syzkaller login: [ 29.993784] BUG: Bad rss-counter state mm:000000004fc0ec81 type:MM_FILEPAGES val:33 [ 29.994972] BUG: Bad rss-counter state mm:000000004fc0ec81 type:MM_ANONPAGES val:22 [ 30.039795] ================================================================== [ 30.040697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.041629] Read of size 8 at addr ffff8880096f1310 by task sshd/219 [ 30.042389] [ 30.042606] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.043491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.044491] Call Trace: [ 30.044822] [ 30.045117] dump_stack_lvl+0x91/0xf0 [ 30.045610] print_report+0xcc/0x620 [ 30.046090] ? __virt_addr_valid+0x102/0x340 [ 30.046639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.047402] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.048016] kasan_report+0xbe/0xf0 [ 30.048494] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.049124] vma_interval_tree_remove+0xc75/0xec0 [ 30.049756] vma_prepare+0xc54/0x11a0 [ 30.050250] __split_vma+0x5af/0x950 [ 30.050725] ? __pfx___split_vma+0x10/0x10 [ 30.051265] ? find_held_lock+0x2c/0x110 [ 30.051782] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.052350] ? lock_is_held_type+0x9f/0x120 [ 30.052881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.053484] ? mtree_range_walk+0x632/0x900 [ 30.054032] ? mas_walk+0x5c7/0x7c0 [ 30.054505] do_vmi_munmap+0x1f1/0x2b0 [ 30.054992] mmap_region+0x1f9/0x2660 [ 30.055482] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.055989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.056688] ? __pfx_lock_acquire+0x10/0x10 [ 30.057214] ? __pfx_mmap_region+0x10/0x10 [ 30.057739] ? security_mmap_addr+0x7d/0xa0 [ 30.058273] ? get_unmapped_area+0x1f5/0x3f0 [ 30.058818] do_mmap+0x854/0xf00 [ 30.059271] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.059766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.060319] ksys_mmap_pgoff+0x3af/0x500 [ 30.060823] do_syscall_64+0x3f/0x90 [ 30.061296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.061943] RIP: 0033:0x7f296de76d82 [ 30.062395] 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 [ 30.064533] RSP: 002b:00007ffc9e1c4158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.065451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f296de76d82 [ 30.066312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f296d2b0000 [ 30.067197] RBP: 00007f296d2b0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.068057] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b190eaec0 [ 30.068906] R13: 00007ffc9e1c4170 R14: 00007ffc9e1c41a0 R15: 00007ffc9e1c4500 [ 30.069768] [ 30.070059] [ 30.070282] Allocated by task 212: [ 30.070733] kasan_save_stack+0x22/0x50 [ 30.071250] kasan_set_track+0x25/0x30 [ 30.071770] __kasan_slab_alloc+0x59/0x70 [ 30.072301] kmem_cache_alloc+0x16b/0x370 [ 30.072825] vm_area_dup+0x20/0x160 [ 30.073281] __split_vma+0x170/0x950 [ 30.073750] split_vma+0xc6/0x110 [ 30.074193] mprotect_fixup+0x8d2/0xb30 [ 30.074694] do_mprotect_pkey+0x87e/0xd40 [ 30.075221] __x64_sys_mprotect+0x78/0xc0 [ 30.075740] do_syscall_64+0x3f/0x90 [ 30.076216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.076850] [ 30.077067] Freed by task 212: [ 30.077461] kasan_save_stack+0x22/0x50 [ 30.077957] kasan_set_track+0x25/0x30 [ 30.078452] kasan_save_free_info+0x2b/0x50 [ 30.078987] __kasan_slab_free+0x10a/0x190 [ 30.079544] kmem_cache_free+0x10d/0x4d0 [ 30.080048] rcu_core+0x8c8/0x2860 [ 30.080492] __do_softirq+0x1b7/0x7d4 [ 30.080964] [ 30.081175] Last potentially related work creation: [ 30.081755] kasan_save_stack+0x22/0x50 [ 30.082256] __kasan_record_aux_stack+0x8e/0xa0 [ 30.082829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.083482] remove_vma+0x139/0x170 [ 30.083928] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.084484] do_vmi_munmap+0x1f1/0x2b0 [ 30.084974] __vm_munmap+0x138/0x3a0 [ 30.085438] __x64_sys_munmap+0x59/0x80 [ 30.085925] do_syscall_64+0x3f/0x90 [ 30.086405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.087046] [ 30.087265] The buggy address belongs to the object at ffff8880096f12b8 [ 30.087265] which belongs to the cache vm_area_struct of size 168 [ 30.088722] The buggy address is located 88 bytes inside of [ 30.088722] freed 168-byte region [ffff8880096f12b8, ffff8880096f1360) [ 30.090195] [ 30.090409] The buggy address belongs to the physical page: [ 30.091071] page:000000004b467027 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96f1 [ 30.092150] memcg:ffff888015c22701 [ 30.092572] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.093218] page_type: 0xffffffff() [ 30.093660] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.094575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c22701 [ 30.095479] page dumped because: kasan: bad access detected [ 30.096142] [ 30.096357] Memory state around the buggy address: [ 30.096937] ffff8880096f1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.097787] ffff8880096f1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.098639] >ffff8880096f1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.099508] ^ [ 30.099975] ffff8880096f1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.100828] ffff8880096f1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.101669] ================================================================== [ 30.102636] Disabling lock debugging due to kernel taint [ 32.902227] BUG: Bad rss-counter state mm:0000000085ff1223 type:MM_FILEPAGES val:33 [ 32.903265] BUG: Bad rss-counter state mm:0000000085ff1223 type:MM_ANONPAGES val:22 [ 33.394035] BUG: Bad rss-counter state mm:00000000fad18c9f type:MM_FILEPAGES val:33 [ 33.395135] BUG: Bad rss-counter state mm:00000000fad18c9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8339' (ECDSA) to the list of known hosts. 2023/06/20 22:34:17 fuzzer started 2023/06/20 22:34:17 dialing manager at localhost:36067 2023/06/20 22:34:17 checking machine... 2023/06/20 22:34:17 checking revisions... [ 34.122470] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:34:17 testing simple program... [ 34.164434] cgroup: Unknown subsys name 'net' [ 34.205519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:34:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88808da1b2e0 RCX=ffffffff811430ee RDX=ffff8880162a1b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800da1b2e0 RSP=ffff888018d276f8 R8 =0000000000000006 R9 =ffff88800da1b2e0 R10=ffff88808da1b2e0 R11=00000000000b6a61 R12=0000000000000000 R13=ffffea00006fd480 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff814c0261 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 00007f0e7eada900 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=00007f0e7f091618 CR3=0000000015fd6000 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=00007fea41e9a060 CR3=0000000009ce0000 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=6fe63c1866ab1caa8643a9ff3000ceec XMM02=000000000011ac18ec2efd57dc4c00df XMM03=0000000000122128f29e4d5417967271 XMM04=c4ee5edb05e83d1000000000000ae988 XMM05=dfcdbad4f1609c370000000000131f50 XMM06=a083a4bb08f37cf70000000000130db8 XMM07=e042d86d42eb936e00000000001223a8 XMM08=f29e4d5417967271000000000011ac78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000