syzkaller login: [ 46.914520] BUG: Bad rss-counter state mm:00000000b8fd7cef type:MM_FILEPAGES val:33 [ 46.916412] BUG: Bad rss-counter state mm:00000000b8fd7cef type:MM_ANONPAGES val:22 [ 47.087878] ================================================================== [ 47.088847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.089878] Read of size 8 at addr ffff88800e4eac20 by task sshd/220 [ 47.090857] [ 47.091087] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.092033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.093110] Call Trace: [ 47.093485] [ 47.093787] dump_stack_lvl+0x91/0xf0 [ 47.094320] print_report+0xcc/0x620 [ 47.094832] ? __virt_addr_valid+0x102/0x340 [ 47.095437] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.096092] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.096756] kasan_report+0xbe/0xf0 [ 47.097270] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.097945] vma_interval_tree_remove+0xc75/0xec0 [ 47.098605] vma_prepare+0xc54/0x11a0 [ 47.099113] __split_vma+0x5af/0x950 [ 47.099637] ? __pfx___split_vma+0x10/0x10 [ 47.100209] ? find_held_lock+0x2c/0x110 [ 47.100769] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.101392] ? lock_is_held_type+0x9f/0x120 [ 47.101966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.102626] ? mtree_range_walk+0x632/0x900 [ 47.103223] ? mas_walk+0x5c7/0x7c0 [ 47.103732] do_vmi_munmap+0x1f1/0x2b0 [ 47.104268] mmap_region+0x1f9/0x2660 [ 47.104775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.105337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.106080] ? __pfx_lock_acquire+0x10/0x10 [ 47.106650] ? __pfx_mmap_region+0x10/0x10 [ 47.107205] ? security_mmap_addr+0x7d/0xa0 [ 47.107763] ? get_unmapped_area+0x1f5/0x3f0 [ 47.108343] do_mmap+0x854/0xf00 [ 47.108796] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.109338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.109927] ksys_mmap_pgoff+0x3af/0x500 [ 47.110482] do_syscall_64+0x3f/0x90 [ 47.111029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.111776] RIP: 0033:0x7f18ba467d82 [ 47.112285] 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 [ 47.114542] RSP: 002b:00007ffeb6dd9108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.115492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18ba467d82 [ 47.116378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18b98a1000 [ 47.117356] RBP: 00007f18b98a1000 R08: 0000000000000009 R09: 0000000000001000 [ 47.118550] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f136003ec0 [ 47.119662] R13: 00007ffeb6dd9120 R14: 00007ffeb6dd9150 R15: 00007ffeb6dd94b0 [ 47.120791] [ 47.121174] [ 47.121477] Allocated by task 213: [ 47.122034] kasan_save_stack+0x22/0x50 [ 47.122721] kasan_set_track+0x25/0x30 [ 47.123286] __kasan_slab_alloc+0x59/0x70 [ 47.123829] kmem_cache_alloc+0x16b/0x370 [ 47.124376] vm_area_dup+0x20/0x160 [ 47.124844] __split_vma+0x170/0x950 [ 47.125359] split_vma+0xc6/0x110 [ 47.125819] mprotect_fixup+0x8d2/0xb30 [ 47.126358] do_mprotect_pkey+0x87e/0xd40 [ 47.126894] __x64_sys_mprotect+0x78/0xc0 [ 47.127454] do_syscall_64+0x3f/0x90 [ 47.127954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.128627] [ 47.128846] Freed by task 213: [ 47.129266] kasan_save_stack+0x22/0x50 [ 47.129803] kasan_set_track+0x25/0x30 [ 47.130330] kasan_save_free_info+0x2b/0x50 [ 47.130880] __kasan_slab_free+0x10a/0x190 [ 47.131438] kmem_cache_free+0x10d/0x4d0 [ 47.132017] rcu_core+0x8c8/0x2860 [ 47.132504] __do_softirq+0x1b7/0x7d4 [ 47.132996] [ 47.133230] Last potentially related work creation: [ 47.133853] kasan_save_stack+0x22/0x50 [ 47.134382] __kasan_record_aux_stack+0x8e/0xa0 [ 47.134977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.135651] remove_vma+0x139/0x170 [ 47.136117] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.136715] do_vmi_munmap+0x1f1/0x2b0 [ 47.137239] __vm_munmap+0x138/0x3a0 [ 47.137750] __x64_sys_munmap+0x59/0x80 [ 47.138293] do_syscall_64+0x3f/0x90 [ 47.138779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.139469] [ 47.139690] Second to last potentially related work creation: [ 47.140403] kasan_save_stack+0x22/0x50 [ 47.140928] __kasan_record_aux_stack+0x8e/0xa0 [ 47.141568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.142240] remove_vma+0x139/0x170 [ 47.142715] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.143298] do_vmi_munmap+0x1f1/0x2b0 [ 47.143805] mmap_region+0x1f9/0x2660 [ 47.144304] do_mmap+0x854/0xf00 [ 47.144753] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.145277] ksys_mmap_pgoff+0x3af/0x500 [ 47.145807] do_syscall_64+0x3f/0x90 [ 47.146323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.146982] [ 47.147210] The buggy address belongs to the object at ffff88800e4eabc8 [ 47.147210] which belongs to the cache vm_area_struct of size 168 [ 47.148749] The buggy address is located 88 bytes inside of [ 47.148749] freed 168-byte region [ffff88800e4eabc8, ffff88800e4eac70) [ 47.150255] [ 47.150490] The buggy address belongs to the physical page: [ 47.151202] page:000000001da73444 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4ea [ 47.152383] memcg:ffff88800dd69401 [ 47.152828] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.153606] page_type: 0xffffffff() [ 47.154076] raw: 0100000000000200 ffff88800879fc80 ffffea000035e9c0 dead000000000003 [ 47.155038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd69401 [ 47.156005] page dumped because: kasan: bad access detected [ 47.156698] [ 47.156922] Memory state around the buggy address: [ 47.157542] ffff88800e4eab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.158436] ffff88800e4eab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 47.159343] >ffff88800e4eac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 47.160231] ^ [ 47.160772] ffff88800e4eac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 47.161678] ffff88800e4ead00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 47.162570] ================================================================== [ 47.163620] Disabling lock debugging due to kernel taint [ 49.063482] BUG: Bad rss-counter state mm:00000000da25bfd3 type:MM_FILEPAGES val:33 [ 49.064974] BUG: Bad rss-counter state mm:00000000da25bfd3 type:MM_ANONPAGES val:22 [ 49.490956] BUG: Bad rss-counter state mm:000000005a9206fc type:MM_FILEPAGES val:33 [ 49.491736] BUG: Bad rss-counter state mm:000000005a9206fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12777' (ECDSA) to the list of known hosts. 2023/06/19 10:56:52 fuzzer started 2023/06/19 10:56:52 dialing manager at localhost:44161 2023/06/19 10:56:52 checking machine... 2023/06/19 10:56:52 checking revisions... [ 50.155847] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:56:52 testing simple program... [ 50.204920] cgroup: Unknown subsys name 'net' [ 50.263996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801aba72f0 RCX=0000000000000000 RDX=1ffff11003574e62 RSI=ffffffff81f158a5 RDI=ffff888018e3c5f8 RBP=ffff888018e3c5c0 RSP=ffff888019f1fc58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801aba7312 R13=ffff888018cda178 R14=ffffffff84d2fa00 R15=ffff888008f92000 RIP=ffffffff81f158c6 RFL=00000212 [----A--] 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 00007f9921da1900 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=00007ffc96ca7000 CR3=000000000c4f2000 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=dffffc0000000000 RBX=ffff88806cf09b30 RCX=ffff88806cf09b38 RDX=ffff88806cf09a98 RSI=1ffff1100d9e1355 RDI=ffff88806cf09a98 RBP=dffffc0000000000 RSP=ffff88806cf09a30 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=ffffed100d9e1355 R13=ffffed100d9e1354 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff811305e8 RFL=00000216 [----AP-] 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=00007f6f6812da30 CR3=000000000c756000 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=14fe2b50b7f370bfc64baeea0cb36878 XMM02=000000000011fa08eff9b2d0a8fce9cb XMM03=000000000011fad82c67c8bc2e329bc3 XMM04=02e6a3d97edf970200000000000ae988 XMM05=19e9129bd510f2350000000000134f80 XMM06=c974e2e24b637a2d0000000000133de8 XMM07=e042d86d42eb936e00000000001243c0 XMM08=a2e87a99694884ab000000000011fad8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000