syzkaller login: [ 30.888064] BUG: Bad rss-counter state mm:000000000b9fd954 type:MM_FILEPAGES val:33 [ 30.889557] BUG: Bad rss-counter state mm:000000000b9fd954 type:MM_ANONPAGES val:22 [ 31.039791] ================================================================== [ 31.040882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.042141] Read of size 8 at addr ffff88800e1a8d08 by task sshd/220 [ 31.043072] [ 31.043334] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.044391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.045509] Call Trace: [ 31.045861] [ 31.046177] dump_stack_lvl+0x91/0xf0 [ 31.046706] print_report+0xcc/0x620 [ 31.047240] ? __virt_addr_valid+0x102/0x340 [ 31.047839] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049177] kasan_report+0xbe/0xf0 [ 31.049702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050364] vma_interval_tree_remove+0xc75/0xec0 [ 31.051009] vma_prepare+0xc54/0x11a0 [ 31.051529] __split_vma+0x5af/0x950 [ 31.052045] ? __pfx___split_vma+0x10/0x10 [ 31.052614] ? find_held_lock+0x2c/0x110 [ 31.053184] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.053839] ? lock_is_held_type+0x9f/0x120 [ 31.054435] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.055115] ? mtree_range_walk+0x632/0x900 [ 31.055731] ? mas_walk+0x5c7/0x7c0 [ 31.056252] do_vmi_munmap+0x1f1/0x2b0 [ 31.056797] mmap_region+0x1f9/0x2660 [ 31.057329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.057918] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.058718] ? __pfx_lock_acquire+0x10/0x10 [ 31.059308] ? __pfx_mmap_region+0x10/0x10 [ 31.059891] ? security_mmap_addr+0x7d/0xa0 [ 31.060487] ? get_unmapped_area+0x1f5/0x3f0 [ 31.061096] do_mmap+0x854/0xf00 [ 31.061578] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.062174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.062800] ksys_mmap_pgoff+0x3af/0x500 [ 31.063376] do_syscall_64+0x3f/0x90 [ 31.063909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064631] RIP: 0033:0x7f0e60f14d82 [ 31.065146] 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 [ 31.067546] RSP: 002b:00007fff6b924248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.068560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e60f14d82 [ 31.069510] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e6034e000 [ 31.070462] RBP: 00007f0e6034e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.071416] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555974501f60 [ 31.072370] R13: 00007fff6b924260 R14: 00007fff6b924290 R15: 00007fff6b9245f0 [ 31.073337] [ 31.073682] [ 31.073920] Allocated by task 213: [ 31.074401] kasan_save_stack+0x22/0x50 [ 31.074969] kasan_set_track+0x25/0x30 [ 31.075521] __kasan_slab_alloc+0x59/0x70 [ 31.076108] kmem_cache_alloc+0x16b/0x370 [ 31.076684] vm_area_dup+0x20/0x160 [ 31.077190] __split_vma+0x170/0x950 [ 31.077715] split_vma+0xc6/0x110 [ 31.078206] mprotect_fixup+0x8d2/0xb30 [ 31.078765] do_mprotect_pkey+0x87e/0xd40 [ 31.079345] __x64_sys_mprotect+0x78/0xc0 [ 31.079925] do_syscall_64+0x3f/0x90 [ 31.080452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081174] [ 31.081412] Freed by task 213: [ 31.081863] kasan_save_stack+0x22/0x50 [ 31.082427] kasan_set_track+0x25/0x30 [ 31.082981] kasan_save_free_info+0x2b/0x50 [ 31.083657] __kasan_slab_free+0x10a/0x190 [ 31.084256] kmem_cache_free+0x10d/0x4d0 [ 31.084826] rcu_core+0x8c8/0x2860 [ 31.085322] __do_softirq+0x1b7/0x7d4 [ 31.085877] [ 31.086115] Last potentially related work creation: [ 31.086767] kasan_save_stack+0x22/0x50 [ 31.087336] __kasan_record_aux_stack+0x8e/0xa0 [ 31.087976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.088697] remove_vma+0x139/0x170 [ 31.089199] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.089831] do_vmi_munmap+0x1f1/0x2b0 [ 31.090376] __vm_munmap+0x138/0x3a0 [ 31.090902] __x64_sys_munmap+0x59/0x80 [ 31.091463] do_syscall_64+0x3f/0x90 [ 31.091995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.092710] [ 31.092950] The buggy address belongs to the object at ffff88800e1a8cb0 [ 31.092950] which belongs to the cache vm_area_struct of size 168 [ 31.094623] The buggy address is located 88 bytes inside of [ 31.094623] freed 168-byte region [ffff88800e1a8cb0, ffff88800e1a8d58) [ 31.096206] [ 31.096445] The buggy address belongs to the physical page: [ 31.097181] page:00000000ecf858cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a8 [ 31.098413] memcg:ffff88800dd9dc01 [ 31.098892] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.099676] page_type: 0xffffffff() [ 31.100174] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.101210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd9dc01 [ 31.102247] page dumped because: kasan: bad access detected [ 31.102993] [ 31.103232] Memory state around the buggy address: [ 31.103880] ffff88800e1a8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.104846] ffff88800e1a8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.105831] >ffff88800e1a8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.106784] ^ [ 31.107282] ffff88800e1a8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.108260] ffff88800e1a8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.109218] ================================================================== [ 31.110365] Disabling lock debugging due to kernel taint [ 33.381723] BUG: Bad rss-counter state mm:00000000f7b10f53 type:MM_FILEPAGES val:33 [ 33.382980] BUG: Bad rss-counter state mm:00000000f7b10f53 type:MM_ANONPAGES val:22 [ 33.868719] BUG: Bad rss-counter state mm:00000000db7326cf type:MM_FILEPAGES val:33 [ 33.869922] BUG: Bad rss-counter state mm:00000000db7326cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60872' (ECDSA) to the list of known hosts. 2023/06/21 00:04:04 fuzzer started 2023/06/21 00:04:04 dialing manager at localhost:36067 2023/06/21 00:04:04 checking machine... 2023/06/21 00:04:04 checking revisions... [ 34.628422] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:04:05 testing simple program... [ 34.685322] cgroup: Unknown subsys name 'net' [ 34.738386] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:04:04 Registers: info registers vcpu 0 RAX=0000607f92e0c5f8 RBX=0000000000000005 RCX=0000000000000000 RDX=ffffffff81803d9c RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880087b8780 RSP=ffff88801439fa38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800db41d80 R13=0000000000000000 R14=ffff88801439fa90 R15=ffffea0000391980 RIP=ffffffff81803e14 RFL=00000206 [-----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 00007f9638994900 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=00007f5f69cfd650 CR3=000000000d7a2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8e26137f7e41902e00000000000ae988 XMM05=0ed6d742a99cae540000000000131ef8 XMM06=19e9129bd510f2350000000000130db0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe923afff8 CR3=000000000d98c000 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=34303a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303433 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000