syzkaller login: [ 28.873950] BUG: Bad rss-counter state mm:00000000f4049010 type:MM_FILEPAGES val:33 [ 28.875513] BUG: Bad rss-counter state mm:00000000f4049010 type:MM_ANONPAGES val:22 [ 29.048075] ================================================================== [ 29.049160] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.050410] Read of size 8 at addr ffff88801a0394e0 by task sshd/221 [ 29.051244] [ 29.051475] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.052424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.053485] Call Trace: [ 29.053841] [ 29.054156] dump_stack_lvl+0x91/0xf0 [ 29.054689] print_report+0xcc/0x620 [ 29.055208] ? __virt_addr_valid+0x102/0x340 [ 29.055803] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.056471] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.057132] kasan_report+0xbe/0xf0 [ 29.057651] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.058350] vma_interval_tree_remove+0xc75/0xec0 [ 29.059005] vma_prepare+0xc54/0x11a0 [ 29.059527] __split_vma+0x5af/0x950 [ 29.060046] ? __pfx___split_vma+0x10/0x10 [ 29.060618] ? find_held_lock+0x2c/0x110 [ 29.061176] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.061781] ? lock_is_held_type+0x9f/0x120 [ 29.062362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.063025] ? mtree_range_walk+0x632/0x900 [ 29.063623] ? mas_walk+0x5c7/0x7c0 [ 29.064137] do_vmi_munmap+0x1f1/0x2b0 [ 29.064676] mmap_region+0x1f9/0x2660 [ 29.065194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.065749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.066521] ? __pfx_lock_acquire+0x10/0x10 [ 29.067095] ? __pfx_mmap_region+0x10/0x10 [ 29.067662] ? security_mmap_addr+0x7d/0xa0 [ 29.068236] ? get_unmapped_area+0x1f5/0x3f0 [ 29.068828] do_mmap+0x854/0xf00 [ 29.069298] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.069831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.070456] ksys_mmap_pgoff+0x3af/0x500 [ 29.071001] do_syscall_64+0x3f/0x90 [ 29.071510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.072204] RIP: 0033:0x7f5e7d101d82 [ 29.072691] 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 [ 29.074964] RSP: 002b:00007fff62ddd218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.075932] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e7d101d82 [ 29.076837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e7c53b000 [ 29.077736] RBP: 00007f5e7c53b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.078642] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d765ccfd90 [ 29.079540] R13: 00007fff62ddd230 R14: 00007fff62ddd260 R15: 00007fff62ddd5c0 [ 29.080459] [ 29.080772] [ 29.081004] Allocated by task 214: [ 29.081464] kasan_save_stack+0x22/0x50 [ 29.081998] kasan_set_track+0x25/0x30 [ 29.082537] __kasan_slab_alloc+0x59/0x70 [ 29.083095] kmem_cache_alloc+0x16b/0x370 [ 29.083647] vm_area_dup+0x20/0x160 [ 29.084137] __split_vma+0x170/0x950 [ 29.084635] split_vma+0xc6/0x110 [ 29.085109] mprotect_fixup+0x8d2/0xb30 [ 29.085648] do_mprotect_pkey+0x87e/0xd40 [ 29.086206] __x64_sys_mprotect+0x78/0xc0 [ 29.086772] do_syscall_64+0x3f/0x90 [ 29.087286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.087975] [ 29.088208] Freed by task 214: [ 29.088634] kasan_save_stack+0x22/0x50 [ 29.089175] kasan_set_track+0x25/0x30 [ 29.089703] kasan_save_free_info+0x2b/0x50 [ 29.090271] __kasan_slab_free+0x10a/0x190 [ 29.090858] kmem_cache_free+0x10d/0x4d0 [ 29.091400] rcu_core+0x8c8/0x2860 [ 29.091878] __do_softirq+0x1b7/0x7d4 [ 29.092392] [ 29.092621] Last potentially related work creation: [ 29.093248] kasan_save_stack+0x22/0x50 [ 29.093786] __kasan_record_aux_stack+0x8e/0xa0 [ 29.094405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.095101] remove_vma+0x139/0x170 [ 29.095583] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.096175] do_vmi_munmap+0x1f1/0x2b0 [ 29.096702] __vm_munmap+0x138/0x3a0 [ 29.097215] __x64_sys_munmap+0x59/0x80 [ 29.097767] do_syscall_64+0x3f/0x90 [ 29.098292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.099028] [ 29.099267] Second to last potentially related work creation: [ 29.100024] kasan_save_stack+0x22/0x50 [ 29.100581] __kasan_record_aux_stack+0x8e/0xa0 [ 29.101208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.101910] remove_vma+0x139/0x170 [ 29.102418] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.103034] do_vmi_munmap+0x1f1/0x2b0 [ 29.103566] mmap_region+0x1f9/0x2660 [ 29.104097] do_mmap+0x854/0xf00 [ 29.104574] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.105119] ksys_mmap_pgoff+0x3af/0x500 [ 29.105679] do_syscall_64+0x3f/0x90 [ 29.106201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.106916] [ 29.107153] The buggy address belongs to the object at ffff88801a039488 [ 29.107153] which belongs to the cache vm_area_struct of size 168 [ 29.108772] The buggy address is located 88 bytes inside of [ 29.108772] freed 168-byte region [ffff88801a039488, ffff88801a039530) [ 29.110307] [ 29.110564] The buggy address belongs to the physical page: [ 29.111292] page:00000000210eb47a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a039 [ 29.112497] memcg:ffff88801a02dd01 [ 29.112970] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.113673] page_type: 0xffffffff() [ 29.114168] raw: 0100000000000200 ffff8880087a0c80 ffffea00001a1a80 dead000000000004 [ 29.115189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a02dd01 [ 29.116188] page dumped because: kasan: bad access detected [ 29.116911] [ 29.117144] Memory state around the buggy address: [ 29.117768] ffff88801a039380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.118732] ffff88801a039400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.119688] >ffff88801a039480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.120633] ^ [ 29.121475] ffff88801a039500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.122415] ffff88801a039580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.123332] ================================================================== [ 29.124542] Disabling lock debugging due to kernel taint [ 31.024275] BUG: Bad rss-counter state mm:000000009f295182 type:MM_FILEPAGES val:33 [ 31.025459] BUG: Bad rss-counter state mm:000000009f295182 type:MM_ANONPAGES val:22 [ 31.495082] BUG: Bad rss-counter state mm:000000001e046cc6 type:MM_FILEPAGES val:33 [ 31.496089] BUG: Bad rss-counter state mm:000000001e046cc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36512' (ECDSA) to the list of known hosts. 2023/06/20 22:28:03 fuzzer started 2023/06/20 22:28:03 dialing manager at localhost:36067 2023/06/20 22:28:03 checking machine... 2023/06/20 22:28:03 checking revisions... [ 32.221941] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:28:03 testing simple program... [ 32.269526] cgroup: Unknown subsys name 'net' [ 32.332753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:28:02 Registers: info registers vcpu 0 RAX=1ffff1100132d639 RBX=ffff88800996b198 RCX=ffffffff812e0135 RDX=dffffc0000000000 RSI=ffff88800941ba30 RDI=ffff88800996b1c8 RBP=ffff88800b0029f8 RSP=ffff8880142679c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800941ba20 R13=0000000000000000 R14=ffff888018d91768 R15=ffff888018d91720 RIP=ffffffff8184767e 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 00007f28e3046900 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=00007eff18acf650 CR3=000000000b892000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3ef16b8a2129d8e000000000000ae988 XMM05=6da206a8698d8dd30000000000133f98 XMM06=c291bd5c70af25b90000000000132d88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff07e47bf8 CR3=00000000141ba000 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=2032303a38323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000