syzkaller login: [ 31.094909] BUG: Bad rss-counter state mm:0000000048319c08 type:MM_FILEPAGES val:33 [ 31.096169] BUG: Bad rss-counter state mm:0000000048319c08 type:MM_ANONPAGES val:22 [ 31.245991] ================================================================== [ 31.246959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.247917] Read of size 8 at addr ffff88800f09bed8 by task sshd/219 [ 31.248731] [ 31.248960] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.249948] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.251006] Call Trace: [ 31.251338] [ 31.251626] dump_stack_lvl+0x91/0xf0 [ 31.252159] print_report+0xcc/0x620 [ 31.252671] ? __virt_addr_valid+0x102/0x340 [ 31.253229] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254497] kasan_report+0xbe/0xf0 [ 31.255001] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255682] vma_interval_tree_remove+0xc75/0xec0 [ 31.256341] vma_prepare+0xc54/0x11a0 [ 31.256858] __split_vma+0x5af/0x950 [ 31.257364] ? __pfx___split_vma+0x10/0x10 [ 31.257937] ? find_held_lock+0x2c/0x110 [ 31.258512] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.259124] ? lock_is_held_type+0x9f/0x120 [ 31.259700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.260350] ? mtree_range_walk+0x632/0x900 [ 31.260944] ? mas_walk+0x5c7/0x7c0 [ 31.261455] do_vmi_munmap+0x1f1/0x2b0 [ 31.261983] mmap_region+0x1f9/0x2660 [ 31.262526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.263083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.263851] ? __pfx_lock_acquire+0x10/0x10 [ 31.264422] ? __pfx_mmap_region+0x10/0x10 [ 31.264988] ? security_mmap_addr+0x7d/0xa0 [ 31.265556] ? get_unmapped_area+0x1f5/0x3f0 [ 31.266156] do_mmap+0x854/0xf00 [ 31.266624] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.267150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.267755] ksys_mmap_pgoff+0x3af/0x500 [ 31.268296] do_syscall_64+0x3f/0x90 [ 31.268806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269499] RIP: 0033:0x7f99aa80cd82 [ 31.269988] 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 [ 31.272300] RSP: 002b:00007ffcc26f7688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.273282] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99aa80cd82 [ 31.274209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99a9c46000 [ 31.275139] RBP: 00007f99a9c46000 R08: 0000000000000009 R09: 0000000000001000 [ 31.276049] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559fad720ec0 [ 31.276962] R13: 00007ffcc26f76a0 R14: 00007ffcc26f76d0 R15: 00007ffcc26f7a30 [ 31.277889] [ 31.278210] [ 31.278437] Allocated by task 212: [ 31.278893] kasan_save_stack+0x22/0x50 [ 31.279427] kasan_set_track+0x25/0x30 [ 31.279955] __kasan_slab_alloc+0x59/0x70 [ 31.280522] kmem_cache_alloc+0x16b/0x370 [ 31.281080] vm_area_dup+0x20/0x160 [ 31.281563] __split_vma+0x170/0x950 [ 31.282059] split_vma+0xc6/0x110 [ 31.282544] mprotect_fixup+0x8d2/0xb30 [ 31.283080] do_mprotect_pkey+0x87e/0xd40 [ 31.283637] __x64_sys_mprotect+0x78/0xc0 [ 31.284196] do_syscall_64+0x3f/0x90 [ 31.284703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285396] [ 31.285628] Freed by task 13: [ 31.286042] kasan_save_stack+0x22/0x50 [ 31.286587] kasan_set_track+0x25/0x30 [ 31.287116] kasan_save_free_info+0x2b/0x50 [ 31.287683] __kasan_slab_free+0x10a/0x190 [ 31.288254] kmem_cache_free+0x10d/0x4d0 [ 31.288800] rcu_core+0x8c8/0x2860 [ 31.289276] __do_softirq+0x1b7/0x7d4 [ 31.289785] [ 31.290043] Last potentially related work creation: [ 31.290693] kasan_save_stack+0x22/0x50 [ 31.291231] __kasan_record_aux_stack+0x8e/0xa0 [ 31.291843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.292531] remove_vma+0x139/0x170 [ 31.293012] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.293605] do_vmi_munmap+0x1f1/0x2b0 [ 31.294138] __vm_munmap+0x138/0x3a0 [ 31.294657] __x64_sys_munmap+0x59/0x80 [ 31.295192] do_syscall_64+0x3f/0x90 [ 31.295708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296391] [ 31.296618] The buggy address belongs to the object at ffff88800f09be80 [ 31.296618] which belongs to the cache vm_area_struct of size 168 [ 31.298233] The buggy address is located 88 bytes inside of [ 31.298233] freed 168-byte region [ffff88800f09be80, ffff88800f09bf28) [ 31.299760] [ 31.299989] The buggy address belongs to the physical page: [ 31.300697] page:00000000e2dc6581 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf09b [ 31.301865] memcg:ffff888015e88d01 [ 31.302345] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.303043] page_type: 0xffffffff() [ 31.303531] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.304529] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e88d01 [ 31.305514] page dumped because: kasan: bad access detected [ 31.306251] [ 31.306480] Memory state around the buggy address: [ 31.307103] ffff88800f09bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.308025] ffff88800f09be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.308951] >ffff88800f09be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.309872] ^ [ 31.310675] ffff88800f09bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.311600] ffff88800f09bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.312516] ================================================================== [ 31.313499] Disabling lock debugging due to kernel taint [ 33.300726] BUG: Bad rss-counter state mm:00000000cfe31fc4 type:MM_FILEPAGES val:33 [ 33.301754] BUG: Bad rss-counter state mm:00000000cfe31fc4 type:MM_ANONPAGES val:22 [ 33.825075] BUG: Bad rss-counter state mm:0000000069ee45f6 type:MM_FILEPAGES val:33 [ 33.826244] BUG: Bad rss-counter state mm:0000000069ee45f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36815' (ECDSA) to the list of known hosts. 2023/06/21 01:18:35 fuzzer started 2023/06/21 01:18:35 dialing manager at localhost:36067 2023/06/21 01:18:35 checking machine... 2023/06/21 01:18:35 checking revisions... [ 34.466313] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:18:35 testing simple program... [ 34.507753] cgroup: Unknown subsys name 'net' [ 34.554187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:35 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=00007f46d7674510 CR3=000000000c8cc000 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=001cf547821c9fbe004c5fdc612ed02a XMM02=000000000011b1a0ec2efd57dc4c00df XMM03=00000000001227389a1870cf7b478edd XMM04=67c201631d2997fb00000000000ae988 XMM05=dfcdbad4f1609c370000000000132510 XMM06=56c5a3a167f64d470000000000131378 XMM07=e042d86d42eb936e00000000001229b8 XMM08=9a1870cf7b478edd000000000011b200 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801901b480 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800d968b00 RBP=ffff88800d968b00 RSP=ffff88806cf09df0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087c9280 R13=ffffea0000640600 R14=ffffffff818d9c06 R15=ffff88800d968b00 RIP=ffffffff8135bd4f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f35a007a900 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=00007ffd30c32000 CR3=000000000e4d2000 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