syzkaller login: [ 68.860735] BUG: Bad rss-counter state mm:0000000026cfde68 type:MM_FILEPAGES val:33 [ 68.862281] BUG: Bad rss-counter state mm:0000000026cfde68 type:MM_ANONPAGES val:22 [ 69.018276] ================================================================== [ 69.019345] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.020434] Read of size 8 at addr ffff888019dc2140 by task sshd/228 [ 69.021460] [ 69.021701] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.022675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.023786] Call Trace: [ 69.024148] [ 69.024466] dump_stack_lvl+0x91/0xf0 [ 69.025012] print_report+0xcc/0x620 [ 69.025562] ? __virt_addr_valid+0x102/0x340 [ 69.026201] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.026894] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.027578] kasan_report+0xbe/0xf0 [ 69.028119] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.028810] vma_interval_tree_remove+0xc75/0xec0 [ 69.029486] vma_prepare+0xc54/0x11a0 [ 69.030019] __split_vma+0x5af/0x950 [ 69.030550] ? __pfx___split_vma+0x10/0x10 [ 69.031135] ? find_held_lock+0x2c/0x110 [ 69.031723] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.032358] ? lock_is_held_type+0x9f/0x120 [ 69.032979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.033688] ? mtree_range_walk+0x632/0x900 [ 69.034313] ? mas_walk+0x5c7/0x7c0 [ 69.034855] do_vmi_munmap+0x1f1/0x2b0 [ 69.035419] mmap_region+0x1f9/0x2660 [ 69.035995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.036585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.037405] ? __pfx_lock_acquire+0x10/0x10 [ 69.038023] ? __pfx_mmap_region+0x10/0x10 [ 69.038604] ? security_mmap_addr+0x7d/0xa0 [ 69.039187] ? get_unmapped_area+0x1f5/0x3f0 [ 69.039797] do_mmap+0x854/0xf00 [ 69.040278] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.040818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.041425] ksys_mmap_pgoff+0x3af/0x500 [ 69.041975] do_syscall_64+0x3f/0x90 [ 69.042506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.043216] RIP: 0033:0x7f00f7127d82 [ 69.043746] 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 [ 69.046072] RSP: 002b:00007ffcd9bef6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.047053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00f7127d82 [ 69.047984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00f6561000 [ 69.048905] RBP: 00007f00f6561000 R08: 0000000000000009 R09: 0000000000001000 [ 69.049822] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557519d5bec0 [ 69.050749] R13: 00007ffcd9bef6d0 R14: 00007ffcd9bef700 R15: 00007ffcd9befa60 [ 69.051692] [ 69.052006] [ 69.052242] Allocated by task 221: [ 69.052712] kasan_save_stack+0x22/0x50 [ 69.053261] kasan_set_track+0x25/0x30 [ 69.053793] __kasan_slab_alloc+0x59/0x70 [ 69.054365] kmem_cache_alloc+0x16b/0x370 [ 69.054927] vm_area_dup+0x20/0x160 [ 69.055422] __split_vma+0x170/0x950 [ 69.055948] split_vma+0xc6/0x110 [ 69.056422] mprotect_fixup+0x8d2/0xb30 [ 69.056962] do_mprotect_pkey+0x87e/0xd40 [ 69.057527] __x64_sys_mprotect+0x78/0xc0 [ 69.058095] do_syscall_64+0x3f/0x90 [ 69.058607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.059298] [ 69.059538] Freed by task 221: [ 69.059977] kasan_save_stack+0x22/0x50 [ 69.060517] kasan_set_track+0x25/0x30 [ 69.061048] kasan_save_free_info+0x2b/0x50 [ 69.061621] __kasan_slab_free+0x10a/0x190 [ 69.062212] kmem_cache_free+0x10d/0x4d0 [ 69.062853] rcu_core+0x8c8/0x2860 [ 69.063333] __do_softirq+0x1b7/0x7d4 [ 69.063872] [ 69.064107] Last potentially related work creation: [ 69.064772] kasan_save_stack+0x22/0x50 [ 69.065316] __kasan_record_aux_stack+0x8e/0xa0 [ 69.065945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.066652] remove_vma+0x139/0x170 [ 69.067145] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.067753] do_vmi_munmap+0x1f1/0x2b0 [ 69.068281] __vm_munmap+0x138/0x3a0 [ 69.068800] __x64_sys_munmap+0x59/0x80 [ 69.069358] do_syscall_64+0x3f/0x90 [ 69.069887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.070601] [ 69.070840] The buggy address belongs to the object at ffff888019dc20e8 [ 69.070840] which belongs to the cache vm_area_struct of size 168 [ 69.072499] The buggy address is located 88 bytes inside of [ 69.072499] freed 168-byte region [ffff888019dc20e8, ffff888019dc2190) [ 69.074067] [ 69.074308] The buggy address belongs to the physical page: [ 69.075049] page:000000003de748f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dc2 [ 69.076285] memcg:ffff888019d68a01 [ 69.076751] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.077471] page_type: 0xffffffff() [ 69.077971] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.078997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d68a01 [ 69.080005] page dumped because: kasan: bad access detected [ 69.080742] [ 69.080977] Memory state around the buggy address: [ 69.081624] ffff888019dc2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.082574] ffff888019dc2080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 69.083522] >ffff888019dc2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.084483] ^ [ 69.085196] ffff888019dc2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 69.086149] ffff888019dc2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 69.087087] ================================================================== [ 69.088162] Disabling lock debugging due to kernel taint [ 71.168338] BUG: Bad rss-counter state mm:00000000f2becef9 type:MM_FILEPAGES val:33 [ 71.169511] BUG: Bad rss-counter state mm:00000000f2becef9 type:MM_ANONPAGES val:22 [ 71.577174] BUG: Bad rss-counter state mm:00000000d8be9ccf type:MM_FILEPAGES val:33 [ 71.578216] BUG: Bad rss-counter state mm:00000000d8be9ccf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23008' (ECDSA) to the list of known hosts. 2023/06/20 12:31:43 fuzzer started 2023/06/20 12:31:43 dialing manager at localhost:36067 2023/06/20 12:31:43 checking machine... 2023/06/20 12:31:43 checking revisions... [ 72.292469] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:31:44 testing simple program... [ 72.345259] cgroup: Unknown subsys name 'net' [ 72.429584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:43 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000083f905a2 RCX=ffff88806c882d10 RDX=0000000000000012 RSI=0000000000000003 RDI=000000008f5573c5 RBP=ffff88800f246ab0 RSP=ffff888016d97228 R8 =00000000a5b65578 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016d97290 R15=0000000000000012 RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007fc1fe2c0900 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=00007fc1fe877618 CR3=000000000c562000 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=ffff888008c04400 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=00007f815f0fc020 CR3=000000000d7f8000 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=5eaefd5e5521d2a85840b0abe3de4695 XMM02=000000000011b408ec2efd57dc4c00df XMM03=00000000001225f867f54faf17c05045 XMM04=34fbeb96a488662a00000000000ae988 XMM05=a573cd0136278a030000000000132fc0 XMM06=8fede82a5ad58cbe00000000001329b8 XMM07=e042d86d42eb936e0000000000122878 XMM08=67f54faf17c05045000000000011b468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000