syzkaller login: [ 29.999205] BUG: Bad rss-counter state mm:00000000ad76903e type:MM_FILEPAGES val:33 [ 29.999889] BUG: Bad rss-counter state mm:00000000ad76903e type:MM_ANONPAGES val:22 [ 30.154652] ================================================================== [ 30.155262] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.155873] Read of size 8 at addr ffff88800da136b0 by task sshd/221 [ 30.156377] [ 30.156520] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.159399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.160204] Call Trace: [ 30.160405] [ 30.160624] dump_stack_lvl+0x91/0xf0 [ 30.161249] print_report+0xcc/0x620 [ 30.161990] ? __virt_addr_valid+0x102/0x340 [ 30.162348] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.162730] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.163107] kasan_report+0xbe/0xf0 [ 30.163405] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.163838] vma_interval_tree_remove+0xc75/0xec0 [ 30.164226] vma_prepare+0xc54/0x11a0 [ 30.164540] __split_vma+0x5af/0x950 [ 30.164872] ? __pfx___split_vma+0x10/0x10 [ 30.165315] ? find_held_lock+0x2c/0x110 [ 30.165655] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.166020] ? lock_is_held_type+0x9f/0x120 [ 30.166371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.166765] ? mtree_range_walk+0x632/0x900 [ 30.167120] ? mas_walk+0x5c7/0x7c0 [ 30.167426] do_vmi_munmap+0x1f1/0x2b0 [ 30.167753] mmap_region+0x1f9/0x2660 [ 30.168070] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.168409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.169504] ? __pfx_lock_acquire+0x10/0x10 [ 30.169852] ? __pfx_mmap_region+0x10/0x10 [ 30.170191] ? security_mmap_addr+0x7d/0xa0 [ 30.170532] ? get_unmapped_area+0x1f5/0x3f0 [ 30.170882] do_mmap+0x854/0xf00 [ 30.171163] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.171486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.171877] ksys_mmap_pgoff+0x3af/0x500 [ 30.172210] do_syscall_64+0x3f/0x90 [ 30.172521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.174581] RIP: 0033:0x7fbc9c733d82 [ 30.174881] 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 [ 30.176232] RSP: 002b:00007ffd8a1e6e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.177017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc9c733d82 [ 30.177559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc9bb6d000 [ 30.178198] RBP: 00007fbc9bb6d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.178743] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564369635f70 [ 30.179283] R13: 00007ffd8a1e6e90 R14: 00007ffd8a1e6ec0 R15: 00007ffd8a1e7220 [ 30.179825] [ 30.180017] [ 30.180160] Allocated by task 214: [ 30.180439] kasan_save_stack+0x22/0x50 [ 30.181002] kasan_set_track+0x25/0x30 [ 30.181320] __kasan_slab_alloc+0x59/0x70 [ 30.181670] kmem_cache_alloc+0x16b/0x370 [ 30.182103] vm_area_dup+0x20/0x160 [ 30.182398] __split_vma+0x170/0x950 [ 30.182699] split_vma+0xc6/0x110 [ 30.182986] mprotect_fixup+0x8d2/0xb30 [ 30.183296] do_mprotect_pkey+0x87e/0xd40 [ 30.183634] __x64_sys_mprotect+0x78/0xc0 [ 30.183971] do_syscall_64+0x3f/0x90 [ 30.184277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.184936] [ 30.185079] Freed by task 214: [ 30.185330] kasan_save_stack+0x22/0x50 [ 30.185719] kasan_set_track+0x25/0x30 [ 30.186136] kasan_save_free_info+0x2b/0x50 [ 30.186489] __kasan_slab_free+0x10a/0x190 [ 30.186816] kmem_cache_free+0x10d/0x4d0 [ 30.187130] rcu_core+0x8c8/0x2860 [ 30.187416] __do_softirq+0x1b7/0x7d4 [ 30.187733] [ 30.187876] Last potentially related work creation: [ 30.188251] kasan_save_stack+0x22/0x50 [ 30.188577] __kasan_record_aux_stack+0x8e/0xa0 [ 30.189109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.189531] remove_vma+0x139/0x170 [ 30.189824] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.190273] do_vmi_munmap+0x1f1/0x2b0 [ 30.190586] __vm_munmap+0x138/0x3a0 [ 30.190890] __x64_sys_munmap+0x59/0x80 [ 30.191210] do_syscall_64+0x3f/0x90 [ 30.191516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.191938] [ 30.192077] The buggy address belongs to the object at ffff88800da13658 [ 30.192077] which belongs to the cache vm_area_struct of size 168 [ 30.198856] The buggy address is located 88 bytes inside of [ 30.198856] freed 168-byte region [ffff88800da13658, ffff88800da13700) [ 30.199756] [ 30.199896] The buggy address belongs to the physical page: [ 30.200315] page:00000000fafc0b0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda13 [ 30.201040] memcg:ffff88800d923b01 [ 30.201310] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.201762] page_type: 0xffffffff() [ 30.202051] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393680 dead000000000007 [ 30.202633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d923b01 [ 30.203207] page dumped because: kasan: bad access detected [ 30.203626] [ 30.203764] Memory state around the buggy address: [ 30.204134] ffff88800da13580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.204690] ffff88800da13600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.205348] >ffff88800da13680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.205893] ^ [ 30.206263] ffff88800da13700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.206806] ffff88800da13780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.207345] ================================================================== [ 30.208019] Disabling lock debugging due to kernel taint [ 32.417856] BUG: Bad rss-counter state mm:00000000a28e584f type:MM_FILEPAGES val:33 [ 32.418602] BUG: Bad rss-counter state mm:00000000a28e584f type:MM_ANONPAGES val:22 [ 33.919949] BUG: Bad rss-counter state mm:000000004bd463bd type:MM_FILEPAGES val:33 [ 33.920627] BUG: Bad rss-counter state mm:000000004bd463bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51321' (ECDSA) to the list of known hosts. 2023/06/21 10:23:40 fuzzer started 2023/06/21 10:23:40 dialing manager at localhost:36067 2023/06/21 10:23:40 checking machine... 2023/06/21 10:23:40 checking revisions... [ 34.675335] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:23:40 testing simple program... [ 34.729518] cgroup: Unknown subsys name 'net' [ 34.810976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:23:40 Registers: info registers vcpu 0 RAX=1ffffffff0bc5808 RBX=ffffffff85e2c044 RCX=ffffffff81b25d49 RDX=0000000000000000 RSI=ffffffff8617dec8 RDI=ffffffff85e2c044 RBP=ffffffff85e2c044 RSP=ffff888019876fb0 R8 =ffffffff8617dec8 R9 =ffff8880198770a8 R10=0000000000038001 R11=000000000002c5a0 R12=ffffffff85e2c044 R13=ffffffff85e2c044 R14=ffffffff85e2c044 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000013 [----A-C] 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 00007f0a88349700 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=00007f0a883c4060 CR3=000000000d740000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=c3ee6404f4b721d80000000000132700 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=832176958974f44400000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 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=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 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=00007f468d5ae328 CR3=0000000016d4e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7473207265746e756f632d7373722064 XMM04=61203530203763203030206631206630 XMM05=6666206666203066203030206433203e XMM06=30302039302038622066652039382038 XMM07=00000000000000000000000000000000 XMM08=6c61762053454741504e4f4e415f4d4d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000