syzkaller login: [ 33.086943] BUG: Bad rss-counter state mm:000000005b714be0 type:MM_FILEPAGES val:33 [ 33.088291] BUG: Bad rss-counter state mm:000000005b714be0 type:MM_ANONPAGES val:22 [ 33.176407] ================================================================== [ 33.177123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.177862] Read of size 8 at addr ffff888019e864e0 by task sshd/221 [ 33.178487] [ 33.178671] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.179332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.180090] Call Trace: [ 33.180339] [ 33.180659] dump_stack_lvl+0x91/0xf0 [ 33.181040] print_report+0xcc/0x620 [ 33.181416] ? __virt_addr_valid+0x102/0x340 [ 33.181846] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.182344] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.182839] kasan_report+0xbe/0xf0 [ 33.183207] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.183696] vma_interval_tree_remove+0xc75/0xec0 [ 33.184157] vma_prepare+0xc54/0x11a0 [ 33.184536] __split_vma+0x5af/0x950 [ 33.184908] ? __pfx___split_vma+0x10/0x10 [ 33.185312] ? find_held_lock+0x2c/0x110 [ 33.185746] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.186220] ? lock_is_held_type+0x9f/0x120 [ 33.186635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.186987] ? mtree_range_walk+0x632/0x900 [ 33.187299] ? mas_walk+0x5c7/0x7c0 [ 33.187577] do_vmi_munmap+0x1f1/0x2b0 [ 33.187864] mmap_region+0x1f9/0x2660 [ 33.188142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.188437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.188867] ? __pfx_lock_acquire+0x10/0x10 [ 33.189174] ? __pfx_mmap_region+0x10/0x10 [ 33.189484] ? security_mmap_addr+0x7d/0xa0 [ 33.189793] ? get_unmapped_area+0x1f5/0x3f0 [ 33.190115] do_mmap+0x854/0xf00 [ 33.190363] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.190658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.190983] ksys_mmap_pgoff+0x3af/0x500 [ 33.191273] do_syscall_64+0x3f/0x90 [ 33.191551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.191933] RIP: 0033:0x7f36a5fe8d82 [ 33.192198] 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 [ 33.193442] RSP: 002b:00007ffd98cfd648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.193982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36a5fe8d82 [ 33.194484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36a5422000 [ 33.194986] RBP: 00007f36a5422000 R08: 0000000000000009 R09: 0000000000001000 [ 33.195492] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d88779bb20 [ 33.195981] R13: 00007ffd98cfd660 R14: 00007ffd98cfd690 R15: 00007ffd98cfd9f0 [ 33.196493] [ 33.196661] [ 33.196783] Allocated by task 214: [ 33.197033] kasan_save_stack+0x22/0x50 [ 33.197328] kasan_set_track+0x25/0x30 [ 33.197618] __kasan_slab_alloc+0x59/0x70 [ 33.197943] kmem_cache_alloc+0x16b/0x370 [ 33.198240] vm_area_dup+0x20/0x160 [ 33.198515] __split_vma+0x170/0x950 [ 33.198784] split_vma+0xc6/0x110 [ 33.199037] mprotect_fixup+0x8d2/0xb30 [ 33.199331] do_mprotect_pkey+0x87e/0xd40 [ 33.199634] __x64_sys_mprotect+0x78/0xc0 [ 33.199935] do_syscall_64+0x3f/0x90 [ 33.200202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.200580] [ 33.200704] Freed by task 214: [ 33.200935] kasan_save_stack+0x22/0x50 [ 33.201228] kasan_set_track+0x25/0x30 [ 33.201516] kasan_save_free_info+0x2b/0x50 [ 33.201822] __kasan_slab_free+0x10a/0x190 [ 33.202132] kmem_cache_free+0x10d/0x4d0 [ 33.202423] rcu_core+0x8c8/0x2860 [ 33.202698] __do_softirq+0x1b7/0x7d4 [ 33.202973] [ 33.203096] Last potentially related work creation: [ 33.203438] kasan_save_stack+0x22/0x50 [ 33.203735] __kasan_record_aux_stack+0x8e/0xa0 [ 33.204068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.204436] remove_vma+0x139/0x170 [ 33.204701] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.205030] do_vmi_munmap+0x1f1/0x2b0 [ 33.205314] __vm_munmap+0x138/0x3a0 [ 33.205585] __x64_sys_munmap+0x59/0x80 [ 33.205877] do_syscall_64+0x3f/0x90 [ 33.206140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.206510] [ 33.206626] The buggy address belongs to the object at ffff888019e86488 [ 33.206626] which belongs to the cache vm_area_struct of size 168 [ 33.207420] The buggy address is located 88 bytes inside of [ 33.207420] freed 168-byte region [ffff888019e86488, ffff888019e86530) [ 33.208194] [ 33.208313] The buggy address belongs to the physical page: [ 33.208677] page:00000000b4354155 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e86 [ 33.209273] memcg:ffff888019d8f801 [ 33.209515] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.209870] page_type: 0xffffffff() [ 33.210128] raw: 0100000000000200 ffff88800879fc80 ffffea0000373e80 000000000000000e [ 33.210634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d8f801 [ 33.211124] page dumped because: kasan: bad access detected [ 33.211493] [ 33.211612] Memory state around the buggy address: [ 33.211926] ffff888019e86380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.212397] ffff888019e86400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.212877] >ffff888019e86480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.213347] ^ [ 33.213767] ffff888019e86500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 33.214237] ffff888019e86580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.214705] ================================================================== [ 33.215227] Disabling lock debugging due to kernel taint [ 35.123928] BUG: Bad rss-counter state mm:00000000c85372f3 type:MM_FILEPAGES val:33 [ 35.125760] BUG: Bad rss-counter state mm:00000000c85372f3 type:MM_ANONPAGES val:22 [ 35.583538] BUG: Bad rss-counter state mm:00000000e9c2e87a type:MM_FILEPAGES val:33 [ 35.585120] BUG: Bad rss-counter state mm:00000000e9c2e87a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39295' (ECDSA) to the list of known hosts. 2023/06/19 19:30:40 fuzzer started 2023/06/19 19:30:40 dialing manager at localhost:44161 2023/06/19 19:30:40 checking machine... 2023/06/19 19:30:40 checking revisions... [ 36.294535] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:30:40 testing simple program... [ 36.348769] cgroup: Unknown subsys name 'net' [ 36.394463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:37 Registers: info registers vcpu 0 RAX=00000000000000ca RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000ca RDI=ffffffff84506c5a RBP=ffff8880146f7f58 RSP=ffff8880146f7f20 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000000000ca R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534434 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 00007f1262daf700 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=00007f386ab340b0 CR3=000000000dc0c000 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=30333a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fe7cc2c3b40 CR3=000000001026e000 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=663d4ec12c644ea2964ddcee1162ed1f XMM02=ec2efd57dc4c00df00000000001200c8 XMM03=f3fc644eec5722e50000000000120198 XMM04=3a436bca9baf549800000000000ae988 XMM05=e4cb8bb95a7664b600000000001344d0 XMM06=7b45584eb63bb4f30000000000133318 XMM07=e042d86d42eb936e0000000000124b20 XMM08=f3fc644eec5722e50000000000120198 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000