syzkaller login: [ 35.111443] BUG: Bad rss-counter state mm:00000000046156a3 type:MM_FILEPAGES val:33 [ 35.112782] BUG: Bad rss-counter state mm:00000000046156a3 type:MM_ANONPAGES val:22 [ 35.258322] ================================================================== [ 35.259076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.259884] Read of size 8 at addr ffff888019491880 by task sshd/220 [ 35.260537] [ 35.260720] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.261455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.262371] Call Trace: [ 35.262643] [ 35.262879] dump_stack_lvl+0x91/0xf0 [ 35.263301] print_report+0xcc/0x620 [ 35.263725] ? __virt_addr_valid+0x102/0x340 [ 35.264215] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.264750] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.265272] kasan_report+0xbe/0xf0 [ 35.265667] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.266188] vma_interval_tree_remove+0xc75/0xec0 [ 35.266698] vma_prepare+0xc54/0x11a0 [ 35.267101] __split_vma+0x5af/0x950 [ 35.267506] ? __pfx___split_vma+0x10/0x10 [ 35.267951] ? find_held_lock+0x2c/0x110 [ 35.268388] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.268858] ? lock_is_held_type+0x9f/0x120 [ 35.269309] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.269829] ? mtree_range_walk+0x632/0x900 [ 35.270299] ? mas_walk+0x5c7/0x7c0 [ 35.270696] do_vmi_munmap+0x1f1/0x2b0 [ 35.271107] mmap_region+0x1f9/0x2660 [ 35.271532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.271968] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.272580] ? __pfx_lock_acquire+0x10/0x10 [ 35.273016] ? __pfx_mmap_region+0x10/0x10 [ 35.273460] ? security_mmap_addr+0x7d/0xa0 [ 35.273907] ? get_unmapped_area+0x1f5/0x3f0 [ 35.274359] do_mmap+0x854/0xf00 [ 35.274721] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.275137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.275622] ksys_mmap_pgoff+0x3af/0x500 [ 35.276059] do_syscall_64+0x3f/0x90 [ 35.276462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.277001] RIP: 0033:0x7fce7321ad82 [ 35.277379] 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 [ 35.279180] RSP: 002b:00007fffd0c11d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.279976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce7321ad82 [ 35.280694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce72654000 [ 35.281409] RBP: 00007fce72654000 R08: 0000000000000009 R09: 0000000000001000 [ 35.282124] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fee8653d90 [ 35.282844] R13: 00007fffd0c11d80 R14: 00007fffd0c11db0 R15: 00007fffd0c12110 [ 35.283577] [ 35.283824] [ 35.284003] Allocated by task 213: [ 35.284359] kasan_save_stack+0x22/0x50 [ 35.284786] kasan_set_track+0x25/0x30 [ 35.285199] __kasan_slab_alloc+0x59/0x70 [ 35.285638] kmem_cache_alloc+0x16b/0x370 [ 35.286065] vm_area_dup+0x20/0x160 [ 35.286442] __split_vma+0x170/0x950 [ 35.286839] split_vma+0xc6/0x110 [ 35.287208] mprotect_fixup+0x8d2/0xb30 [ 35.287622] do_mprotect_pkey+0x87e/0xd40 [ 35.288052] __x64_sys_mprotect+0x78/0xc0 [ 35.288482] do_syscall_64+0x3f/0x90 [ 35.288881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.289413] [ 35.289588] Freed by task 213: [ 35.289911] kasan_save_stack+0x22/0x50 [ 35.290332] kasan_set_track+0x25/0x30 [ 35.290744] kasan_save_free_info+0x2b/0x50 [ 35.291185] __kasan_slab_free+0x10a/0x190 [ 35.291636] kmem_cache_free+0x10d/0x4d0 [ 35.292065] rcu_core+0x8c8/0x2860 [ 35.292433] __do_softirq+0x1b7/0x7d4 [ 35.292831] [ 35.293012] Last potentially related work creation: [ 35.293503] kasan_save_stack+0x22/0x50 [ 35.293920] __kasan_record_aux_stack+0x8e/0xa0 [ 35.294398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.294930] remove_vma+0x139/0x170 [ 35.295299] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.295768] do_vmi_munmap+0x1f1/0x2b0 [ 35.296165] __vm_munmap+0x138/0x3a0 [ 35.296558] __x64_sys_munmap+0x59/0x80 [ 35.296965] do_syscall_64+0x3f/0x90 [ 35.297352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.297889] [ 35.298065] Second to last potentially related work creation: [ 35.298641] kasan_save_stack+0x22/0x50 [ 35.299055] __kasan_record_aux_stack+0x8e/0xa0 [ 35.299539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.300074] remove_vma+0x139/0x170 [ 35.300446] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.300911] do_vmi_munmap+0x1f1/0x2b0 [ 35.301317] mmap_region+0x1f9/0x2660 [ 35.301721] do_mmap+0x854/0xf00 [ 35.302075] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.302484] ksys_mmap_pgoff+0x3af/0x500 [ 35.302896] do_syscall_64+0x3f/0x90 [ 35.303282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.303813] [ 35.303992] The buggy address belongs to the object at ffff888019491828 [ 35.303992] which belongs to the cache vm_area_struct of size 168 [ 35.305207] The buggy address is located 88 bytes inside of [ 35.305207] freed 168-byte region [ffff888019491828, ffff8880194918d0) [ 35.306387] [ 35.306565] The buggy address belongs to the physical page: [ 35.307121] page:00000000c21ffb24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19491 [ 35.308027] memcg:ffff888009d4e201 [ 35.308376] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.308956] page_type: 0xffffffff() [ 35.309326] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.310087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009d4e201 [ 35.310830] page dumped because: kasan: bad access detected [ 35.311379] [ 35.311568] Memory state around the buggy address: [ 35.312047] ffff888019491780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.312760] ffff888019491800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.313467] >ffff888019491880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.314169] ^ [ 35.314512] ffff888019491900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.315215] ffff888019491980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 35.315932] ================================================================== [ 35.316737] Disabling lock debugging due to kernel taint [ 37.342624] BUG: Bad rss-counter state mm:000000005fa513ba type:MM_FILEPAGES val:33 [ 37.343460] BUG: Bad rss-counter state mm:000000005fa513ba type:MM_ANONPAGES val:22 [ 37.906852] BUG: Bad rss-counter state mm:00000000634bcff2 type:MM_FILEPAGES val:33 [ 37.908065] BUG: Bad rss-counter state mm:00000000634bcff2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39275' (ECDSA) to the list of known hosts. 2023/06/20 03:59:01 fuzzer started 2023/06/20 03:59:02 dialing manager at localhost:44161 2023/06/20 03:59:02 checking machine... 2023/06/20 03:59:02 checking revisions... [ 38.546955] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:59:02 testing simple program... [ 38.589697] cgroup: Unknown subsys name 'net' [ 38.627221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:58:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880100c6298 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff8880100c6298 RSP=ffff88800f28f848 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000246 R13=0000000000000000 R14=0000000000000003 R15=0000000000000003 RIP=ffffffff8452fd1e RFL=00000082 [--S----] 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 00007f8b70a08700 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=00007ffc55488938 CR3=000000000dede000 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=2031303a39353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09e68 RCX=0000000000000002 RDX=1ffff1100d9e1355 RSI=ffff88806cf09e58 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e58 R15=ffff88806cf09a98 RIP=ffffffff81131ca6 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 00007f4afdeec900 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=00007f4afe4a3618 CR3=000000000ef0a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000