kasan_set_track+0x25/0x30 [ 24.523527] kasan_save_free_info+0x2b/0x50 [ 24.524027] __kasan_slab_free+0x10a/0x190 [ 24.524540] kmem_cache_free+0x10d/0x4d0 [ 24.525021] rcu_core+0x8c8/0x2860 [ 24.525443] __do_softirq+0x1b7/0x7d4 [ 24.525900] [ 24.526104] Last potentially related work creation: [ 24.526647] kasan_save_stack+0x22/0x50 [ 24.527127] __kasan_record_aux_stack+0x8e/0xa0 [ 24.527670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.528305] remove_vma+0x139/0x170 [ 24.528753] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.529378] do_vmi_munmap+0x1f1/0x2b0 [ 24.529859] __vm_munmap+0x138/0x3a0 [ 24.530326] __x64_sys_munmap+0x59/0x80 [ 24.530824] do_syscall_64+0x3f/0x90 [ 24.531306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.531933] [ 24.532147] The buggy address belongs to the object at ffff88801b9d7570 [ 24.532147] which belongs to the cache vm_area_struct of size 168 [ 24.533629] The buggy address is located 88 bytes inside of [ 24.533629] freed 168-byte region [ffff88801b9d7570, ffff88801b9d7618) [ 24.535045] [ 24.535255] The buggy address belongs to the physical page: [ 24.535917] page:00000000d9b29331 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b9d7 [ 24.537022] memcg:ffff88801b96db01 [ 24.537439] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.538081] page_type: 0xffffffff() [ 24.538528] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.539458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b96db01 [ 24.540389] page dumped because: kasan: bad access detected [ 24.541053] [ 24.541265] Memory state around the buggy address: [ 24.541859] ffff88801b9d7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.542711] ffff88801b9d7500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.543564] >ffff88801b9d7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.544422] ^ [ 24.545085] ffff88801b9d7600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.545940] ffff88801b9d7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.546792] ================================================================== [ 24.547727] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.449855] BUG: Bad rss-counter state mm:0000000028d93109 type:MM_FILEPAGES val:33 [ 26.450887] BUG: Bad rss-counter state mm:0000000028d93109 type:MM_ANONPAGES val:22 [ 26.931876] BUG: Bad rss-counter state mm:000000001c0991ed type:MM_FILEPAGES val:33 [ 26.933681] BUG: Bad rss-counter state mm:000000001c0991ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35273' (ECDSA) to the list of known hosts. 2023/06/20 14:22:41 fuzzer started 2023/06/20 14:22:41 dialing manager at localhost:36067 2023/06/20 14:22:41 checking machine... 2023/06/20 14:22:41 checking revisions... [ 27.675646] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:22:41 testing simple program... [ 27.729386] cgroup: Unknown subsys name 'net' [ 27.771219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:41 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801c6a7f01 RSI=ffff88801c6a7f50 RDI=ffff88801c6a7f50 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff864b2030 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801c6a7f58 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f390a032900 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=00007f390a5ea0b0 CR3=000000000c682000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800de6e0e8 RCX=0000000000000000 RDX=ffff88800fd0d1c0 RSI=ffffffff81979b9c RDI=ffff88800de6e0e8 RBP=ffff8880147f7d90 RSP=ffff8880147f7a90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffffed1002c5d05b R13=ffffffff81b28f30 R14=ffff88800ffb0000 R15=ffff8880147f7d90 RIP=ffffffff814c0880 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff1ff947900 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=00007ff1fedaba30 CR3=000000000c964000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3e68e6014e5d4cd500000000000ae988 XMM05=c420d524c944d2200000000000131d98 XMM06=dfcdbad4f1609c3700000000001308c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000