syzkaller login: [ 31.385197] BUG: Bad rss-counter state mm:00000000e5a75bd2 type:MM_FILEPAGES val:33 [ 31.386892] BUG: Bad rss-counter state mm:00000000e5a75bd2 type:MM_ANONPAGES val:22 [ 31.541021] ================================================================== [ 31.541879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.542760] Read of size 8 at addr ffff888016b435c8 by task sshd/219 [ 31.543487] [ 31.543805] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.544633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.545545] Call Trace: [ 31.545866] [ 31.546136] dump_stack_lvl+0x91/0xf0 [ 31.546597] print_report+0xcc/0x620 [ 31.547055] ? __virt_addr_valid+0x102/0x340 [ 31.547584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.548199] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.548783] kasan_report+0xbe/0xf0 [ 31.549237] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.549826] vma_interval_tree_remove+0xc75/0xec0 [ 31.550395] vma_prepare+0xc54/0x11a0 [ 31.550849] __split_vma+0x5af/0x950 [ 31.551298] ? __pfx___split_vma+0x10/0x10 [ 31.551805] ? find_held_lock+0x2c/0x110 [ 31.552310] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.552863] ? lock_is_held_type+0x9f/0x120 [ 31.553395] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.553994] ? mtree_range_walk+0x632/0x900 [ 31.554537] ? mas_walk+0x5c7/0x7c0 [ 31.555013] do_vmi_munmap+0x1f1/0x2b0 [ 31.555490] mmap_region+0x1f9/0x2660 [ 31.555969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.556476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.557181] ? __pfx_lock_acquire+0x10/0x10 [ 31.557706] ? __pfx_mmap_region+0x10/0x10 [ 31.558226] ? security_mmap_addr+0x7d/0xa0 [ 31.558749] ? get_unmapped_area+0x1f5/0x3f0 [ 31.559301] do_mmap+0x854/0xf00 [ 31.559727] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.560233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.560787] ksys_mmap_pgoff+0x3af/0x500 [ 31.561286] do_syscall_64+0x3f/0x90 [ 31.561761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.562401] RIP: 0033:0x7f699c9ecd82 [ 31.562860] 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 [ 31.564959] RSP: 002b:00007ffe57ee3a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.565860] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f699c9ecd82 [ 31.566698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f699be26000 [ 31.567537] RBP: 00007f699be26000 R08: 0000000000000009 R09: 0000000000001000 [ 31.568377] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fdc23aec0 [ 31.569211] R13: 00007ffe57ee3a20 R14: 00007ffe57ee3a50 R15: 00007ffe57ee3db0 [ 31.570058] [ 31.570342] [ 31.570552] Allocated by task 212: [ 31.570964] kasan_save_stack+0x22/0x50 [ 31.571461] kasan_set_track+0x25/0x30 [ 31.571939] __kasan_slab_alloc+0x59/0x70 [ 31.572468] kmem_cache_alloc+0x16b/0x370 [ 31.572984] vm_area_dup+0x20/0x160 [ 31.573435] __split_vma+0x170/0x950 [ 31.573898] split_vma+0xc6/0x110 [ 31.574343] mprotect_fixup+0x8d2/0xb30 [ 31.574848] do_mprotect_pkey+0x87e/0xd40 [ 31.575367] __x64_sys_mprotect+0x78/0xc0 [ 31.575880] do_syscall_64+0x3f/0x90 [ 31.576349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.576977] [ 31.577190] Freed by task 212: [ 31.577581] kasan_save_stack+0x22/0x50 [ 31.578083] kasan_set_track+0x25/0x30 [ 31.578565] kasan_save_free_info+0x2b/0x50 [ 31.579097] __kasan_slab_free+0x10a/0x190 [ 31.579628] kmem_cache_free+0x10d/0x4d0 [ 31.580157] rcu_core+0x8c8/0x2860 [ 31.580598] __do_softirq+0x1b7/0x7d4 [ 31.581064] [ 31.581274] Last potentially related work creation: [ 31.581850] kasan_save_stack+0x22/0x50 [ 31.582349] __kasan_record_aux_stack+0x8e/0xa0 [ 31.582913] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.583558] remove_vma+0x139/0x170 [ 31.584002] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.584604] do_vmi_munmap+0x1f1/0x2b0 [ 31.585088] __vm_munmap+0x138/0x3a0 [ 31.585548] __x64_sys_munmap+0x59/0x80 [ 31.586034] do_syscall_64+0x3f/0x90 [ 31.586498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.587126] [ 31.587337] The buggy address belongs to the object at ffff888016b43570 [ 31.587337] which belongs to the cache vm_area_struct of size 168 [ 31.588808] The buggy address is located 88 bytes inside of [ 31.588808] freed 168-byte region [ffff888016b43570, ffff888016b43618) [ 31.590206] [ 31.590421] The buggy address belongs to the physical page: [ 31.591071] page:0000000070ed5dde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b43 [ 31.592173] memcg:ffff888016c35401 [ 31.592589] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.593280] page_type: 0xffffffff() [ 31.593731] raw: 0100000000000200 ffff88800879fc80 ffffea0000382f80 dead000000000007 [ 31.594638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c35401 [ 31.595537] page dumped because: kasan: bad access detected [ 31.596202] [ 31.596413] Memory state around the buggy address: [ 31.596987] ffff888016b43480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.597846] ffff888016b43500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.598702] >ffff888016b43580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.599555] ^ [ 31.600221] ffff888016b43600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.601060] ffff888016b43680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.601892] ================================================================== [ 31.602812] Disabling lock debugging due to kernel taint [ 33.549100] BUG: Bad rss-counter state mm:000000005a2b2107 type:MM_FILEPAGES val:33 [ 33.550122] BUG: Bad rss-counter state mm:000000005a2b2107 type:MM_ANONPAGES val:22 [ 34.016396] BUG: Bad rss-counter state mm:00000000ba682a6a type:MM_FILEPAGES val:33 [ 34.017478] BUG: Bad rss-counter state mm:00000000ba682a6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60128' (ECDSA) to the list of known hosts. 2023/06/19 21:04:35 fuzzer started 2023/06/19 21:04:35 dialing manager at localhost:44161 2023/06/19 21:04:35 checking machine... 2023/06/19 21:04:35 checking revisions... [ 34.728412] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:04:35 testing simple program... [ 34.781342] cgroup: Unknown subsys name 'net' [ 34.851229] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:04:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81807f5b RDI=ffff88806ce09b6c RBP=000000000000000f RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801818b680 R15=ffff88801a2deb30 RIP=ffffffff813ad49e RFL=00000213 [----A-C] 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 00007f4d9820b900 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=00007ffc70145000 CR3=000000000e5a2000 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=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7311d8ab20 CR3=000000000d160000 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=abb16c920bc89e8d1e41e4cb40181ec4 XMM02=ec2efd57dc4c00df000000000011d0e0 XMM03=3b2debbe2b9c4132000000000011d1b0 XMM04=04f31308b2ef828800000000000ae988 XMM05=dfcdbad4f1609c370000000000133328 XMM06=932bfc5433e34b400000000000132500 XMM07=e042d86d42eb936e0000000000123d70 XMM08=3b2debbe2b9c4132000000000011d1b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000