syzkaller login: [ 31.801191] BUG: Bad rss-counter state mm:000000004d97daf6 type:MM_FILEPAGES val:33 [ 31.802416] BUG: Bad rss-counter state mm:000000004d97daf6 type:MM_ANONPAGES val:22 [ 31.915036] ================================================================== [ 31.915774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.916494] Read of size 8 at addr ffff888014609140 by task sshd/220 [ 31.917089] [ 31.917254] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.917911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.918657] Call Trace: [ 31.918904] [ 31.919122] dump_stack_lvl+0x91/0xf0 [ 31.919501] print_report+0xcc/0x620 [ 31.920050] ? __virt_addr_valid+0x102/0x340 [ 31.920473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920948] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.921413] kasan_report+0xbe/0xf0 [ 31.921781] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.922268] vma_interval_tree_remove+0xc75/0xec0 [ 31.922733] vma_prepare+0xc54/0x11a0 [ 31.923106] __split_vma+0x5af/0x950 [ 31.923470] ? __pfx___split_vma+0x10/0x10 [ 31.923899] ? find_held_lock+0x2c/0x110 [ 31.924303] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.924739] ? lock_is_held_type+0x9f/0x120 [ 31.925164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.925631] ? mtree_range_walk+0x632/0x900 [ 31.926060] ? mas_walk+0x5c7/0x7c0 [ 31.926424] do_vmi_munmap+0x1f1/0x2b0 [ 31.926807] mmap_region+0x1f9/0x2660 [ 31.927179] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.927574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.928141] ? __pfx_lock_acquire+0x10/0x10 [ 31.928555] ? __pfx_mmap_region+0x10/0x10 [ 31.928964] ? security_mmap_addr+0x7d/0xa0 [ 31.929374] ? get_unmapped_area+0x1f5/0x3f0 [ 31.929797] do_mmap+0x854/0xf00 [ 31.930135] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.930516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.930954] ksys_mmap_pgoff+0x3af/0x500 [ 31.931348] do_syscall_64+0x3f/0x90 [ 31.931720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.932220] RIP: 0033:0x7f1037e4ed82 [ 31.932570] 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 [ 31.934219] RSP: 002b:00007fffae22dcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.934915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1037e4ed82 [ 31.935569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1037288000 [ 31.936233] RBP: 00007f1037288000 R08: 0000000000000009 R09: 0000000000001000 [ 31.936880] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c90ed07b20 [ 31.937531] R13: 00007fffae22dce0 R14: 00007fffae22dd10 R15: 00007fffae22e070 [ 31.938186] [ 31.938410] [ 31.938576] Allocated by task 213: [ 31.938907] kasan_save_stack+0x22/0x50 [ 31.939296] kasan_set_track+0x25/0x30 [ 31.939682] __kasan_slab_alloc+0x59/0x70 [ 31.940089] kmem_cache_alloc+0x16b/0x370 [ 31.940493] vm_area_dup+0x20/0x160 [ 31.940844] __split_vma+0x170/0x950 [ 31.941202] split_vma+0xc6/0x110 [ 31.941543] mprotect_fixup+0x8d2/0xb30 [ 31.941931] do_mprotect_pkey+0x87e/0xd40 [ 31.942339] __x64_sys_mprotect+0x78/0xc0 [ 31.942738] do_syscall_64+0x3f/0x90 [ 31.943102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.943600] [ 31.943777] Freed by task 13: [ 31.944071] kasan_save_stack+0x22/0x50 [ 31.944460] kasan_set_track+0x25/0x30 [ 31.944846] kasan_save_free_info+0x2b/0x50 [ 31.945262] __kasan_slab_free+0x10a/0x190 [ 31.945672] kmem_cache_free+0x10d/0x4d0 [ 31.946067] rcu_core+0x8c8/0x2860 [ 31.946414] __do_softirq+0x1b7/0x7d4 [ 31.946786] [ 31.946952] Last potentially related work creation: [ 31.947408] kasan_save_stack+0x22/0x50 [ 31.947815] __kasan_record_aux_stack+0x8e/0xa0 [ 31.948256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.948755] remove_vma+0x139/0x170 [ 31.949109] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.949542] do_vmi_munmap+0x1f1/0x2b0 [ 31.949913] __vm_munmap+0x138/0x3a0 [ 31.950272] __x64_sys_munmap+0x59/0x80 [ 31.950656] do_syscall_64+0x3f/0x90 [ 31.951020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.951514] [ 31.951689] The buggy address belongs to the object at ffff8880146090e8 [ 31.951689] which belongs to the cache vm_area_struct of size 168 [ 31.952836] The buggy address is located 88 bytes inside of [ 31.952836] freed 168-byte region [ffff8880146090e8, ffff888014609190) [ 31.953928] [ 31.954097] The buggy address belongs to the physical page: [ 31.954609] page:00000000ccbff836 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14609 [ 31.955452] memcg:ffff88800ef1c401 [ 31.955788] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.956277] page_type: 0xffffffff() [ 31.956625] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.957330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef1c401 [ 31.958030] page dumped because: kasan: bad access detected [ 31.958538] [ 31.958707] Memory state around the buggy address: [ 31.959160] ffff888014609000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.959836] ffff888014609080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.960503] >ffff888014609100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.961225] ^ [ 31.961721] ffff888014609180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.962384] ffff888014609200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.963039] ================================================================== [ 31.963761] Disabling lock debugging due to kernel taint [ 33.847984] BUG: Bad rss-counter state mm:00000000c14bf07b type:MM_FILEPAGES val:33 [ 33.848697] BUG: Bad rss-counter state mm:00000000c14bf07b type:MM_ANONPAGES val:22 [ 34.344481] BUG: Bad rss-counter state mm:0000000065f4f832 type:MM_FILEPAGES val:33 [ 34.345506] BUG: Bad rss-counter state mm:0000000065f4f832 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36317' (ECDSA) to the list of known hosts. 2023/06/20 05:10:18 fuzzer started 2023/06/20 05:10:19 dialing manager at localhost:44161 2023/06/20 05:10:19 checking machine... 2023/06/20 05:10:19 checking revisions... [ 35.081536] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:10:19 testing simple program... [ 35.126273] cgroup: Unknown subsys name 'net' [ 35.170490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:10:18 Registers: info registers vcpu 0 RAX=00000000fefeffd0 RBX=0000000000000000 RCX=0000000000000020 RDX=00005568daef1ce0 RSI=00007ffcc87d9b18 RDI=00005568daef1ce0 RBP=00007ffcc87d9b50 RSP=00007ffcc87d95f8 R8 =00000000ffffffff R9 =0000000000000015 R10=00005568daef1ce0 R11=0000000000000000 R12=00007ffcc87d9b60 R13=00007f51ee347a84 R14=00007ffcc87d9ca0 R15=0000000000000073 RIP=00007f51edd6bad9 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f51ed818900 00000000 00000000 GS =0000 0000000000000000 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=00007f51eddd00b0 CR3=000000000e792000 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=ffffffffffffffffffff00ff00000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=707465675f6c697475646f6d6d61705f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f47f2f98460 CR3=0000000009a0a000 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=cebe77bca1d8efadcb42ce50e0869600 XMM02=2c67c8bc2e329bc3000000000011c080 XMM03=fb795ef6d657705600000000001238f0 XMM04=f64565b40364185900000000000ae988 XMM05=19e9129bd510f2350000000000133488 XMM06=3bda07eb50e8220b00000000001322f0 XMM07=e042d86d42eb936e0000000000123b70 XMM08=7f0105acf6f116f9000000000011c0e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000