syzkaller login: [ 23.956671] BUG: Bad rss-counter state mm:000000005dba3883 type:MM_FILEPAGES val:33 [ 23.957391] BUG: Bad rss-counter state mm:000000005dba3883 type:MM_ANONPAGES val:22 [ 24.098395] ================================================================== [ 24.099121] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.099847] Read of size 8 at addr ffff88800ebe4c20 by task sshd/220 [ 24.100429] [ 24.100606] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.101265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.102008] Call Trace: [ 24.102250] [ 24.102550] dump_stack_lvl+0x91/0xf0 [ 24.102950] print_report+0xcc/0x620 [ 24.103328] ? __virt_addr_valid+0x102/0x340 [ 24.103748] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.104218] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.104699] kasan_report+0xbe/0xf0 [ 24.105066] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.105541] vma_interval_tree_remove+0xc75/0xec0 [ 24.106006] vma_prepare+0xc54/0x11a0 [ 24.106377] __split_vma+0x5af/0x950 [ 24.106768] ? __pfx___split_vma+0x10/0x10 [ 24.107176] ? find_held_lock+0x2c/0x110 [ 24.107577] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.108001] ? lock_is_held_type+0x9f/0x120 [ 24.108427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.108880] ? mtree_range_walk+0x632/0x900 [ 24.109303] ? mas_walk+0x5c7/0x7c0 [ 24.109675] do_vmi_munmap+0x1f1/0x2b0 [ 24.110044] mmap_region+0x1f9/0x2660 [ 24.110431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.110857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.111402] ? __pfx_lock_acquire+0x10/0x10 [ 24.111817] ? __pfx_mmap_region+0x10/0x10 [ 24.112208] ? security_mmap_addr+0x7d/0xa0 [ 24.112612] ? get_unmapped_area+0x1f5/0x3f0 [ 24.113040] do_mmap+0x854/0xf00 [ 24.113389] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.113775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.114202] ksys_mmap_pgoff+0x3af/0x500 [ 24.114582] do_syscall_64+0x3f/0x90 [ 24.114971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115463] RIP: 0033:0x7f6a35e82d82 [ 24.115818] 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 [ 24.117420] RSP: 002b:00007ffe7eb55ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.118080] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a35e82d82 [ 24.118700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a352bc000 [ 24.119352] RBP: 00007f6a352bc000 R08: 0000000000000009 R09: 0000000000001000 [ 24.119976] R10: 0000000000000812 R11: 0000000000000206 R12: 000055873e358f60 [ 24.120609] R13: 00007ffe7eb55ee0 R14: 00007ffe7eb55f10 R15: 00007ffe7eb56270 [ 24.121259] [ 24.121476] [ 24.121638] Allocated by task 213: [ 24.121961] kasan_save_stack+0x22/0x50 [ 24.122348] kasan_set_track+0x25/0x30 [ 24.122724] __kasan_slab_alloc+0x59/0x70 [ 24.123134] kmem_cache_alloc+0x16b/0x370 [ 24.123510] vm_area_dup+0x20/0x160 [ 24.123838] __split_vma+0x170/0x950 [ 24.124176] split_vma+0xc6/0x110 [ 24.124505] mprotect_fixup+0x8d2/0xb30 [ 24.124889] do_mprotect_pkey+0x87e/0xd40 [ 24.125267] __x64_sys_mprotect+0x78/0xc0 [ 24.125672] do_syscall_64+0x3f/0x90 [ 24.126033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.126529] [ 24.126690] Freed by task 213: [ 24.127010] kasan_save_stack+0x22/0x50 [ 24.127387] kasan_set_track+0x25/0x30 [ 24.127751] kasan_save_free_info+0x2b/0x50 [ 24.128139] __kasan_slab_free+0x10a/0x190 [ 24.128535] kmem_cache_free+0x10d/0x4d0 [ 24.128903] rcu_core+0x8c8/0x2860 [ 24.129235] __do_softirq+0x1b7/0x7d4 [ 24.129590] [ 24.129748] Last potentially related work creation: [ 24.130186] kasan_save_stack+0x22/0x50 [ 24.130569] __kasan_record_aux_stack+0x8e/0xa0 [ 24.131120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.131605] remove_vma+0x139/0x170 [ 24.131950] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.132377] do_vmi_munmap+0x1f1/0x2b0 [ 24.132754] __vm_munmap+0x138/0x3a0 [ 24.133112] __x64_sys_munmap+0x59/0x80 [ 24.133494] do_syscall_64+0x3f/0x90 [ 24.133853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.134351] [ 24.134518] The buggy address belongs to the object at ffff88800ebe4bc8 [ 24.134518] which belongs to the cache vm_area_struct of size 168 [ 24.135647] The buggy address is located 88 bytes inside of [ 24.135647] freed 168-byte region [ffff88800ebe4bc8, ffff88800ebe4c70) [ 24.136710] [ 24.136881] The buggy address belongs to the physical page: [ 24.137383] page:00000000329d04a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebe4 [ 24.138194] memcg:ffff88800eb7c401 [ 24.138507] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.139022] page_type: 0xffffffff() [ 24.139370] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.140055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb7c401 [ 24.140735] page dumped because: kasan: bad access detected [ 24.141227] [ 24.141392] Memory state around the buggy address: [ 24.141814] ffff88800ebe4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.142468] ffff88800ebe4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.143133] >ffff88800ebe4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.143778] ^ [ 24.144174] ffff88800ebe4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.144817] ffff88800ebe4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.145469] ================================================================== [ 24.146267] Disabling lock debugging due to kernel taint [ 25.627148] BUG: Bad rss-counter state mm:000000006572f837 type:MM_FILEPAGES val:33 [ 25.628227] BUG: Bad rss-counter state mm:000000006572f837 type:MM_ANONPAGES val:22 [ 25.990621] BUG: Bad rss-counter state mm:0000000012dc7f79 type:MM_FILEPAGES val:33 [ 25.991359] BUG: Bad rss-counter state mm:0000000012dc7f79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53079' (ECDSA) to the list of known hosts. 2023/06/21 08:11:21 fuzzer started 2023/06/21 08:11:22 dialing manager at localhost:36067 2023/06/21 08:11:22 checking machine... 2023/06/21 08:11:22 checking revisions... [ 26.596019] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:11:22 testing simple program... [ 26.637161] cgroup: Unknown subsys name 'net' [ 26.679147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:11:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801467b680 RSI=ffffffff83ab1b07 RDI=ffffffff87f9768c RBP=0000000000000000 RSP=ffff88801c6e7500 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=0000085c0000085c R12=0000000000000000 R13=0000000000000056 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c089b 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 00007fa719ebb900 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=00007fa71a472618 CR3=000000001c4d2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007fbd25001338 CR3=000000000c5ec000 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=2031323a31313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a31313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000