syzkaller login: [ 41.852382] BUG: Bad rss-counter state mm:000000006729c3af type:MM_FILEPAGES val:33 [ 41.854359] BUG: Bad rss-counter state mm:000000006729c3af type:MM_ANONPAGES val:22 [ 42.018272] ================================================================== [ 42.019247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.020232] Read of size 8 at addr ffff88800df8f798 by task sshd/221 [ 42.021217] [ 42.021451] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.022371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.023453] Call Trace: [ 42.023795] [ 42.024098] dump_stack_lvl+0x91/0xf0 [ 42.024615] print_report+0xcc/0x620 [ 42.025126] ? __virt_addr_valid+0x102/0x340 [ 42.025715] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.026365] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.027030] kasan_report+0xbe/0xf0 [ 42.027536] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.028195] vma_interval_tree_remove+0xc75/0xec0 [ 42.028840] vma_prepare+0xc54/0x11a0 [ 42.029354] __split_vma+0x5af/0x950 [ 42.029863] ? __pfx___split_vma+0x10/0x10 [ 42.030435] ? find_held_lock+0x2c/0x110 [ 42.031011] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.031619] ? lock_is_held_type+0x9f/0x120 [ 42.032195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.032844] ? mtree_range_walk+0x632/0x900 [ 42.033436] ? mas_walk+0x5c7/0x7c0 [ 42.033950] do_vmi_munmap+0x1f1/0x2b0 [ 42.034486] mmap_region+0x1f9/0x2660 [ 42.035014] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.035557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.036325] ? __pfx_lock_acquire+0x10/0x10 [ 42.036897] ? __pfx_mmap_region+0x10/0x10 [ 42.037471] ? security_mmap_addr+0x7d/0xa0 [ 42.038043] ? get_unmapped_area+0x1f5/0x3f0 [ 42.038637] do_mmap+0x854/0xf00 [ 42.039116] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.039653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.040259] ksys_mmap_pgoff+0x3af/0x500 [ 42.040798] do_syscall_64+0x3f/0x90 [ 42.041303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.041994] RIP: 0033:0x7fbd1f101d82 [ 42.042490] 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 [ 42.044866] RSP: 002b:00007ffd875aa2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.045809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd1f101d82 [ 42.046699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd1e53b000 [ 42.047627] RBP: 00007fbd1e53b000 R08: 0000000000000009 R09: 0000000000001000 [ 42.048582] R10: 0000000000000812 R11: 0000000000000206 R12: 000056222a4faf70 [ 42.049531] R13: 00007ffd875aa2f0 R14: 00007ffd875aa320 R15: 00007ffd875aa680 [ 42.050428] [ 42.050749] [ 42.050977] Allocated by task 214: [ 42.051426] kasan_save_stack+0x22/0x50 [ 42.051952] kasan_set_track+0x25/0x30 [ 42.052471] __kasan_slab_alloc+0x59/0x70 [ 42.053016] kmem_cache_alloc+0x16b/0x370 [ 42.053559] vm_area_dup+0x20/0x160 [ 42.054032] __split_vma+0x170/0x950 [ 42.054538] split_vma+0xc6/0x110 [ 42.055003] mprotect_fixup+0x8d2/0xb30 [ 42.055527] do_mprotect_pkey+0x87e/0xd40 [ 42.056068] __x64_sys_mprotect+0x78/0xc0 [ 42.056617] do_syscall_64+0x3f/0x90 [ 42.057110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.057782] [ 42.058007] Freed by task 214: [ 42.058423] kasan_save_stack+0x22/0x50 [ 42.058960] kasan_set_track+0x25/0x30 [ 42.059479] kasan_save_free_info+0x2b/0x50 [ 42.060036] __kasan_slab_free+0x10a/0x190 [ 42.060589] kmem_cache_free+0x10d/0x4d0 [ 42.061123] rcu_core+0x8c8/0x2860 [ 42.061587] __do_softirq+0x1b7/0x7d4 [ 42.062176] [ 42.062405] Last potentially related work creation: [ 42.063027] kasan_save_stack+0x22/0x50 [ 42.063553] __kasan_record_aux_stack+0x8e/0xa0 [ 42.064156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.064825] remove_vma+0x139/0x170 [ 42.065297] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.065881] do_vmi_munmap+0x1f1/0x2b0 [ 42.066392] __vm_munmap+0x138/0x3a0 [ 42.066885] __x64_sys_munmap+0x59/0x80 [ 42.067410] do_syscall_64+0x3f/0x90 [ 42.067907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.068586] [ 42.068814] Second to last potentially related work creation: [ 42.069528] kasan_save_stack+0x22/0x50 [ 42.070057] __kasan_record_aux_stack+0x8e/0xa0 [ 42.070663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.071339] remove_vma+0x139/0x170 [ 42.071809] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.072394] do_vmi_munmap+0x1f1/0x2b0 [ 42.072906] mmap_region+0x1f9/0x2660 [ 42.073406] do_mmap+0x854/0xf00 [ 42.073861] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.074377] ksys_mmap_pgoff+0x7d/0x500 [ 42.074906] do_syscall_64+0x3f/0x90 [ 42.075401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.076071] [ 42.076299] The buggy address belongs to the object at ffff88800df8f740 [ 42.076299] which belongs to the cache vm_area_struct of size 168 [ 42.077830] The buggy address is located 88 bytes inside of [ 42.077830] freed 168-byte region [ffff88800df8f740, ffff88800df8f7e8) [ 42.079316] [ 42.079544] The buggy address belongs to the physical page: [ 42.080230] page:0000000056830e81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf8f [ 42.081360] memcg:ffff88800dc80501 [ 42.081809] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.082556] page_type: 0xffffffff() [ 42.083027] raw: 0100000000000200 ffff88800879fc80 ffffea000035a700 dead000000000003 [ 42.083976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc80501 [ 42.084946] page dumped because: kasan: bad access detected [ 42.085638] [ 42.085863] Memory state around the buggy address: [ 42.086470] ffff88800df8f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.087378] ffff88800df8f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.088268] >ffff88800df8f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.089157] ^ [ 42.089670] ffff88800df8f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 42.090574] ffff88800df8f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 42.091467] ================================================================== [ 42.092444] Disabling lock debugging due to kernel taint [ 44.372729] BUG: Bad rss-counter state mm:0000000079b80081 type:MM_FILEPAGES val:33 [ 44.373981] BUG: Bad rss-counter state mm:0000000079b80081 type:MM_ANONPAGES val:22 [ 44.841285] BUG: Bad rss-counter state mm:000000001c294925 type:MM_FILEPAGES val:33 [ 44.843076] BUG: Bad rss-counter state mm:000000001c294925 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16827' (ECDSA) to the list of known hosts. 2023/06/19 20:29:58 fuzzer started 2023/06/19 20:29:58 dialing manager at localhost:44161 2023/06/19 20:29:58 checking machine... 2023/06/19 20:29:58 checking revisions... [ 45.724440] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:29:58 testing simple program... [ 45.775708] cgroup: Unknown subsys name 'net' [ 45.851935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:29:46 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88800b9ec0a0 RCX=0000000000000002 RDX=0000000000000003 RSI=ffffffff81f35286 RDI=ffff888010c59bb8 RBP=ffff888010c59bb8 RSP=ffff88800fe2f940 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800b9ec0a8 R13=ffff888010c59bb8 R14=ffff88800fe2fc60 R15=0000000000001032 RIP=ffffffff844d328d 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 00007f0ba645a900 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=00007f0ba6a0f650 CR3=000000000e512000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffdd5dafa88 CR3=000000000dd74000 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=2037353a39323a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a39323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000