syzkaller login: [ 65.354999] BUG: Bad rss-counter state mm:00000000863f856f type:MM_FILEPAGES val:33 [ 65.355698] BUG: Bad rss-counter state mm:00000000863f856f type:MM_ANONPAGES val:22 [ 65.487359] ================================================================== [ 65.488394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.489506] Read of size 8 at addr ffff88800fc60ed8 by task sshd/226 [ 65.490601] [ 65.490947] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 65.492013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.493198] Call Trace: [ 65.493579] [ 65.493953] dump_stack_lvl+0x91/0xf0 [ 65.494536] print_report+0xcc/0x620 [ 65.495190] ? __virt_addr_valid+0x102/0x340 [ 65.495935] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.496780] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.497596] kasan_report+0xbe/0xf0 [ 65.498243] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.499086] vma_interval_tree_remove+0xc75/0xec0 [ 65.499809] vma_prepare+0xc54/0x11a0 [ 65.500370] __split_vma+0x5af/0x950 [ 65.500953] ? __pfx___split_vma+0x10/0x10 [ 65.501568] ? find_held_lock+0x2c/0x110 [ 65.502189] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.502880] ? lock_is_held_type+0x9f/0x120 [ 65.503510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.504242] ? mtree_range_walk+0x632/0x900 [ 65.504917] ? mas_walk+0x5c7/0x7c0 [ 65.505476] do_vmi_munmap+0x1f1/0x2b0 [ 65.506068] mmap_region+0x1f9/0x2660 [ 65.506662] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.507260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.508114] ? __pfx_lock_acquire+0x10/0x10 [ 65.508762] ? __pfx_mmap_region+0x10/0x10 [ 65.509392] ? security_mmap_addr+0x7d/0xa0 [ 65.510029] ? get_unmapped_area+0x1f5/0x3f0 [ 65.510720] do_mmap+0x854/0xf00 [ 65.511233] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.511832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.512493] ksys_mmap_pgoff+0x3af/0x500 [ 65.513125] do_syscall_64+0x3f/0x90 [ 65.513710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.514464] RIP: 0033:0x7fa4cf66ed82 [ 65.515034] 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 [ 65.517592] RSP: 002b:00007ffc87d70348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.518710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4cf66ed82 [ 65.519717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4ceaa8000 [ 65.520732] RBP: 00007fa4ceaa8000 R08: 0000000000000009 R09: 0000000000001000 [ 65.521750] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557e5ffcb20 [ 65.522777] R13: 00007ffc87d70360 R14: 00007ffc87d70390 R15: 00007ffc87d706f0 [ 65.523797] [ 65.524138] [ 65.524387] Allocated by task 218: [ 65.524919] kasan_save_stack+0x22/0x50 [ 65.525511] kasan_set_track+0x25/0x30 [ 65.526106] __kasan_slab_alloc+0x59/0x70 [ 65.526748] kmem_cache_alloc+0x16b/0x370 [ 65.527357] vm_area_dup+0x20/0x160 [ 65.527907] __split_vma+0x170/0x950 [ 65.528458] split_vma+0xc6/0x110 [ 65.529006] mprotect_fixup+0x8d2/0xb30 [ 65.529596] do_mprotect_pkey+0x87e/0xd40 [ 65.530226] __x64_sys_mprotect+0x78/0xc0 [ 65.530959] do_syscall_64+0x3f/0x90 [ 65.531613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.532384] [ 65.532652] Freed by task 218: [ 65.533118] kasan_save_stack+0x22/0x50 [ 65.533691] kasan_set_track+0x25/0x30 [ 65.534246] kasan_save_free_info+0x2b/0x50 [ 65.534886] __kasan_slab_free+0x10a/0x190 [ 65.535473] kmem_cache_free+0x10d/0x4d0 [ 65.536073] rcu_core+0x8c8/0x2860 [ 65.536573] __do_softirq+0x1b7/0x7d4 [ 65.537132] [ 65.537374] Last potentially related work creation: [ 65.538052] kasan_save_stack+0x22/0x50 [ 65.538651] __kasan_record_aux_stack+0x8e/0xa0 [ 65.539297] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.540057] remove_vma+0x139/0x170 [ 65.540557] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.541220] do_vmi_munmap+0x1f1/0x2b0 [ 65.541784] __vm_munmap+0x138/0x3a0 [ 65.542301] __x64_sys_munmap+0x59/0x80 [ 65.542882] do_syscall_64+0x3f/0x90 [ 65.543410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.544158] [ 65.544394] The buggy address belongs to the object at ffff88800fc60e80 [ 65.544394] which belongs to the cache vm_area_struct of size 168 [ 65.546095] The buggy address is located 88 bytes inside of [ 65.546095] freed 168-byte region [ffff88800fc60e80, ffff88800fc60f28) [ 65.547730] [ 65.547969] The buggy address belongs to the physical page: [ 65.548726] page:00000000c584b600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc60 [ 65.549935] memcg:ffff888019607101 [ 65.550419] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.551161] page_type: 0xffffffff() [ 65.551687] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 65.552741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019607101 [ 65.553790] page dumped because: kasan: bad access detected [ 65.554537] [ 65.554823] Memory state around the buggy address: [ 65.555464] ffff88800fc60d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 65.556461] ffff88800fc60e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 65.557471] >ffff88800fc60e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.558450] ^ [ 65.559308] ffff88800fc60f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 65.560294] ffff88800fc60f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.561292] ================================================================== [ 65.562384] Disabling lock debugging due to kernel taint [ 67.564900] BUG: Bad rss-counter state mm:00000000dfeec005 type:MM_FILEPAGES val:33 [ 67.566091] BUG: Bad rss-counter state mm:00000000dfeec005 type:MM_ANONPAGES val:22 [ 68.040550] BUG: Bad rss-counter state mm:0000000065da587d type:MM_FILEPAGES val:33 [ 68.041536] BUG: Bad rss-counter state mm:0000000065da587d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5803' (ECDSA) to the list of known hosts. 2023/06/20 14:26:12 fuzzer started 2023/06/20 14:26:12 dialing manager at localhost:36067 2023/06/20 14:26:12 checking machine... 2023/06/20 14:26:12 checking revisions... [ 68.670861] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:26:12 testing simple program... [ 68.722757] cgroup: Unknown subsys name 'net' [ 68.775584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000e016 RCX=0000000000000018 RDX=0000000000000003 RSI=ffffffff813cb589 RDI=0000000000000007 RBP=ffff88806ce2b988 RSP=ffff88806ce09ed8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000fc7b48ee0 R13=dffffc0000000000 R14=ffff88806ce2baa8 R15=0000000000000003 RIP=ffffffff813cb5c9 RFL=00000046 [---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 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=00007ffeda8a4e28 CR3=0000000018fe4000 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=2031313a36323a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015837520 RCX=0000000000000001 RDX=1ffff11002b06eaf RSI=ffff888015837af0 RDI=ffffffff83635bd7 RBP=ffff888015837578 RSP=ffff888015837508 R8 =0000000000000001 R9 =ffff888015837560 R10=0000000000038001 R11=000000000009a9bb R12=ffff8880158375e8 R13=0000000000000000 R14=ffff888015838000 R15=ffff88800c66b100 RIP=ffffffff811303b2 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 00007fe48fef7900 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=00007f49f29b4650 CR3=000000000d4a2000 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=b9b7e75600ca37a08641351823e89fbb XMM02=ec2efd57dc4c00df000000000011acf8 XMM03=c80104038a8fedf4000000000011adc8 XMM04=28a6c5073134744b00000000000ae988 XMM05=499766d7261591a70000000000133478 XMM06=e8008b1642ea3e600000000000132268 XMM07=fb795ef6d65770560000000000121e10 XMM08=2c67c8bc2e329bc3000000000011ad68 XMM09=00000000000000000000000000000000 XMM10=20002000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000