syzkaller login: [ 30.931873] BUG: Bad rss-counter state mm:00000000b6a88c5e type:MM_FILEPAGES val:33 [ 30.933725] BUG: Bad rss-counter state mm:00000000b6a88c5e type:MM_ANONPAGES val:22 [ 31.093183] ================================================================== [ 31.094106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.095085] Read of size 8 at addr ffff88800eec4880 by task sshd/220 [ 31.095878] [ 31.096111] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.097108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.098118] Call Trace: [ 31.098446] [ 31.098734] dump_stack_lvl+0x91/0xf0 [ 31.099247] print_report+0xcc/0x620 [ 31.099735] ? __virt_addr_valid+0x102/0x340 [ 31.100296] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.100918] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101554] kasan_report+0xbe/0xf0 [ 31.102046] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.102681] vma_interval_tree_remove+0xc75/0xec0 [ 31.103288] vma_prepare+0xc54/0x11a0 [ 31.103769] __split_vma+0x5af/0x950 [ 31.104267] ? __pfx___split_vma+0x10/0x10 [ 31.104803] ? find_held_lock+0x2c/0x110 [ 31.105322] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.105885] ? lock_is_held_type+0x9f/0x120 [ 31.106421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.107032] ? mtree_range_walk+0x632/0x900 [ 31.107586] ? mas_walk+0x5c7/0x7c0 [ 31.108071] do_vmi_munmap+0x1f1/0x2b0 [ 31.108568] mmap_region+0x1f9/0x2660 [ 31.109054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.109565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.110295] ? __pfx_lock_acquire+0x10/0x10 [ 31.110830] ? __pfx_mmap_region+0x10/0x10 [ 31.111363] ? security_mmap_addr+0x7d/0xa0 [ 31.111900] ? get_unmapped_area+0x1f5/0x3f0 [ 31.112472] do_mmap+0x854/0xf00 [ 31.112922] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.113421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.113991] ksys_mmap_pgoff+0x3af/0x500 [ 31.114503] do_syscall_64+0x3f/0x90 [ 31.114976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.115635] RIP: 0033:0x7f0e79e24d82 [ 31.116119] 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 [ 31.118305] RSP: 002b:00007ffc9c8297e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.119235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e79e24d82 [ 31.120091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e7925e000 [ 31.120942] RBP: 00007f0e7925e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.121791] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc3fde2d90 [ 31.122639] R13: 00007ffc9c829800 R14: 00007ffc9c829830 R15: 00007ffc9c829b90 [ 31.123495] [ 31.123789] [ 31.124024] Allocated by task 213: [ 31.124453] kasan_save_stack+0x22/0x50 [ 31.124957] kasan_set_track+0x25/0x30 [ 31.125455] __kasan_slab_alloc+0x59/0x70 [ 31.125977] kmem_cache_alloc+0x16b/0x370 [ 31.126492] vm_area_dup+0x20/0x160 [ 31.126951] __split_vma+0x170/0x950 [ 31.127418] split_vma+0xc6/0x110 [ 31.127857] mprotect_fixup+0x8d2/0xb30 [ 31.128370] do_mprotect_pkey+0x87e/0xd40 [ 31.128892] __x64_sys_mprotect+0x78/0xc0 [ 31.129417] do_syscall_64+0x3f/0x90 [ 31.129890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.130533] [ 31.130757] Freed by task 213: [ 31.131154] kasan_save_stack+0x22/0x50 [ 31.131669] kasan_set_track+0x25/0x30 [ 31.132181] kasan_save_free_info+0x2b/0x50 [ 31.132727] __kasan_slab_free+0x10a/0x190 [ 31.133258] kmem_cache_free+0x10d/0x4d0 [ 31.133772] rcu_core+0x8c8/0x2860 [ 31.134228] __do_softirq+0x1b7/0x7d4 [ 31.134714] [ 31.134935] Last potentially related work creation: [ 31.135518] kasan_save_stack+0x22/0x50 [ 31.136032] __kasan_record_aux_stack+0x8e/0xa0 [ 31.136620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.137279] remove_vma+0x139/0x170 [ 31.137751] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.138378] do_vmi_munmap+0x1f1/0x2b0 [ 31.138878] __vm_munmap+0x138/0x3a0 [ 31.139356] __x64_sys_munmap+0x59/0x80 [ 31.139859] do_syscall_64+0x3f/0x90 [ 31.140369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141011] [ 31.141232] Second to last potentially related work creation: [ 31.141934] kasan_save_stack+0x22/0x50 [ 31.142453] __kasan_record_aux_stack+0x8e/0xa0 [ 31.143045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.143689] remove_vma+0x139/0x170 [ 31.144153] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.144710] do_vmi_munmap+0x1f1/0x2b0 [ 31.145255] mmap_region+0x1f9/0x2660 [ 31.145751] do_mmap+0x854/0xf00 [ 31.146204] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.146717] ksys_mmap_pgoff+0x3af/0x500 [ 31.147236] do_syscall_64+0x3f/0x90 [ 31.147734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.148417] [ 31.148639] The buggy address belongs to the object at ffff88800eec4828 [ 31.148639] which belongs to the cache vm_area_struct of size 168 [ 31.150174] The buggy address is located 88 bytes inside of [ 31.150174] freed 168-byte region [ffff88800eec4828, ffff88800eec48d0) [ 31.151645] [ 31.151875] The buggy address belongs to the physical page: [ 31.152590] page:0000000016f165c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec4 [ 31.153728] memcg:ffff88800c8b9701 [ 31.154176] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.154852] page_type: 0xffffffff() [ 31.155327] raw: 0100000000000200 ffff88800879fc80 ffffea0000268980 dead000000000006 [ 31.156292] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8b9701 [ 31.157243] page dumped because: kasan: bad access detected [ 31.157939] [ 31.158168] Memory state around the buggy address: [ 31.158774] ffff88800eec4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.159675] ffff88800eec4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.160586] >ffff88800eec4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.161473] ^ [ 31.161913] ffff88800eec4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.162817] ffff88800eec4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.163723] ================================================================== [ 31.164698] Disabling lock debugging due to kernel taint [ 32.919400] BUG: Bad rss-counter state mm:000000000204dde0 type:MM_FILEPAGES val:33 [ 32.920248] BUG: Bad rss-counter state mm:000000000204dde0 type:MM_ANONPAGES val:22 [ 33.386784] BUG: Bad rss-counter state mm:0000000049ee17b4 type:MM_FILEPAGES val:33 [ 33.387918] BUG: Bad rss-counter state mm:0000000049ee17b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45512' (ECDSA) to the list of known hosts. 2023/06/19 14:27:57 fuzzer started 2023/06/19 14:27:58 dialing manager at localhost:44161 2023/06/19 14:27:58 checking machine... 2023/06/19 14:27:58 checking revisions... [ 34.098097] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:27:58 testing simple program... [ 34.139005] cgroup: Unknown subsys name 'net' [ 34.175910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:27:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff856529e0 RCX=0000000080000000 RDX=ffff888009101b40 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015c67860 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fa588b5b477 R13=0000000000000000 R14=ffff888009101b40 R15=0000000000000dc0 RIP=ffffffff814c07f1 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 00007fa588668900 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=00007fa588c200b0 CR3=000000000c6e6000 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=37323a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343331 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1d87b2f9f0 CR3=000000000c5d6000 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=2037353a37323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a37323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000