syzkaller login: [ 41.458539] BUG: Bad rss-counter state mm:000000009b29120d type:MM_FILEPAGES val:33 [ 41.460177] BUG: Bad rss-counter state mm:000000009b29120d type:MM_ANONPAGES val:22 [ 41.612701] ================================================================== [ 41.613798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.615130] Read of size 8 at addr ffff88800da263f8 by task sshd/220 [ 41.615970] [ 41.616200] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.617143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.618178] Call Trace: [ 41.618516] [ 41.618831] dump_stack_lvl+0x91/0xf0 [ 41.619349] print_report+0xcc/0x620 [ 41.619868] ? __virt_addr_valid+0x102/0x340 [ 41.620455] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.621113] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.621769] kasan_report+0xbe/0xf0 [ 41.622280] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.622986] vma_interval_tree_remove+0xc75/0xec0 [ 41.623649] vma_prepare+0xc54/0x11a0 [ 41.624170] __split_vma+0x5af/0x950 [ 41.624687] ? __pfx___split_vma+0x10/0x10 [ 41.625267] ? find_held_lock+0x2c/0x110 [ 41.625834] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.626458] ? lock_is_held_type+0x9f/0x120 [ 41.627061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.627724] ? mtree_range_walk+0x632/0x900 [ 41.628329] ? mas_walk+0x5c7/0x7c0 [ 41.628847] do_vmi_munmap+0x1f1/0x2b0 [ 41.629382] mmap_region+0x1f9/0x2660 [ 41.629906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.630467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.631254] ? __pfx_lock_acquire+0x10/0x10 [ 41.631840] ? __pfx_mmap_region+0x10/0x10 [ 41.632419] ? security_mmap_addr+0x7d/0xa0 [ 41.633001] ? get_unmapped_area+0x1f5/0x3f0 [ 41.633601] do_mmap+0x854/0xf00 [ 41.634078] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.634620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.635264] ksys_mmap_pgoff+0x3af/0x500 [ 41.635824] do_syscall_64+0x3f/0x90 [ 41.636345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.637053] RIP: 0033:0x7f8b1bcc7d82 [ 41.637555] 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 [ 41.639898] RSP: 002b:00007ffc30746ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.640889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b1bcc7d82 [ 41.641819] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b1b101000 [ 41.642759] RBP: 00007f8b1b101000 R08: 0000000000000009 R09: 0000000000001000 [ 41.643684] R10: 0000000000000812 R11: 0000000000000206 R12: 000056378b830d90 [ 41.644606] R13: 00007ffc30746ec0 R14: 00007ffc30746ef0 R15: 00007ffc30747250 [ 41.645542] [ 41.645859] [ 41.646093] Allocated by task 213: [ 41.646564] kasan_save_stack+0x22/0x50 [ 41.647140] kasan_set_track+0x25/0x30 [ 41.647678] __kasan_slab_alloc+0x59/0x70 [ 41.648249] kmem_cache_alloc+0x16b/0x370 [ 41.648811] vm_area_dup+0x20/0x160 [ 41.649308] __split_vma+0x170/0x950 [ 41.649818] split_vma+0xc6/0x110 [ 41.650294] mprotect_fixup+0x8d2/0xb30 [ 41.650857] do_mprotect_pkey+0x87e/0xd40 [ 41.651428] __x64_sys_mprotect+0x78/0xc0 [ 41.651998] do_syscall_64+0x3f/0x90 [ 41.652517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.653217] [ 41.653459] Freed by task 204: [ 41.653892] kasan_save_stack+0x22/0x50 [ 41.654443] kasan_set_track+0x25/0x30 [ 41.655002] kasan_save_free_info+0x2b/0x50 [ 41.655580] __kasan_slab_free+0x10a/0x190 [ 41.656157] kmem_cache_free+0x10d/0x4d0 [ 41.656712] rcu_core+0x8c8/0x2860 [ 41.657196] __do_softirq+0x1b7/0x7d4 [ 41.657716] [ 41.657951] Last potentially related work creation: [ 41.658593] kasan_save_stack+0x22/0x50 [ 41.659155] __kasan_record_aux_stack+0x8e/0xa0 [ 41.659786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.660491] remove_vma+0x139/0x170 [ 41.660987] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.661602] do_vmi_munmap+0x1f1/0x2b0 [ 41.662133] __vm_munmap+0x138/0x3a0 [ 41.662648] __x64_sys_munmap+0x59/0x80 [ 41.663218] do_syscall_64+0x3f/0x90 [ 41.663738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.664441] [ 41.664677] Second to last potentially related work creation: [ 41.665427] kasan_save_stack+0x22/0x50 [ 41.665978] __kasan_record_aux_stack+0x8e/0xa0 [ 41.666610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.667323] remove_vma+0x139/0x170 [ 41.667819] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.668427] do_vmi_munmap+0x1f1/0x2b0 [ 41.668957] mmap_region+0x1f9/0x2660 [ 41.669477] do_mmap+0x854/0xf00 [ 41.669947] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.670481] ksys_mmap_pgoff+0x3af/0x500 [ 41.671044] do_syscall_64+0x3f/0x90 [ 41.671562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.672262] [ 41.672500] The buggy address belongs to the object at ffff88800da263a0 [ 41.672500] which belongs to the cache vm_area_struct of size 168 [ 41.674116] The buggy address is located 88 bytes inside of [ 41.674116] freed 168-byte region [ffff88800da263a0, ffff88800da26448) [ 41.675677] [ 41.675911] The buggy address belongs to the physical page: [ 41.676633] page:000000004f15d495 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda26 [ 41.677818] memcg:ffff88800e4ab901 [ 41.678288] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.679008] page_type: 0xffffffff() [ 41.679504] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 41.680508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4ab901 [ 41.681504] page dumped because: kasan: bad access detected [ 41.682234] [ 41.682468] Memory state around the buggy address: [ 41.683127] ffff88800da26280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.684070] ffff88800da26300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.685008] >ffff88800da26380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.685941] ^ [ 41.686881] ffff88800da26400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.687826] ffff88800da26480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.688767] ================================================================== [ 41.690099] Disabling lock debugging due to kernel taint [ 43.556878] BUG: Bad rss-counter state mm:000000004143b921 type:MM_FILEPAGES val:33 [ 43.557969] BUG: Bad rss-counter state mm:000000004143b921 type:MM_ANONPAGES val:22 [ 44.081832] BUG: Bad rss-counter state mm:00000000c7f4651d type:MM_FILEPAGES val:33 [ 44.083034] BUG: Bad rss-counter state mm:00000000c7f4651d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9332' (ECDSA) to the list of known hosts. 2023/06/19 19:13:14 fuzzer started 2023/06/19 19:13:14 dialing manager at localhost:44161 2023/06/19 19:13:14 checking machine... 2023/06/19 19:13:14 checking revisions... [ 44.754894] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:13:14 testing simple program... [ 44.799902] cgroup: Unknown subsys name 'net' [ 44.835560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:13:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff87b69480 RCX=0000000000000000 RDX=1ffffffff0f6d2a7 RSI=ffffffff813cc3a2 RDI=ffffffff87b69538 RBP=0000000000000000 RSP=ffff88806ce09cb0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000000 R11=ffff88806ce09ff8 R12=7fffffffffffffff R13=003b9aca00000000 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff813c61f1 RFL=00000046 [---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 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=00007ffe58b92df8 CR3=0000000005482000 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=00007fa1066465100000555d1d3dd790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8137ab10 RBX=000000000000000a RCX=ffffffff84531e74 RDX=dffffc0000000000 RSI=dffffc0000000000 RDI=ffffffff8540a108 RBP=ffffffff8540a108 RSP=ffff88806cf09f78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff813779ea 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 00007f7a4bf1a900 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=00007fcde55d3650 CR3=000000000d96a000 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=d27fa8203c761a5300000000000ae988 XMM05=fdbda2f2e9ffbdf10000000000136138 XMM06=19e9129bd510f2350000000000134c60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000