syzkaller login: [ 31.092235] BUG: Bad rss-counter state mm:0000000086b8333a type:MM_FILEPAGES val:33 [ 31.093794] BUG: Bad rss-counter state mm:0000000086b8333a type:MM_ANONPAGES val:22 [ 31.252540] ================================================================== [ 31.253532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.254552] Read of size 8 at addr ffff888018eb3d08 by task sshd/219 [ 31.255505] [ 31.255736] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.256688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.257777] Call Trace: [ 31.258134] [ 31.258449] dump_stack_lvl+0x91/0xf0 [ 31.259000] print_report+0xcc/0x620 [ 31.259532] ? __virt_addr_valid+0x102/0x340 [ 31.260143] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260832] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261512] kasan_report+0xbe/0xf0 [ 31.262040] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262726] vma_interval_tree_remove+0xc75/0xec0 [ 31.263391] vma_prepare+0xc54/0x11a0 [ 31.263922] __split_vma+0x5af/0x950 [ 31.264450] ? __pfx___split_vma+0x10/0x10 [ 31.265035] ? find_held_lock+0x2c/0x110 [ 31.265607] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.266234] ? lock_is_held_type+0x9f/0x120 [ 31.266832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.267502] ? mtree_range_walk+0x632/0x900 [ 31.268113] ? mas_walk+0x5c7/0x7c0 [ 31.268652] do_vmi_munmap+0x1f1/0x2b0 [ 31.269202] mmap_region+0x1f9/0x2660 [ 31.269734] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.270297] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.271089] ? __pfx_lock_acquire+0x10/0x10 [ 31.271684] ? __pfx_mmap_region+0x10/0x10 [ 31.272263] ? security_mmap_addr+0x7d/0xa0 [ 31.272864] ? get_unmapped_area+0x1f5/0x3f0 [ 31.273473] do_mmap+0x854/0xf00 [ 31.273959] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.274509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.275136] ksys_mmap_pgoff+0x3af/0x500 [ 31.275698] do_syscall_64+0x3f/0x90 [ 31.276233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276971] RIP: 0033:0x7fa7f347cd82 [ 31.277482] 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 [ 31.279827] RSP: 002b:00007ffd53d9fbf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.280837] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7f347cd82 [ 31.281780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7f28b6000 [ 31.282720] RBP: 00007fa7f28b6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.283659] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e216f4eb20 [ 31.284607] R13: 00007ffd53d9fc10 R14: 00007ffd53d9fc40 R15: 00007ffd53d9ffa0 [ 31.285559] [ 31.285879] [ 31.286115] Allocated by task 212: [ 31.286588] kasan_save_stack+0x22/0x50 [ 31.287154] kasan_set_track+0x25/0x30 [ 31.287704] __kasan_slab_alloc+0x59/0x70 [ 31.288308] kmem_cache_alloc+0x16b/0x370 [ 31.288891] vm_area_dup+0x20/0x160 [ 31.289401] __split_vma+0x170/0x950 [ 31.289902] split_vma+0xc6/0x110 [ 31.290376] mprotect_fixup+0x8d2/0xb30 [ 31.290917] do_mprotect_pkey+0x87e/0xd40 [ 31.291483] __x64_sys_mprotect+0x78/0xc0 [ 31.292044] do_syscall_64+0x3f/0x90 [ 31.292568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293270] [ 31.293501] Freed by task 212: [ 31.293925] kasan_save_stack+0x22/0x50 [ 31.294469] kasan_set_track+0x25/0x30 [ 31.295003] kasan_save_free_info+0x2b/0x50 [ 31.295579] __kasan_slab_free+0x10a/0x190 [ 31.296160] kmem_cache_free+0x10d/0x4d0 [ 31.296720] rcu_core+0x8c8/0x2860 [ 31.297195] __do_softirq+0x1b7/0x7d4 [ 31.297714] [ 31.297954] Last potentially related work creation: [ 31.298599] kasan_save_stack+0x22/0x50 [ 31.299163] __kasan_record_aux_stack+0x8e/0xa0 [ 31.299806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300557] remove_vma+0x139/0x170 [ 31.301055] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301674] do_vmi_munmap+0x1f1/0x2b0 [ 31.302216] __vm_munmap+0x138/0x3a0 [ 31.302731] __x64_sys_munmap+0x59/0x80 [ 31.303281] do_syscall_64+0x3f/0x90 [ 31.303807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304534] [ 31.304769] The buggy address belongs to the object at ffff888018eb3cb0 [ 31.304769] which belongs to the cache vm_area_struct of size 168 [ 31.306400] The buggy address is located 88 bytes inside of [ 31.306400] freed 168-byte region [ffff888018eb3cb0, ffff888018eb3d58) [ 31.307964] [ 31.308205] The buggy address belongs to the physical page: [ 31.308945] page:00000000a91d76e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18eb3 [ 31.310167] memcg:ffff8880090fe101 [ 31.310643] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.311368] page_type: 0xffffffff() [ 31.311867] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.312900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880090fe101 [ 31.313911] page dumped because: kasan: bad access detected [ 31.314646] [ 31.314881] Memory state around the buggy address: [ 31.315521] ffff888018eb3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.316480] ffff888018eb3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.317434] >ffff888018eb3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.318384] ^ [ 31.318867] ffff888018eb3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.319816] ffff888018eb3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.320786] ================================================================== [ 31.321922] Disabling lock debugging due to kernel taint [ 33.337232] BUG: Bad rss-counter state mm:00000000e1a0ead0 type:MM_FILEPAGES val:33 [ 33.338400] BUG: Bad rss-counter state mm:00000000e1a0ead0 type:MM_ANONPAGES val:22 [ 33.804728] BUG: Bad rss-counter state mm:00000000b7e77524 type:MM_FILEPAGES val:33 [ 33.805713] BUG: Bad rss-counter state mm:00000000b7e77524 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56022' (ECDSA) to the list of known hosts. 2023/06/20 15:10:54 fuzzer started 2023/06/20 15:10:55 dialing manager at localhost:36067 2023/06/20 15:10:55 checking machine... 2023/06/20 15:10:55 checking revisions... [ 34.486671] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:10:55 testing simple program... [ 34.537209] cgroup: Unknown subsys name 'net' [ 34.584046] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:10:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffcf4351528 CR3=000000000de66000 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=2034353a30313a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a30313a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f447bc0a000 CR3=000000000e5b6000 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=a02e69dd573cafa45649de5e05c6fbff XMM02=000000000011d550eff9b2d0a8fce9cb XMM03=000000000011d6202c67c8bc2e329bc3 XMM04=b5a98121a15b5eb600000000000ae988 XMM05=dfcdbad4f1609c370000000000131ae0 XMM06=7d8603fab5180be60000000000130948 XMM07=e042d86d42eb936e0000000000121f08 XMM08=7272cc6962c06f14000000000011d620 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000