syzkaller login: [ 30.099756] sshd (212) used greatest stack depth: 24128 bytes left [ 30.101988] BUG: Bad rss-counter state mm:000000000a1e570f type:MM_FILEPAGES val:33 [ 30.103194] BUG: Bad rss-counter state mm:000000000a1e570f type:MM_ANONPAGES val:22 [ 30.258729] ================================================================== [ 30.259841] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.260989] Read of size 8 at addr ffff88801a9e3a50 by task sshd/219 [ 30.262098] [ 30.262372] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.263431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.264643] Call Trace: [ 30.265045] [ 30.265393] dump_stack_lvl+0x91/0xf0 [ 30.266026] print_report+0xcc/0x620 [ 30.266632] ? __virt_addr_valid+0x102/0x340 [ 30.267215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.267827] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.268447] kasan_report+0xbe/0xf0 [ 30.268922] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.269539] vma_interval_tree_remove+0xc75/0xec0 [ 30.270157] vma_prepare+0xc54/0x11a0 [ 30.270688] __split_vma+0x5af/0x950 [ 30.271319] ? __pfx___split_vma+0x10/0x10 [ 30.271903] ? find_held_lock+0x2c/0x110 [ 30.272419] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.272985] ? lock_is_held_type+0x9f/0x120 [ 30.273525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.274155] ? mtree_range_walk+0x632/0x900 [ 30.274705] ? mas_walk+0x5c7/0x7c0 [ 30.275181] do_vmi_munmap+0x1f1/0x2b0 [ 30.275682] mmap_region+0x1f9/0x2660 [ 30.276171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.276784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.277541] ? __pfx_lock_acquire+0x10/0x10 [ 30.278098] ? __pfx_mmap_region+0x10/0x10 [ 30.278624] ? security_mmap_addr+0x7d/0xa0 [ 30.279161] ? get_unmapped_area+0x1f5/0x3f0 [ 30.279710] do_mmap+0x854/0xf00 [ 30.280155] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.280650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.281217] ksys_mmap_pgoff+0x3af/0x500 [ 30.281720] do_syscall_64+0x3f/0x90 [ 30.282211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.282854] RIP: 0033:0x7fbeeff72d82 [ 30.283305] 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 [ 30.285438] RSP: 002b:00007ffec8ff3058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.286378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbeeff72d82 [ 30.287231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbeef3ac000 [ 30.288205] RBP: 00007fbeef3ac000 R08: 0000000000000009 R09: 0000000000001000 [ 30.289199] R10: 0000000000000812 R11: 0000000000000206 R12: 000055afdf70fec0 [ 30.290054] R13: 00007ffec8ff3070 R14: 00007ffec8ff30a0 R15: 00007ffec8ff3400 [ 30.290923] [ 30.291224] [ 30.291443] Allocated by task 212: [ 30.291880] kasan_save_stack+0x22/0x50 [ 30.292398] kasan_set_track+0x25/0x30 [ 30.292896] __kasan_slab_alloc+0x59/0x70 [ 30.293426] kmem_cache_alloc+0x16b/0x370 [ 30.293958] vm_area_dup+0x20/0x160 [ 30.294413] __split_vma+0x170/0x950 [ 30.294880] split_vma+0xc6/0x110 [ 30.295319] mprotect_fixup+0x8d2/0xb30 [ 30.295818] do_mprotect_pkey+0x87e/0xd40 [ 30.296342] __x64_sys_mprotect+0x78/0xc0 [ 30.296858] do_syscall_64+0x3f/0x90 [ 30.297341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298003] [ 30.298219] Freed by task 212: [ 30.298606] kasan_save_stack+0x22/0x50 [ 30.299141] kasan_set_track+0x25/0x30 [ 30.299792] kasan_save_free_info+0x2b/0x50 [ 30.300395] __kasan_slab_free+0x10a/0x190 [ 30.300927] kmem_cache_free+0x10d/0x4d0 [ 30.301470] rcu_core+0x8c8/0x2860 [ 30.301912] __do_softirq+0x1b7/0x7d4 [ 30.302482] [ 30.302698] Last potentially related work creation: [ 30.303319] kasan_save_stack+0x22/0x50 [ 30.303818] __kasan_record_aux_stack+0x8e/0xa0 [ 30.304388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.305076] remove_vma+0x139/0x170 [ 30.305529] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.306111] do_vmi_munmap+0x1f1/0x2b0 [ 30.306624] __vm_munmap+0x138/0x3a0 [ 30.307094] __x64_sys_munmap+0x59/0x80 [ 30.307589] do_syscall_64+0x3f/0x90 [ 30.308105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.308743] [ 30.308965] The buggy address belongs to the object at ffff88801a9e39f8 [ 30.308965] which belongs to the cache vm_area_struct of size 168 [ 30.310470] The buggy address is located 88 bytes inside of [ 30.310470] freed 168-byte region [ffff88801a9e39f8, ffff88801a9e3aa0) [ 30.311901] [ 30.312119] The buggy address belongs to the physical page: [ 30.312772] page:00000000e91eb162 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a9e3 [ 30.313890] memcg:ffff88801aa3b601 [ 30.314332] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.314993] page_type: 0xffffffff() [ 30.315467] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.316376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aa3b601 [ 30.317333] page dumped because: kasan: bad access detected [ 30.318041] [ 30.318258] Memory state around the buggy address: [ 30.318833] ffff88801a9e3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.319734] ffff88801a9e3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.320578] >ffff88801a9e3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.321458] ^ [ 30.322179] ffff88801a9e3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.323072] ffff88801a9e3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.323959] ================================================================== [ 30.324877] Disabling lock debugging due to kernel taint [ 32.323801] BUG: Bad rss-counter state mm:000000006eba828c type:MM_FILEPAGES val:33 [ 32.325417] BUG: Bad rss-counter state mm:000000006eba828c type:MM_ANONPAGES val:22 [ 32.821017] BUG: Bad rss-counter state mm:000000007eda5ee2 type:MM_FILEPAGES val:33 [ 32.822234] BUG: Bad rss-counter state mm:000000007eda5ee2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38328' (ECDSA) to the list of known hosts. 2023/06/21 01:34:53 fuzzer started 2023/06/21 01:34:54 dialing manager at localhost:36067 2023/06/21 01:34:54 checking machine... 2023/06/21 01:34:54 checking revisions... [ 33.534901] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:34:54 testing simple program... [ 33.578130] cgroup: Unknown subsys name 'net' [ 33.639785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:34:53 Registers: info registers vcpu 0 RAX=fffffffffe4e5cef RBX=ffffffff86051f28 RCX=ffffffff84537da6 RDX=0000000000000000 RSI=ffffffff864b6d1e RDI=ffffffff86051f28 RBP=ffffffff86051f28 RSP=ffff88806ce099e0 R8 =ffffffff864b6d1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffffffff86051f28 R13=ffffffff86051f28 R14=ffffffff86051f28 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f53a6e19900 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=00007f53a6260c60 CR3=000000000e7f4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7c82d632323b595300000000000ae988 XMM05=6d59c12ac87966f400000000001334a8 XMM06=806171799158d9670000000000132298 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110011c6f80 RSP=ffff888008e37be0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88806cf361a0 R13=ffffffff81830805 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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=00007ffc3e3f5000 CR3=0000000016b44000 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=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