syzkaller login: [ 30.625064] BUG: Bad rss-counter state mm:0000000088635d94 type:MM_FILEPAGES val:33 [ 30.626060] BUG: Bad rss-counter state mm:0000000088635d94 type:MM_ANONPAGES val:22 [ 30.786443] ================================================================== [ 30.787613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.788905] Read of size 8 at addr ffff88801a0943f8 by task sshd/220 [ 30.789785] [ 30.790005] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.790871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.791848] Call Trace: [ 30.792169] <TASK> [ 30.792453] dump_stack_lvl+0x91/0xf0 [ 30.792944] print_report+0xcc/0x620 [ 30.793431] ? __virt_addr_valid+0x102/0x340 [ 30.793983] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794597] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795204] kasan_report+0xbe/0xf0 [ 30.795680] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796301] vma_interval_tree_remove+0xc75/0xec0 [ 30.796912] vma_prepare+0xc54/0x11a0 [ 30.797406] __split_vma+0x5af/0x950 [ 30.797876] ? __pfx___split_vma+0x10/0x10 [ 30.798401] ? find_held_lock+0x2c/0x110 [ 30.798912] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.799472] ? lock_is_held_type+0x9f/0x120 [ 30.800000] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.800600] ? mtree_range_walk+0x632/0x900 [ 30.801150] ? mas_walk+0x5c7/0x7c0 [ 30.801627] do_vmi_munmap+0x1f1/0x2b0 [ 30.802118] mmap_region+0x1f9/0x2660 [ 30.802600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.803107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.803819] ? __pfx_lock_acquire+0x10/0x10 [ 30.804345] ? __pfx_mmap_region+0x10/0x10 [ 30.804872] ? security_mmap_addr+0x7d/0xa0 [ 30.805437] ? get_unmapped_area+0x1f5/0x3f0 [ 30.805994] do_mmap+0x854/0xf00 [ 30.806442] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.806935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.807508] ksys_mmap_pgoff+0x3af/0x500 [ 30.808011] do_syscall_64+0x3f/0x90 [ 30.808492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809144] RIP: 0033:0x7f17ed566d82 [ 30.809615] 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 [ 30.811752] RSP: 002b:00007fff0a128058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.812652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17ed566d82 [ 30.813499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17ec9a0000 [ 30.814357] RBP: 00007f17ec9a0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.815197] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d4d25aec0 [ 30.816032] R13: 00007fff0a128070 R14: 00007fff0a1280a0 R15: 00007fff0a128400 [ 30.816894] </TASK> [ 30.817183] [ 30.817409] Allocated by task 213: [ 30.817839] kasan_save_stack+0x22/0x50 [ 30.818341] kasan_set_track+0x25/0x30 [ 30.818838] __kasan_slab_alloc+0x59/0x70 [ 30.819350] kmem_cache_alloc+0x16b/0x370 [ 30.819865] vm_area_dup+0x20/0x160 [ 30.820316] __split_vma+0x170/0x950 [ 30.820782] split_vma+0xc6/0x110 [ 30.821218] mprotect_fixup+0x8d2/0xb30 [ 30.821723] do_mprotect_pkey+0x87e/0xd40 [ 30.822238] __x64_sys_mprotect+0x78/0xc0 [ 30.822752] do_syscall_64+0x3f/0x90 [ 30.823220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823860] [ 30.824071] Freed by task 213: [ 30.824456] kasan_save_stack+0x22/0x50 [ 30.824955] kasan_set_track+0x25/0x30 [ 30.825448] kasan_save_free_info+0x2b/0x50 [ 30.825973] __kasan_slab_free+0x10a/0x190 [ 30.826501] kmem_cache_free+0x10d/0x4d0 [ 30.827008] rcu_core+0x8c8/0x2860 [ 30.827446] __do_softirq+0x1b7/0x7d4 [ 30.827921] [ 30.828134] Last potentially related work creation: [ 30.828711] kasan_save_stack+0x22/0x50 [ 30.829212] __kasan_record_aux_stack+0x8e/0xa0 [ 30.829847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.830489] remove_vma+0x139/0x170 [ 30.830933] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.831484] do_vmi_munmap+0x1f1/0x2b0 [ 30.831965] __vm_munmap+0x138/0x3a0 [ 30.832428] __x64_sys_munmap+0x59/0x80 [ 30.832919] do_syscall_64+0x3f/0x90 [ 30.833398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834037] [ 30.834250] The buggy address belongs to the object at ffff88801a0943a0 [ 30.834250] which belongs to the cache vm_area_struct of size 168 [ 30.835711] The buggy address is located 88 bytes inside of [ 30.835711] freed 168-byte region [ffff88801a0943a0, ffff88801a094448) [ 30.837107] [ 30.837321] The buggy address belongs to the physical page: [ 30.837979] page:0000000036d25a23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a094 [ 30.839060] memcg:ffff888018139f01 [ 30.839480] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.840129] page_type: 0xffffffff() [ 30.840584] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.841497] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018139f01 [ 30.842393] page dumped because: kasan: bad access detected [ 30.843044] [ 30.843257] Memory state around the buggy address: [ 30.843837] ffff88801a094280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.844689] ffff88801a094300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.845545] >ffff88801a094380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.846383] ^ [ 30.847220] ffff88801a094400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.848069] ffff88801a094480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.848914] ================================================================== [ 30.850029] Disabling lock debugging due to kernel taint [ 33.219361] BUG: Bad rss-counter state mm:000000005570ab98 type:MM_FILEPAGES val:33 [ 33.220029] BUG: Bad rss-counter state mm:000000005570ab98 type:MM_ANONPAGES val:22 [ 33.696565] BUG: Bad rss-counter state mm:000000006f804735 type:MM_FILEPAGES val:33 [ 33.698116] BUG: Bad rss-counter state mm:000000006f804735 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4583' (ECDSA) to the list of known hosts. 2023/06/20 11:23:20 fuzzer started 2023/06/20 11:23:20 dialing manager at localhost:36067 2023/06/20 11:23:20 checking machine... 2023/06/20 11:23:20 checking revisions... [ 34.363018] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:23:21 testing simple program... [ 34.398111] cgroup: Unknown subsys name 'net' [ 34.435566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007faac4f7a650 CR3=000000000f16e000 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=2030323a33323a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a33323a3131203032 XMM08=3d656e696c646d632022656369767265 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=00007efc9e2ec0b0 CR3=000000000c6a0000 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=c96281780a00b9a2924e6d93afc941d8 XMM02=2c67c8bc2e329bc3000000000011b460 XMM03=fb795ef6d65770560000000000122240 XMM04=0dc4f47db1ab816f00000000000ae988 XMM05=19e9129bd510f2350000000000132090 XMM06=4fda316b135da52b0000000000131f18 XMM07=e042d86d42eb936e00000000001224c0 XMM08=2b204fabf97883bf000000000011b4c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000