syzkaller login: [ 40.420125] BUG: Bad rss-counter state mm:000000002025b2d1 type:MM_FILEPAGES val:33 [ 40.421361] BUG: Bad rss-counter state mm:000000002025b2d1 type:MM_ANONPAGES val:22 [ 40.589520] ================================================================== [ 40.590597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.591865] Read of size 8 at addr ffff8880166caed8 by task sshd/220 [ 40.592786] [ 40.593048] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.594100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.595148] Call Trace: [ 40.595470] [ 40.595758] dump_stack_lvl+0x91/0xf0 [ 40.596261] print_report+0xcc/0x620 [ 40.596757] ? __virt_addr_valid+0x102/0x340 [ 40.597327] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.597944] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.598577] kasan_report+0xbe/0xf0 [ 40.599051] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.599671] vma_interval_tree_remove+0xc75/0xec0 [ 40.600283] vma_prepare+0xc54/0x11a0 [ 40.600766] __split_vma+0x5af/0x950 [ 40.601235] ? __pfx___split_vma+0x10/0x10 [ 40.601760] ? find_held_lock+0x2c/0x110 [ 40.602320] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.602887] ? lock_is_held_type+0x9f/0x120 [ 40.603426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.604026] ? mtree_range_walk+0x632/0x900 [ 40.604588] ? mas_walk+0x5c7/0x7c0 [ 40.605069] do_vmi_munmap+0x1f1/0x2b0 [ 40.605573] mmap_region+0x1f9/0x2660 [ 40.606061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.606596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.607324] ? __pfx_lock_acquire+0x10/0x10 [ 40.607862] ? __pfx_mmap_region+0x10/0x10 [ 40.608403] ? security_mmap_addr+0x7d/0xa0 [ 40.608946] ? get_unmapped_area+0x1f5/0x3f0 [ 40.609492] do_mmap+0x854/0xf00 [ 40.609930] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.610447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.611019] ksys_mmap_pgoff+0x3af/0x500 [ 40.611545] do_syscall_64+0x3f/0x90 [ 40.612035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.612680] RIP: 0033:0x7f846cc12d82 [ 40.613141] 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 [ 40.615297] RSP: 002b:00007ffc441e0c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.616199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f846cc12d82 [ 40.617055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f846c04c000 [ 40.617915] RBP: 00007f846c04c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.618761] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e60dfa0ec0 [ 40.619612] R13: 00007ffc441e0c20 R14: 00007ffc441e0c50 R15: 00007ffc441e0fb0 [ 40.620468] [ 40.620760] [ 40.620973] Allocated by task 213: [ 40.621418] kasan_save_stack+0x22/0x50 [ 40.621935] kasan_set_track+0x25/0x30 [ 40.622449] __kasan_slab_alloc+0x59/0x70 [ 40.622981] kmem_cache_alloc+0x16b/0x370 [ 40.623498] vm_area_dup+0x20/0x160 [ 40.623958] __split_vma+0x170/0x950 [ 40.624422] split_vma+0xc6/0x110 [ 40.624910] mprotect_fixup+0x8d2/0xb30 [ 40.625428] do_mprotect_pkey+0x87e/0xd40 [ 40.625980] __x64_sys_mprotect+0x78/0xc0 [ 40.626521] do_syscall_64+0x3f/0x90 [ 40.627011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.627672] [ 40.627889] Freed by task 210: [ 40.628283] kasan_save_stack+0x22/0x50 [ 40.628805] kasan_set_track+0x25/0x30 [ 40.629298] kasan_save_free_info+0x2b/0x50 [ 40.629920] __kasan_slab_free+0x10a/0x190 [ 40.630675] kmem_cache_free+0x10d/0x4d0 [ 40.631195] rcu_core+0x8c8/0x2860 [ 40.631652] __do_softirq+0x1b7/0x7d4 [ 40.632134] [ 40.632351] Last potentially related work creation: [ 40.632966] kasan_save_stack+0x22/0x50 [ 40.633476] __kasan_record_aux_stack+0x8e/0xa0 [ 40.634060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.634764] remove_vma+0x139/0x170 [ 40.635219] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.635792] do_vmi_munmap+0x1f1/0x2b0 [ 40.636278] __vm_munmap+0x138/0x3a0 [ 40.636764] __x64_sys_munmap+0x59/0x80 [ 40.637261] do_syscall_64+0x3f/0x90 [ 40.637763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.638538] [ 40.638765] The buggy address belongs to the object at ffff8880166cae80 [ 40.638765] which belongs to the cache vm_area_struct of size 168 [ 40.640228] The buggy address is located 88 bytes inside of [ 40.640228] freed 168-byte region [ffff8880166cae80, ffff8880166caf28) [ 40.641632] [ 40.641845] The buggy address belongs to the physical page: [ 40.642547] page:0000000089f3c296 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166ca [ 40.643711] memcg:ffff88800ebda401 [ 40.644254] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.645048] page_type: 0xffffffff() [ 40.645613] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.646762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebda401 [ 40.647879] page dumped because: kasan: bad access detected [ 40.648703] [ 40.648965] Memory state around the buggy address: [ 40.649696] ffff8880166cad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.650769] ffff8880166cae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.651834] >ffff8880166cae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.652898] ^ [ 40.653811] ffff8880166caf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.654908] ffff8880166caf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.655840] ================================================================== [ 40.656808] Disabling lock debugging due to kernel taint [ 42.597709] BUG: Bad rss-counter state mm:0000000070a63449 type:MM_FILEPAGES val:33 [ 42.598787] BUG: Bad rss-counter state mm:0000000070a63449 type:MM_ANONPAGES val:22 [ 43.083282] BUG: Bad rss-counter state mm:00000000b3cc1b95 type:MM_FILEPAGES val:33 [ 43.084546] BUG: Bad rss-counter state mm:00000000b3cc1b95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11574' (ECDSA) to the list of known hosts. 2023/06/19 18:48:28 fuzzer started 2023/06/19 18:48:28 dialing manager at localhost:44161 2023/06/19 18:48:28 checking machine... 2023/06/19 18:48:28 checking revisions... [ 43.813282] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:48:28 testing simple program... [ 43.852079] cgroup: Unknown subsys name 'net' [ 43.892126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:17 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09cd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce361a0 R13=ffffffff81830685 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180f009 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 00007f58b66b8900 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=00007f396e152200 CR3=000000000c688000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f58b6c6f618 CR3=000000000c688000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000