syzkaller login: [ 62.175848] BUG: Bad rss-counter state mm:00000000187685ce type:MM_FILEPAGES val:33 [ 62.177392] BUG: Bad rss-counter state mm:00000000187685ce type:MM_ANONPAGES val:22 [ 62.344483] ================================================================== [ 62.345689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.346901] Read of size 8 at addr ffff8880095e6140 by task sshd/220 [ 62.347811] [ 62.348071] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.349113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.350281] Call Trace: [ 62.350656] [ 62.350991] dump_stack_lvl+0x91/0xf0 [ 62.351568] print_report+0xcc/0x620 [ 62.352142] ? __virt_addr_valid+0x102/0x340 [ 62.352801] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.353543] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.354278] kasan_report+0xbe/0xf0 [ 62.354834] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.355571] vma_interval_tree_remove+0xc75/0xec0 [ 62.356279] vma_prepare+0xc54/0x11a0 [ 62.356877] __split_vma+0x5af/0x950 [ 62.357440] ? __pfx___split_vma+0x10/0x10 [ 62.358073] ? find_held_lock+0x2c/0x110 [ 62.358702] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.359372] ? lock_is_held_type+0x9f/0x120 [ 62.360004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.360724] ? mtree_range_walk+0x632/0x900 [ 62.361386] ? mas_walk+0x5c7/0x7c0 [ 62.361952] do_vmi_munmap+0x1f1/0x2b0 [ 62.362531] mmap_region+0x1f9/0x2660 [ 62.363107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.363704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.364551] ? __pfx_lock_acquire+0x10/0x10 [ 62.365209] ? __pfx_mmap_region+0x10/0x10 [ 62.365836] ? security_mmap_addr+0x7d/0xa0 [ 62.366458] ? get_unmapped_area+0x1f5/0x3f0 [ 62.367107] do_mmap+0x854/0xf00 [ 62.367636] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.368226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.368902] ksys_mmap_pgoff+0x3af/0x500 [ 62.369502] do_syscall_64+0x3f/0x90 [ 62.370078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.370850] RIP: 0033:0x7f623d592d82 [ 62.371371] 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 [ 62.373878] RSP: 002b:00007ffe075d0828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.374941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f623d592d82 [ 62.375939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f623c9cc000 [ 62.376948] RBP: 00007f623c9cc000 R08: 0000000000000009 R09: 0000000000001000 [ 62.377928] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559aeaf0a980 [ 62.378907] R13: 00007ffe075d0840 R14: 00007ffe075d0870 R15: 00007ffe075d0bd0 [ 62.379900] [ 62.380237] [ 62.380484] Allocated by task 213: [ 62.380989] kasan_save_stack+0x22/0x50 [ 62.381570] kasan_set_track+0x25/0x30 [ 62.382139] __kasan_slab_alloc+0x59/0x70 [ 62.382744] kmem_cache_alloc+0x16b/0x370 [ 62.383337] vm_area_dup+0x20/0x160 [ 62.383859] __split_vma+0x170/0x950 [ 62.384396] split_vma+0xc6/0x110 [ 62.384921] mprotect_fixup+0x8d2/0xb30 [ 62.385498] do_mprotect_pkey+0x87e/0xd40 [ 62.386055] __x64_sys_mprotect+0x78/0xc0 [ 62.386608] do_syscall_64+0x3f/0x90 [ 62.387113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.387785] [ 62.388007] Freed by task 203: [ 62.388421] kasan_save_stack+0x22/0x50 [ 62.388958] kasan_set_track+0x25/0x30 [ 62.389481] kasan_save_free_info+0x2b/0x50 [ 62.390052] __kasan_slab_free+0x10a/0x190 [ 62.390618] kmem_cache_free+0x10d/0x4d0 [ 62.391158] rcu_core+0x8c8/0x2860 [ 62.391629] __do_softirq+0x1b7/0x7d4 [ 62.392139] [ 62.392367] Last potentially related work creation: [ 62.392993] kasan_save_stack+0x22/0x50 [ 62.393522] __kasan_record_aux_stack+0x8e/0xa0 [ 62.394121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.394800] remove_vma+0x139/0x170 [ 62.395280] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.395874] do_vmi_munmap+0x1f1/0x2b0 [ 62.396386] __vm_munmap+0x138/0x3a0 [ 62.396906] __x64_sys_munmap+0x59/0x80 [ 62.397431] do_syscall_64+0x3f/0x90 [ 62.397925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.398602] [ 62.398832] The buggy address belongs to the object at ffff8880095e60e8 [ 62.398832] which belongs to the cache vm_area_struct of size 168 [ 62.400404] The buggy address is located 88 bytes inside of [ 62.400404] freed 168-byte region [ffff8880095e60e8, ffff8880095e6190) [ 62.401903] [ 62.402131] The buggy address belongs to the physical page: [ 62.402874] page:00000000f291105f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95e6 [ 62.404002] memcg:ffff88800901b701 [ 62.404437] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.405128] page_type: 0xffffffff() [ 62.405601] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.406589] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800901b701 [ 62.407534] page dumped because: kasan: bad access detected [ 62.408212] [ 62.408437] Memory state around the buggy address: [ 62.409049] ffff8880095e6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.409944] ffff8880095e6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 62.410818] >ffff8880095e6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.411697] ^ [ 62.412364] ffff8880095e6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 62.413261] ffff8880095e6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.414142] ================================================================== [ 62.415213] Disabling lock debugging due to kernel taint [ 65.266961] BUG: Bad rss-counter state mm:00000000140585f4 type:MM_FILEPAGES val:33 [ 65.268491] BUG: Bad rss-counter state mm:00000000140585f4 type:MM_ANONPAGES val:22 [ 65.757229] BUG: Bad rss-counter state mm:0000000037c10e73 type:MM_FILEPAGES val:33 [ 65.758413] BUG: Bad rss-counter state mm:0000000037c10e73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49487' (ECDSA) to the list of known hosts. 2023/06/20 00:37:55 fuzzer started 2023/06/20 00:37:55 dialing manager at localhost:44161 2023/06/20 00:37:55 checking machine... 2023/06/20 00:37:55 checking revisions... [ 66.478247] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:37:55 testing simple program... [ 66.528647] cgroup: Unknown subsys name 'net' [ 66.588258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff81f587e3 RDX=ffff8880169fd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff849c8a80 RSP=ffff88800da77a40 R8 =0000000000000005 R9 =0000000000000040 R10=0000000000000010 R11=00000000000b6996 R12=0000000000000010 R13=0000000000000005 R14=0000000000000003 R15=dffffc0000000000 RIP=ffffffff814c01fc 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 00007f2fff7b0900 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=00007f2fffd67618 CR3=00000000147b4000 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=ffffffff813782a8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff813782a8 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888009d48a80 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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=00007f4a072403d0 CR3=0000000018434000 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=2035353a37333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a37333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000