syzkaller login: [ 78.825629] BUG: Bad rss-counter state mm:000000009cb62070 type:MM_FILEPAGES val:33 [ 78.827131] BUG: Bad rss-counter state mm:000000009cb62070 type:MM_ANONPAGES val:22 [ 78.934734] ================================================================== [ 78.935752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.936806] Read of size 8 at addr ffff88800fbbc4e0 by task sshd/221 [ 78.937813] [ 78.938069] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 78.939225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.940293] Call Trace: [ 78.940642] [ 78.940958] dump_stack_lvl+0x91/0xf0 [ 78.941500] print_report+0xcc/0x620 [ 78.942043] ? __virt_addr_valid+0x102/0x340 [ 78.942637] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.943333] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.944018] kasan_report+0xbe/0xf0 [ 78.944558] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.945259] vma_interval_tree_remove+0xc75/0xec0 [ 78.945913] vma_prepare+0xc54/0x11a0 [ 78.946439] __split_vma+0x5af/0x950 [ 78.946952] ? __pfx___split_vma+0x10/0x10 [ 78.947560] ? find_held_lock+0x2c/0x110 [ 78.948130] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.948743] ? lock_is_held_type+0x9f/0x120 [ 78.949385] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.950070] ? mtree_range_walk+0x632/0x900 [ 78.950666] ? mas_walk+0x5c7/0x7c0 [ 78.951229] do_vmi_munmap+0x1f1/0x2b0 [ 78.951769] mmap_region+0x1f9/0x2660 [ 78.952309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.952877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.953661] ? __pfx_lock_acquire+0x10/0x10 [ 78.954279] ? __pfx_mmap_region+0x10/0x10 [ 78.954853] ? security_mmap_addr+0x7d/0xa0 [ 78.955462] ? get_unmapped_area+0x1f5/0x3f0 [ 78.956077] do_mmap+0x854/0xf00 [ 78.956563] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.957111] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.957732] ksys_mmap_pgoff+0x3af/0x500 [ 78.958303] do_syscall_64+0x3f/0x90 [ 78.958826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.959565] RIP: 0033:0x7f1e04662d82 [ 78.960083] 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 [ 78.962403] RSP: 002b:00007ffda6a0c418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.963421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e04662d82 [ 78.964364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e03a9c000 [ 78.965313] RBP: 00007f1e03a9c000 R08: 0000000000000009 R09: 0000000000001000 [ 78.966249] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd729aaec0 [ 78.967192] R13: 00007ffda6a0c430 R14: 00007ffda6a0c460 R15: 00007ffda6a0c7c0 [ 78.968139] [ 78.968459] [ 78.968696] Allocated by task 214: [ 78.969180] kasan_save_stack+0x22/0x50 [ 78.969732] kasan_set_track+0x25/0x30 [ 78.970286] __kasan_slab_alloc+0x59/0x70 [ 78.970853] kmem_cache_alloc+0x16b/0x370 [ 78.971439] vm_area_dup+0x20/0x160 [ 78.971931] __split_vma+0x170/0x950 [ 78.972447] split_vma+0xc6/0x110 [ 78.972924] mprotect_fixup+0x8d2/0xb30 [ 78.973487] do_mprotect_pkey+0x87e/0xd40 [ 78.974080] __x64_sys_mprotect+0x78/0xc0 [ 78.974640] do_syscall_64+0x3f/0x90 [ 78.975183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.975867] [ 78.976113] Freed by task 214: [ 78.976532] kasan_save_stack+0x22/0x50 [ 78.977086] kasan_set_track+0x25/0x30 [ 78.977614] kasan_save_free_info+0x2b/0x50 [ 78.978200] __kasan_slab_free+0x10a/0x190 [ 78.978763] kmem_cache_free+0x10d/0x4d0 [ 78.979332] rcu_core+0x8c8/0x2860 [ 78.979808] __do_softirq+0x1b7/0x7d4 [ 78.980337] [ 78.980568] Last potentially related work creation: [ 78.981240] kasan_save_stack+0x22/0x50 [ 78.981793] __kasan_record_aux_stack+0x8e/0xa0 [ 78.982437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.983165] remove_vma+0x139/0x170 [ 78.983660] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.984291] do_vmi_munmap+0x1f1/0x2b0 [ 78.984821] __vm_munmap+0x138/0x3a0 [ 78.985336] __x64_sys_munmap+0x59/0x80 [ 78.985887] do_syscall_64+0x3f/0x90 [ 78.986408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.987128] [ 78.987367] Second to last potentially related work creation: [ 78.988124] kasan_save_stack+0x22/0x50 [ 78.988671] __kasan_record_aux_stack+0x8e/0xa0 [ 78.989313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.990030] remove_vma+0x139/0x170 [ 78.990518] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.991138] do_vmi_munmap+0x1f1/0x2b0 [ 78.991663] __vm_munmap+0x138/0x3a0 [ 78.992177] __x64_sys_munmap+0x59/0x80 [ 78.992710] do_syscall_64+0x3f/0x90 [ 78.993230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.993918] [ 78.994172] The buggy address belongs to the object at ffff88800fbbc488 [ 78.994172] which belongs to the cache vm_area_struct of size 168 [ 78.995778] The buggy address is located 88 bytes inside of [ 78.995778] freed 168-byte region [ffff88800fbbc488, ffff88800fbbc530) [ 78.997283] [ 78.997515] The buggy address belongs to the physical page: [ 78.998245] page:00000000d9e037f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbbc [ 78.999422] memcg:ffff888019803d01 [ 78.999879] flags: 0x100000000000200(slab|node=0|zone=1) [ 79.000576] page_type: 0xffffffff() [ 79.001071] raw: 0100000000000200 ffff88800879fc80 ffffea000038f640 0000000000000006 [ 79.002067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019803d01 [ 79.003045] page dumped because: kasan: bad access detected [ 79.003753] [ 79.003991] Memory state around the buggy address: [ 79.004616] ffff88800fbbc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 79.005539] ffff88800fbbc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 79.006454] >ffff88800fbbc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.007386] ^ [ 79.008209] ffff88800fbbc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 79.009130] ffff88800fbbc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 79.010044] ================================================================== [ 79.011143] Disabling lock debugging due to kernel taint [ 80.992142] BUG: Bad rss-counter state mm:0000000071d499c1 type:MM_FILEPAGES val:33 [ 80.993324] BUG: Bad rss-counter state mm:0000000071d499c1 type:MM_ANONPAGES val:22 [ 81.460600] BUG: Bad rss-counter state mm:000000009edd1c2e type:MM_FILEPAGES val:33 [ 81.461792] BUG: Bad rss-counter state mm:000000009edd1c2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25609' (ECDSA) to the list of known hosts. 2023/06/19 19:09:15 fuzzer started 2023/06/19 19:09:16 dialing manager at localhost:44161 2023/06/19 19:09:16 checking machine... 2023/06/19 19:09:16 checking revisions... [ 82.099559] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:09:16 testing simple program... [ 82.142716] cgroup: Unknown subsys name 'net' [ 82.183641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:08:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880102e7768 RCX=0000000000000001 RDX=ffff8880102e76d8 RSI=ffff8880102e76a0 RDI=ffff8880102e76e0 RBP=dffffc0000000000 RSP=ffff8880102e7680 R8 =0000000000000001 R9 =ffff8880102e7710 R10=0000000000038001 R11=0000000000006097 R12=ffffed100205cedc R13=ffffed100205cedb R14=ffff8880102e7718 R15=ffff8880102e76d0 RIP=ffffffff81132f8e 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 00007f8efde0a900 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=00007fcfaa17c650 CR3=000000000c672000 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=7a51012cdd78690900000000000ae988 XMM05=c761901acb32c8c2000000000013a7f8 XMM06=c291bd5c70af25b900000000001395e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007fffa70b87f8 CR3=0000000019510000 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=39303a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303037 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000