syzkaller login: [ 31.705842] BUG: Bad rss-counter state mm:000000006afa5731 type:MM_FILEPAGES val:33 [ 31.707066] BUG: Bad rss-counter state mm:000000006afa5731 type:MM_ANONPAGES val:22 [ 31.740824] ================================================================== [ 31.741949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.742895] Read of size 8 at addr ffff88800dfae058 by task sshd/219 [ 31.743818] [ 31.744045] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.744923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.745893] Call Trace: [ 31.746216] [ 31.746510] dump_stack_lvl+0x91/0xf0 [ 31.747000] print_report+0xcc/0x620 [ 31.747489] ? __virt_addr_valid+0x102/0x340 [ 31.748050] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.748668] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749274] kasan_report+0xbe/0xf0 [ 31.749741] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.750356] vma_interval_tree_remove+0xc75/0xec0 [ 31.750960] vma_prepare+0xc54/0x11a0 [ 31.751440] __split_vma+0x5af/0x950 [ 31.751933] ? __pfx___split_vma+0x10/0x10 [ 31.752477] ? find_held_lock+0x2c/0x110 [ 31.753013] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.753574] ? lock_is_held_type+0x9f/0x120 [ 31.754121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.754746] ? mtree_range_walk+0x632/0x900 [ 31.755300] ? mas_walk+0x5c7/0x7c0 [ 31.755778] do_vmi_munmap+0x1f1/0x2b0 [ 31.756277] mmap_region+0x1f9/0x2660 [ 31.756759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.757272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.757984] ? __pfx_lock_acquire+0x10/0x10 [ 31.758520] ? __pfx_mmap_region+0x10/0x10 [ 31.759054] ? security_mmap_addr+0x7d/0xa0 [ 31.759588] ? get_unmapped_area+0x1f5/0x3f0 [ 31.760152] do_mmap+0x854/0xf00 [ 31.760603] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.761099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.761662] ksys_mmap_pgoff+0x3af/0x500 [ 31.762166] do_syscall_64+0x3f/0x90 [ 31.762659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.763314] RIP: 0033:0x7f35f0bd6d82 [ 31.763781] 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 [ 31.765926] RSP: 002b:00007fff72c4c3f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.766832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35f0bd6d82 [ 31.767677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35f0010000 [ 31.768544] RBP: 00007f35f0010000 R08: 0000000000000009 R09: 0000000000001000 [ 31.769387] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e02a4beec0 [ 31.770439] R13: 00007fff72c4c410 R14: 00007fff72c4c440 R15: 00007fff72c4c7a0 [ 31.771289] [ 31.771584] [ 31.771799] Allocated by task 212: [ 31.772274] kasan_save_stack+0x22/0x50 [ 31.772779] kasan_set_track+0x25/0x30 [ 31.773273] __kasan_slab_alloc+0x59/0x70 [ 31.773793] kmem_cache_alloc+0x16b/0x370 [ 31.774306] vm_area_dup+0x20/0x160 [ 31.774763] __split_vma+0x170/0x950 [ 31.775225] split_vma+0xc6/0x110 [ 31.775661] mprotect_fixup+0x8d2/0xb30 [ 31.776171] do_mprotect_pkey+0x87e/0xd40 [ 31.776690] __x64_sys_mprotect+0x78/0xc0 [ 31.777204] do_syscall_64+0x3f/0x90 [ 31.777680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778335] [ 31.778552] Freed by task 212: [ 31.778942] kasan_save_stack+0x22/0x50 [ 31.779448] kasan_set_track+0x25/0x30 [ 31.779963] kasan_save_free_info+0x2b/0x50 [ 31.780495] __kasan_slab_free+0x10a/0x190 [ 31.781025] kmem_cache_free+0x10d/0x4d0 [ 31.781530] rcu_core+0x8c8/0x2860 [ 31.781976] __do_softirq+0x1b7/0x7d4 [ 31.782457] [ 31.782672] Last potentially related work creation: [ 31.783266] kasan_save_stack+0x22/0x50 [ 31.783773] __kasan_record_aux_stack+0x8e/0xa0 [ 31.784359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.785008] remove_vma+0x139/0x170 [ 31.785454] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.786011] do_vmi_munmap+0x1f1/0x2b0 [ 31.786496] __vm_munmap+0x138/0x3a0 [ 31.786967] __x64_sys_munmap+0x59/0x80 [ 31.787461] do_syscall_64+0x3f/0x90 [ 31.787944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788583] [ 31.788797] The buggy address belongs to the object at ffff88800dfae000 [ 31.788797] which belongs to the cache vm_area_struct of size 168 [ 31.790296] The buggy address is located 88 bytes inside of [ 31.790296] freed 168-byte region [ffff88800dfae000, ffff88800dfae0a8) [ 31.791739] [ 31.791977] The buggy address belongs to the physical page: [ 31.792640] page:00000000fb707f85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfae [ 31.793760] memcg:ffff88800d7a2e01 [ 31.794228] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.794942] page_type: 0xffffffff() [ 31.795422] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.796406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7a2e01 [ 31.797329] page dumped because: kasan: bad access detected [ 31.797992] [ 31.798205] Memory state around the buggy address: [ 31.798785] ffff88800dfadf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.799636] ffff88800dfadf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.800506] >ffff88800dfae000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.801357] ^ [ 31.802082] ffff88800dfae080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.802938] ffff88800dfae100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.803790] ================================================================== [ 31.804721] Disabling lock debugging due to kernel taint [ 33.588710] BUG: Bad rss-counter state mm:00000000118bc457 type:MM_FILEPAGES val:33 [ 33.589369] BUG: Bad rss-counter state mm:00000000118bc457 type:MM_ANONPAGES val:22 [ 34.035669] BUG: Bad rss-counter state mm:00000000192771c9 type:MM_FILEPAGES val:33 [ 34.036690] BUG: Bad rss-counter state mm:00000000192771c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61414' (ECDSA) to the list of known hosts. 2023/06/20 11:52:18 fuzzer started 2023/06/20 11:52:19 dialing manager at localhost:36067 2023/06/20 11:52:19 checking machine... 2023/06/20 11:52:19 checking revisions... [ 34.835093] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:52:19 testing simple program... [ 34.881278] cgroup: Unknown subsys name 'net' [ 34.926621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:52:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880084409c0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888010247b40 RBP=1ffff11002048f64 RSP=ffff888010247b18 R8 =0000000000000001 R9 =ffffed1002048f68 R10=0000000000000003 R11=0000000000070006 R12=ffff8880084409c8 R13=ffff8880084409d0 R14=0000000000040000 R15=ffff888008442140 RIP=ffffffff812e0146 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 00007f80ea22c900 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=00007f80e96c3fc0 CR3=000000000d7fe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f7c914972351fabb00000000000ae988 XMM05=0e1640067224848f0000000000132830 XMM06=806171799158d9670000000000131620 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888010237438 RCX=ffff888010237410 RDX=1ffff11002046e89 RSI=ffffffff813ad720 RDI=ffff888010237448 RBP=ffff888010237408 RSP=ffff888010237358 R8 =0000000000000001 R9 =ffff8880102373b0 R10=0000000000038001 R11=0000000000003c0d R12=ffff888010237438 R13=0000000000000000 R14=ffff888016581b40 R15=0000000000002000 RIP=ffffffff813ad48e RFL=00000212 [----A--] 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 00007f471cd92900 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=00007ffca6fe8ff8 CR3=0000000014672000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000