syzkaller login: [ 43.278928] BUG: Bad rss-counter state mm:000000003053df63 type:MM_FILEPAGES val:33 [ 43.280887] BUG: Bad rss-counter state mm:000000003053df63 type:MM_ANONPAGES val:22 [ 43.454518] ================================================================== [ 43.455520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.456535] Read of size 8 at addr ffff88800983b058 by task sshd/219 [ 43.457453] [ 43.457684] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.458592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.459647] Call Trace: [ 43.459989] [ 43.460289] dump_stack_lvl+0x91/0xf0 [ 43.460846] print_report+0xcc/0x620 [ 43.461367] ? __virt_addr_valid+0x102/0x340 [ 43.461962] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.462631] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.463295] kasan_report+0xbe/0xf0 [ 43.463808] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.464489] vma_interval_tree_remove+0xc75/0xec0 [ 43.465139] vma_prepare+0xc54/0x11a0 [ 43.465653] __split_vma+0x5af/0x950 [ 43.466170] ? __pfx___split_vma+0x10/0x10 [ 43.466733] ? find_held_lock+0x2c/0x110 [ 43.467292] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.467905] ? lock_is_held_type+0x9f/0x120 [ 43.468510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.469173] ? mtree_range_walk+0x632/0x900 [ 43.469780] ? mas_walk+0x5c7/0x7c0 [ 43.470308] do_vmi_munmap+0x1f1/0x2b0 [ 43.470852] mmap_region+0x1f9/0x2660 [ 43.471385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.471951] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.472741] ? __pfx_lock_acquire+0x10/0x10 [ 43.473329] ? __pfx_mmap_region+0x10/0x10 [ 43.473912] ? security_mmap_addr+0x7d/0xa0 [ 43.474497] ? get_unmapped_area+0x1f5/0x3f0 [ 43.475145] do_mmap+0x854/0xf00 [ 43.475632] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.476189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.476830] ksys_mmap_pgoff+0x3af/0x500 [ 43.477389] do_syscall_64+0x3f/0x90 [ 43.477915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.478621] RIP: 0033:0x7fccd81aed82 [ 43.479128] 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 [ 43.481482] RSP: 002b:00007ffd9c815e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.482478] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccd81aed82 [ 43.483411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccd75e8000 [ 43.484347] RBP: 00007fccd75e8000 R08: 0000000000000009 R09: 0000000000001000 [ 43.485300] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e00f4ddec0 [ 43.486232] R13: 00007ffd9c815e70 R14: 00007ffd9c815ea0 R15: 00007ffd9c816200 [ 43.487182] [ 43.487505] [ 43.487743] Allocated by task 212: [ 43.488215] kasan_save_stack+0x22/0x50 [ 43.488779] kasan_set_track+0x25/0x30 [ 43.489323] __kasan_slab_alloc+0x59/0x70 [ 43.489905] kmem_cache_alloc+0x16b/0x370 [ 43.490474] vm_area_dup+0x20/0x160 [ 43.490975] __split_vma+0x170/0x950 [ 43.491488] split_vma+0xc6/0x110 [ 43.491968] mprotect_fixup+0x8d2/0xb30 [ 43.492531] do_mprotect_pkey+0x87e/0xd40 [ 43.493110] __x64_sys_mprotect+0x78/0xc0 [ 43.493681] do_syscall_64+0x3f/0x90 [ 43.494204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.494909] [ 43.495148] Freed by task 212: [ 43.495579] kasan_save_stack+0x22/0x50 [ 43.496135] kasan_set_track+0x25/0x30 [ 43.496698] kasan_save_free_info+0x2b/0x50 [ 43.497286] __kasan_slab_free+0x10a/0x190 [ 43.497875] kmem_cache_free+0x10d/0x4d0 [ 43.498434] rcu_core+0x8c8/0x2860 [ 43.498928] __do_softirq+0x1b7/0x7d4 [ 43.499460] [ 43.499689] Last potentially related work creation: [ 43.500327] kasan_save_stack+0x22/0x50 [ 43.500873] __kasan_record_aux_stack+0x8e/0xa0 [ 43.501487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.502173] remove_vma+0x139/0x170 [ 43.502653] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.503245] do_vmi_munmap+0x1f1/0x2b0 [ 43.503760] __vm_munmap+0x138/0x3a0 [ 43.504257] __x64_sys_munmap+0x59/0x80 [ 43.504799] do_syscall_64+0x3f/0x90 [ 43.505305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.505996] [ 43.506230] Second to last potentially related work creation: [ 43.506953] kasan_save_stack+0x22/0x50 [ 43.507489] __kasan_record_aux_stack+0x8e/0xa0 [ 43.508106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.508824] remove_vma+0x139/0x170 [ 43.509315] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.509925] do_vmi_munmap+0x1f1/0x2b0 [ 43.510456] mmap_region+0x1f9/0x2660 [ 43.510977] do_mmap+0x854/0xf00 [ 43.511448] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.511972] ksys_mmap_pgoff+0x3af/0x500 [ 43.512528] do_syscall_64+0x3f/0x90 [ 43.513043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.513735] [ 43.513966] The buggy address belongs to the object at ffff88800983b000 [ 43.513966] which belongs to the cache vm_area_struct of size 168 [ 43.515573] The buggy address is located 88 bytes inside of [ 43.515573] freed 168-byte region [ffff88800983b000, ffff88800983b0a8) [ 43.517109] [ 43.517347] The buggy address belongs to the physical page: [ 43.518066] page:000000003a469a99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x983b [ 43.519257] memcg:ffff88800eab4e01 [ 43.519719] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.520419] page_type: 0xffffffff() [ 43.520925] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.521936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eab4e01 [ 43.522928] page dumped because: kasan: bad access detected [ 43.523653] [ 43.523889] Memory state around the buggy address: [ 43.524534] ffff88800983af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.525462] ffff88800983af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.526398] >ffff88800983b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.527323] ^ [ 43.528127] ffff88800983b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 43.529084] ffff88800983b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.530028] ================================================================== [ 43.531140] Disabling lock debugging due to kernel taint [ 45.768893] BUG: Bad rss-counter state mm:0000000089b0b9f4 type:MM_FILEPAGES val:33 [ 45.769950] BUG: Bad rss-counter state mm:0000000089b0b9f4 type:MM_ANONPAGES val:22 [ 46.233354] BUG: Bad rss-counter state mm:000000001c206afd type:MM_FILEPAGES val:33 [ 46.234293] BUG: Bad rss-counter state mm:000000001c206afd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3723' (ECDSA) to the list of known hosts. 2023/06/20 00:17:36 fuzzer started 2023/06/20 00:17:36 dialing manager at localhost:44161 2023/06/20 00:17:36 checking machine... 2023/06/20 00:17:36 checking revisions... [ 47.010990] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:17:36 testing simple program... [ 47.070741] cgroup: Unknown subsys name 'net' [ 47.139321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:31 Registers: info registers vcpu 0 RAX=ffffffff8180f43b RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11002d88f46 RSI=ffffffff8180f43b RDI=ffff888016c47aa0 RBP=ffff888016c47a70 RSP=ffff888016c479d0 R8 =ffffffff86137542 R9 =ffff888016c47a18 R10=0000000000038001 R11=0000000000020d8a R12=ffff888016c47aa0 R13=0000000000000000 R14=ffff888006811b40 R15=ffff88800d7d3ec0 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f386c22e900 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=00007f386b647660 CR3=000000000c7b2000 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=4fb83d0a28f03b9afc4e411d026df84b XMM02=000000000011d990d59e07bde36eea69 XMM03=000000000011dab8ec2efd57dc4c00df XMM04=b291433a88ed144c00000000000ae988 XMM05=117b4ee597e19e4c0000000000136510 XMM06=806171799158d9670000000000134f90 XMM07=fb795ef6d65770560000000000124478 XMM08=2c67c8bc2e329bc3000000000011dab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff8613da01 RDX=ffff8880147ef790 RSI=0000000000000000 RDI=ffff8880147ef570 RBP=ffff8880147ef5f8 RSP=ffff8880147ef560 R8 =ffffffff8613daa0 R9 =ffff8880147ef5a0 R10=0000000000038001 R11=0000000000021e78 R12=ffff8880147ef628 R13=0000000000000000 R14=ffff888015cfb680 R15=ffff88800fea7980 RIP=ffffffff810bd057 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 00007f8d609f1900 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=00007ffe03b71000 CR3=000000001668e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000