syzkaller login: [ 32.812305] BUG: Bad rss-counter state mm:00000000640d1141 type:MM_FILEPAGES val:33 [ 32.813797] BUG: Bad rss-counter state mm:00000000640d1141 type:MM_ANONPAGES val:22 [ 32.967433] ================================================================== [ 32.968368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.969334] Read of size 8 at addr ffff888018f1e798 by task sshd/220 [ 32.970148] [ 32.970460] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.971350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.972377] Call Trace: [ 32.972724] [ 32.973013] dump_stack_lvl+0x91/0xf0 [ 32.973519] print_report+0xcc/0x620 [ 32.974034] ? __virt_addr_valid+0x102/0x340 [ 32.974602] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.975233] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.975868] kasan_report+0xbe/0xf0 [ 32.976354] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.976993] vma_interval_tree_remove+0xc75/0xec0 [ 32.977612] vma_prepare+0xc54/0x11a0 [ 32.978108] __split_vma+0x5af/0x950 [ 32.978589] ? __pfx___split_vma+0x10/0x10 [ 32.979135] ? find_held_lock+0x2c/0x110 [ 32.979672] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.980250] ? lock_is_held_type+0x9f/0x120 [ 32.980794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.981402] ? mtree_range_walk+0x632/0x900 [ 32.981962] ? mas_walk+0x5c7/0x7c0 [ 32.982441] do_vmi_munmap+0x1f1/0x2b0 [ 32.982935] mmap_region+0x1f9/0x2660 [ 32.983432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.983952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.984712] ? __pfx_lock_acquire+0x10/0x10 [ 32.985249] ? __pfx_mmap_region+0x10/0x10 [ 32.985817] ? security_mmap_addr+0x7d/0xa0 [ 32.986352] ? get_unmapped_area+0x1f5/0x3f0 [ 32.986903] do_mmap+0x854/0xf00 [ 32.987351] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.987876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.988441] ksys_mmap_pgoff+0x3af/0x500 [ 32.988960] do_syscall_64+0x3f/0x90 [ 32.989446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.990101] RIP: 0033:0x7f149c0fbd82 [ 32.990558] 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 [ 32.992699] RSP: 002b:00007ffd905e9318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.993603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f149c0fbd82 [ 32.994487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f149b535000 [ 32.995343] RBP: 00007f149b535000 R08: 0000000000000009 R09: 0000000000001000 [ 32.996179] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f3b1a4f70 [ 32.997035] R13: 00007ffd905e9330 R14: 00007ffd905e9360 R15: 00007ffd905e96c0 [ 32.997909] [ 32.998213] [ 32.998429] Allocated by task 213: [ 32.998860] kasan_save_stack+0x22/0x50 [ 32.999366] kasan_set_track+0x25/0x30 [ 32.999874] __kasan_slab_alloc+0x59/0x70 [ 33.000414] kmem_cache_alloc+0x16b/0x370 [ 33.000936] vm_area_dup+0x20/0x160 [ 33.001396] __split_vma+0x170/0x950 [ 33.001889] split_vma+0xc6/0x110 [ 33.002332] mprotect_fixup+0x8d2/0xb30 [ 33.002850] do_mprotect_pkey+0x87e/0xd40 [ 33.003377] __x64_sys_mprotect+0x78/0xc0 [ 33.003915] do_syscall_64+0x3f/0x90 [ 33.004396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.005057] [ 33.005273] Freed by task 213: [ 33.005679] kasan_save_stack+0x22/0x50 [ 33.006189] kasan_set_track+0x25/0x30 [ 33.006706] kasan_save_free_info+0x2b/0x50 [ 33.007276] __kasan_slab_free+0x10a/0x190 [ 33.007828] kmem_cache_free+0x10d/0x4d0 [ 33.008368] rcu_core+0x8c8/0x2860 [ 33.008832] __do_softirq+0x1b7/0x7d4 [ 33.009329] [ 33.009553] Last potentially related work creation: [ 33.010189] kasan_save_stack+0x22/0x50 [ 33.010721] __kasan_record_aux_stack+0x8e/0xa0 [ 33.011337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.012011] remove_vma+0x139/0x170 [ 33.012490] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.013085] do_vmi_munmap+0x1f1/0x2b0 [ 33.013597] __vm_munmap+0x138/0x3a0 [ 33.014106] __x64_sys_munmap+0x59/0x80 [ 33.014622] do_syscall_64+0x3f/0x90 [ 33.015118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.015797] [ 33.016022] Second to last potentially related work creation: [ 33.016748] kasan_save_stack+0x22/0x50 [ 33.017300] __kasan_record_aux_stack+0x8e/0xa0 [ 33.017921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.018605] remove_vma+0x139/0x170 [ 33.019090] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.019669] do_vmi_munmap+0x1f1/0x2b0 [ 33.020175] __vm_munmap+0x138/0x3a0 [ 33.020668] __x64_sys_munmap+0x59/0x80 [ 33.021194] do_syscall_64+0x3f/0x90 [ 33.021701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.022383] [ 33.022609] The buggy address belongs to the object at ffff888018f1e740 [ 33.022609] which belongs to the cache vm_area_struct of size 168 [ 33.024173] The buggy address is located 88 bytes inside of [ 33.024173] freed 168-byte region [ffff888018f1e740, ffff888018f1e7e8) [ 33.025700] [ 33.025933] The buggy address belongs to the physical page: [ 33.026636] page:000000003672ea8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f1e [ 33.027807] memcg:ffff88800fe6c501 [ 33.028253] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.028935] page_type: 0xffffffff() [ 33.029417] raw: 0100000000000200 ffff88800879fc80 ffffea000063c600 dead000000000008 [ 33.030397] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe6c501 [ 33.031358] page dumped because: kasan: bad access detected [ 33.032057] [ 33.032285] Memory state around the buggy address: [ 33.032899] ffff888018f1e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.033827] ffff888018f1e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.034744] >ffff888018f1e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.035654] ^ [ 33.036179] ffff888018f1e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.037093] ffff888018f1e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.038004] ================================================================== [ 33.039014] Disabling lock debugging due to kernel taint [ 34.932851] BUG: Bad rss-counter state mm:00000000ac7c97a1 type:MM_FILEPAGES val:33 [ 34.933839] BUG: Bad rss-counter state mm:00000000ac7c97a1 type:MM_ANONPAGES val:22 [ 35.380554] BUG: Bad rss-counter state mm:00000000ad363c0b type:MM_FILEPAGES val:33 [ 35.381930] BUG: Bad rss-counter state mm:00000000ad363c0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4155' (ECDSA) to the list of known hosts. 2023/06/19 19:35:31 fuzzer started 2023/06/19 19:35:31 dialing manager at localhost:44161 2023/06/19 19:35:31 checking machine... 2023/06/19 19:35:31 checking revisions... [ 36.137850] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:35:32 testing simple program... [ 36.194854] cgroup: Unknown subsys name 'net' [ 36.254627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:35:29 Registers: info registers vcpu 0 RAX=ffffed100355c640 RBX=ffffed100355c800 RCX=ffffffff82158747 RDX=ffffed100355c800 RSI=0000000000001000 RDI=ffff88801aae3000 RBP=ffffed100355c600 RSP=ffff88800fcb7978 R8 =0000000000000000 R9 =ffffed100355c7ff R10=ffff88801aae3fff R11=0000000000000040 R12=ffff88801aae3000 R13=0000564e22b42490 R14=0000000000000000 R15=ffff88800fcb7db0 RIP=ffffffff8180ef6d 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 00007fbdc5eac900 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=00007ffd64569000 CR3=0000000019fe2000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc65354c270 CR3=000000000cb08000 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=c1418fe4ae3016a3e64396352011e373 XMM02=2c67c8bc2e329bc3000000000011cdc8 XMM03=fb795ef6d65770560000000000124710 XMM04=52d2daa0eb35491700000000000ae988 XMM05=19e9129bd510f2350000000000135370 XMM06=4fda316b135da52b00000000001351f8 XMM07=e042d86d42eb936e0000000000124990 XMM08=5ff12662d019a73f000000000011ce28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000