syzkaller login: [ 39.740703] BUG: Bad rss-counter state mm:000000007109ec88 type:MM_FILEPAGES val:33 [ 39.742508] BUG: Bad rss-counter state mm:000000007109ec88 type:MM_ANONPAGES val:22 [ 40.026904] ================================================================== [ 40.027527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.028122] Read of size 8 at addr ffff88800dcab3f8 by task sshd/223 [ 40.032656] [ 40.032808] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.033375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.033998] Call Trace: [ 40.034212] [ 40.034403] dump_stack_lvl+0x91/0xf0 [ 40.034733] print_report+0xcc/0x620 [ 40.035054] ? __virt_addr_valid+0x102/0x340 [ 40.035420] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.035823] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.036226] kasan_report+0xbe/0xf0 [ 40.040645] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.041045] vma_interval_tree_remove+0xc75/0xec0 [ 40.041436] vma_prepare+0xc54/0x11a0 [ 40.041754] __split_vma+0x5af/0x950 [ 40.042059] ? __pfx___split_vma+0x10/0x10 [ 40.042406] ? find_held_lock+0x2c/0x110 [ 40.042749] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.043120] ? lock_is_held_type+0x9f/0x120 [ 40.043475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.043873] ? mtree_range_walk+0x632/0x900 [ 40.044237] ? mas_walk+0x5c7/0x7c0 [ 40.044582] do_vmi_munmap+0x1f1/0x2b0 [ 40.044908] mmap_region+0x1f9/0x2660 [ 40.045222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.045551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.046015] ? __pfx_lock_acquire+0x10/0x10 [ 40.046363] ? __pfx_mmap_region+0x10/0x10 [ 40.046709] ? security_mmap_addr+0x7d/0xa0 [ 40.047057] ? get_unmapped_area+0x1f5/0x3f0 [ 40.047418] do_mmap+0x854/0xf00 [ 40.047709] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.048036] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.048436] ksys_mmap_pgoff+0x3af/0x500 [ 40.048770] do_syscall_64+0x3f/0x90 [ 40.049085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.049506] RIP: 0033:0x7f9cb3c0fd82 [ 40.049798] 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 [ 40.051152] RSP: 002b:00007ffdecb4b798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.051737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cb3c0fd82 [ 40.052307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cb3049000 [ 40.052861] RBP: 00007f9cb3049000 R08: 0000000000000009 R09: 0000000000001000 [ 40.053411] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca2749cf70 [ 40.053952] R13: 00007ffdecb4b7b0 R14: 00007ffdecb4b7e0 R15: 00007ffdecb4bb40 [ 40.054501] [ 40.054695] [ 40.054838] Allocated by task 214: [ 40.055115] kasan_save_stack+0x22/0x50 [ 40.055445] kasan_set_track+0x25/0x30 [ 40.055769] __kasan_slab_alloc+0x59/0x70 [ 40.056113] kmem_cache_alloc+0x16b/0x370 [ 40.056494] vm_area_dup+0x20/0x160 [ 40.056794] __split_vma+0x170/0x950 [ 40.057109] split_vma+0xc6/0x110 [ 40.057399] mprotect_fixup+0x8d2/0xb30 [ 40.057728] do_mprotect_pkey+0x87e/0xd40 [ 40.058069] __x64_sys_mprotect+0x78/0xc0 [ 40.058401] do_syscall_64+0x3f/0x90 [ 40.058705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.059125] [ 40.059267] Freed by task 214: [ 40.059520] kasan_save_stack+0x22/0x50 [ 40.059850] kasan_set_track+0x25/0x30 [ 40.060172] kasan_save_free_info+0x2b/0x50 [ 40.060646] __kasan_slab_free+0x10a/0x190 [ 40.060997] kmem_cache_free+0x10d/0x4d0 [ 40.061328] rcu_core+0x8c8/0x2860 [ 40.061623] __do_softirq+0x1b7/0x7d4 [ 40.061941] [ 40.062085] Last potentially related work creation: [ 40.062465] kasan_save_stack+0x22/0x50 [ 40.062788] __kasan_record_aux_stack+0x8e/0xa0 [ 40.063157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.063578] remove_vma+0x139/0x170 [ 40.063871] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.064235] do_vmi_munmap+0x1f1/0x2b0 [ 40.064590] __vm_munmap+0x138/0x3a0 [ 40.064905] __x64_sys_munmap+0x59/0x80 [ 40.065231] do_syscall_64+0x3f/0x90 [ 40.065541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.065959] [ 40.066101] The buggy address belongs to the object at ffff88800dcab3a0 [ 40.066101] which belongs to the cache vm_area_struct of size 168 [ 40.067039] The buggy address is located 88 bytes inside of [ 40.067039] freed 168-byte region [ffff88800dcab3a0, ffff88800dcab448) [ 40.067937] [ 40.068079] The buggy address belongs to the physical page: [ 40.068527] page:00000000e2c90548 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcab [ 40.069228] memcg:ffff88800d5fbb01 [ 40.069508] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.069962] page_type: 0xffffffff() [ 40.070260] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6940 dead000000000003 [ 40.070857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5fbb01 [ 40.071436] page dumped because: kasan: bad access detected [ 40.071858] [ 40.072001] Memory state around the buggy address: [ 40.076421] ffff88800dcab280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.076971] ffff88800dcab300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.077524] >ffff88800dcab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.078076] ^ [ 40.078623] ffff88800dcab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.079178] ffff88800dcab480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.079731] ================================================================== [ 40.080424] Disabling lock debugging due to kernel taint [ 48.183320] BUG: Bad rss-counter state mm:00000000b55fb622 type:MM_FILEPAGES val:33 [ 48.184038] BUG: Bad rss-counter state mm:00000000b55fb622 type:MM_ANONPAGES val:22 [ 49.476912] BUG: Bad rss-counter state mm:0000000016bd9560 type:MM_FILEPAGES val:33 [ 49.478162] BUG: Bad rss-counter state mm:0000000016bd9560 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55226' (ECDSA) to the list of known hosts. 2023/06/20 10:01:52 fuzzer started 2023/06/20 10:01:53 dialing manager at localhost:44161 2023/06/20 10:01:53 checking machine... 2023/06/20 10:01:53 checking revisions... [ 50.418677] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:01:53 testing simple program... [ 50.481966] cgroup: Unknown subsys name 'net' [ 50.565325] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e9fea50 RCX=ffffffff81861e9f RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=1ffff11002b34f46 RSP=ffff8880159a7a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800e9fea00 R13=ffff8880159a7cb0 R14=00000000494a801d R15=0000000000000000 RIP=ffffffff814c01d0 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 00007f41c6938900 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=00007f41c6d68790 CR3=0000000013ea6000 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=0000000000000000fffffffe7ffbfeff XMM01=00000000000000020000000000000000 XMM02=00000000000000008000000000000006 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000020e1c99970 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000020 RSI=ffff88806cf28140 RDI=000000000002b388 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=000000000007bb86 R11=ffff88806cf09ff8 R12=000000000002b388 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 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=00007f447f786898 CR3=0000000013eae000 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=0063e957d8753685ed4386d6c7147a8a XMM02=000000000011cf90ec2efd57dc4c00df XMM03=0000000000123d385585beec852844d8 XMM04=0958beaa0ffdf5d300000000000ae988 XMM05=4b0d52704a4ae2b10000000000135700 XMM06=5a9d233068761c4a0000000000134a68 XMM07=139997807ff5a4420000000000125760 XMM08=e042d86d42eb936e0000000000124010 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000