syzkaller login: [ 41.569194] BUG: Bad rss-counter state mm:00000000733d23b2 type:MM_FILEPAGES val:33 [ 41.570418] BUG: Bad rss-counter state mm:00000000733d23b2 type:MM_ANONPAGES val:22 [ 41.623102] ================================================================== [ 41.624511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.625989] Read of size 8 at addr ffff88800c6d9310 by task sshd/221 [ 41.627305] [ 41.627640] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.629049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.630534] Call Trace: [ 41.631074] [ 41.631518] dump_stack_lvl+0x91/0xf0 [ 41.632091] print_report+0xcc/0x620 [ 41.632684] ? __virt_addr_valid+0x102/0x340 [ 41.633324] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.634049] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.634798] kasan_report+0xbe/0xf0 [ 41.635344] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.636075] vma_interval_tree_remove+0xc75/0xec0 [ 41.636782] vma_prepare+0xc54/0x11a0 [ 41.637339] __split_vma+0x5af/0x950 [ 41.637902] ? __pfx___split_vma+0x10/0x10 [ 41.638549] ? find_held_lock+0x2c/0x110 [ 41.639145] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.639821] ? lock_is_held_type+0x9f/0x120 [ 41.640459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.641166] ? mtree_range_walk+0x632/0x900 [ 41.641782] ? mas_walk+0x5c7/0x7c0 [ 41.642319] do_vmi_munmap+0x1f1/0x2b0 [ 41.642897] mmap_region+0x1f9/0x2660 [ 41.643447] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.644014] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.644809] ? __pfx_lock_acquire+0x10/0x10 [ 41.645396] ? __pfx_mmap_region+0x10/0x10 [ 41.645982] ? security_mmap_addr+0x7d/0xa0 [ 41.646600] ? get_unmapped_area+0x1f5/0x3f0 [ 41.647210] do_mmap+0x854/0xf00 [ 41.647716] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.648266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.648897] ksys_mmap_pgoff+0x3af/0x500 [ 41.649470] do_syscall_64+0x3f/0x90 [ 41.649990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.650774] RIP: 0033:0x7effa649dd82 [ 41.651307] 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 [ 41.653829] RSP: 002b:00007ffe9da337e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.654896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effa649dd82 [ 41.655888] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effa58d7000 [ 41.656891] RBP: 00007effa58d7000 R08: 0000000000000009 R09: 0000000000001000 [ 41.657896] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f295d0b20 [ 41.658901] R13: 00007ffe9da33800 R14: 00007ffe9da33830 R15: 00007ffe9da33b90 [ 41.659879] [ 41.660200] [ 41.660447] Allocated by task 214: [ 41.660918] kasan_save_stack+0x22/0x50 [ 41.661489] kasan_set_track+0x25/0x30 [ 41.662022] __kasan_slab_alloc+0x59/0x70 [ 41.662651] kmem_cache_alloc+0x16b/0x370 [ 41.663223] vm_area_dup+0x20/0x160 [ 41.663734] __split_vma+0x170/0x950 [ 41.664246] split_vma+0xc6/0x110 [ 41.664745] mprotect_fixup+0x8d2/0xb30 [ 41.665306] do_mprotect_pkey+0x87e/0xd40 [ 41.665894] __x64_sys_mprotect+0x78/0xc0 [ 41.666494] do_syscall_64+0x3f/0x90 [ 41.667015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.667890] [ 41.668168] Freed by task 214: [ 41.668617] kasan_save_stack+0x22/0x50 [ 41.669176] kasan_set_track+0x25/0x30 [ 41.669730] kasan_save_free_info+0x2b/0x50 [ 41.670335] __kasan_slab_free+0x10a/0x190 [ 41.670936] kmem_cache_free+0x10d/0x4d0 [ 41.671510] rcu_core+0x8c8/0x2860 [ 41.672002] __do_softirq+0x1b7/0x7d4 [ 41.672560] [ 41.672798] Last potentially related work creation: [ 41.673470] kasan_save_stack+0x22/0x50 [ 41.674029] __kasan_record_aux_stack+0x8e/0xa0 [ 41.674686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.675379] remove_vma+0x139/0x170 [ 41.675890] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.676520] do_vmi_munmap+0x1f1/0x2b0 [ 41.677060] __vm_munmap+0x138/0x3a0 [ 41.677608] __x64_sys_munmap+0x59/0x80 [ 41.678176] do_syscall_64+0x3f/0x90 [ 41.678739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.679485] [ 41.679734] The buggy address belongs to the object at ffff88800c6d92b8 [ 41.679734] which belongs to the cache vm_area_struct of size 168 [ 41.681460] The buggy address is located 88 bytes inside of [ 41.681460] freed 168-byte region [ffff88800c6d92b8, ffff88800c6d9360) [ 41.683129] [ 41.683381] The buggy address belongs to the physical page: [ 41.684158] page:00000000cd770a1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d9 [ 41.685434] memcg:ffff88801693b201 [ 41.685924] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.686684] page_type: 0xffffffff() [ 41.687178] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.688225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801693b201 [ 41.689246] page dumped because: kasan: bad access detected [ 41.689976] [ 41.690235] Memory state around the buggy address: [ 41.690896] ffff88800c6d9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 41.691851] ffff88800c6d9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.692824] >ffff88800c6d9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.693773] ^ [ 41.694298] ffff88800c6d9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.695251] ffff88800c6d9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.696257] ================================================================== [ 41.697470] Disabling lock debugging due to kernel taint [ 43.920953] BUG: Bad rss-counter state mm:0000000048f64b3b type:MM_FILEPAGES val:33 [ 43.922320] BUG: Bad rss-counter state mm:0000000048f64b3b type:MM_ANONPAGES val:22 [ 44.467947] BUG: Bad rss-counter state mm:00000000db6202b5 type:MM_FILEPAGES val:33 [ 44.469178] BUG: Bad rss-counter state mm:00000000db6202b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42516' (ECDSA) to the list of known hosts. 2023/06/19 14:25:45 fuzzer started 2023/06/19 14:25:45 dialing manager at localhost:44161 2023/06/19 14:25:45 checking machine... 2023/06/19 14:25:45 checking revisions... [ 45.069175] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:25:45 testing simple program... [ 45.099883] cgroup: Unknown subsys name 'net' [ 45.132237] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:25:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d2ab600 RCX=0000000000000000 RDX=ffff8880145d51c0 RSI=ffffffff8199bfc4 RDI=0000000000000005 RBP=ffff88800ddf1b50 RSP=ffff8880146cf938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800d655800 R13=0000000000000000 R14=0000000000000000 R15=ffff88800d655940 RIP=ffffffff814c081b RFL=00000046 [---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 00007faa92b9d900 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=00007faa93152650 CR3=000000000cb74000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fe576270820 CR3=0000000013aa2000 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=711cb6578c1b42bb0840ab2a5f9b69a7 XMM02=ec2efd57dc4c00df000000000011d648 XMM03=00fec8728b02ed60000000000011d718 XMM04=19aa050f6edbdeab00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133c18 XMM06=869d1f9fabe758490000000000132a80 XMM07=e042d86d42eb936e0000000000124310 XMM08=00fec8728b02ed60000000000011d718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000