[ 36.495133] BUG: Bad rss-counter state mm:0000000069ba2446 type:MM_FILEPAGES val:33 [ 36.496666] BUG: Bad rss-counter state mm:0000000069ba2446 type:MM_ANONPAGES val:22 [ 36.649523] ================================================================== [ 36.650465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.651426] Read of size 8 at addr ffff8880173afed8 by task sshd/220 [ 36.652221] [ 36.652572] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.653487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.654496] Call Trace: [ 36.654857] [ 36.655160] dump_stack_lvl+0x91/0xf0 [ 36.655663] print_report+0xcc/0x620 [ 36.656203] ? __virt_addr_valid+0x102/0x340 [ 36.656798] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.657424] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.658082] kasan_report+0xbe/0xf0 [ 36.658560] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.659207] vma_interval_tree_remove+0xc75/0xec0 [ 36.659824] vma_prepare+0xc54/0x11a0 [ 36.660301] __split_vma+0x5af/0x950 [ 36.660814] ? __pfx___split_vma+0x10/0x10 [ 36.661349] ? find_held_lock+0x2c/0x110 [ 36.661893] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.662463] ? lock_is_held_type+0x9f/0x120 [ 36.663030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.663648] ? mtree_range_walk+0x632/0x900 [ 36.664226] ? mas_walk+0x5c7/0x7c0 [ 36.664754] do_vmi_munmap+0x1f1/0x2b0 [ 36.665267] mmap_region+0x1f9/0x2660 [ 36.665772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.666282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.667023] ? __pfx_lock_acquire+0x10/0x10 [ 36.667571] ? __pfx_mmap_region+0x10/0x10 [ 36.668124] ? security_mmap_addr+0x7d/0xa0 [ 36.668673] ? get_unmapped_area+0x1f5/0x3f0 [ 36.669255] do_mmap+0x854/0xf00 [ 36.669710] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.670208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.670791] ksys_mmap_pgoff+0x3af/0x500 [ 36.671305] do_syscall_64+0x3f/0x90 [ 36.671810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.672459] RIP: 0033:0x7f0f609abd82 [ 36.672955] 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 [ 36.675111] RSP: 002b:00007ffd55b70768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.676057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f609abd82 [ 36.676956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f5fde5000 [ 36.677829] RBP: 00007f0f5fde5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.678696] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559187edcf60 [ 36.679570] R13: 00007ffd55b70780 R14: 00007ffd55b707b0 R15: 00007ffd55b70b10 [ 36.680455] [ 36.680778] [ 36.681000] Allocated by task 213: [ 36.681432] kasan_save_stack+0x22/0x50 [ 36.681955] kasan_set_track+0x25/0x30 [ 36.682445] __kasan_slab_alloc+0x59/0x70 [ 36.682986] kmem_cache_alloc+0x16b/0x370 [ 36.683510] vm_area_dup+0x20/0x160 [ 36.683991] __split_vma+0x170/0x950 [ 36.684462] split_vma+0xc6/0x110 [ 36.684925] mprotect_fixup+0x8d2/0xb30 [ 36.685429] do_mprotect_pkey+0x87e/0xd40 [ 36.685968] __x64_sys_mprotect+0x78/0xc0 [ 36.686493] do_syscall_64+0x3f/0x90 [ 36.686986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.687642] [ 36.687884] Freed by task 213: [ 36.688351] kasan_save_stack+0x22/0x50 [ 36.689049] kasan_set_track+0x25/0x30 [ 36.689700] kasan_save_free_info+0x2b/0x50 [ 36.690421] __kasan_slab_free+0x10a/0x190 [ 36.691130] kmem_cache_free+0x10d/0x4d0 [ 36.691684] rcu_core+0x8c8/0x2860 [ 36.692175] __do_softirq+0x1b7/0x7d4 [ 36.692680] [ 36.692921] Last potentially related work creation: [ 36.693511] kasan_save_stack+0x22/0x50 [ 36.694106] __kasan_record_aux_stack+0x8e/0xa0 [ 36.694693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.695352] remove_vma+0x139/0x170 [ 36.695827] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.696397] do_vmi_munmap+0x1f1/0x2b0 [ 36.696929] __vm_munmap+0x138/0x3a0 [ 36.697399] __x64_sys_munmap+0x59/0x80 [ 36.697938] do_syscall_64+0x3f/0x90 [ 36.698429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.699088] [ 36.699307] The buggy address belongs to the object at ffff8880173afe80 [ 36.699307] which belongs to the cache vm_area_struct of size 168 [ 36.700825] The buggy address is located 88 bytes inside of [ 36.700825] freed 168-byte region [ffff8880173afe80, ffff8880173aff28) [ 36.702252] [ 36.702474] The buggy address belongs to the physical page: [ 36.703158] page:000000006b33987a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x173af [ 36.704289] memcg:ffff888015cd3801 [ 36.704761] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.705414] page_type: 0xffffffff() [ 36.705890] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.706833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015cd3801 [ 36.707763] page dumped because: kasan: bad access detected [ 36.708429] [ 36.708665] Memory state around the buggy address: [ 36.709268] ffff8880173afd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.710224] ffff8880173afe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.711168] >ffff8880173afe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.712137] ^ [ 36.712981] ffff8880173aff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.713941] ffff8880173aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.714889] ================================================================== [ 36.715963] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.601525] BUG: Bad rss-counter state mm:0000000016592c82 type:MM_FILEPAGES val:33 [ 39.602632] BUG: Bad rss-counter state mm:0000000016592c82 type:MM_ANONPAGES val:22 [ 40.163735] BUG: Bad rss-counter state mm:000000000e7dd3e3 type:MM_FILEPAGES val:33 [ 40.165104] BUG: Bad rss-counter state mm:000000000e7dd3e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55820' (ECDSA) to the list of known hosts. 2023/06/19 22:57:26 fuzzer started 2023/06/19 22:57:26 dialing manager at localhost:44161 2023/06/19 22:57:26 checking machine... 2023/06/19 22:57:26 checking revisions... [ 40.933824] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:57:26 testing simple program... [ 40.982241] cgroup: Unknown subsys name 'net' [ 41.041240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:57:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801631b438 RCX=ffffffff818e39f7 RDX=ffff888015fb9b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801689fa80 RSP=ffff88801689fa48 R8 =0000000000000006 R9 =000000006490dd47 R10=000000006490dd47 R11=2f6e6962732f7273 R12=000000006490dd47 R13=000000006490dd47 R14=000000006490dd55 R15=00000000361c1bc2 RIP=ffffffff814c07e4 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 00007f71d2e45900 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=00007f71d33fd0b0 CR3=00000000170b4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f817b1b7040 CR3=000000000cb94000 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=ae3cd0ce0b4171bd0b44a6dae3298123 XMM02=000000000011dd60ec2efd57dc4c00df XMM03=0000000000123f88a8ed381cb48fa7e9 XMM04=32fe83040edca63700000000000ae988 XMM05=19e9129bd510f23500000000001337c0 XMM06=325f52213e7a09df0000000000132998 XMM07=e042d86d42eb936e0000000000124208 XMM08=a8ed381cb48fa7e9000000000011ddc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000