syzkaller login: [ 32.306387] BUG: Bad rss-counter state mm:0000000079206ea3 type:MM_FILEPAGES val:33 [ 32.307869] BUG: Bad rss-counter state mm:0000000079206ea3 type:MM_ANONPAGES val:22 [ 32.412905] ================================================================== [ 32.413893] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.414608] Read of size 8 at addr ffff888009652058 by task sshd/220 [ 32.415195] [ 32.415366] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.416149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.416896] Call Trace: [ 32.417144] [ 32.417360] dump_stack_lvl+0x91/0xf0 [ 32.417734] print_report+0xcc/0x620 [ 32.418120] ? __virt_addr_valid+0x102/0x340 [ 32.418542] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.419014] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.419480] kasan_report+0xbe/0xf0 [ 32.419842] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.420317] vma_interval_tree_remove+0xc75/0xec0 [ 32.420776] vma_prepare+0xc54/0x11a0 [ 32.421146] __split_vma+0x5af/0x950 [ 32.421510] ? __pfx___split_vma+0x10/0x10 [ 32.421924] ? find_held_lock+0x2c/0x110 [ 32.422347] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.422793] ? lock_is_held_type+0x9f/0x120 [ 32.423217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.423698] ? mtree_range_walk+0x632/0x900 [ 32.424134] ? mas_walk+0x5c7/0x7c0 [ 32.424516] do_vmi_munmap+0x1f1/0x2b0 [ 32.424905] mmap_region+0x1f9/0x2660 [ 32.425304] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.425704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.426126] ? __pfx_lock_acquire+0x10/0x10 [ 32.426436] ? __pfx_mmap_region+0x10/0x10 [ 32.426737] ? security_mmap_addr+0x7d/0xa0 [ 32.427038] ? get_unmapped_area+0x1f5/0x3f0 [ 32.427350] do_mmap+0x854/0xf00 [ 32.427603] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.427883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.428204] ksys_mmap_pgoff+0x3af/0x500 [ 32.428498] do_syscall_64+0x3f/0x90 [ 32.428781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.429160] RIP: 0033:0x7f3efc4b2d82 [ 32.429426] 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 [ 32.430642] RSP: 002b:00007ffdb0b242b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.431163] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3efc4b2d82 [ 32.431644] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3efb8ec000 [ 32.432124] RBP: 00007f3efb8ec000 R08: 0000000000000009 R09: 0000000000001000 [ 32.432606] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd6a74aec0 [ 32.433087] R13: 00007ffdb0b242d0 R14: 00007ffdb0b24300 R15: 00007ffdb0b24660 [ 32.433576] [ 32.433743] [ 32.433865] Allocated by task 213: [ 32.434109] kasan_save_stack+0x22/0x50 [ 32.434395] kasan_set_track+0x25/0x30 [ 32.434672] __kasan_slab_alloc+0x59/0x70 [ 32.434969] kmem_cache_alloc+0x16b/0x370 [ 32.435261] vm_area_dup+0x20/0x160 [ 32.435516] __split_vma+0x170/0x950 [ 32.435781] split_vma+0xc6/0x110 [ 32.436030] mprotect_fixup+0x8d2/0xb30 [ 32.436317] do_mprotect_pkey+0x87e/0xd40 [ 32.436607] __x64_sys_mprotect+0x78/0xc0 [ 32.436905] do_syscall_64+0x3f/0x90 [ 32.437183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.437548] [ 32.437667] Freed by task 213: [ 32.437897] kasan_save_stack+0x22/0x50 [ 32.438178] kasan_set_track+0x25/0x30 [ 32.438458] kasan_save_free_info+0x2b/0x50 [ 32.438758] __kasan_slab_free+0x10a/0x190 [ 32.439065] kmem_cache_free+0x10d/0x4d0 [ 32.439354] rcu_core+0x8c8/0x2860 [ 32.439614] __do_softirq+0x1b7/0x7d4 [ 32.439882] [ 32.440001] Last potentially related work creation: [ 32.440356] kasan_save_stack+0x22/0x50 [ 32.440649] __kasan_record_aux_stack+0x8e/0xa0 [ 32.440974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.441345] remove_vma+0x139/0x170 [ 32.441607] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.441926] do_vmi_munmap+0x1f1/0x2b0 [ 32.442206] __vm_munmap+0x138/0x3a0 [ 32.442480] __x64_sys_munmap+0x59/0x80 [ 32.442769] do_syscall_64+0x3f/0x90 [ 32.443041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.443414] [ 32.443533] The buggy address belongs to the object at ffff888009652000 [ 32.443533] which belongs to the cache vm_area_struct of size 168 [ 32.444385] The buggy address is located 88 bytes inside of [ 32.444385] freed 168-byte region [ffff888009652000, ffff8880096520a8) [ 32.445216] [ 32.445343] The buggy address belongs to the physical page: [ 32.445730] page:0000000002310d9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9652 [ 32.446358] memcg:ffff88800e170301 [ 32.446597] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.446955] page_type: 0xffffffff() [ 32.447199] raw: 0100000000000200 ffff88800879fc80 ffffea0000389280 dead000000000002 [ 32.447696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e170301 [ 32.448188] page dumped because: kasan: bad access detected [ 32.448545] [ 32.448661] Memory state around the buggy address: [ 32.448976] ffff888009651f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.449446] ffff888009651f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.449907] >ffff888009652000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.450364] ^ [ 32.450754] ffff888009652080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.451216] ffff888009652100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.451676] ================================================================== [ 32.452206] Disabling lock debugging due to kernel taint [ 34.186362] BUG: Bad rss-counter state mm:00000000f96226de type:MM_FILEPAGES val:33 [ 34.187667] BUG: Bad rss-counter state mm:00000000f96226de type:MM_ANONPAGES val:22 [ 34.624886] BUG: Bad rss-counter state mm:000000004ffde205 type:MM_FILEPAGES val:33 [ 34.625608] BUG: Bad rss-counter state mm:000000004ffde205 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55348' (ECDSA) to the list of known hosts. 2023/06/20 08:36:58 fuzzer started 2023/06/20 08:36:58 dialing manager at localhost:44161 2023/06/20 08:36:58 checking machine... 2023/06/20 08:36:58 checking revisions... [ 35.313607] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:36:58 testing simple program... [ 35.361661] cgroup: Unknown subsys name 'net' [ 35.408159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11001e3ff43 RDX=dffffc0000000000 RSI=ffffffff81390b1d RDI=ffff88800f1ff9c0 RBP=ffff88800f1ffa18 RSP=ffff88800f1ff950 R8 =0000000000000001 R9 =ffff88800f1ffa00 R10=0000000000038001 R11=0000000000009789 R12=ffff88800f1ffa20 R13=ffff88800f1ffa08 R14=ffff88800f1ffa01 R15=ffff88800f1ff9c0 RIP=ffffffff81130706 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 00007f5dd03ea900 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=00007ffc5d326000 CR3=0000000019bd8000 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=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 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=ffff888008c58400 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=00007fd733cb7d08 CR3=000000000daac000 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=dfe988091ac9d3b9234ec7e3e4678b28 XMM02=000000000011c908eff9b2d0a8fce9cb XMM03=000000000011c9d82c67c8bc2e329bc3 XMM04=2bc5f5855a5f45ef00000000000ae988 XMM05=992852384257fd3000000000001341a8 XMM06=4fda316b135da52b0000000000133260 XMM07=e042d86d42eb936e0000000000123aa0 XMM08=d47548ae7816c58c000000000011c9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000