syzkaller login: [ 42.198495] BUG: Bad rss-counter state mm:00000000d08c9d4a type:MM_FILEPAGES val:33 [ 42.199733] BUG: Bad rss-counter state mm:00000000d08c9d4a type:MM_ANONPAGES val:22 [ 42.240348] ================================================================== [ 42.241479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.242602] Read of size 8 at addr ffff88800de923f8 by task sshd/219 [ 42.243752] [ 42.244041] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.245334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.246683] Call Trace: [ 42.247068] [ 42.247474] dump_stack_lvl+0x91/0xf0 [ 42.248181] print_report+0xcc/0x620 [ 42.248903] ? __virt_addr_valid+0x102/0x340 [ 42.249590] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.250345] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.251101] kasan_report+0xbe/0xf0 [ 42.251674] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.252418] vma_interval_tree_remove+0xc75/0xec0 [ 42.253174] vma_prepare+0xc54/0x11a0 [ 42.253756] __split_vma+0x5af/0x950 [ 42.254329] ? __pfx___split_vma+0x10/0x10 [ 42.254971] ? find_held_lock+0x2c/0x110 [ 42.255595] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.256286] ? lock_is_held_type+0x9f/0x120 [ 42.256941] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.257677] ? mtree_range_walk+0x632/0x900 [ 42.258280] ? mas_walk+0x5c7/0x7c0 [ 42.258755] do_vmi_munmap+0x1f1/0x2b0 [ 42.259239] mmap_region+0x1f9/0x2660 [ 42.259707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.260198] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.260898] ? __pfx_lock_acquire+0x10/0x10 [ 42.261408] ? __pfx_mmap_region+0x10/0x10 [ 42.261908] ? security_mmap_addr+0x7d/0xa0 [ 42.262420] ? get_unmapped_area+0x1f5/0x3f0 [ 42.262940] do_mmap+0x854/0xf00 [ 42.263351] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.263821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.264360] ksys_mmap_pgoff+0x3af/0x500 [ 42.264843] do_syscall_64+0x3f/0x90 [ 42.265315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.265924] RIP: 0033:0x7f7718e8cd82 [ 42.266356] 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 [ 42.268436] RSP: 002b:00007fff5e66ba98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.269364] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7718e8cd82 [ 42.270217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77182c6000 [ 42.271066] RBP: 00007f77182c6000 R08: 0000000000000009 R09: 0000000000001000 [ 42.271918] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626ffdefec0 [ 42.272768] R13: 00007fff5e66bab0 R14: 00007fff5e66bae0 R15: 00007fff5e66be40 [ 42.273627] [ 42.273920] [ 42.274135] Allocated by task 212: [ 42.274569] kasan_save_stack+0x22/0x50 [ 42.275062] kasan_set_track+0x25/0x30 [ 42.275545] __kasan_slab_alloc+0x59/0x70 [ 42.276070] kmem_cache_alloc+0x16b/0x370 [ 42.276593] vm_area_dup+0x20/0x160 [ 42.277070] __split_vma+0x170/0x950 [ 42.277534] split_vma+0xc6/0x110 [ 42.277967] mprotect_fixup+0x8d2/0xb30 [ 42.278476] do_mprotect_pkey+0x87e/0xd40 [ 42.278997] __x64_sys_mprotect+0x78/0xc0 [ 42.279516] do_syscall_64+0x3f/0x90 [ 42.279987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.280620] [ 42.280835] Freed by task 212: [ 42.281246] kasan_save_stack+0x22/0x50 [ 42.281741] kasan_set_track+0x25/0x30 [ 42.282230] kasan_save_free_info+0x2b/0x50 [ 42.282773] __kasan_slab_free+0x10a/0x190 [ 42.283307] kmem_cache_free+0x10d/0x4d0 [ 42.283822] rcu_core+0x8c8/0x2860 [ 42.284268] __do_softirq+0x1b7/0x7d4 [ 42.284748] [ 42.285033] Last potentially related work creation: [ 42.285626] kasan_save_stack+0x22/0x50 [ 42.286123] __kasan_record_aux_stack+0x8e/0xa0 [ 42.286695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.287340] remove_vma+0x139/0x170 [ 42.287792] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.288354] do_vmi_munmap+0x1f1/0x2b0 [ 42.288843] __vm_munmap+0x138/0x3a0 [ 42.289327] __x64_sys_munmap+0x59/0x80 [ 42.289823] do_syscall_64+0x3f/0x90 [ 42.290301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.290937] [ 42.291149] Second to last potentially related work creation: [ 42.291824] kasan_save_stack+0x22/0x50 [ 42.292330] __kasan_record_aux_stack+0x8e/0xa0 [ 42.292912] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.293559] remove_vma+0x139/0x170 [ 42.294015] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.294571] do_vmi_munmap+0x1f1/0x2b0 [ 42.295062] mmap_region+0x1f9/0x2660 [ 42.295541] do_mmap+0x854/0xf00 [ 42.295977] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.296470] ksys_mmap_pgoff+0x3af/0x500 [ 42.296979] do_syscall_64+0x3f/0x90 [ 42.297445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.298089] [ 42.298309] The buggy address belongs to the object at ffff88800de923a0 [ 42.298309] which belongs to the cache vm_area_struct of size 168 [ 42.299797] The buggy address is located 88 bytes inside of [ 42.299797] freed 168-byte region [ffff88800de923a0, ffff88800de92448) [ 42.301229] [ 42.301444] The buggy address belongs to the physical page: [ 42.302097] page:0000000019077597 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde92 [ 42.303178] memcg:ffff88800e2d5301 [ 42.303598] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.304243] page_type: 0xffffffff() [ 42.304700] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 42.305645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2d5301 [ 42.306558] page dumped because: kasan: bad access detected [ 42.307216] [ 42.307431] Memory state around the buggy address: [ 42.308010] ffff88800de92280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.308867] ffff88800de92300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.309753] >ffff88800de92380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.310610] ^ [ 42.311451] ffff88800de92400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.312317] ffff88800de92480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.313182] ================================================================== [ 42.314194] Disabling lock debugging due to kernel taint [ 44.303662] BUG: Bad rss-counter state mm:000000004c8f8ffa type:MM_FILEPAGES val:33 [ 44.304683] BUG: Bad rss-counter state mm:000000004c8f8ffa type:MM_ANONPAGES val:22 [ 44.891423] BUG: Bad rss-counter state mm:000000003d138b9d type:MM_FILEPAGES val:33 [ 44.892626] BUG: Bad rss-counter state mm:000000003d138b9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31007' (ECDSA) to the list of known hosts. 2023/06/20 02:17:29 fuzzer started 2023/06/20 02:17:29 dialing manager at localhost:44161 2023/06/20 02:17:29 checking machine... 2023/06/20 02:17:29 checking revisions... [ 45.565656] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:17:29 testing simple program... [ 45.617897] cgroup: Unknown subsys name 'net' [ 45.691332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:17:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856d8220 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888018dafbd8 RBP=1ffff110031b5f77 RSP=ffff888018dafbb0 R8 =0000000000000001 R9 =ffffed10031b5f7b R10=0000000000000003 R11=00000000000b6996 R12=ffffffff856d8228 R13=ffffffff856d8230 R14=ffff888018f66638 R15=ffff888018f665f0 RIP=ffffffff812e00f6 RFL=00000046 [---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 00007f8b4b129900 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=00007f8b4b6e0618 CR3=000000000d7c8000 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=00000000056f016e RBX=ffff888018f6dc60 RCX=ffff88806c4eff90 RDX=0000000000000000 RSI=ffffffff84601286 RDI=0000000000000000 RBP=ffff888015c4f870 RSP=ffff888015c4f7e8 R8 =000000009380aa90 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffffffff81845c80 R13=ffffea00006f5bc0 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff81370a3b 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 00007ff7d9f09900 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=00007ff7d936b9e0 CR3=0000000008db0000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a8ce244cda4639e800000000000ae988 XMM05=b0ff886c46da7a8200000000001361a8 XMM06=806171799158d9670000000000134f98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000