syzkaller login: [ 30.636318] BUG: Bad rss-counter state mm:00000000b32e1880 type:MM_FILEPAGES val:33 [ 30.637324] BUG: Bad rss-counter state mm:00000000b32e1880 type:MM_ANONPAGES val:22 [ 30.795858] ================================================================== [ 30.796765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.797709] Read of size 8 at addr ffff88800e81c6b0 by task sshd/222 [ 30.798498] [ 30.798840] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.799724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.800715] Call Trace: [ 30.801053] [ 30.801344] dump_stack_lvl+0x91/0xf0 [ 30.801851] print_report+0xcc/0x620 [ 30.802348] ? __virt_addr_valid+0x102/0x340 [ 30.802912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.803541] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804155] kasan_report+0xbe/0xf0 [ 30.804629] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805249] vma_interval_tree_remove+0xc75/0xec0 [ 30.805866] vma_prepare+0xc54/0x11a0 [ 30.806346] __split_vma+0x5af/0x950 [ 30.806822] ? __pfx___split_vma+0x10/0x10 [ 30.807354] ? find_held_lock+0x2c/0x110 [ 30.807876] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.808445] ? lock_is_held_type+0x9f/0x120 [ 30.808991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.809604] ? mtree_range_walk+0x632/0x900 [ 30.810180] ? mas_walk+0x5c7/0x7c0 [ 30.810655] do_vmi_munmap+0x1f1/0x2b0 [ 30.811157] mmap_region+0x1f9/0x2660 [ 30.811642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.812166] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.812884] ? __pfx_lock_acquire+0x10/0x10 [ 30.813422] ? __pfx_mmap_region+0x10/0x10 [ 30.813966] ? security_mmap_addr+0x7d/0xa0 [ 30.814499] ? get_unmapped_area+0x1f5/0x3f0 [ 30.815059] do_mmap+0x854/0xf00 [ 30.815508] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.816007] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.816567] ksys_mmap_pgoff+0x3af/0x500 [ 30.817072] do_syscall_64+0x3f/0x90 [ 30.817553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818225] RIP: 0033:0x7f1d3937ed82 [ 30.818680] 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 [ 30.820807] RSP: 002b:00007fff9ca67ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.821716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d3937ed82 [ 30.822592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d387b8000 [ 30.823441] RBP: 00007f1d387b8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.824291] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621a415bd90 [ 30.825162] R13: 00007fff9ca67f10 R14: 00007fff9ca67f40 R15: 00007fff9ca682a0 [ 30.826083] [ 30.826384] [ 30.826602] Allocated by task 214: [ 30.827030] kasan_save_stack+0x22/0x50 [ 30.827543] kasan_set_track+0x25/0x30 [ 30.828039] __kasan_slab_alloc+0x59/0x70 [ 30.828571] kmem_cache_alloc+0x16b/0x370 [ 30.829091] vm_area_dup+0x20/0x160 [ 30.829546] __split_vma+0x170/0x950 [ 30.830040] split_vma+0xc6/0x110 [ 30.830478] mprotect_fixup+0x8d2/0xb30 [ 30.830977] do_mprotect_pkey+0x87e/0xd40 [ 30.831512] __x64_sys_mprotect+0x78/0xc0 [ 30.832031] do_syscall_64+0x3f/0x90 [ 30.832512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833156] [ 30.833375] Freed by task 214: [ 30.833782] kasan_save_stack+0x22/0x50 [ 30.834283] kasan_set_track+0x25/0x30 [ 30.834790] kasan_save_free_info+0x2b/0x50 [ 30.835330] __kasan_slab_free+0x10a/0x190 [ 30.835869] kmem_cache_free+0x10d/0x4d0 [ 30.836384] rcu_core+0x8c8/0x2860 [ 30.836821] __do_softirq+0x1b7/0x7d4 [ 30.837297] [ 30.837516] Last potentially related work creation: [ 30.838118] kasan_save_stack+0x22/0x50 [ 30.838614] __kasan_record_aux_stack+0x8e/0xa0 [ 30.839198] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.839913] remove_vma+0x139/0x170 [ 30.840389] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.840964] do_vmi_munmap+0x1f1/0x2b0 [ 30.841469] __vm_munmap+0x138/0x3a0 [ 30.841960] __x64_sys_munmap+0x59/0x80 [ 30.842473] do_syscall_64+0x3f/0x90 [ 30.842964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843633] [ 30.843856] Second to last potentially related work creation: [ 30.844568] kasan_save_stack+0x22/0x50 [ 30.845093] __kasan_record_aux_stack+0x8e/0xa0 [ 30.845691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.846380] remove_vma+0x139/0x170 [ 30.846849] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.847422] do_vmi_munmap+0x1f1/0x2b0 [ 30.847931] mmap_region+0x1f9/0x2660 [ 30.848429] do_mmap+0x854/0xf00 [ 30.848878] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849384] ksys_mmap_pgoff+0x7d/0x500 [ 30.849903] do_syscall_64+0x3f/0x90 [ 30.850392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851067] [ 30.851285] The buggy address belongs to the object at ffff88800e81c658 [ 30.851285] which belongs to the cache vm_area_struct of size 168 [ 30.852821] The buggy address is located 88 bytes inside of [ 30.852821] freed 168-byte region [ffff88800e81c658, ffff88800e81c700) [ 30.854299] [ 30.854525] The buggy address belongs to the physical page: [ 30.855218] page:000000003679daa3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe81c [ 30.856360] memcg:ffff8880097baf01 [ 30.856816] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.857549] page_type: 0xffffffff() [ 30.858032] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.858995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097baf01 [ 30.859938] page dumped because: kasan: bad access detected [ 30.860636] [ 30.860858] Memory state around the buggy address: [ 30.861455] ffff88800e81c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.862352] ffff88800e81c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.863256] >ffff88800e81c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.864143] ^ [ 30.864751] ffff88800e81c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.865639] ffff88800e81c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.866528] ================================================================== [ 30.867475] Disabling lock debugging due to kernel taint [ 32.569076] BUG: Bad rss-counter state mm:0000000026ade2f5 type:MM_FILEPAGES val:33 [ 32.569853] BUG: Bad rss-counter state mm:0000000026ade2f5 type:MM_ANONPAGES val:22 [ 33.059647] BUG: Bad rss-counter state mm:000000008dff21a2 type:MM_FILEPAGES val:33 [ 33.060841] BUG: Bad rss-counter state mm:000000008dff21a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59924' (ECDSA) to the list of known hosts. 2023/06/21 03:23:17 fuzzer started 2023/06/21 03:23:17 dialing manager at localhost:36067 2023/06/21 03:23:17 checking machine... 2023/06/21 03:23:17 checking revisions... [ 33.715398] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:23:17 testing simple program... [ 33.764873] cgroup: Unknown subsys name 'net' [ 33.804910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:23:17 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=00007f2ee735c9f0 CR3=0000000015a06000 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=2036313a33323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81741318 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801bdd7e01 RSI=ffff88801bdd7e18 RDI=ffff88801bdd7e18 RBP=ffff88801bdd70a8 RSP=ffff88801bdd6fd8 R8 =ffffffff8612974c R9 =ffff88801bdd7090 R10=0000000000038001 R11=000000000001e45f R12=ffff88801bdd70b0 R13=ffff88801bdd7098 R14=ffff88801bdd7e20 R15=ffff88801bdd7050 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f4892c54900 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=00007f4892c33020 CR3=000000000e59c000 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