syzkaller login: [ 30.804693] BUG: Bad rss-counter state mm:00000000b00a1616 type:MM_FILEPAGES val:33 [ 30.806050] BUG: Bad rss-counter state mm:00000000b00a1616 type:MM_ANONPAGES val:22 [ 30.848966] ================================================================== [ 30.850080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.851170] Read of size 8 at addr ffff88800c48b798 by task sshd/220 [ 30.852215] [ 30.852449] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.853426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.854494] Call Trace: [ 30.854841] [ 30.855258] dump_stack_lvl+0x91/0xf0 [ 30.855778] print_report+0xcc/0x620 [ 30.856278] ? __virt_addr_valid+0x102/0x340 [ 30.856853] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.857487] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858131] kasan_report+0xbe/0xf0 [ 30.858622] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859271] vma_interval_tree_remove+0xc75/0xec0 [ 30.859926] vma_prepare+0xc54/0x11a0 [ 30.860422] __split_vma+0x5af/0x950 [ 30.860914] ? __pfx___split_vma+0x10/0x10 [ 30.861468] ? find_held_lock+0x2c/0x110 [ 30.862009] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.862600] ? lock_is_held_type+0x9f/0x120 [ 30.863169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.863822] ? mtree_range_walk+0x632/0x900 [ 30.864394] ? mas_walk+0x5c7/0x7c0 [ 30.864894] do_vmi_munmap+0x1f1/0x2b0 [ 30.865409] mmap_region+0x1f9/0x2660 [ 30.865915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.866459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.867208] ? __pfx_lock_acquire+0x10/0x10 [ 30.867776] ? __pfx_mmap_region+0x10/0x10 [ 30.868326] ? security_mmap_addr+0x7d/0xa0 [ 30.868880] ? get_unmapped_area+0x1f5/0x3f0 [ 30.869460] do_mmap+0x854/0xf00 [ 30.869913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.870423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.871007] ksys_mmap_pgoff+0x3af/0x500 [ 30.871545] do_syscall_64+0x3f/0x90 [ 30.872052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872727] RIP: 0033:0x7f3423dfcd82 [ 30.873206] 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 [ 30.875432] RSP: 002b:00007ffea804f5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.876367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3423dfcd82 [ 30.877251] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3423236000 [ 30.878140] RBP: 00007f3423236000 R08: 0000000000000009 R09: 0000000000001000 [ 30.879024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0f42c3d90 [ 30.879924] R13: 00007ffea804f610 R14: 00007ffea804f640 R15: 00007ffea804f9a0 [ 30.880818] [ 30.881119] [ 30.881338] Allocated by task 213: [ 30.881788] kasan_save_stack+0x22/0x50 [ 30.882309] kasan_set_track+0x25/0x30 [ 30.882822] __kasan_slab_alloc+0x59/0x70 [ 30.883374] kmem_cache_alloc+0x16b/0x370 [ 30.883891] vm_area_dup+0x20/0x160 [ 30.884342] __split_vma+0x170/0x950 [ 30.884809] split_vma+0xc6/0x110 [ 30.885247] mprotect_fixup+0x8d2/0xb30 [ 30.885755] do_mprotect_pkey+0x87e/0xd40 [ 30.886279] __x64_sys_mprotect+0x78/0xc0 [ 30.886798] do_syscall_64+0x3f/0x90 [ 30.887269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887920] [ 30.888135] Freed by task 213: [ 30.888523] kasan_save_stack+0x22/0x50 [ 30.889028] kasan_set_track+0x25/0x30 [ 30.889514] kasan_save_free_info+0x2b/0x50 [ 30.890045] __kasan_slab_free+0x10a/0x190 [ 30.890577] kmem_cache_free+0x10d/0x4d0 [ 30.891089] rcu_core+0x8c8/0x2860 [ 30.891550] __do_softirq+0x1b7/0x7d4 [ 30.892022] [ 30.892235] Last potentially related work creation: [ 30.892819] kasan_save_stack+0x22/0x50 [ 30.893329] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.894605] remove_vma+0x139/0x170 [ 30.895055] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.895634] do_vmi_munmap+0x1f1/0x2b0 [ 30.896125] __vm_munmap+0x138/0x3a0 [ 30.896589] __x64_sys_munmap+0x59/0x80 [ 30.897093] do_syscall_64+0x3f/0x90 [ 30.897571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898209] [ 30.898424] The buggy address belongs to the object at ffff88800c48b740 [ 30.898424] which belongs to the cache vm_area_struct of size 168 [ 30.899905] The buggy address is located 88 bytes inside of [ 30.899905] freed 168-byte region [ffff88800c48b740, ffff88800c48b7e8) [ 30.901325] [ 30.901538] The buggy address belongs to the physical page: [ 30.902191] page:00000000eda2b0d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc48b [ 30.903281] memcg:ffff88801662bd01 [ 30.903725] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.904366] page_type: 0xffffffff() [ 30.904826] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.905754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801662bd01 [ 30.906668] page dumped because: kasan: bad access detected [ 30.907327] [ 30.907559] Memory state around the buggy address: [ 30.908138] ffff88800c48b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.908990] ffff88800c48b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.909842] >ffff88800c48b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.910702] ^ [ 30.911211] ffff88800c48b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.912087] ffff88800c48b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.912939] ================================================================== [ 30.913876] Disabling lock debugging due to kernel taint [ 32.852760] BUG: Bad rss-counter state mm:00000000794316f5 type:MM_FILEPAGES val:33 [ 32.853696] BUG: Bad rss-counter state mm:00000000794316f5 type:MM_ANONPAGES val:22 [ 33.386700] BUG: Bad rss-counter state mm:000000002d96a1f5 type:MM_FILEPAGES val:33 [ 33.387883] BUG: Bad rss-counter state mm:000000002d96a1f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55588' (ECDSA) to the list of known hosts. 2023/06/20 18:47:05 fuzzer started 2023/06/20 18:47:05 dialing manager at localhost:36067 2023/06/20 18:47:05 checking machine... 2023/06/20 18:47:05 checking revisions... [ 34.006890] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:47:05 testing simple program... [ 34.070877] cgroup: Unknown subsys name 'net' [ 34.125234] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c60bd1 RDX=ffff88800f4c51c0 RSI=00000000000000c4 RDI=00000000000000ff RBP=0000000000000000 RSP=ffff888015d6f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000c3 R11=000009b7000009b7 R12=0000000000000000 R13=00000000000000c4 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0408 RFL=00000202 [-------] 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 00007ff5cd641900 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=00007ff5cdbf8618 CR3=0000000016c00000 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=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864b3701 RDX=ffff888008e07e80 RSI=0000000000000000 RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =ffffffff864b37a6 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b546d R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801807dcf0 RIP=ffffffff81130340 RFL=00000202 [-------] 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 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=00007fd305c70018 CR3=000000000ec4c000 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=29e8a528dad3df98fc408ad29b0e9493 XMM02=000000000011a2c8ec2efd57dc4c00df XMM03=0000000000121b70f6748de36533f493 XMM04=288dc16a8f4b777400000000000ae988 XMM05=19e9129bd510f23500000000001319d0 XMM06=f847bb57ca10ce8b0000000000130838 XMM07=e042d86d42eb936e0000000000121df0 XMM08=f6748de36533f493000000000011a328 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000