syzkaller login: [ 31.761701] BUG: Bad rss-counter state mm:0000000020a1852f type:MM_FILEPAGES val:33 [ 31.762815] BUG: Bad rss-counter state mm:0000000020a1852f type:MM_ANONPAGES val:22 [ 31.921882] ================================================================== [ 31.922814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.923744] Read of size 8 at addr ffff88800dbc2968 by task sshd/220 [ 31.924519] [ 31.924846] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.925706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.926715] Call Trace: [ 31.927061] [ 31.927347] dump_stack_lvl+0x91/0xf0 [ 31.927833] print_report+0xcc/0x620 [ 31.928317] ? __virt_addr_valid+0x102/0x340 [ 31.928867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.929490] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.930108] kasan_report+0xbe/0xf0 [ 31.930593] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.931221] vma_interval_tree_remove+0xc75/0xec0 [ 31.931822] vma_prepare+0xc54/0x11a0 [ 31.932303] __split_vma+0x5af/0x950 [ 31.932780] ? __pfx___split_vma+0x10/0x10 [ 31.933309] ? find_held_lock+0x2c/0x110 [ 31.933834] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.934412] ? lock_is_held_type+0x9f/0x120 [ 31.934957] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.935562] ? mtree_range_walk+0x632/0x900 [ 31.936114] ? mas_walk+0x5c7/0x7c0 [ 31.936596] do_vmi_munmap+0x1f1/0x2b0 [ 31.937091] mmap_region+0x1f9/0x2660 [ 31.937581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.938098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.938832] ? __pfx_lock_acquire+0x10/0x10 [ 31.939366] ? __pfx_mmap_region+0x10/0x10 [ 31.939897] ? security_mmap_addr+0x7d/0xa0 [ 31.940438] ? get_unmapped_area+0x1f5/0x3f0 [ 31.940991] do_mmap+0x854/0xf00 [ 31.941437] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.941933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.942506] ksys_mmap_pgoff+0x3af/0x500 [ 31.943017] do_syscall_64+0x3f/0x90 [ 31.943495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.944144] RIP: 0033:0x7f674381bd82 [ 31.944601] 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 [ 31.946761] RSP: 002b:00007fffe40779f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.947676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f674381bd82 [ 31.948541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6742c55000 [ 31.949396] RBP: 00007f6742c55000 R08: 0000000000000009 R09: 0000000000001000 [ 31.950252] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608374a4ec0 [ 31.951118] R13: 00007fffe4077a10 R14: 00007fffe4077a40 R15: 00007fffe4077da0 [ 31.951984] [ 31.952277] [ 31.952495] Allocated by task 213: [ 31.952924] kasan_save_stack+0x22/0x50 [ 31.953432] kasan_set_track+0x25/0x30 [ 31.953929] __kasan_slab_alloc+0x59/0x70 [ 31.954470] kmem_cache_alloc+0x16b/0x370 [ 31.954987] vm_area_dup+0x20/0x160 [ 31.955449] __split_vma+0x170/0x950 [ 31.955917] split_vma+0xc6/0x110 [ 31.956361] mprotect_fixup+0x8d2/0xb30 [ 31.956870] do_mprotect_pkey+0x87e/0xd40 [ 31.957399] __x64_sys_mprotect+0x78/0xc0 [ 31.957921] do_syscall_64+0x3f/0x90 [ 31.958401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.959054] [ 31.959274] Freed by task 10: [ 31.959655] kasan_save_stack+0x22/0x50 [ 31.960172] kasan_set_track+0x25/0x30 [ 31.960671] kasan_save_free_info+0x2b/0x50 [ 31.961205] __kasan_slab_free+0x10a/0x190 [ 31.961741] kmem_cache_free+0x10d/0x4d0 [ 31.962251] rcu_core+0x8c8/0x2860 [ 31.962724] __do_softirq+0x1b7/0x7d4 [ 31.963202] [ 31.963428] Last potentially related work creation: [ 31.964014] kasan_save_stack+0x22/0x50 [ 31.964515] __kasan_record_aux_stack+0x8e/0xa0 [ 31.965091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.965742] remove_vma+0x139/0x170 [ 31.966197] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.966761] do_vmi_munmap+0x1f1/0x2b0 [ 31.967251] __vm_munmap+0x138/0x3a0 [ 31.967722] __x64_sys_munmap+0x59/0x80 [ 31.968229] do_syscall_64+0x3f/0x90 [ 31.968708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.969355] [ 31.969572] The buggy address belongs to the object at ffff88800dbc2910 [ 31.969572] which belongs to the cache vm_area_struct of size 168 [ 31.971059] The buggy address is located 88 bytes inside of [ 31.971059] freed 168-byte region [ffff88800dbc2910, ffff88800dbc29b8) [ 31.972474] [ 31.972692] The buggy address belongs to the physical page: [ 31.973364] page:000000000c70883e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbc2 [ 31.974474] memcg:ffff88800db39d01 [ 31.974908] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.975551] page_type: 0xffffffff() [ 31.976006] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.976933] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db39d01 [ 31.977881] page dumped because: kasan: bad access detected [ 31.978581] [ 31.978800] Memory state around the buggy address: [ 31.979404] ffff88800dbc2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.980309] ffff88800dbc2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.981229] >ffff88800dbc2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.982128] ^ [ 31.982962] ffff88800dbc2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.983876] ffff88800dbc2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.984795] ================================================================== [ 31.985886] Disabling lock debugging due to kernel taint [ 34.316570] BUG: Bad rss-counter state mm:0000000047cb0d76 type:MM_FILEPAGES val:33 [ 34.317166] BUG: Bad rss-counter state mm:0000000047cb0d76 type:MM_ANONPAGES val:22 [ 34.696030] BUG: Bad rss-counter state mm:000000001bbacf27 type:MM_FILEPAGES val:33 [ 34.697188] BUG: Bad rss-counter state mm:000000001bbacf27 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15414' (ECDSA) to the list of known hosts. 2023/06/19 17:16:00 fuzzer started 2023/06/19 17:16:00 dialing manager at localhost:44161 2023/06/19 17:16:00 checking machine... 2023/06/19 17:16:00 checking revisions... [ 35.254537] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:16:00 testing simple program... [ 35.306386] cgroup: Unknown subsys name 'net' [ 35.354153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:15:58 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffffffff846000aa RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88800f5e1b40 R15=ffff888016bb80b8 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007fc4d1a95900 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=00007fc4d204a650 CR3=0000000009a9e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=000055adcd1b5648 CR3=000000000dcc0000 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=2030303a36313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000