syzkaller login: [ 63.390939] BUG: Bad rss-counter state mm:000000001644a479 type:MM_FILEPAGES val:33 [ 63.391974] BUG: Bad rss-counter state mm:000000001644a479 type:MM_ANONPAGES val:22 [ 63.564374] ================================================================== [ 63.565464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.566620] Read of size 8 at addr ffff88801a186ed8 by task sshd/226 [ 63.567709] [ 63.567970] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.569038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.570274] Call Trace: [ 63.570665] [ 63.571015] dump_stack_lvl+0x91/0xf0 [ 63.571622] print_report+0xcc/0x620 [ 63.572212] ? __virt_addr_valid+0x102/0x340 [ 63.572890] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.573657] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.574412] kasan_report+0xbe/0xf0 [ 63.574989] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.575776] vma_interval_tree_remove+0xc75/0xec0 [ 63.576521] vma_prepare+0xc54/0x11a0 [ 63.577098] __split_vma+0x5af/0x950 [ 63.577676] ? __pfx___split_vma+0x10/0x10 [ 63.578323] ? find_held_lock+0x2c/0x110 [ 63.578969] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.579687] ? lock_is_held_type+0x9f/0x120 [ 63.580344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.581098] ? mtree_range_walk+0x632/0x900 [ 63.581778] ? mas_walk+0x5c7/0x7c0 [ 63.582359] do_vmi_munmap+0x1f1/0x2b0 [ 63.582972] mmap_region+0x1f9/0x2660 [ 63.583563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.584183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.585063] ? __pfx_lock_acquire+0x10/0x10 [ 63.585720] ? __pfx_mmap_region+0x10/0x10 [ 63.586374] ? security_mmap_addr+0x7d/0xa0 [ 63.587030] ? get_unmapped_area+0x1f5/0x3f0 [ 63.587722] do_mmap+0x854/0xf00 [ 63.588252] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.588857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.589544] ksys_mmap_pgoff+0x3af/0x500 [ 63.590163] do_syscall_64+0x3f/0x90 [ 63.590755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.591568] RIP: 0033:0x7f0245a28d82 [ 63.592133] 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 [ 63.594764] RSP: 002b:00007fffa3412dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.595909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0245a28d82 [ 63.596953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0244e62000 [ 63.597994] RBP: 00007f0244e62000 R08: 0000000000000009 R09: 0000000000001000 [ 63.599053] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6a5a2cd90 [ 63.600127] R13: 00007fffa3412df0 R14: 00007fffa3412e20 R15: 00007fffa3413180 [ 63.601205] [ 63.601566] [ 63.601826] Allocated by task 219: [ 63.602351] kasan_save_stack+0x22/0x50 [ 63.602971] kasan_set_track+0x25/0x30 [ 63.603580] __kasan_slab_alloc+0x59/0x70 [ 63.604224] kmem_cache_alloc+0x16b/0x370 [ 63.604863] vm_area_dup+0x20/0x160 [ 63.605414] __split_vma+0x170/0x950 [ 63.605976] split_vma+0xc6/0x110 [ 63.606511] mprotect_fixup+0x8d2/0xb30 [ 63.607121] do_mprotect_pkey+0x87e/0xd40 [ 63.607790] __x64_sys_mprotect+0x78/0xc0 [ 63.608427] do_syscall_64+0x3f/0x90 [ 63.609013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.609671] [ 63.609877] Freed by task 219: [ 63.610251] kasan_save_stack+0x22/0x50 [ 63.610729] kasan_set_track+0x25/0x30 [ 63.611205] kasan_save_free_info+0x2b/0x50 [ 63.611709] __kasan_slab_free+0x10a/0x190 [ 63.612212] kmem_cache_free+0x10d/0x4d0 [ 63.612694] rcu_core+0x8c8/0x2860 [ 63.613118] __do_softirq+0x1b7/0x7d4 [ 63.613567] [ 63.613775] Last potentially related work creation: [ 63.614327] kasan_save_stack+0x22/0x50 [ 63.614803] __kasan_record_aux_stack+0x8e/0xa0 [ 63.615372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.615985] remove_vma+0x139/0x170 [ 63.616414] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.616943] do_vmi_munmap+0x1f1/0x2b0 [ 63.617404] __vm_munmap+0x138/0x3a0 [ 63.617859] __x64_sys_munmap+0x59/0x80 [ 63.618329] do_syscall_64+0x3f/0x90 [ 63.618783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.619428] [ 63.619636] The buggy address belongs to the object at ffff88801a186e80 [ 63.619636] which belongs to the cache vm_area_struct of size 168 [ 63.621071] The buggy address is located 88 bytes inside of [ 63.621071] freed 168-byte region [ffff88801a186e80, ffff88801a186f28) [ 63.622605] [ 63.622848] The buggy address belongs to the physical page: [ 63.623585] page:0000000095655914 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a186 [ 63.624786] memcg:ffff888016fc2a01 [ 63.625250] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.625953] page_type: 0xffffffff() [ 63.626445] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.627481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fc2a01 [ 63.628469] page dumped because: kasan: bad access detected [ 63.629309] [ 63.629555] Memory state around the buggy address: [ 63.630187] ffff88801a186d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.631110] ffff88801a186e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 63.632064] >ffff88801a186e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.632994] ^ [ 63.633793] ffff88801a186f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 63.634734] ffff88801a186f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 63.635700] ================================================================== [ 63.636822] Disabling lock debugging due to kernel taint [ 65.630005] BUG: Bad rss-counter state mm:000000001dfcbc8e type:MM_FILEPAGES val:33 [ 65.630706] BUG: Bad rss-counter state mm:000000001dfcbc8e type:MM_ANONPAGES val:22 [ 66.101824] BUG: Bad rss-counter state mm:000000007c221347 type:MM_FILEPAGES val:33 [ 66.102903] BUG: Bad rss-counter state mm:000000007c221347 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13144' (ECDSA) to the list of known hosts. 2023/06/19 11:04:20 fuzzer started 2023/06/19 11:04:20 dialing manager at localhost:44161 2023/06/19 11:04:20 checking machine... 2023/06/19 11:04:20 checking revisions... [ 66.882916] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:04:21 testing simple program... [ 66.933822] cgroup: Unknown subsys name 'net' [ 66.993334] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00005578f2e31b90 RCX=000000000000006d RDX=00007eff79ad64c0 RSI=00007eff7954cc1e RDI=00007eff7954cc34 RBP=00005578f2e56180 RSP=00007ffcb927b390 R8 =00005578f2e40630 R9 =00007eff79b23be0 R10=0000000001000000 R11=0000000000000003 R12=0000000000000604 R13=0000000000000012 R14=00007eff7954f7f8 R15=00007eff7954cc34 RIP=00007eff79547075 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007eff79571900 00000000 00000000 GS =0000 0000000000000000 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=00007eff79b26650 CR3=000000000e724000 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=ffffffffffffffffffff000000000000 XMM01=01010101010100010101000000000000 XMM02=616c65646f6e0067756265640035646d XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ffffffffffff00ffffffffff0000ffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=000000000000f69f RCX=0000000000000000 RDX=ffff8880147f8000 RSI=ffffffff813cb4a2 RDI=ffffffff85d3bed0 RBP=ffff88806cf2b988 RSP=ffff88806cf09ed8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806cf09ff8 R12=0000000000000046 R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=ffff88806cf2b940 RIP=ffffffff813cb4b1 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 00007fe6a48ce900 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=00007fe6a3cfa900 CR3=000000000c642000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7a42e71756e44d0e00000000000ae988 XMM05=516d8d5ded2212e10000000000135450 XMM06=6860aeb314f8829d0000000000133f78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000