syzkaller login: [ 31.171563] BUG: Bad rss-counter state mm:0000000051ad0797 type:MM_FILEPAGES val:33 [ 31.172900] BUG: Bad rss-counter state mm:0000000051ad0797 type:MM_ANONPAGES val:22 [ 31.339702] ================================================================== [ 31.340782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.341913] Read of size 8 at addr ffff888018c00058 by task sshd/220 [ 31.342992] [ 31.343256] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.344276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.345448] Call Trace: [ 31.345770] [ 31.346053] dump_stack_lvl+0x91/0xf0 [ 31.346549] print_report+0xcc/0x620 [ 31.347026] ? __virt_addr_valid+0x102/0x340 [ 31.347578] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348791] kasan_report+0xbe/0xf0 [ 31.349275] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349897] vma_interval_tree_remove+0xc75/0xec0 [ 31.350497] vma_prepare+0xc54/0x11a0 [ 31.350971] __split_vma+0x5af/0x950 [ 31.351450] ? __pfx___split_vma+0x10/0x10 [ 31.351983] ? find_held_lock+0x2c/0x110 [ 31.352506] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.353070] ? lock_is_held_type+0x9f/0x120 [ 31.353628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.354235] ? mtree_range_walk+0x632/0x900 [ 31.354780] ? mas_walk+0x5c7/0x7c0 [ 31.355251] do_vmi_munmap+0x1f1/0x2b0 [ 31.355743] mmap_region+0x1f9/0x2660 [ 31.356223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.356727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.357446] ? __pfx_lock_acquire+0x10/0x10 [ 31.357975] ? __pfx_mmap_region+0x10/0x10 [ 31.358499] ? security_mmap_addr+0x7d/0xa0 [ 31.359026] ? get_unmapped_area+0x1f5/0x3f0 [ 31.359573] do_mmap+0x854/0xf00 [ 31.360007] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.360505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.361063] ksys_mmap_pgoff+0x3af/0x500 [ 31.361589] do_syscall_64+0x3f/0x90 [ 31.362068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362712] RIP: 0033:0x7ff1b1678d82 [ 31.363167] 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 [ 31.365293] RSP: 002b:00007ffe9c660e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.366186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1b1678d82 [ 31.367032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1b0ab2000 [ 31.367879] RBP: 00007ff1b0ab2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368724] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fc55ecd90 [ 31.369587] R13: 00007ffe9c660ea0 R14: 00007ffe9c660ed0 R15: 00007ffe9c661230 [ 31.370445] [ 31.370735] [ 31.370957] Allocated by task 213: [ 31.371385] kasan_save_stack+0x22/0x50 [ 31.371898] kasan_set_track+0x25/0x30 [ 31.372385] __kasan_slab_alloc+0x59/0x70 [ 31.372910] kmem_cache_alloc+0x16b/0x370 [ 31.373447] vm_area_dup+0x20/0x160 [ 31.373906] __split_vma+0x170/0x950 [ 31.374379] split_vma+0xc6/0x110 [ 31.374818] mprotect_fixup+0x8d2/0xb30 [ 31.375329] do_mprotect_pkey+0x87e/0xd40 [ 31.375846] __x64_sys_mprotect+0x78/0xc0 [ 31.376372] do_syscall_64+0x3f/0x90 [ 31.376857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377513] [ 31.377725] Freed by task 203: [ 31.378114] kasan_save_stack+0x22/0x50 [ 31.378617] kasan_set_track+0x25/0x30 [ 31.379111] kasan_save_free_info+0x2b/0x50 [ 31.379644] __kasan_slab_free+0x10a/0x190 [ 31.380177] kmem_cache_free+0x10d/0x4d0 [ 31.380681] rcu_core+0x8c8/0x2860 [ 31.381120] __do_softirq+0x1b7/0x7d4 [ 31.381616] [ 31.381832] Last potentially related work creation: [ 31.382418] kasan_save_stack+0x22/0x50 [ 31.382916] __kasan_record_aux_stack+0x8e/0xa0 [ 31.383491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384248] remove_vma+0x139/0x170 [ 31.384703] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385297] do_vmi_munmap+0x1f1/0x2b0 [ 31.385780] __vm_munmap+0x138/0x3a0 [ 31.386241] __x64_sys_munmap+0x59/0x80 [ 31.386745] do_syscall_64+0x3f/0x90 [ 31.387223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387875] [ 31.388088] The buggy address belongs to the object at ffff888018c00000 [ 31.388088] which belongs to the cache vm_area_struct of size 168 [ 31.389572] The buggy address is located 88 bytes inside of [ 31.389572] freed 168-byte region [ffff888018c00000, ffff888018c000a8) [ 31.390981] [ 31.391196] The buggy address belongs to the physical page: [ 31.391866] page:000000007a5887e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c00 [ 31.392959] memcg:ffff888016665d01 [ 31.393390] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.394029] page_type: 0xffffffff() [ 31.394486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.395399] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016665d01 [ 31.396308] page dumped because: kasan: bad access detected [ 31.396959] [ 31.397193] Memory state around the buggy address: [ 31.397778] ffff888018bfff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.398633] ffff888018bfff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.399481] >ffff888018c00000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.400324] ^ [ 31.401047] ffff888018c00080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.401909] ffff888018c00100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.402761] ================================================================== [ 31.403744] Disabling lock debugging due to kernel taint [ 34.403110] BUG: Bad rss-counter state mm:000000005077d230 type:MM_FILEPAGES val:33 [ 34.404659] BUG: Bad rss-counter state mm:000000005077d230 type:MM_ANONPAGES val:22 [ 34.949251] BUG: Bad rss-counter state mm:000000006601d53b type:MM_FILEPAGES val:33 [ 34.950427] BUG: Bad rss-counter state mm:000000006601d53b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10903' (ECDSA) to the list of known hosts. 2023/06/20 19:22:54 fuzzer started 2023/06/20 19:22:54 dialing manager at localhost:36067 2023/06/20 19:22:54 checking machine... 2023/06/20 19:22:54 checking revisions... [ 35.601525] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:22:54 testing simple program... [ 35.652701] cgroup: Unknown subsys name 'net' [ 35.699705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:54 Registers: info registers vcpu 0 RAX=1ffffffff0bf4893 RBX=ffffffff85fa449c RCX=ffffffff83632182 RDX=0000000000000000 RSI=ffffffff863b252e RDI=ffffffff85fa4488 RBP=ffffffff85fa4498 RSP=ffff88801906f880 R8 =ffffffff863b252e R9 =ffff88801906f978 R10=0000000000038001 R11=000000000008a6b1 R12=ffffffff85fa44a4 R13=ffffffff85fa4488 R14=ffffffff85fa4494 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fc3d0acb900 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=00007fc3d1080650 CR3=000000000f03a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880146a3680 RSI=ffffffff818cfa0b RDI=ffff888019ab2eb0 RBP=ffff888019ab2eb0 RSP=ffff88801470f860 R8 =ffff888019ab2f18 R9 =0000000000000000 R10=0000000000000001 R11=3830306234386136 R12=ffff888019ab2f40 R13=ffffffff818cf389 R14=ffff888019ab2ef8 R15=0000000000000000 RIP=ffffffff818cbcc6 RFL=00000293 [--S-A-C] 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 00007fdcc118e900 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=00007fdcc05887d0 CR3=0000000009734000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=07453032b7e9dfce00000000000ae988 XMM05=604937d8ad010e5c0000000000132978 XMM06=e4cb8bb95a7664b60000000000131810 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000