syzkaller login: [ 31.467460] BUG: Bad rss-counter state mm:000000009612b6c1 type:MM_FILEPAGES val:33 [ 31.468152] BUG: Bad rss-counter state mm:000000009612b6c1 type:MM_ANONPAGES val:22 [ 31.594907] ================================================================== [ 31.595597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.596217] Read of size 8 at addr ffff88801580e310 by task sshd/221 [ 31.596712] [ 31.596860] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.597446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.598129] Call Trace: [ 31.598352] [ 31.598546] dump_stack_lvl+0x91/0xf0 [ 31.598882] print_report+0xcc/0x620 [ 31.599277] ? __virt_addr_valid+0x102/0x340 [ 31.599824] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600244] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600675] kasan_report+0xbe/0xf0 [ 31.600997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601395] vma_interval_tree_remove+0xc75/0xec0 [ 31.601857] vma_prepare+0xc54/0x11a0 [ 31.602199] __split_vma+0x5af/0x950 [ 31.602525] ? __pfx___split_vma+0x10/0x10 [ 31.602896] ? find_held_lock+0x2c/0x110 [ 31.603295] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.603666] ? lock_is_held_type+0x9f/0x120 [ 31.604014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.604427] ? mtree_range_walk+0x632/0x900 [ 31.604819] ? mas_walk+0x5c7/0x7c0 [ 31.605153] do_vmi_munmap+0x1f1/0x2b0 [ 31.605495] mmap_region+0x1f9/0x2660 [ 31.605832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.606187] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.606655] ? __pfx_lock_acquire+0x10/0x10 [ 31.607023] ? __pfx_mmap_region+0x10/0x10 [ 31.607463] ? security_mmap_addr+0x7d/0xa0 [ 31.607820] ? get_unmapped_area+0x1f5/0x3f0 [ 31.608213] do_mmap+0x854/0xf00 [ 31.608516] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.608830] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.609190] ksys_mmap_pgoff+0x3af/0x500 [ 31.609518] do_syscall_64+0x3f/0x90 [ 31.609847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.610305] RIP: 0033:0x7f624a721d82 [ 31.610630] 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 [ 31.612144] RSP: 002b:00007ffde5e9a228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.612758] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f624a721d82 [ 31.613345] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6249b5b000 [ 31.613932] RBP: 00007f6249b5b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.614502] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637b95a1ec0 [ 31.615065] R13: 00007ffde5e9a240 R14: 00007ffde5e9a270 R15: 00007ffde5e9a5d0 [ 31.615675] [ 31.615864] [ 31.616018] Allocated by task 214: [ 31.616313] kasan_save_stack+0x22/0x50 [ 31.616656] kasan_set_track+0x25/0x30 [ 31.616992] __kasan_slab_alloc+0x59/0x70 [ 31.617353] kmem_cache_alloc+0x16b/0x370 [ 31.617702] vm_area_dup+0x20/0x160 [ 31.618015] __split_vma+0x170/0x950 [ 31.618331] split_vma+0xc6/0x110 [ 31.618637] mprotect_fixup+0x8d2/0xb30 [ 31.618989] do_mprotect_pkey+0x87e/0xd40 [ 31.619408] __x64_sys_mprotect+0x78/0xc0 [ 31.619781] do_syscall_64+0x3f/0x90 [ 31.620114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.620550] [ 31.620690] Freed by task 214: [ 31.620958] kasan_save_stack+0x22/0x50 [ 31.621312] kasan_set_track+0x25/0x30 [ 31.621649] kasan_save_free_info+0x2b/0x50 [ 31.622020] __kasan_slab_free+0x10a/0x190 [ 31.622376] kmem_cache_free+0x10d/0x4d0 [ 31.622734] rcu_core+0x8c8/0x2860 [ 31.623044] __do_softirq+0x1b7/0x7d4 [ 31.623402] [ 31.623545] Last potentially related work creation: [ 31.623947] kasan_save_stack+0x22/0x50 [ 31.624307] __kasan_record_aux_stack+0x8e/0xa0 [ 31.624715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.625156] remove_vma+0x139/0x170 [ 31.625470] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.625849] do_vmi_munmap+0x1f1/0x2b0 [ 31.626187] __vm_munmap+0x138/0x3a0 [ 31.626506] __x64_sys_munmap+0x59/0x80 [ 31.626851] do_syscall_64+0x3f/0x90 [ 31.627248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.627695] [ 31.627844] The buggy address belongs to the object at ffff88801580e2b8 [ 31.627844] which belongs to the cache vm_area_struct of size 168 [ 31.628871] The buggy address is located 88 bytes inside of [ 31.628871] freed 168-byte region [ffff88801580e2b8, ffff88801580e360) [ 31.629853] [ 31.630006] The buggy address belongs to the physical page: [ 31.630450] page:00000000c5b0e052 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1580e [ 31.631218] memcg:ffff888015a85401 [ 31.631501] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.631940] page_type: 0xffffffff() [ 31.632248] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.632876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a85401 [ 31.633484] page dumped because: kasan: bad access detected [ 31.633937] [ 31.634088] Memory state around the buggy address: [ 31.634480] ffff88801580e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.635073] ffff88801580e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.635683] >ffff88801580e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.636265] ^ [ 31.636579] ffff88801580e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.637181] ffff88801580e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.637760] ================================================================== [ 31.638463] Disabling lock debugging due to kernel taint [ 33.118609] BUG: Bad rss-counter state mm:0000000003ae4472 type:MM_FILEPAGES val:33 [ 33.119370] BUG: Bad rss-counter state mm:0000000003ae4472 type:MM_ANONPAGES val:22 [ 33.549498] BUG: Bad rss-counter state mm:00000000352e9bb1 type:MM_FILEPAGES val:33 [ 33.550209] BUG: Bad rss-counter state mm:00000000352e9bb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64890' (ECDSA) to the list of known hosts. 2023/06/21 09:50:14 fuzzer started 2023/06/21 09:50:14 dialing manager at localhost:36067 2023/06/21 09:50:14 checking machine... 2023/06/21 09:50:14 checking revisions... [ 34.074380] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:50:14 testing simple program... [ 34.109451] cgroup: Unknown subsys name 'net' [ 34.149837] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:14 Registers: info registers vcpu 0 RAX=00000000000b54e7 RBX=0000000000000001 RCX=ffffffff84514287 RDX=00000000000b54e8 RSI=0000000000035142 RDI=ffffffff864b3a78 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b3a72 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130861 RFL=00000297 [--S-APC] 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 0000000000000000 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=00007fff255f93a8 CR3=000000000fcf6000 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=2033313a30353a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a30353a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=86a349203f866000 RBX=ffffed100204fe60 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff88801027f390 RBP=ffff88800844f780 RSP=ffff88801027f300 R8 =ffff88800e8c64c0 R9 =0000000000000000 R10=ffffed1001d18c98 R11=ffffffff81806f71 R12=00000000000928c0 R13=00000000000928c0 R14=0000000000000000 R15=00000000000928c0 RIP=ffffffff813ad6e9 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 00007f34daf3b900 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=00007f34db4f2618 CR3=0000000015edc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000