syzkaller login: [ 34.008053] BUG: Bad rss-counter state mm:000000006706ab99 type:MM_FILEPAGES val:33 [ 34.010056] BUG: Bad rss-counter state mm:000000006706ab99 type:MM_ANONPAGES val:22 [ 34.090857] ================================================================== [ 34.096104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.096703] Read of size 8 at addr ffff88800e287ed8 by task sshd/219 [ 34.097195] [ 34.097340] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.097891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.098513] Call Trace: [ 34.098723] [ 34.098911] dump_stack_lvl+0x91/0xf0 [ 34.099235] print_report+0xcc/0x620 [ 34.099556] ? __virt_addr_valid+0x102/0x340 [ 34.103970] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.104377] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.104776] kasan_report+0xbe/0xf0 [ 34.105091] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.105497] vma_interval_tree_remove+0xc75/0xec0 [ 34.105891] vma_prepare+0xc54/0x11a0 [ 34.106206] __split_vma+0x5af/0x950 [ 34.106519] ? __pfx___split_vma+0x10/0x10 [ 34.106865] ? find_held_lock+0x2c/0x110 [ 34.107207] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.107574] ? lock_is_held_type+0x9f/0x120 [ 34.107961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.108356] ? mtree_range_walk+0x632/0x900 [ 34.108716] ? mas_walk+0x5c7/0x7c0 [ 34.109005] do_vmi_munmap+0x1f1/0x2b0 [ 34.109324] mmap_region+0x1f9/0x2660 [ 34.109640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.109976] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.110442] ? __pfx_lock_acquire+0x10/0x10 [ 34.110791] ? __pfx_mmap_region+0x10/0x10 [ 34.111141] ? security_mmap_addr+0x7d/0xa0 [ 34.111492] ? get_unmapped_area+0x1f5/0x3f0 [ 34.119933] do_mmap+0x854/0xf00 [ 34.120233] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.120564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.120933] ksys_mmap_pgoff+0x3af/0x500 [ 34.121265] do_syscall_64+0x3f/0x90 [ 34.121584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.122004] RIP: 0033:0x7f2c218ced82 [ 34.122287] 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 [ 34.123643] RSP: 002b:00007ffc3a1aeb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.124246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c218ced82 [ 34.124792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c20d08000 [ 34.125340] RBP: 00007f2c20d08000 R08: 0000000000000009 R09: 0000000000001000 [ 34.125885] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb0b9c2f60 [ 34.126429] R13: 00007ffc3a1aeb30 R14: 00007ffc3a1aeb60 R15: 00007ffc3a1aeec0 [ 34.126981] [ 34.127174] [ 34.127316] Allocated by task 212: [ 34.127597] kasan_save_stack+0x22/0x50 [ 34.140020] kasan_set_track+0x25/0x30 [ 34.140354] __kasan_slab_alloc+0x59/0x70 [ 34.140698] kmem_cache_alloc+0x16b/0x370 [ 34.141034] vm_area_dup+0x20/0x160 [ 34.141334] __split_vma+0x170/0x950 [ 34.141641] split_vma+0xc6/0x110 [ 34.141927] mprotect_fixup+0x8d2/0xb30 [ 34.142256] do_mprotect_pkey+0x87e/0xd40 [ 34.142599] __x64_sys_mprotect+0x78/0xc0 [ 34.142939] do_syscall_64+0x3f/0x90 [ 34.143253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.147717] [ 34.147865] Freed by task 212: [ 34.148120] kasan_save_stack+0x22/0x50 [ 34.148458] kasan_set_track+0x25/0x30 [ 34.148780] kasan_save_free_info+0x2b/0x50 [ 34.149129] __kasan_slab_free+0x10a/0x190 [ 34.149460] kmem_cache_free+0x10d/0x4d0 [ 34.149789] rcu_core+0x8c8/0x2860 [ 34.150081] __do_softirq+0x1b7/0x7d4 [ 34.150396] [ 34.150539] Last potentially related work creation: [ 34.150917] kasan_save_stack+0x22/0x50 [ 34.151248] __kasan_record_aux_stack+0x8e/0xa0 [ 34.151625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.156277] remove_vma+0x139/0x170 [ 34.156582] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.156945] do_vmi_munmap+0x1f1/0x2b0 [ 34.157266] __vm_munmap+0x138/0x3a0 [ 34.157575] __x64_sys_munmap+0x59/0x80 [ 34.157899] do_syscall_64+0x3f/0x90 [ 34.158213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.158641] [ 34.158783] The buggy address belongs to the object at ffff88800e287e80 [ 34.158783] which belongs to the cache vm_area_struct of size 168 [ 34.159739] The buggy address is located 88 bytes inside of [ 34.159739] freed 168-byte region [ffff88800e287e80, ffff88800e287f28) [ 34.160641] [ 34.160787] The buggy address belongs to the physical page: [ 34.161214] page:0000000075fe1e09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe287 [ 34.161913] memcg:ffff88800e984801 [ 34.162191] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.162610] page_type: 0xffffffff() [ 34.162907] raw: 0100000000000200 ffff88800879fc80 ffffea0000357e80 dead000000000004 [ 34.163500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e984801 [ 34.164889] page dumped because: kasan: bad access detected [ 34.165370] [ 34.165513] Memory state around the buggy address: [ 34.165886] ffff88800e287d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.166463] ffff88800e287e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.167013] >ffff88800e287e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.167627] ^ [ 34.168693] ffff88800e287f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.169331] ffff88800e287f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.169876] ================================================================== [ 34.170986] Disabling lock debugging due to kernel taint [ 38.194518] BUG: Bad rss-counter state mm:000000004a8c5007 type:MM_FILEPAGES val:33 [ 38.195146] BUG: Bad rss-counter state mm:000000004a8c5007 type:MM_ANONPAGES val:22 [ 38.991759] BUG: Bad rss-counter state mm:000000001a66f3c6 type:MM_FILEPAGES val:33 [ 38.992444] BUG: Bad rss-counter state mm:000000001a66f3c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57431' (ECDSA) to the list of known hosts. 2023/06/20 08:10:35 fuzzer started 2023/06/20 08:10:36 dialing manager at localhost:44161 2023/06/20 08:10:36 checking machine... 2023/06/20 08:10:36 checking revisions... [ 39.923753] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:10:36 testing simple program... [ 39.986557] cgroup: Unknown subsys name 'net' [ 40.063930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:10:33 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137d01 RDX=1ffff11002cb1f35 RSI=ffffffff8180c8da RDI=ffff88801658f858 RBP=ffff88801658f8f0 RSP=ffff88801658f850 R8 =ffffffff86137dd6 R9 =ffff88801658f898 R10=0000000000038001 R11=0000000000020f00 R12=ffff88801658f920 R13=0000000000000000 R14=ffff88801005b680 R15=ffff88800965d100 RIP=ffffffff811305d0 RFL=00000202 [-------] 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 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=00007f9468d01330 CR3=0000000005482000 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=2035333a30313a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a30313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8609ca5b RBX=0000000000000001 RCX=ffffffff8609ca56 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c1394b RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8609ca5a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000007117 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130aa4 RFL=00000216 [----AP-] 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 00007f7a934cd900 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=00007fd6ff3ee328 CR3=000000000e5ee000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000