syzkaller login: [ 31.058229] sshd (212) used greatest stack depth: 24128 bytes left [ 31.059143] BUG: Bad rss-counter state mm:000000003d6d9c12 type:MM_FILEPAGES val:33 [ 31.060631] BUG: Bad rss-counter state mm:000000003d6d9c12 type:MM_ANONPAGES val:22 [ 31.235794] ================================================================== [ 31.236724] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237674] Read of size 8 at addr ffff888010249140 by task sshd/219 [ 31.238510] [ 31.238822] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.240702] Call Trace: [ 31.241080] [ 31.241375] dump_stack_lvl+0x91/0xf0 [ 31.241890] print_report+0xcc/0x620 [ 31.242426] ? __virt_addr_valid+0x102/0x340 [ 31.243015] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244299] kasan_report+0xbe/0xf0 [ 31.244789] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245445] vma_interval_tree_remove+0xc75/0xec0 [ 31.246085] vma_prepare+0xc54/0x11a0 [ 31.246594] __split_vma+0x5af/0x950 [ 31.247096] ? __pfx___split_vma+0x10/0x10 [ 31.247636] ? find_held_lock+0x2c/0x110 [ 31.248174] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.248741] ? lock_is_held_type+0x9f/0x120 [ 31.249315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.249937] ? mtree_range_walk+0x632/0x900 [ 31.250522] ? mas_walk+0x5c7/0x7c0 [ 31.251028] do_vmi_munmap+0x1f1/0x2b0 [ 31.251538] mmap_region+0x1f9/0x2660 [ 31.252048] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.252558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.253312] ? __pfx_lock_acquire+0x10/0x10 [ 31.253849] ? __pfx_mmap_region+0x10/0x10 [ 31.254451] ? security_mmap_addr+0x7d/0xa0 [ 31.255012] ? get_unmapped_area+0x1f5/0x3f0 [ 31.255582] do_mmap+0x854/0xf00 [ 31.256059] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.256577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.257174] ksys_mmap_pgoff+0x3af/0x500 [ 31.257703] do_syscall_64+0x3f/0x90 [ 31.258216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258920] RIP: 0033:0x7f553ddb1d82 [ 31.259422] 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 [ 31.261655] RSP: 002b:00007ffe98184928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.262925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f553ddb1d82 [ 31.263831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f553d1eb000 [ 31.264736] RBP: 00007f553d1eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.265634] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7d4c32ec0 [ 31.266550] R13: 00007ffe98184940 R14: 00007ffe98184970 R15: 00007ffe98184cd0 [ 31.267477] [ 31.267798] [ 31.268040] Allocated by task 212: [ 31.268487] kasan_save_stack+0x22/0x50 [ 31.269030] kasan_set_track+0x25/0x30 [ 31.269554] __kasan_slab_alloc+0x59/0x70 [ 31.270111] kmem_cache_alloc+0x16b/0x370 [ 31.270661] vm_area_dup+0x20/0x160 [ 31.271162] __split_vma+0x170/0x950 [ 31.271643] split_vma+0xc6/0x110 [ 31.272117] mprotect_fixup+0x8d2/0xb30 [ 31.272635] do_mprotect_pkey+0x87e/0xd40 [ 31.273192] __x64_sys_mprotect+0x78/0xc0 [ 31.273735] do_syscall_64+0x3f/0x90 [ 31.274236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274931] [ 31.275166] Freed by task 9: [ 31.275554] kasan_save_stack+0x22/0x50 [ 31.276098] kasan_set_track+0x25/0x30 [ 31.276618] kasan_save_free_info+0x2b/0x50 [ 31.277179] __kasan_slab_free+0x10a/0x190 [ 31.277730] kmem_cache_free+0x10d/0x4d0 [ 31.278273] rcu_core+0x8c8/0x2860 [ 31.278760] __do_softirq+0x1b7/0x7d4 [ 31.279284] [ 31.279509] Last potentially related work creation: [ 31.280134] kasan_save_stack+0x22/0x50 [ 31.280791] __kasan_record_aux_stack+0x8e/0xa0 [ 31.281607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.282520] remove_vma+0x139/0x170 [ 31.283168] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.283957] do_vmi_munmap+0x1f1/0x2b0 [ 31.284643] __vm_munmap+0x138/0x3a0 [ 31.285284] __x64_sys_munmap+0x59/0x80 [ 31.285883] do_syscall_64+0x3f/0x90 [ 31.286418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287142] [ 31.287368] The buggy address belongs to the object at ffff8880102490e8 [ 31.287368] which belongs to the cache vm_area_struct of size 168 [ 31.288917] The buggy address is located 88 bytes inside of [ 31.288917] freed 168-byte region [ffff8880102490e8, ffff888010249190) [ 31.290431] [ 31.290659] The buggy address belongs to the physical page: [ 31.291376] page:00000000f3a0f7fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10249 [ 31.292537] memcg:ffff88801024a001 [ 31.292995] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.293675] page_type: 0xffffffff() [ 31.294165] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.295175] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801024a001 [ 31.296146] page dumped because: kasan: bad access detected [ 31.296834] [ 31.297072] Memory state around the buggy address: [ 31.297680] ffff888010249000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.298607] ffff888010249080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.299528] >ffff888010249100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.300421] ^ [ 31.301094] ffff888010249180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.302002] ffff888010249200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.302910] ================================================================== [ 31.304045] Disabling lock debugging due to kernel taint [ 33.917784] BUG: Bad rss-counter state mm:0000000095f81a23 type:MM_FILEPAGES val:33 [ 33.918719] BUG: Bad rss-counter state mm:0000000095f81a23 type:MM_ANONPAGES val:22 [ 34.423494] BUG: Bad rss-counter state mm:00000000967739ee type:MM_FILEPAGES val:33 [ 34.424518] BUG: Bad rss-counter state mm:00000000967739ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47077' (ECDSA) to the list of known hosts. 2023/06/20 14:02:08 fuzzer started 2023/06/20 14:02:08 dialing manager at localhost:36067 2023/06/20 14:02:08 checking machine... 2023/06/20 14:02:08 checking revisions... [ 35.078721] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:02:08 testing simple program... [ 35.141475] cgroup: Unknown subsys name 'net' [ 35.178645] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:08 Registers: info registers vcpu 0 RAX=ffff8880145142b8 RBX=1ffff11002b08fca RCX=0000000000000000 RDX=ffff88800ce81b40 RSI=ffffffff844b7d90 RDI=ffffffff85d3d350 RBP=ffff8880159f65c0 RSP=ffff888015847e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000100 R13=dffffc0000000000 R14=0000000000000001 R15=ffff8880159f65c0 RIP=ffffffff817332c1 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7f9af2c900 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=00007f7f9a357640 CR3=000000000d646000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3aca44dd58e2ded800000000000ae988 XMM05=eef50b56b88e9cbc0000000000132da0 XMM06=dfcdbad4f1609c370000000000131ee8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138f52 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff86138f56 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020db7 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37ce8 R15=ffff888008e37978 RIP=ffffffff81130bb0 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 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=00007ffc395ee000 CR3=0000000015b58000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000