syzkaller login: [ 30.434209] BUG: Bad rss-counter state mm:00000000c29ebda2 type:MM_FILEPAGES val:33 [ 30.435514] BUG: Bad rss-counter state mm:00000000c29ebda2 type:MM_ANONPAGES val:22 [ 30.604599] ================================================================== [ 30.605566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.606565] Read of size 8 at addr ffff888019d9e058 by task sshd/220 [ 30.607385] [ 30.607804] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.608720] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.609903] Call Trace: [ 30.610293] [ 30.610637] dump_stack_lvl+0x91/0xf0 [ 30.611241] print_report+0xcc/0x620 [ 30.611832] ? __virt_addr_valid+0x102/0x340 [ 30.612493] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613221] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613950] kasan_report+0xbe/0xf0 [ 30.614519] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.615255] vma_interval_tree_remove+0xc75/0xec0 [ 30.615991] vma_prepare+0xc54/0x11a0 [ 30.616569] __split_vma+0x5af/0x950 [ 30.617135] ? __pfx___split_vma+0x10/0x10 [ 30.617780] ? find_held_lock+0x2c/0x110 [ 30.618414] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.619119] ? lock_is_held_type+0x9f/0x120 [ 30.619823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.620564] ? mtree_range_walk+0x632/0x900 [ 30.621162] ? mas_walk+0x5c7/0x7c0 [ 30.621680] do_vmi_munmap+0x1f1/0x2b0 [ 30.622225] mmap_region+0x1f9/0x2660 [ 30.622743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.623285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.624066] ? __pfx_lock_acquire+0x10/0x10 [ 30.624670] ? __pfx_mmap_region+0x10/0x10 [ 30.625263] ? security_mmap_addr+0x7d/0xa0 [ 30.625825] ? get_unmapped_area+0x1f5/0x3f0 [ 30.626406] do_mmap+0x854/0xf00 [ 30.626880] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.627435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.628069] ksys_mmap_pgoff+0x3af/0x500 [ 30.628649] do_syscall_64+0x3f/0x90 [ 30.629171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.629856] RIP: 0033:0x7fa271b50d82 [ 30.630339] 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 [ 30.632611] RSP: 002b:00007ffe5d058ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.633577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa271b50d82 [ 30.634486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa270f8a000 [ 30.635386] RBP: 00007fa270f8a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.636340] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f435abec0 [ 30.637247] R13: 00007ffe5d058ef0 R14: 00007ffe5d058f20 R15: 00007ffe5d059280 [ 30.638162] [ 30.638475] [ 30.638707] Allocated by task 213: [ 30.639165] kasan_save_stack+0x22/0x50 [ 30.639713] kasan_set_track+0x25/0x30 [ 30.640254] __kasan_slab_alloc+0x59/0x70 [ 30.640827] kmem_cache_alloc+0x16b/0x370 [ 30.641381] vm_area_dup+0x20/0x160 [ 30.641867] __split_vma+0x170/0x950 [ 30.642367] split_vma+0xc6/0x110 [ 30.642839] mprotect_fixup+0x8d2/0xb30 [ 30.643380] do_mprotect_pkey+0x87e/0xd40 [ 30.643944] __x64_sys_mprotect+0x78/0xc0 [ 30.644511] do_syscall_64+0x3f/0x90 [ 30.645026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.645712] [ 30.645940] Freed by task 13: [ 30.646352] kasan_save_stack+0x22/0x50 [ 30.646889] kasan_set_track+0x25/0x30 [ 30.647435] kasan_save_free_info+0x2b/0x50 [ 30.648002] __kasan_slab_free+0x10a/0x190 [ 30.648584] kmem_cache_free+0x10d/0x4d0 [ 30.649123] rcu_core+0x8c8/0x2860 [ 30.649598] __do_softirq+0x1b7/0x7d4 [ 30.650112] [ 30.650356] Last potentially related work creation: [ 30.650992] kasan_save_stack+0x22/0x50 [ 30.651541] __kasan_record_aux_stack+0x8e/0xa0 [ 30.652153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.652838] remove_vma+0x139/0x170 [ 30.653317] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.653912] do_vmi_munmap+0x1f1/0x2b0 [ 30.654432] __vm_munmap+0x138/0x3a0 [ 30.654930] __x64_sys_munmap+0x59/0x80 [ 30.655477] do_syscall_64+0x3f/0x90 [ 30.655982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656674] [ 30.656905] Second to last potentially related work creation: [ 30.657630] kasan_save_stack+0x22/0x50 [ 30.658168] __kasan_record_aux_stack+0x8e/0xa0 [ 30.658781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.659494] remove_vma+0x139/0x170 [ 30.659982] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.660576] do_vmi_munmap+0x1f1/0x2b0 [ 30.661112] mmap_region+0x1f9/0x2660 [ 30.661628] do_mmap+0x854/0xf00 [ 30.662085] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.662604] ksys_mmap_pgoff+0x3af/0x500 [ 30.663132] do_syscall_64+0x3f/0x90 [ 30.663644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664332] [ 30.664566] The buggy address belongs to the object at ffff888019d9e000 [ 30.664566] which belongs to the cache vm_area_struct of size 168 [ 30.666121] The buggy address is located 88 bytes inside of [ 30.666121] freed 168-byte region [ffff888019d9e000, ffff888019d9e0a8) [ 30.667632] [ 30.667864] The buggy address belongs to the physical page: [ 30.668575] page:00000000416b5b74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d9e [ 30.669747] memcg:ffff888009a93201 [ 30.670205] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.670905] page_type: 0xffffffff() [ 30.671408] raw: 0100000000000200 ffff8880087a0c80 ffffea0000676d00 dead000000000002 [ 30.672440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a93201 [ 30.673418] page dumped because: kasan: bad access detected [ 30.674161] [ 30.674387] Memory state around the buggy address: [ 30.675005] ffff888019d9df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.675954] ffff888019d9df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.676865] >ffff888019d9e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.677782] ^ [ 30.678555] ffff888019d9e080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.679472] ffff888019d9e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.680376] ================================================================== [ 30.681452] Disabling lock debugging due to kernel taint [ 32.735137] BUG: Bad rss-counter state mm:0000000068ebb287 type:MM_FILEPAGES val:33 [ 32.736152] BUG: Bad rss-counter state mm:0000000068ebb287 type:MM_ANONPAGES val:22 [ 33.239497] BUG: Bad rss-counter state mm:000000007301bbdd type:MM_FILEPAGES val:33 [ 33.240662] BUG: Bad rss-counter state mm:000000007301bbdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27276' (ECDSA) to the list of known hosts. 2023/06/21 00:41:59 fuzzer started 2023/06/21 00:41:59 dialing manager at localhost:36067 2023/06/21 00:41:59 checking machine... 2023/06/21 00:41:59 checking revisions... [ 33.954727] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:41:59 testing simple program... [ 34.009119] cgroup: Unknown subsys name 'net' [ 34.048743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:41:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdec0936f30 CR3=0000000009720000 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=8805197df29fa6b6e940e6a42d06aca9 XMM02=000000000011b180eff9b2d0a8fce9cb XMM03=000000000011b2502c67c8bc2e329bc3 XMM04=7cd06db7da71986b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133020 XMM06=73b7b018dcd6c0680000000000131e88 XMM07=e042d86d42eb936e0000000000121e08 XMM08=ab14f9a484c114f4000000000011b250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009998000 RBX=ffff88800999efb0 RCX=ffff88800999efb8 RDX=ffff8880099a0000 RSI=ffff88800999efb0 RDI=ffff88800999ef28 RBP=dffffc0000000000 RSP=ffff88800999eec8 R8 =0000000000000001 R9 =ffff88800999ef58 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1001333de5 R13=ffffed1001333de4 R14=ffff88800999ef60 R15=ffff88800999ef18 RIP=ffffffff81132fd9 RFL=00000297 [--S-APC] 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 00007f096a09f900 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=00007f096a069008 CR3=0000000015f70000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000