syzkaller login: [ 31.873095] BUG: Bad rss-counter state mm:00000000b0c1ab06 type:MM_FILEPAGES val:33 [ 31.874083] BUG: Bad rss-counter state mm:00000000b0c1ab06 type:MM_ANONPAGES val:22 [ 31.909901] ================================================================== [ 31.910940] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.911911] Read of size 8 at addr ffff88800ffe1880 by task sshd/221 [ 31.912798] [ 31.913023] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.913910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.914901] Call Trace: [ 31.915233] [ 31.915520] dump_stack_lvl+0x91/0xf0 [ 31.916025] print_report+0xcc/0x620 [ 31.916545] ? __virt_addr_valid+0x102/0x340 [ 31.917140] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.917771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.918409] kasan_report+0xbe/0xf0 [ 31.918890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919534] vma_interval_tree_remove+0xc75/0xec0 [ 31.920188] vma_prepare+0xc54/0x11a0 [ 31.920676] __split_vma+0x5af/0x950 [ 31.921187] ? __pfx___split_vma+0x10/0x10 [ 31.921725] ? find_held_lock+0x2c/0x110 [ 31.922272] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.922846] ? lock_is_held_type+0x9f/0x120 [ 31.923396] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.924017] ? mtree_range_walk+0x632/0x900 [ 31.924586] ? mas_walk+0x5c7/0x7c0 [ 31.925072] do_vmi_munmap+0x1f1/0x2b0 [ 31.925595] mmap_region+0x1f9/0x2660 [ 31.926091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.926604] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.927359] ? __pfx_lock_acquire+0x10/0x10 [ 31.927922] ? __pfx_mmap_region+0x10/0x10 [ 31.928468] ? security_mmap_addr+0x7d/0xa0 [ 31.929007] ? get_unmapped_area+0x1f5/0x3f0 [ 31.929586] do_mmap+0x854/0xf00 [ 31.930037] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.930551] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.931156] ksys_mmap_pgoff+0x3af/0x500 [ 31.931696] do_syscall_64+0x3f/0x90 [ 31.932227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.932894] RIP: 0033:0x7fe1c5babd82 [ 31.933387] 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 [ 31.935548] RSP: 002b:00007ffcacf9abe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.936473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1c5babd82 [ 31.937346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1c4fe5000 [ 31.938206] RBP: 00007fe1c4fe5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.939064] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d16bb4ec0 [ 31.939933] R13: 00007ffcacf9ac00 R14: 00007ffcacf9ac30 R15: 00007ffcacf9af90 [ 31.940804] [ 31.941122] [ 31.941340] Allocated by task 214: [ 31.941771] kasan_save_stack+0x22/0x50 [ 31.942308] kasan_set_track+0x25/0x30 [ 31.942800] __kasan_slab_alloc+0x59/0x70 [ 31.943339] kmem_cache_alloc+0x16b/0x370 [ 31.943862] vm_area_dup+0x20/0x160 [ 31.944335] __split_vma+0x170/0x950 [ 31.944806] split_vma+0xc6/0x110 [ 31.945276] mprotect_fixup+0x8d2/0xb30 [ 31.945785] do_mprotect_pkey+0x87e/0xd40 [ 31.946319] __x64_sys_mprotect+0x78/0xc0 [ 31.946845] do_syscall_64+0x3f/0x90 [ 31.947331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.947983] [ 31.948229] Freed by task 13: [ 31.948613] kasan_save_stack+0x22/0x50 [ 31.949142] kasan_set_track+0x25/0x30 [ 31.949637] kasan_save_free_info+0x2b/0x50 [ 31.950195] __kasan_slab_free+0x10a/0x190 [ 31.950730] kmem_cache_free+0x10d/0x4d0 [ 31.951251] rcu_core+0x8c8/0x2860 [ 31.951717] __do_softirq+0x1b7/0x7d4 [ 31.952212] [ 31.952427] Last potentially related work creation: [ 31.953019] kasan_save_stack+0x22/0x50 [ 31.953548] __kasan_record_aux_stack+0x8e/0xa0 [ 31.954143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.954827] remove_vma+0x139/0x170 [ 31.955288] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.955859] do_vmi_munmap+0x1f1/0x2b0 [ 31.956364] __vm_munmap+0x138/0x3a0 [ 31.956830] __x64_sys_munmap+0x59/0x80 [ 31.957349] do_syscall_64+0x3f/0x90 [ 31.957825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.958481] [ 31.958697] Second to last potentially related work creation: [ 31.959401] kasan_save_stack+0x22/0x50 [ 31.959933] __kasan_record_aux_stack+0x8e/0xa0 [ 31.960528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.961199] remove_vma+0x139/0x170 [ 31.961651] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.962221] do_vmi_munmap+0x1f1/0x2b0 [ 31.962706] mmap_region+0x1f9/0x2660 [ 31.963194] do_mmap+0x854/0xf00 [ 31.963625] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.964143] ksys_mmap_pgoff+0x3af/0x500 [ 31.964645] do_syscall_64+0x3f/0x90 [ 31.965148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.965795] [ 31.966016] The buggy address belongs to the object at ffff88800ffe1828 [ 31.966016] which belongs to the cache vm_area_struct of size 168 [ 31.967508] The buggy address is located 88 bytes inside of [ 31.967508] freed 168-byte region [ffff88800ffe1828, ffff88800ffe18d0) [ 31.968933] [ 31.969187] The buggy address belongs to the physical page: [ 31.969846] page:00000000b7cc5b42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffe1 [ 31.970938] memcg:ffff88800d4aff01 [ 31.971378] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.972052] page_type: 0xffffffff() [ 31.972511] raw: 0100000000000200 ffff88800879fc80 ffffea00003a3280 dead000000000002 [ 31.973462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4aff01 [ 31.974380] page dumped because: kasan: bad access detected [ 31.975039] [ 31.975263] Memory state around the buggy address: [ 31.975869] ffff88800ffe1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.976735] ffff88800ffe1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.977617] >ffff88800ffe1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.978487] ^ [ 31.978902] ffff88800ffe1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.979787] ffff88800ffe1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.980657] ================================================================== [ 31.981625] Disabling lock debugging due to kernel taint [ 33.847046] BUG: Bad rss-counter state mm:000000009e8221be type:MM_FILEPAGES val:33 [ 33.847829] BUG: Bad rss-counter state mm:000000009e8221be type:MM_ANONPAGES val:22 [ 34.276205] BUG: Bad rss-counter state mm:00000000b3b0107c type:MM_FILEPAGES val:33 [ 34.277224] BUG: Bad rss-counter state mm:00000000b3b0107c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6606' (ECDSA) to the list of known hosts. 2023/06/19 21:15:47 fuzzer started 2023/06/19 21:15:47 dialing manager at localhost:44161 2023/06/19 21:15:47 checking machine... 2023/06/19 21:15:47 checking revisions... [ 34.915600] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:15:47 testing simple program... [ 34.957736] cgroup: Unknown subsys name 'net' [ 34.987614] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:15:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f19432d0e30 CR3=000000000d77a000 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=c3cc1a27b0db41bba24541786e0ba6a4 XMM02=000000000011d970ec2efd57dc4c00df XMM03=0000000000124640473cbf64b76470c9 XMM04=70370447d060703000000000000ae988 XMM05=e4cb8bb95a7664b60000000000135470 XMM06=778d85bf1a27c02300000000001342d8 XMM07=e042d86d42eb936e00000000001248c0 XMM08=473cbf64b76470c9000000000011d9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007f1c93be4618 CR3=0000000015d44000 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=2036343a35313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a35313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000