syzkaller login: [ 38.689397] BUG: Bad rss-counter state mm:00000000e7283a4a type:MM_FILEPAGES val:33 [ 38.689973] BUG: Bad rss-counter state mm:00000000e7283a4a type:MM_ANONPAGES val:22 [ 38.797986] ================================================================== [ 38.798688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.799446] Read of size 8 at addr ffff88800d8f93f8 by task sshd/218 [ 38.800029] [ 38.800195] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.800866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.801619] Call Trace: [ 38.801993] [ 38.802213] dump_stack_lvl+0x91/0xf0 [ 38.802599] print_report+0xcc/0x620 [ 38.802987] ? __virt_addr_valid+0x102/0x340 [ 38.803412] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.803893] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.804374] kasan_report+0xbe/0xf0 [ 38.804742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.805219] vma_interval_tree_remove+0xc75/0xec0 [ 38.805686] vma_prepare+0xc54/0x11a0 [ 38.806055] __split_vma+0x5af/0x950 [ 38.806415] ? __pfx___split_vma+0x10/0x10 [ 38.806843] ? find_held_lock+0x2c/0x110 [ 38.807203] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.807537] ? lock_is_held_type+0x9f/0x120 [ 38.807854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.808214] ? mtree_range_walk+0x632/0x900 [ 38.808545] ? mas_walk+0x5c7/0x7c0 [ 38.808823] do_vmi_munmap+0x1f1/0x2b0 [ 38.809114] mmap_region+0x1f9/0x2660 [ 38.809398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.809699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.810121] ? __pfx_lock_acquire+0x10/0x10 [ 38.810438] ? __pfx_mmap_region+0x10/0x10 [ 38.810775] ? security_mmap_addr+0x7d/0xa0 [ 38.811090] ? get_unmapped_area+0x1f5/0x3f0 [ 38.811416] do_mmap+0x854/0xf00 [ 38.811678] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.811966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.812298] ksys_mmap_pgoff+0x3af/0x500 [ 38.812598] do_syscall_64+0x3f/0x90 [ 38.812881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.813267] RIP: 0033:0x7fcb292c2d82 [ 38.813539] 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 [ 38.814834] RSP: 002b:00007ffe53aa1728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.815374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb292c2d82 [ 38.815874] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb286fc000 [ 38.816379] RBP: 00007fcb286fc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.816882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1c30fcec0 [ 38.817387] R13: 00007ffe53aa1740 R14: 00007ffe53aa1770 R15: 00007ffe53aa1ad0 [ 38.817900] [ 38.818070] [ 38.818197] Allocated by task 211: [ 38.818460] kasan_save_stack+0x22/0x50 [ 38.818772] kasan_set_track+0x25/0x30 [ 38.819060] __kasan_slab_alloc+0x59/0x70 [ 38.819370] kmem_cache_alloc+0x16b/0x370 [ 38.819676] vm_area_dup+0x20/0x160 [ 38.819948] __split_vma+0x170/0x950 [ 38.820228] split_vma+0xc6/0x110 [ 38.820487] mprotect_fixup+0x8d2/0xb30 [ 38.820780] do_mprotect_pkey+0x87e/0xd40 [ 38.821084] __x64_sys_mprotect+0x78/0xc0 [ 38.821389] do_syscall_64+0x3f/0x90 [ 38.821668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.822049] [ 38.822178] Freed by task 211: [ 38.822410] kasan_save_stack+0x22/0x50 [ 38.822715] kasan_set_track+0x25/0x30 [ 38.823009] kasan_save_free_info+0x2b/0x50 [ 38.823332] __kasan_slab_free+0x10a/0x190 [ 38.823646] kmem_cache_free+0x10d/0x4d0 [ 38.823945] rcu_core+0x8c8/0x2860 [ 38.824210] __do_softirq+0x1b7/0x7d4 [ 38.824492] [ 38.824618] Last potentially related work creation: [ 38.824964] kasan_save_stack+0x22/0x50 [ 38.825262] __kasan_record_aux_stack+0x8e/0xa0 [ 38.825601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.825980] remove_vma+0x139/0x170 [ 38.826248] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.826576] do_vmi_munmap+0x1f1/0x2b0 [ 38.826873] __vm_munmap+0x138/0x3a0 [ 38.827146] __x64_sys_munmap+0x59/0x80 [ 38.827441] do_syscall_64+0x3f/0x90 [ 38.827719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.828097] [ 38.828223] Second to last potentially related work creation: [ 38.828628] kasan_save_stack+0x22/0x50 [ 38.828927] __kasan_record_aux_stack+0x8e/0xa0 [ 38.829282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.829658] remove_vma+0x139/0x170 [ 38.829928] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.830264] do_vmi_munmap+0x1f1/0x2b0 [ 38.830547] mmap_region+0x1f9/0x2660 [ 38.830836] do_mmap+0x854/0xf00 [ 38.831087] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.831374] ksys_mmap_pgoff+0x3af/0x500 [ 38.831669] do_syscall_64+0x3f/0x90 [ 38.831950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.832327] [ 38.832452] The buggy address belongs to the object at ffff88800d8f93a0 [ 38.832452] which belongs to the cache vm_area_struct of size 168 [ 38.833379] The buggy address is located 88 bytes inside of [ 38.833379] freed 168-byte region [ffff88800d8f93a0, ffff88800d8f9448) [ 38.834165] [ 38.834287] The buggy address belongs to the physical page: [ 38.834655] page:0000000022afafda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8f9 [ 38.835274] memcg:ffff88800c62dd01 [ 38.835513] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.835871] page_type: 0xffffffff() [ 38.836124] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f9640 dead000000000008 [ 38.836638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c62dd01 [ 38.837149] page dumped because: kasan: bad access detected [ 38.837521] [ 38.837642] Memory state around the buggy address: [ 38.837966] ffff88800d8f9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.838452] ffff88800d8f9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.838941] >ffff88800d8f9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.839422] ^ [ 38.839897] ffff88800d8f9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.840375] ffff88800d8f9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.840852] ================================================================== [ 38.841375] Disabling lock debugging due to kernel taint [ 41.188159] BUG: Bad rss-counter state mm:0000000055f9e176 type:MM_FILEPAGES val:33 [ 41.189897] BUG: Bad rss-counter state mm:0000000055f9e176 type:MM_ANONPAGES val:22 [ 41.688151] BUG: Bad rss-counter state mm:00000000497288ca type:MM_FILEPAGES val:33 [ 41.689234] BUG: Bad rss-counter state mm:00000000497288ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25033' (ECDSA) to the list of known hosts. 2023/06/20 17:58:44 fuzzer started 2023/06/20 17:58:44 dialing manager at localhost:36067 2023/06/20 17:58:44 checking machine... 2023/06/20 17:58:44 checking revisions... [ 42.435968] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:58:44 testing simple program... [ 42.490639] cgroup: Unknown subsys name 'net' [ 42.578691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:58:44 Registers: info registers vcpu 0 RAX=ffff8880164e8001 RBX=ffff8880164e77e8 RCX=0000000000000001 RDX=ffff8880164e7c01 RSI=ffff8880164e7c78 RDI=ffff8880164e77f8 RBP=ffff8880164e7c78 RSP=ffff8880164e7740 R8 =0000000000000001 R9 =ffff8880164e7828 R10=0000000000038001 R11=0000000000020d03 R12=0000000000000008 R13=ffff8880164e0000 R14=ffff8880164e7c78 R15=ffff8880164e77e8 RIP=ffffffff8113048d RFL=00000283 [--S---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 00007f04ed626900 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=00007ffdd60a0000 CR3=000000000ecfc000 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=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 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=ffff888008c04400 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=00007f6856cf5490 CR3=000000000c59e000 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=8af615e791580d8d24441a93c007c77b XMM02=ec2efd57dc4c00df000000000011a6e0 XMM03=b2e0213c89e0bc1d000000000011a7b0 XMM04=9c873f59b0a3b0a400000000000ae988 XMM05=687f1b4a02b2cd280000000000133830 XMM06=806171799158d9670000000000132308 XMM07=e042d86d42eb936e0000000000121740 XMM08=b2e0213c89e0bc1d000000000011a7b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000