syzkaller login: [ 30.472680] BUG: Bad rss-counter state mm:00000000c4c49e1a type:MM_FILEPAGES val:33 [ 30.474351] BUG: Bad rss-counter state mm:00000000c4c49e1a type:MM_ANONPAGES val:22 [ 30.645678] ================================================================== [ 30.646582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.647520] Read of size 8 at addr ffff88800def0058 by task sshd/221 [ 30.648370] [ 30.648744] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.649742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.650723] Call Trace: [ 30.651045] [ 30.651340] dump_stack_lvl+0x91/0xf0 [ 30.651829] print_report+0xcc/0x620 [ 30.652360] ? __virt_addr_valid+0x102/0x340 [ 30.652914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.653538] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.654147] kasan_report+0xbe/0xf0 [ 30.654630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655248] vma_interval_tree_remove+0xc75/0xec0 [ 30.655856] vma_prepare+0xc54/0x11a0 [ 30.656416] __split_vma+0x5af/0x950 [ 30.656891] ? __pfx___split_vma+0x10/0x10 [ 30.657482] ? find_held_lock+0x2c/0x110 [ 30.658005] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.658638] ? lock_is_held_type+0x9f/0x120 [ 30.659223] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.659866] ? mtree_range_walk+0x632/0x900 [ 30.660509] ? mas_walk+0x5c7/0x7c0 [ 30.660989] do_vmi_munmap+0x1f1/0x2b0 [ 30.661544] mmap_region+0x1f9/0x2660 [ 30.662043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.662604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.663386] ? __pfx_lock_acquire+0x10/0x10 [ 30.663945] ? __pfx_mmap_region+0x10/0x10 [ 30.664536] ? security_mmap_addr+0x7d/0xa0 [ 30.665128] ? get_unmapped_area+0x1f5/0x3f0 [ 30.665739] do_mmap+0x854/0xf00 [ 30.666232] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.666766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.667417] ksys_mmap_pgoff+0x3af/0x500 [ 30.667957] do_syscall_64+0x3f/0x90 [ 30.668510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.669191] RIP: 0033:0x7feb1f1e8d82 [ 30.669678] 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 [ 30.671973] RSP: 002b:00007ffeda70e918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.672948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb1f1e8d82 [ 30.673852] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb1e622000 [ 30.674753] RBP: 00007feb1e622000 R08: 0000000000000009 R09: 0000000000001000 [ 30.675659] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b65bd2b20 [ 30.676594] R13: 00007ffeda70e930 R14: 00007ffeda70e960 R15: 00007ffeda70ecc0 [ 30.677515] [ 30.677813] [ 30.678042] Allocated by task 214: [ 30.678512] kasan_save_stack+0x22/0x50 [ 30.679023] kasan_set_track+0x25/0x30 [ 30.679586] __kasan_slab_alloc+0x59/0x70 [ 30.680156] kmem_cache_alloc+0x16b/0x370 [ 30.680714] vm_area_dup+0x20/0x160 [ 30.681207] __split_vma+0x170/0x950 [ 30.681704] split_vma+0xc6/0x110 [ 30.682180] mprotect_fixup+0x8d2/0xb30 [ 30.682709] do_mprotect_pkey+0x87e/0xd40 [ 30.683302] __x64_sys_mprotect+0x78/0xc0 [ 30.683832] do_syscall_64+0x3f/0x90 [ 30.684392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685063] [ 30.685317] Freed by task 214: [ 30.685717] kasan_save_stack+0x22/0x50 [ 30.686245] kasan_set_track+0x25/0x30 [ 30.686776] kasan_save_free_info+0x2b/0x50 [ 30.687380] __kasan_slab_free+0x10a/0x190 [ 30.687920] kmem_cache_free+0x10d/0x4d0 [ 30.688491] rcu_core+0x8c8/0x2860 [ 30.688943] __do_softirq+0x1b7/0x7d4 [ 30.689516] [ 30.689792] Last potentially related work creation: [ 30.690530] kasan_save_stack+0x22/0x50 [ 30.691039] __kasan_record_aux_stack+0x8e/0xa0 [ 30.691629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692317] remove_vma+0x139/0x170 [ 30.692780] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693352] do_vmi_munmap+0x1f1/0x2b0 [ 30.693848] __vm_munmap+0x138/0x3a0 [ 30.694329] __x64_sys_munmap+0x59/0x80 [ 30.694830] do_syscall_64+0x3f/0x90 [ 30.695321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695983] [ 30.696202] Second to last potentially related work creation: [ 30.696909] kasan_save_stack+0x22/0x50 [ 30.697447] __kasan_record_aux_stack+0x8e/0xa0 [ 30.698044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.698705] remove_vma+0x139/0x170 [ 30.699171] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.699773] do_vmi_munmap+0x1f1/0x2b0 [ 30.700348] mmap_region+0x1f9/0x2660 [ 30.700836] do_mmap+0x854/0xf00 [ 30.701280] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.701785] ksys_mmap_pgoff+0x3af/0x500 [ 30.702302] do_syscall_64+0x3f/0x90 [ 30.702784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703444] [ 30.703659] The buggy address belongs to the object at ffff88800def0000 [ 30.703659] which belongs to the cache vm_area_struct of size 168 [ 30.705198] The buggy address is located 88 bytes inside of [ 30.705198] freed 168-byte region [ffff88800def0000, ffff88800def00a8) [ 30.706648] [ 30.706864] The buggy address belongs to the physical page: [ 30.707551] page:0000000027ca4189 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef0 [ 30.708675] memcg:ffff88800deff701 [ 30.709117] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.709840] page_type: 0xffffffff() [ 30.710298] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d14c0 dead000000000003 [ 30.711247] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deff701 [ 30.712201] page dumped because: kasan: bad access detected [ 30.712901] [ 30.713117] Memory state around the buggy address: [ 30.713721] ffff88800deeff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.714590] ffff88800deeff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.715471] >ffff88800def0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.716378] ^ [ 30.717114] ffff88800def0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.717983] ffff88800def0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.718846] ================================================================== [ 30.719818] Disabling lock debugging due to kernel taint [ 32.740332] BUG: Bad rss-counter state mm:00000000ad46b558 type:MM_FILEPAGES val:33 [ 32.741421] BUG: Bad rss-counter state mm:00000000ad46b558 type:MM_ANONPAGES val:22 [ 33.224303] BUG: Bad rss-counter state mm:00000000b3fb1992 type:MM_FILEPAGES val:33 [ 33.225545] BUG: Bad rss-counter state mm:00000000b3fb1992 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2767' (ECDSA) to the list of known hosts. 2023/06/20 20:00:39 fuzzer started 2023/06/20 20:00:39 dialing manager at localhost:36067 2023/06/20 20:00:39 checking machine... 2023/06/20 20:00:39 checking revisions... [ 33.947695] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:00:39 testing simple program... [ 33.996942] cgroup: Unknown subsys name 'net' [ 34.081781] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:39 Registers: info registers vcpu 0 RAX=000000000000c86c RBX=ffff88806ce35000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84536713 RSP=ffff8880147dfc58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800e84d0d0 R13=ffff88800e84d0d0 R14=dffffc0000000000 R15=ffff88800e84d0d0 RIP=ffffffff8135b973 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 00007f17518aa900 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=00007f1750dc9000 CR3=000000000d768000 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=5cc0493b8b145a860e464ca4d80d84dc XMM02=ec2efd57dc4c00df000000000011d1f0 XMM03=34f291a6862ddf21000000000011d2c0 XMM04=d8ed0bf7b6c2c8dc00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132af8 XMM06=6af449ac7db96e020000000000131960 XMM07=e042d86d42eb936e0000000000121c48 XMM08=34f291a6862ddf21000000000011d2c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c908001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800c907701 RSI=ffff88800c907700 RDI=ffff88800c907268 RBP=ffff88800c907700 RSP=ffff88800c9071c0 R8 =0000000000000001 R9 =ffff88800c907298 R10=0000000000038001 R11=000000000001cff6 R12=0000000000000008 R13=ffff88800c900000 R14=ffff88800c907700 R15=ffff88800c907258 RIP=ffffffff811304ce 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 00007f602900a900 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=00007ffe21ad1000 CR3=000000000ef2e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000