syzkaller login: [ 31.341295] BUG: Bad rss-counter state mm:00000000fa7069fc type:MM_FILEPAGES val:33 [ 31.342766] BUG: Bad rss-counter state mm:00000000fa7069fc type:MM_ANONPAGES val:22 [ 31.517077] ================================================================== [ 31.518080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.519136] Read of size 8 at addr ffff888019dbcdf0 by task sshd/220 [ 31.520092] [ 31.520329] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.521274] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.522360] Call Trace: [ 31.522727] [ 31.523042] dump_stack_lvl+0x91/0xf0 [ 31.523578] print_report+0xcc/0x620 [ 31.524108] ? __virt_addr_valid+0x102/0x340 [ 31.524711] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.525382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.526043] kasan_report+0xbe/0xf0 [ 31.526585] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.527251] vma_interval_tree_remove+0xc75/0xec0 [ 31.527893] vma_prepare+0xc54/0x11a0 [ 31.528403] __split_vma+0x5af/0x950 [ 31.528907] ? __pfx___split_vma+0x10/0x10 [ 31.529469] ? find_held_lock+0x2c/0x110 [ 31.530030] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.530672] ? lock_is_held_type+0x9f/0x120 [ 31.531253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.531900] ? mtree_range_walk+0x632/0x900 [ 31.532494] ? mas_walk+0x5c7/0x7c0 [ 31.533004] do_vmi_munmap+0x1f1/0x2b0 [ 31.533536] mmap_region+0x1f9/0x2660 [ 31.534051] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.534655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.535450] ? __pfx_lock_acquire+0x10/0x10 [ 31.536039] ? __pfx_mmap_region+0x10/0x10 [ 31.536623] ? security_mmap_addr+0x7d/0xa0 [ 31.537212] ? get_unmapped_area+0x1f5/0x3f0 [ 31.537820] do_mmap+0x854/0xf00 [ 31.538307] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.538901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.539523] ksys_mmap_pgoff+0x3af/0x500 [ 31.540089] do_syscall_64+0x3f/0x90 [ 31.540624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.541344] RIP: 0033:0x7f8cbd9a4d82 [ 31.541852] 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 [ 31.544265] RSP: 002b:00007ffcfbf47c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.545278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cbd9a4d82 [ 31.546215] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cbcdde000 [ 31.547188] RBP: 00007f8cbcdde000 R08: 0000000000000009 R09: 0000000000001000 [ 31.548128] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c113fbec0 [ 31.549069] R13: 00007ffcfbf47ca0 R14: 00007ffcfbf47cd0 R15: 00007ffcfbf48030 [ 31.550042] [ 31.550391] [ 31.550637] Allocated by task 213: [ 31.551112] kasan_save_stack+0x22/0x50 [ 31.551674] kasan_set_track+0x25/0x30 [ 31.552224] __kasan_slab_alloc+0x59/0x70 [ 31.552803] kmem_cache_alloc+0x16b/0x370 [ 31.553374] vm_area_dup+0x20/0x160 [ 31.553881] __split_vma+0x170/0x950 [ 31.554430] split_vma+0xc6/0x110 [ 31.554926] mprotect_fixup+0x8d2/0xb30 [ 31.555479] do_mprotect_pkey+0x87e/0xd40 [ 31.556056] __x64_sys_mprotect+0x78/0xc0 [ 31.556643] do_syscall_64+0x3f/0x90 [ 31.557173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.557888] [ 31.558127] Freed by task 213: [ 31.558589] kasan_save_stack+0x22/0x50 [ 31.559149] kasan_set_track+0x25/0x30 [ 31.559694] kasan_save_free_info+0x2b/0x50 [ 31.560288] __kasan_slab_free+0x10a/0x190 [ 31.560968] kmem_cache_free+0x10d/0x4d0 [ 31.561533] rcu_core+0x8c8/0x2860 [ 31.562026] __do_softirq+0x1b7/0x7d4 [ 31.562604] [ 31.562842] Last potentially related work creation: [ 31.563492] kasan_save_stack+0x22/0x50 [ 31.564046] __kasan_record_aux_stack+0x8e/0xa0 [ 31.564687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.565401] remove_vma+0x139/0x170 [ 31.565902] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.566552] do_vmi_munmap+0x1f1/0x2b0 [ 31.567091] __vm_munmap+0x138/0x3a0 [ 31.567611] __x64_sys_munmap+0x59/0x80 [ 31.568158] do_syscall_64+0x3f/0x90 [ 31.568687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.569398] [ 31.569634] Second to last potentially related work creation: [ 31.570424] kasan_save_stack+0x22/0x50 [ 31.570988] __kasan_record_aux_stack+0x8e/0xa0 [ 31.571614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.572329] remove_vma+0x139/0x170 [ 31.572832] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.573454] do_vmi_munmap+0x1f1/0x2b0 [ 31.573995] mmap_region+0x1f9/0x2660 [ 31.574557] do_mmap+0x854/0xf00 [ 31.575035] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.575577] ksys_mmap_pgoff+0x3af/0x500 [ 31.576135] do_syscall_64+0x3f/0x90 [ 31.576667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.577378] [ 31.577617] The buggy address belongs to the object at ffff888019dbcd98 [ 31.577617] which belongs to the cache vm_area_struct of size 168 [ 31.579287] The buggy address is located 88 bytes inside of [ 31.579287] freed 168-byte region [ffff888019dbcd98, ffff888019dbce40) [ 31.580847] [ 31.581090] The buggy address belongs to the physical page: [ 31.581832] page:00000000dd902b29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dbc [ 31.583071] memcg:ffff88800fb41401 [ 31.583544] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.584319] page_type: 0xffffffff() [ 31.584823] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a2280 000000000000000b [ 31.585848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb41401 [ 31.586885] page dumped because: kasan: bad access detected [ 31.587624] [ 31.587863] Memory state around the buggy address: [ 31.588509] ffff888019dbcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.589461] ffff888019dbcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.590452] >ffff888019dbcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.591402] ^ [ 31.592304] ffff888019dbce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.593262] ffff888019dbce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.594212] ================================================================== [ 31.595416] Disabling lock debugging due to kernel taint [ 33.639126] BUG: Bad rss-counter state mm:0000000096621c7a type:MM_FILEPAGES val:33 [ 33.640407] BUG: Bad rss-counter state mm:0000000096621c7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62299' (ECDSA) to the list of known hosts. [ 34.153688] BUG: Bad rss-counter state mm:000000004937e720 type:MM_FILEPAGES val:33 [ 34.154843] BUG: Bad rss-counter state mm:000000004937e720 type:MM_ANONPAGES val:22 2023/06/21 08:14:46 fuzzer started 2023/06/21 08:14:46 dialing manager at localhost:36067 2023/06/21 08:14:46 checking machine... 2023/06/21 08:14:46 checking revisions... [ 34.773924] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:14:46 testing simple program... [ 34.810684] cgroup: Unknown subsys name 'net' [ 34.863300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:14:46 Registers: info registers vcpu 0 RAX=ffffed1001fd6c70 RBX=ffffed1001fd6c71 RCX=ffffffff81afc021 RDX=ffffed1001fd6c71 RSI=0000000000000008 RDI=ffff88800feb6380 RBP=ffffed1001fd6c70 RSP=ffff888018c2f940 R8 =0000000000000000 R9 =ffffed1001fd6c70 R10=ffff88800feb6387 R11=0000000000000001 R12=ffff88800ddeb400 R13=ffff8880166e8cc0 R14=ffff88800feb6380 R15=1ffff11003185f33 RIP=ffffffff8180f189 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 00007f9202d85900 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=00007f920333d0b0 CR3=000000000e0a6000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe75213a2a0 CR3=000000000fbd4000 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=2036343a34313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a34313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000