syzkaller login: [ 31.292779] BUG: Bad rss-counter state mm:00000000e15d16c4 type:MM_FILEPAGES val:33 [ 31.294005] BUG: Bad rss-counter state mm:00000000e15d16c4 type:MM_ANONPAGES val:22 [ 31.335942] ================================================================== [ 31.336874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.337904] Read of size 8 at addr ffff8880100364e0 by task sshd/220 [ 31.338768] [ 31.338990] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.339910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.340909] Call Trace: [ 31.341234] [ 31.341525] dump_stack_lvl+0x91/0xf0 [ 31.342015] print_report+0xcc/0x620 [ 31.342503] ? __virt_addr_valid+0x102/0x340 [ 31.343067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.343701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.344310] kasan_report+0xbe/0xf0 [ 31.344800] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.345420] vma_interval_tree_remove+0xc75/0xec0 [ 31.346015] vma_prepare+0xc54/0x11a0 [ 31.346491] __split_vma+0x5af/0x950 [ 31.346965] ? __pfx___split_vma+0x10/0x10 [ 31.347521] ? find_held_lock+0x2c/0x110 [ 31.348037] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.348611] ? lock_is_held_type+0x9f/0x120 [ 31.349156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.349763] ? mtree_range_walk+0x632/0x900 [ 31.350314] ? mas_walk+0x5c7/0x7c0 [ 31.350793] do_vmi_munmap+0x1f1/0x2b0 [ 31.351285] mmap_region+0x1f9/0x2660 [ 31.351773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.352278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.352986] ? __pfx_lock_acquire+0x10/0x10 [ 31.353514] ? __pfx_mmap_region+0x10/0x10 [ 31.354046] ? security_mmap_addr+0x7d/0xa0 [ 31.354577] ? get_unmapped_area+0x1f5/0x3f0 [ 31.355126] do_mmap+0x854/0xf00 [ 31.355586] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.356098] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.356663] ksys_mmap_pgoff+0x3af/0x500 [ 31.357165] do_syscall_64+0x3f/0x90 [ 31.357644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.358291] RIP: 0033:0x7f911d388d82 [ 31.358747] 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 [ 31.360875] RSP: 002b:00007ffc3044a718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.361773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f911d388d82 [ 31.362617] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f911c7c2000 [ 31.363463] RBP: 00007f911c7c2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.364312] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c26c38ec0 [ 31.365150] R13: 00007ffc3044a730 R14: 00007ffc3044a760 R15: 00007ffc3044aac0 [ 31.365997] [ 31.366287] [ 31.366508] Allocated by task 213: [ 31.366937] kasan_save_stack+0x22/0x50 [ 31.367442] kasan_set_track+0x25/0x30 [ 31.367949] __kasan_slab_alloc+0x59/0x70 [ 31.368473] kmem_cache_alloc+0x16b/0x370 [ 31.368984] vm_area_dup+0x20/0x160 [ 31.369436] __split_vma+0x170/0x950 [ 31.369899] split_vma+0xc6/0x110 [ 31.370341] mprotect_fixup+0x8d2/0xb30 [ 31.370850] do_mprotect_pkey+0x87e/0xd40 [ 31.371369] __x64_sys_mprotect+0x78/0xc0 [ 31.371912] do_syscall_64+0x3f/0x90 [ 31.372384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373028] [ 31.373244] Freed by task 213: [ 31.373643] kasan_save_stack+0x22/0x50 [ 31.374141] kasan_set_track+0x25/0x30 [ 31.374641] kasan_save_free_info+0x2b/0x50 [ 31.375170] __kasan_slab_free+0x10a/0x190 [ 31.375727] kmem_cache_free+0x10d/0x4d0 [ 31.376229] rcu_core+0x8c8/0x2860 [ 31.376669] __do_softirq+0x1b7/0x7d4 [ 31.377145] [ 31.377359] Last potentially related work creation: [ 31.377956] kasan_save_stack+0x22/0x50 [ 31.378460] __kasan_record_aux_stack+0x8e/0xa0 [ 31.379034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.379694] remove_vma+0x139/0x170 [ 31.380152] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.380720] do_vmi_munmap+0x1f1/0x2b0 [ 31.381203] __vm_munmap+0x138/0x3a0 [ 31.381679] __x64_sys_munmap+0x59/0x80 [ 31.382174] do_syscall_64+0x3f/0x90 [ 31.382648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.383295] [ 31.383517] The buggy address belongs to the object at ffff888010036488 [ 31.383517] which belongs to the cache vm_area_struct of size 168 [ 31.384978] The buggy address is located 88 bytes inside of [ 31.384978] freed 168-byte region [ffff888010036488, ffff888010036530) [ 31.386394] [ 31.386616] The buggy address belongs to the physical page: [ 31.387273] page:00000000d1c2d614 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10036 [ 31.388371] memcg:ffff888016ab3701 [ 31.388804] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.389450] page_type: 0xffffffff() [ 31.389905] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.390820] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ab3701 [ 31.391736] page dumped because: kasan: bad access detected [ 31.392397] [ 31.392610] Memory state around the buggy address: [ 31.393192] ffff888010036380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.394054] ffff888010036400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.394906] >ffff888010036480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.395788] ^ [ 31.396543] ffff888010036500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.397409] ffff888010036580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.398255] ================================================================== [ 31.399528] Disabling lock debugging due to kernel taint [ 34.213160] BUG: Bad rss-counter state mm:000000000d8114d8 type:MM_FILEPAGES val:33 [ 34.214514] BUG: Bad rss-counter state mm:000000000d8114d8 type:MM_ANONPAGES val:22 [ 34.663732] BUG: Bad rss-counter state mm:000000001efa15a9 type:MM_FILEPAGES val:33 [ 34.664925] BUG: Bad rss-counter state mm:000000001efa15a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20206' (ECDSA) to the list of known hosts. 2023/06/20 12:26:01 fuzzer started 2023/06/20 12:26:01 dialing manager at localhost:36067 2023/06/20 12:26:01 checking machine... 2023/06/20 12:26:01 checking revisions... [ 35.409643] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:26:02 testing simple program... [ 35.468675] cgroup: Unknown subsys name 'net' [ 35.508625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:26:01 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=0000000000000001 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=000055b55d843fe0 CR3=0000000016418000 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=2031303a36323a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1fdae0677cde2300 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed100d9e1399 RSP=ffff88806cf09cb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff81828d41 R14=ffff88800c6ced90 R15=0000000000000001 RIP=ffffffff812d8a44 RFL=00000286 [--S--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 00007fcedcade900 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=00007fd272986650 CR3=000000000f6b4000 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=86542561ce60498000000000000ae988 XMM05=42d1784970b63ab200000000001327d8 XMM06=19e9129bd510f2350000000000131690 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000