syzkaller login: [ 32.173423] BUG: Bad rss-counter state mm:00000000739d8264 type:MM_FILEPAGES val:33 [ 32.174591] BUG: Bad rss-counter state mm:00000000739d8264 type:MM_ANONPAGES val:22 [ 32.211553] ================================================================== [ 32.212472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.213412] Read of size 8 at addr ffff88800fe02058 by task sshd/219 [ 32.214183] [ 32.214397] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.215268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.216247] Call Trace: [ 32.216571] [ 32.216851] dump_stack_lvl+0x91/0xf0 [ 32.217345] print_report+0xcc/0x620 [ 32.217826] ? __virt_addr_valid+0x102/0x340 [ 32.218379] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.218992] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.219609] kasan_report+0xbe/0xf0 [ 32.220110] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.220732] vma_interval_tree_remove+0xc75/0xec0 [ 32.221330] vma_prepare+0xc54/0x11a0 [ 32.221804] __split_vma+0x5af/0x950 [ 32.222275] ? __pfx___split_vma+0x10/0x10 [ 32.222808] ? find_held_lock+0x2c/0x110 [ 32.223325] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.223893] ? lock_is_held_type+0x9f/0x120 [ 32.224428] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.225031] ? mtree_range_walk+0x632/0x900 [ 32.225580] ? mas_walk+0x5c7/0x7c0 [ 32.226047] do_vmi_munmap+0x1f1/0x2b0 [ 32.226540] mmap_region+0x1f9/0x2660 [ 32.227021] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.227525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.228249] ? __pfx_lock_acquire+0x10/0x10 [ 32.228781] ? __pfx_mmap_region+0x10/0x10 [ 32.229316] ? security_mmap_addr+0x7d/0xa0 [ 32.229848] ? get_unmapped_area+0x1f5/0x3f0 [ 32.230398] do_mmap+0x854/0xf00 [ 32.230830] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.231324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.231898] ksys_mmap_pgoff+0x3af/0x500 [ 32.232403] do_syscall_64+0x3f/0x90 [ 32.232886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.233529] RIP: 0033:0x7f2f2e854d82 [ 32.233982] 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 [ 32.236120] RSP: 002b:00007ffe1fd01ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.237023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f2e854d82 [ 32.237871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f2dc8e000 [ 32.238723] RBP: 00007f2f2dc8e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.239662] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c6690ff70 [ 32.240528] R13: 00007ffe1fd01b00 R14: 00007ffe1fd01b30 R15: 00007ffe1fd01e90 [ 32.241386] [ 32.241677] [ 32.241890] Allocated by task 212: [ 32.242319] kasan_save_stack+0x22/0x50 [ 32.242821] kasan_set_track+0x25/0x30 [ 32.243313] __kasan_slab_alloc+0x59/0x70 [ 32.243847] kmem_cache_alloc+0x16b/0x370 [ 32.244363] vm_area_dup+0x20/0x160 [ 32.244818] __split_vma+0x170/0x950 [ 32.245286] split_vma+0xc6/0x110 [ 32.245718] mprotect_fixup+0x8d2/0xb30 [ 32.246224] do_mprotect_pkey+0x87e/0xd40 [ 32.246739] __x64_sys_mprotect+0x78/0xc0 [ 32.247254] do_syscall_64+0x3f/0x90 [ 32.247725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.248382] [ 32.248596] Freed by task 202: [ 32.248989] kasan_save_stack+0x22/0x50 [ 32.249487] kasan_set_track+0x25/0x30 [ 32.249976] kasan_save_free_info+0x2b/0x50 [ 32.250502] __kasan_slab_free+0x10a/0x190 [ 32.251029] kmem_cache_free+0x10d/0x4d0 [ 32.251533] rcu_core+0x8c8/0x2860 [ 32.251992] __do_softirq+0x1b7/0x7d4 [ 32.252472] [ 32.252684] Last potentially related work creation: [ 32.253274] kasan_save_stack+0x22/0x50 [ 32.253772] __kasan_record_aux_stack+0x8e/0xa0 [ 32.254343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.254985] remove_vma+0x139/0x170 [ 32.255431] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.255987] do_vmi_munmap+0x1f1/0x2b0 [ 32.256473] __vm_munmap+0x138/0x3a0 [ 32.256944] __x64_sys_munmap+0x59/0x80 [ 32.257440] do_syscall_64+0x3f/0x90 [ 32.257909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.258552] [ 32.258767] The buggy address belongs to the object at ffff88800fe02000 [ 32.258767] which belongs to the cache vm_area_struct of size 168 [ 32.260243] The buggy address is located 88 bytes inside of [ 32.260243] freed 168-byte region [ffff88800fe02000, ffff88800fe020a8) [ 32.261650] [ 32.261867] The buggy address belongs to the physical page: [ 32.262520] page:000000002a36248c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe02 [ 32.263590] memcg:ffff88800dc7a501 [ 32.264017] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.264664] page_type: 0xffffffff() [ 32.265114] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.266020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc7a501 [ 32.266912] page dumped because: kasan: bad access detected [ 32.267563] [ 32.267776] Memory state around the buggy address: [ 32.268363] ffff88800fe01f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 32.269218] ffff88800fe01f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.270081] >ffff88800fe02000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.270925] ^ [ 32.271646] ffff88800fe02080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.272503] ffff88800fe02100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.273348] ================================================================== [ 32.274343] Disabling lock debugging due to kernel taint [ 34.286980] BUG: Bad rss-counter state mm:00000000794437cc type:MM_FILEPAGES val:33 [ 34.288055] BUG: Bad rss-counter state mm:00000000794437cc type:MM_ANONPAGES val:22 [ 34.728135] BUG: Bad rss-counter state mm:00000000d667ebb2 type:MM_FILEPAGES val:33 [ 34.729292] BUG: Bad rss-counter state mm:00000000d667ebb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31369' (ECDSA) to the list of known hosts. 2023/06/19 12:23:25 fuzzer started 2023/06/19 12:23:25 dialing manager at localhost:44161 2023/06/19 12:23:25 checking machine... 2023/06/19 12:23:25 checking revisions... [ 35.434508] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:23:25 testing simple program... [ 35.482487] cgroup: Unknown subsys name 'net' [ 35.519609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:23:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab4224 RDI=ffff888015c61f34 RBP=ffff888015c61b40 RSP=ffff8880168574d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a5a00000a5a R12=ffff888015c61b40 R13=00000000000000e4 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff813744d5 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 00007f2993490900 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=00007ffe2f6a9000 CR3=000000000c4ae000 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=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=1ffff1100d9e137e RBX=0000000000000004 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88806cf09bf0 RBP=dffffc0000000000 RSP=ffff88806cf09b40 R8 =ffffffff860723cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000010 R13=0000000000000000 R14=ffff88806cf09bd0 R15=ffff88800ec71540 RIP=ffffffff813ad5ca 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=00007efddd376a80 CR3=000000000f0be000 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=2034323a33323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a33323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000