syzkaller login: [ 28.791188] BUG: Bad rss-counter state mm:000000009eea875e type:MM_FILEPAGES val:33 [ 28.792391] BUG: Bad rss-counter state mm:000000009eea875e type:MM_ANONPAGES val:22 [ 28.966338] ================================================================== [ 28.967250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.968196] Read of size 8 at addr ffff8880182a5058 by task sshd/221 [ 28.968974] [ 28.969196] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.970306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.971294] Call Trace: [ 28.971617] [ 28.971903] dump_stack_lvl+0x91/0xf0 [ 28.972427] print_report+0xcc/0x620 [ 28.972929] ? __virt_addr_valid+0x102/0x340 [ 28.973497] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974149] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974766] kasan_report+0xbe/0xf0 [ 28.975254] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.975894] vma_interval_tree_remove+0xc75/0xec0 [ 28.976506] vma_prepare+0xc54/0x11a0 [ 28.976991] __split_vma+0x5af/0x950 [ 28.977466] ? __pfx___split_vma+0x10/0x10 [ 28.978002] ? find_held_lock+0x2c/0x110 [ 28.978518] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.979097] ? lock_is_held_type+0x9f/0x120 [ 28.979639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.980260] ? mtree_range_walk+0x632/0x900 [ 28.980822] ? mas_walk+0x5c7/0x7c0 [ 28.981301] do_vmi_munmap+0x1f1/0x2b0 [ 28.981811] mmap_region+0x1f9/0x2660 [ 28.982300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.982808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.983545] ? __pfx_lock_acquire+0x10/0x10 [ 28.984087] ? __pfx_mmap_region+0x10/0x10 [ 28.984619] ? security_mmap_addr+0x7d/0xa0 [ 28.985170] ? get_unmapped_area+0x1f5/0x3f0 [ 28.985760] do_mmap+0x854/0xf00 [ 28.986206] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.986707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.987270] ksys_mmap_pgoff+0x3af/0x500 [ 28.987779] do_syscall_64+0x3f/0x90 [ 28.988274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988922] RIP: 0033:0x7f20c2665d82 [ 28.989385] 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 [ 28.991547] RSP: 002b:00007ffc80ab93b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.992463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20c2665d82 [ 28.993321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20c1a9f000 [ 28.994183] RBP: 00007f20c1a9f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.995058] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556505380f70 [ 28.995918] R13: 00007ffc80ab93d0 R14: 00007ffc80ab9400 R15: 00007ffc80ab9760 [ 28.996790] [ 28.997084] [ 28.997296] Allocated by task 212: [ 28.997751] kasan_save_stack+0x22/0x50 [ 28.998268] kasan_set_track+0x25/0x30 [ 28.998772] __kasan_slab_alloc+0x59/0x70 [ 28.999306] kmem_cache_alloc+0x16b/0x370 [ 28.999843] vm_area_dup+0x20/0x160 [ 29.000309] __split_vma+0x170/0x950 [ 29.000774] split_vma+0xc6/0x110 [ 29.001218] mprotect_fixup+0x8d2/0xb30 [ 29.001741] do_mprotect_pkey+0x87e/0xd40 [ 29.002258] __x64_sys_mprotect+0x78/0xc0 [ 29.002776] do_syscall_64+0x3f/0x90 [ 29.003253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.003896] [ 29.004114] Freed by task 13: [ 29.004497] kasan_save_stack+0x22/0x50 [ 29.004998] kasan_set_track+0x25/0x30 [ 29.005496] kasan_save_free_info+0x2b/0x50 [ 29.006047] __kasan_slab_free+0x10a/0x190 [ 29.006586] kmem_cache_free+0x10d/0x4d0 [ 29.007098] rcu_core+0x8c8/0x2860 [ 29.007557] __do_softirq+0x1b7/0x7d4 [ 29.008042] [ 29.008259] Last potentially related work creation: [ 29.008855] kasan_save_stack+0x22/0x50 [ 29.009362] __kasan_record_aux_stack+0x8e/0xa0 [ 29.009973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.010628] remove_vma+0x139/0x170 [ 29.011151] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.011744] do_vmi_munmap+0x1f1/0x2b0 [ 29.012229] __vm_munmap+0x138/0x3a0 [ 29.012696] __x64_sys_munmap+0x59/0x80 [ 29.013194] do_syscall_64+0x3f/0x90 [ 29.013695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.014343] [ 29.014556] The buggy address belongs to the object at ffff8880182a5000 [ 29.014556] which belongs to the cache vm_area_struct of size 168 [ 29.016024] The buggy address is located 88 bytes inside of [ 29.016024] freed 168-byte region [ffff8880182a5000, ffff8880182a50a8) [ 29.017426] [ 29.017647] The buggy address belongs to the physical page: [ 29.018308] page:00000000617e1aaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182a5 [ 29.019406] memcg:ffff88800e624001 [ 29.019834] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.020550] page_type: 0xffffffff() [ 29.021021] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bf80 dead000000000003 [ 29.021973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e624001 [ 29.022890] page dumped because: kasan: bad access detected [ 29.023555] [ 29.023780] Memory state around the buggy address: [ 29.024367] ffff8880182a4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.025224] ffff8880182a4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.026123] >ffff8880182a5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.026981] ^ [ 29.027710] ffff8880182a5080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 29.028586] ffff8880182a5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.029449] ================================================================== [ 29.030378] Disabling lock debugging due to kernel taint [ 31.101733] BUG: Bad rss-counter state mm:00000000161fbc06 type:MM_FILEPAGES val:33 [ 31.102887] BUG: Bad rss-counter state mm:00000000161fbc06 type:MM_ANONPAGES val:22 [ 31.556719] BUG: Bad rss-counter state mm:00000000525bfb3d type:MM_FILEPAGES val:33 [ 31.557985] BUG: Bad rss-counter state mm:00000000525bfb3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46815' (ECDSA) to the list of known hosts. 2023/06/21 00:49:21 fuzzer started 2023/06/21 00:49:21 dialing manager at localhost:36067 2023/06/21 00:49:21 checking machine... 2023/06/21 00:49:21 checking revisions... [ 32.274029] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:49:21 testing simple program... [ 32.329087] cgroup: Unknown subsys name 'net' [ 32.366241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86139744 RDX=0000000000000008 RSI=ffff888015c7f820 RDI=ffff888015c7f4b8 RBP=ffff888015c7f510 RSP=ffff888015c7f428 R8 =ffffffff86139748 R9 =ffff888015c7f4f8 R10=0000000000038001 R11=0000000000020f03 R12=ffff888015c7f518 R13=ffff888015c7f500 R14=ffff888015c7f828 R15=ffff888015c7f4b8 RIP=ffffffff81130400 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 00007f23c8c38700 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=00007f118be43650 CR3=000000000e2fa000 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=2031323a39343a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39343a3030203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffffffffffff RCX=0000000000000100 RDX=ffff888014749b40 RSI=ffffffff813ba373 RDI=ffff88806cf293d8 RBP=ffff88806cf293c0 RSP=ffff88806cf09e30 R8 =0000000000000007 R9 =0000000000000000 R10=ffffffffffffffff R11=0000000000000001 R12=ffff88806cf293c0 R13=dffffc0000000000 R14=fffffbfff0a81e40 R15=1ffff1100d9e5282 RIP=ffffffff812d8664 RFL=00000086 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1fa0fd3900 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=00007f1fa04b3db8 CR3=000000000b364000 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=a29a7db480b4530600000000000ae988 XMM05=2a50a52ca9a8d2b30000000000132f88 XMM06=19e9129bd510f2350000000000131e20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000