syzkaller login: [ 59.084959] BUG: Bad rss-counter state mm:0000000045082eb0 type:MM_FILEPAGES val:33 [ 59.085512] BUG: Bad rss-counter state mm:0000000045082eb0 type:MM_ANONPAGES val:22 [ 59.191400] ================================================================== [ 59.192135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.192863] Read of size 8 at addr ffff888019b03310 by task sshd/220 [ 59.193446] [ 59.193613] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 59.194276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.195022] Call Trace: [ 59.195372] [ 59.195588] dump_stack_lvl+0x91/0xf0 [ 59.195967] print_report+0xcc/0x620 [ 59.196339] ? __virt_addr_valid+0x102/0x340 [ 59.196764] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.197234] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.197731] kasan_report+0xbe/0xf0 [ 59.198096] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.198510] vma_interval_tree_remove+0xc75/0xec0 [ 59.198842] vma_prepare+0xc54/0x11a0 [ 59.199109] __split_vma+0x5af/0x950 [ 59.199368] ? __pfx___split_vma+0x10/0x10 [ 59.199658] ? find_held_lock+0x2c/0x110 [ 59.199949] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.200261] ? lock_is_held_type+0x9f/0x120 [ 59.200585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.200936] ? mtree_range_walk+0x632/0x900 [ 59.201258] ? mas_walk+0x5c7/0x7c0 [ 59.201542] do_vmi_munmap+0x1f1/0x2b0 [ 59.201835] mmap_region+0x1f9/0x2660 [ 59.202117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.202416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.202839] ? __pfx_lock_acquire+0x10/0x10 [ 59.203151] ? __pfx_mmap_region+0x10/0x10 [ 59.203464] ? security_mmap_addr+0x7d/0xa0 [ 59.203782] ? get_unmapped_area+0x1f5/0x3f0 [ 59.204108] do_mmap+0x854/0xf00 [ 59.204363] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.204653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.204983] ksys_mmap_pgoff+0x3af/0x500 [ 59.205282] do_syscall_64+0x3f/0x90 [ 59.205562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.205935] RIP: 0033:0x7f76e1450d82 [ 59.206204] 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 [ 59.207472] RSP: 002b:00007fffcf882ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.208011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76e1450d82 [ 59.208513] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76e088a000 [ 59.209016] RBP: 00007f76e088a000 R08: 0000000000000009 R09: 0000000000001000 [ 59.209514] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ef94fdec0 [ 59.210017] R13: 00007fffcf882d00 R14: 00007fffcf882d30 R15: 00007fffcf883090 [ 59.210529] [ 59.210698] [ 59.210826] Allocated by task 213: [ 59.211074] kasan_save_stack+0x22/0x50 [ 59.211374] kasan_set_track+0x25/0x30 [ 59.211663] __kasan_slab_alloc+0x59/0x70 [ 59.211968] kmem_cache_alloc+0x16b/0x370 [ 59.212271] vm_area_dup+0x20/0x160 [ 59.212535] __split_vma+0x170/0x950 [ 59.212814] split_vma+0xc6/0x110 [ 59.213067] mprotect_fixup+0x8d2/0xb30 [ 59.213365] do_mprotect_pkey+0x87e/0xd40 [ 59.213674] __x64_sys_mprotect+0x78/0xc0 [ 59.213979] do_syscall_64+0x3f/0x90 [ 59.214252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.214624] [ 59.214749] Freed by task 0: [ 59.214963] kasan_save_stack+0x22/0x50 [ 59.215261] kasan_set_track+0x25/0x30 [ 59.215553] kasan_save_free_info+0x2b/0x50 [ 59.215867] __kasan_slab_free+0x10a/0x190 [ 59.216191] kmem_cache_free+0x10d/0x4d0 [ 59.216477] rcu_core+0x8c8/0x2860 [ 59.216743] __do_softirq+0x1b7/0x7d4 [ 59.217023] [ 59.217148] Last potentially related work creation: [ 59.217503] kasan_save_stack+0x22/0x50 [ 59.217794] __kasan_record_aux_stack+0x8e/0xa0 [ 59.218131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.218502] remove_vma+0x139/0x170 [ 59.218764] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.219082] do_vmi_munmap+0x1f1/0x2b0 [ 59.219360] __vm_munmap+0x138/0x3a0 [ 59.219639] __x64_sys_munmap+0x59/0x80 [ 59.219922] do_syscall_64+0x3f/0x90 [ 59.220201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.220585] [ 59.220710] The buggy address belongs to the object at ffff888019b032b8 [ 59.220710] which belongs to the cache vm_area_struct of size 168 [ 59.221588] The buggy address is located 88 bytes inside of [ 59.221588] freed 168-byte region [ffff888019b032b8, ffff888019b03360) [ 59.222421] [ 59.222543] The buggy address belongs to the physical page: [ 59.222932] page:000000003594f798 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b03 [ 59.223585] memcg:ffff88800ceac101 [ 59.223837] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.224216] page_type: 0xffffffff() [ 59.224485] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.225013] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ceac101 [ 59.225557] page dumped because: kasan: bad access detected [ 59.225945] [ 59.226073] Memory state around the buggy address: [ 59.226411] ffff888019b03200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 59.226911] ffff888019b03280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 59.227410] >ffff888019b03300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 59.227910] ^ [ 59.228201] ffff888019b03380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 59.228707] ffff888019b03400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 59.229200] ================================================================== [ 59.229856] Disabling lock debugging due to kernel taint [ 61.403736] BUG: Bad rss-counter state mm:000000003522bc93 type:MM_FILEPAGES val:33 [ 61.404541] BUG: Bad rss-counter state mm:000000003522bc93 type:MM_ANONPAGES val:22 [ 61.877647] BUG: Bad rss-counter state mm:00000000702d0878 type:MM_FILEPAGES val:33 [ 61.879430] BUG: Bad rss-counter state mm:00000000702d0878 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49490' (ECDSA) to the list of known hosts. 2023/06/19 17:06:48 fuzzer started 2023/06/19 17:06:48 dialing manager at localhost:44161 2023/06/19 17:06:48 checking machine... 2023/06/19 17:06:48 checking revisions... [ 62.594006] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:06:48 testing simple program... [ 62.637058] cgroup: Unknown subsys name 'net' [ 62.681355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:06:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888019a8aec0 RCX=ffffffff81370c98 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff8880194179f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81371098 RFL=00000083 [--S---C] 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 00007fb4c594d900 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=00007ffccfc6d000 CR3=000000000d98e000 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=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=00007f825eed8f50 CR3=000000000c794000 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=f63051e12c083f82e94f111ff184b6f5 XMM02=000000000011d488eff9b2d0a8fce9cb XMM03=000000000011d5582c67c8bc2e329bc3 XMM04=e067669939933eca00000000000ae988 XMM05=f960bd142e1545900000000000135990 XMM06=00c3ffa147b8d8570000000000134a30 XMM07=e042d86d42eb936e0000000000125528 XMM08=a2279a2cc7ba266d000000000011d558 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000