syzkaller login: [ 38.811715] sshd (211) used greatest stack depth: 23992 bytes left [ 38.812400] BUG: Bad rss-counter state mm:00000000e76e5844 type:MM_FILEPAGES val:33 [ 38.813136] BUG: Bad rss-counter state mm:00000000e76e5844 type:MM_ANONPAGES val:22 [ 38.943136] ================================================================== [ 38.943784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.944379] Read of size 8 at addr ffff888010203df0 by task sshd/218 [ 38.944856] [ 38.944995] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.945544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.946134] Call Trace: [ 38.946336] [ 38.946829] dump_stack_lvl+0x91/0xf0 [ 38.947141] print_report+0xcc/0x620 [ 38.947443] ? __virt_addr_valid+0x102/0x340 [ 38.947779] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948183] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948558] kasan_report+0xbe/0xf0 [ 38.948854] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949252] vma_interval_tree_remove+0xc75/0xec0 [ 38.949621] vma_prepare+0xc54/0x11a0 [ 38.949911] __split_vma+0x5af/0x950 [ 38.950195] ? __pfx___split_vma+0x10/0x10 [ 38.950515] ? find_held_lock+0x2c/0x110 [ 38.950832] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.951176] ? lock_is_held_type+0x9f/0x120 [ 38.951503] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.951894] ? mtree_range_walk+0x632/0x900 [ 38.952229] ? mas_walk+0x5c7/0x7c0 [ 38.952521] do_vmi_munmap+0x1f1/0x2b0 [ 38.952827] mmap_region+0x1f9/0x2660 [ 38.953130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.953468] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.953922] ? __pfx_lock_acquire+0x10/0x10 [ 38.954259] ? __pfx_mmap_region+0x10/0x10 [ 38.954598] ? security_mmap_addr+0x7d/0xa0 [ 38.954925] ? get_unmapped_area+0x1f5/0x3f0 [ 38.955259] do_mmap+0x854/0xf00 [ 38.955535] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.955909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.956275] ksys_mmap_pgoff+0x3af/0x500 [ 38.956606] do_syscall_64+0x3f/0x90 [ 38.956916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.957310] RIP: 0033:0x7f103af67d82 [ 38.957585] 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 [ 38.958858] RSP: 002b:00007ffd57def508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.959397] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f103af67d82 [ 38.959923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f103a3a1000 [ 38.960432] RBP: 00007f103a3a1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.960943] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fad989f70 [ 38.961449] R13: 00007ffd57def520 R14: 00007ffd57def550 R15: 00007ffd57def8b0 [ 38.961967] [ 38.962143] [ 38.962272] Allocated by task 211: [ 38.962531] kasan_save_stack+0x22/0x50 [ 38.962873] kasan_set_track+0x25/0x30 [ 38.963289] __kasan_slab_alloc+0x59/0x70 [ 38.963749] kmem_cache_alloc+0x16b/0x370 [ 38.964226] vm_area_dup+0x20/0x160 [ 38.964581] __split_vma+0x170/0x950 [ 38.964965] split_vma+0xc6/0x110 [ 38.965339] mprotect_fixup+0x8d2/0xb30 [ 38.965739] do_mprotect_pkey+0x87e/0xd40 [ 38.966159] __x64_sys_mprotect+0x78/0xc0 [ 38.966512] do_syscall_64+0x3f/0x90 [ 38.966900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.967407] [ 38.967562] Freed by task 202: [ 38.967962] kasan_save_stack+0x22/0x50 [ 38.968436] kasan_set_track+0x25/0x30 [ 38.968850] kasan_save_free_info+0x2b/0x50 [ 38.969305] __kasan_slab_free+0x10a/0x190 [ 38.969738] kmem_cache_free+0x10d/0x4d0 [ 38.970069] rcu_core+0x8c8/0x2860 [ 38.970399] __do_softirq+0x1b7/0x7d4 [ 38.970781] [ 38.970952] Last potentially related work creation: [ 38.971433] kasan_save_stack+0x22/0x50 [ 38.971847] __kasan_record_aux_stack+0x8e/0xa0 [ 38.972247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.972772] remove_vma+0x139/0x170 [ 38.973146] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.973602] do_vmi_munmap+0x1f1/0x2b0 [ 38.974004] __vm_munmap+0x138/0x3a0 [ 38.974336] __x64_sys_munmap+0x59/0x80 [ 38.974696] do_syscall_64+0x3f/0x90 [ 38.975041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.975473] [ 38.975634] The buggy address belongs to the object at ffff888010203d98 [ 38.975634] which belongs to the cache vm_area_struct of size 168 [ 38.976641] The buggy address is located 88 bytes inside of [ 38.976641] freed 168-byte region [ffff888010203d98, ffff888010203e40) [ 38.977526] [ 38.977672] The buggy address belongs to the physical page: [ 38.978071] page:00000000c8f40532 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10203 [ 38.978748] memcg:ffff88801692bf01 [ 38.979021] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.979421] page_type: 0xffffffff() [ 38.979729] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.980332] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801692bf01 [ 38.980897] page dumped because: kasan: bad access detected [ 38.981297] [ 38.981425] Memory state around the buggy address: [ 38.981778] ffff888010203c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.982303] ffff888010203d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.982814] >ffff888010203d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.983327] ^ [ 38.983872] ffff888010203e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.984388] ffff888010203e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.984905] ================================================================== [ 38.985521] Disabling lock debugging due to kernel taint [ 40.996474] BUG: Bad rss-counter state mm:00000000d8c8010f type:MM_FILEPAGES val:33 [ 40.997504] BUG: Bad rss-counter state mm:00000000d8c8010f type:MM_ANONPAGES val:22 [ 41.431932] BUG: Bad rss-counter state mm:00000000aedd1ee4 type:MM_FILEPAGES val:33 [ 41.432582] BUG: Bad rss-counter state mm:00000000aedd1ee4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25610' (ECDSA) to the list of known hosts. 2023/06/21 09:47:38 fuzzer started 2023/06/21 09:47:39 dialing manager at localhost:36067 2023/06/21 09:47:39 checking machine... 2023/06/21 09:47:39 checking revisions... [ 41.967083] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:47:39 testing simple program... [ 41.999413] cgroup: Unknown subsys name 'net' [ 42.052922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:38 Registers: info registers vcpu 0 RAX=0000000000028790 RBX=1ffff1100d9c13b4 RCX=0000000000000000 RDX=ffff88806ce28790 RSI=dffffc0000000000 RDI=ffffffff852c7900 RBP=ffff888008d91b40 RSP=ffff88806ce09d60 R8 =0000000000000001 R9 =1ffffffff0a58f20 R10=ffff888008d91f27 R11=1ffff1100d9c7479 R12=0000000000000083 R13=ffff888008d92450 R14=ffff888008d91b54 R15=ffff88806cf39500 RIP=ffffffff8124d545 RFL=00000086 [--S--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 00007f6cd064e900 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=00007ffed9a63000 CR3=000000000cbe4000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f832d6a8d50 CR3=000000001395e000 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=c74fb055cd61faa63644d47108c54b31 XMM02=ec2efd57dc4c00df000000000011bda0 XMM03=0778b93e6131e8e6000000000011be70 XMM04=eab5fe3f87f5c46600000000000ae988 XMM05=751b9502027dc0b90000000000131da8 XMM06=0cbf695612e52c890000000000130f80 XMM07=e042d86d42eb936e0000000000122310 XMM08=0778b93e6131e8e6000000000011be70 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000