syzkaller login: [ 31.737721] BUG: Bad rss-counter state mm:00000000b4ef6a6c type:MM_FILEPAGES val:33 [ 31.738967] BUG: Bad rss-counter state mm:00000000b4ef6a6c type:MM_ANONPAGES val:22 [ 31.885538] ================================================================== [ 31.886466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.887396] Read of size 8 at addr ffff88800ee91228 by task sshd/220 [ 31.888157] [ 31.888380] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.889442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.890423] Call Trace: [ 31.890744] [ 31.891035] dump_stack_lvl+0x91/0xf0 [ 31.891535] print_report+0xcc/0x620 [ 31.892018] ? __virt_addr_valid+0x102/0x340 [ 31.892576] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.893226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.893852] kasan_report+0xbe/0xf0 [ 31.894327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.894940] vma_interval_tree_remove+0xc75/0xec0 [ 31.895539] vma_prepare+0xc54/0x11a0 [ 31.896013] __split_vma+0x5af/0x950 [ 31.896491] ? __pfx___split_vma+0x10/0x10 [ 31.897028] ? find_held_lock+0x2c/0x110 [ 31.897545] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.898105] ? lock_is_held_type+0x9f/0x120 [ 31.898641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.899250] ? mtree_range_walk+0x632/0x900 [ 31.899800] ? mas_walk+0x5c7/0x7c0 [ 31.900282] do_vmi_munmap+0x1f1/0x2b0 [ 31.900787] mmap_region+0x1f9/0x2660 [ 31.901272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.901786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.902500] ? __pfx_lock_acquire+0x10/0x10 [ 31.903035] ? __pfx_mmap_region+0x10/0x10 [ 31.903559] ? security_mmap_addr+0x7d/0xa0 [ 31.904094] ? get_unmapped_area+0x1f5/0x3f0 [ 31.904652] do_mmap+0x854/0xf00 [ 31.905097] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.905592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.906151] ksys_mmap_pgoff+0x3af/0x500 [ 31.906658] do_syscall_64+0x3f/0x90 [ 31.907129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.907769] RIP: 0033:0x7fbd5c231d82 [ 31.908226] 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 [ 31.910377] RSP: 002b:00007fff26884c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.911281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd5c231d82 [ 31.912129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd5b66b000 [ 31.912975] RBP: 00007fbd5b66b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.913810] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606ee5a2f70 [ 31.914651] R13: 00007fff26884c20 R14: 00007fff26884c50 R15: 00007fff26884fb0 [ 31.915507] [ 31.915797] [ 31.916012] Allocated by task 213: [ 31.916445] kasan_save_stack+0x22/0x50 [ 31.916974] kasan_set_track+0x25/0x30 [ 31.917471] __kasan_slab_alloc+0x59/0x70 [ 31.917999] kmem_cache_alloc+0x16b/0x370 [ 31.918519] vm_area_dup+0x20/0x160 [ 31.918973] __split_vma+0x170/0x950 [ 31.919439] split_vma+0xc6/0x110 [ 31.919884] mprotect_fixup+0x8d2/0xb30 [ 31.920389] do_mprotect_pkey+0x87e/0xd40 [ 31.920924] __x64_sys_mprotect+0x78/0xc0 [ 31.921444] do_syscall_64+0x3f/0x90 [ 31.921916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.922554] [ 31.922774] Freed by task 213: [ 31.923162] kasan_save_stack+0x22/0x50 [ 31.923658] kasan_set_track+0x25/0x30 [ 31.924148] kasan_save_free_info+0x2b/0x50 [ 31.924693] __kasan_slab_free+0x10a/0x190 [ 31.925223] kmem_cache_free+0x10d/0x4d0 [ 31.925728] rcu_core+0x8c8/0x2860 [ 31.926171] __do_softirq+0x1b7/0x7d4 [ 31.926647] [ 31.926860] Last potentially related work creation: [ 31.927451] kasan_save_stack+0x22/0x50 [ 31.927958] __kasan_record_aux_stack+0x8e/0xa0 [ 31.928529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.929182] remove_vma+0x139/0x170 [ 31.929717] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.930283] do_vmi_munmap+0x1f1/0x2b0 [ 31.930772] __vm_munmap+0x138/0x3a0 [ 31.931249] __x64_sys_munmap+0x59/0x80 [ 31.931756] do_syscall_64+0x3f/0x90 [ 31.932234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.932903] [ 31.933117] Second to last potentially related work creation: [ 31.933848] kasan_save_stack+0x22/0x50 [ 31.934353] __kasan_record_aux_stack+0x8e/0xa0 [ 31.934919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.935551] remove_vma+0x139/0x170 [ 31.935999] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.936554] do_vmi_munmap+0x1f1/0x2b0 [ 31.937051] mmap_region+0x1f9/0x2660 [ 31.937520] do_mmap+0x854/0xf00 [ 31.937946] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.938433] ksys_mmap_pgoff+0x3af/0x500 [ 31.938931] do_syscall_64+0x3f/0x90 [ 31.939400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.940030] [ 31.940247] The buggy address belongs to the object at ffff88800ee911d0 [ 31.940247] which belongs to the cache vm_area_struct of size 168 [ 31.941706] The buggy address is located 88 bytes inside of [ 31.941706] freed 168-byte region [ffff88800ee911d0, ffff88800ee91278) [ 31.943103] [ 31.943320] The buggy address belongs to the physical page: [ 31.943978] page:00000000307ae672 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee91 [ 31.945066] memcg:ffff88800e639301 [ 31.945487] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.946185] page_type: 0xffffffff() [ 31.946628] raw: 0100000000000200 ffff88800879fc80 ffffea000032e700 dead000000000003 [ 31.947538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e639301 [ 31.948437] page dumped because: kasan: bad access detected [ 31.949095] [ 31.949308] Memory state around the buggy address: [ 31.949876] ffff88800ee91100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.950717] ffff88800ee91180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.951561] >ffff88800ee91200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.952407] ^ [ 31.952965] ffff88800ee91280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.953822] ffff88800ee91300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.954668] ================================================================== [ 31.955721] Disabling lock debugging due to kernel taint [ 34.301757] BUG: Bad rss-counter state mm:00000000c3012c84 type:MM_FILEPAGES val:33 [ 34.302981] BUG: Bad rss-counter state mm:00000000c3012c84 type:MM_ANONPAGES val:22 [ 34.893758] BUG: Bad rss-counter state mm:000000003511e64a type:MM_FILEPAGES val:33 [ 34.894758] BUG: Bad rss-counter state mm:000000003511e64a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54499' (ECDSA) to the list of known hosts. 2023/06/19 15:35:03 fuzzer started 2023/06/19 15:35:03 dialing manager at localhost:44161 2023/06/19 15:35:03 checking machine... 2023/06/19 15:35:03 checking revisions... [ 35.542742] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:35:03 testing simple program... [ 35.588441] cgroup: Unknown subsys name 'net' [ 35.660274] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001afefc6 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801a980c00 RBP=ffff88800d7a5900 RSP=ffff88800d7f7e18 R8 =0000000000000000 R9 =ffffed1003530180 R10=ffff88801a980c03 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000002 R15=dffffc0000000000 RIP=ffffffff814c07e0 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 00007f736ce4e900 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=00007f736d4060b0 CR3=000000000eda6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801bf18198 RBX=dffffc0000000000 RCX=ffffffff812e00e5 RDX=1ffff110037e3033 RSI=ffffffff87b86f80 RDI=ffff8880169722d8 RBP=ffff88801c9df2c8 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=ffff8880169722c8 R13=fffffbfff0f70df0 R14=ffff88801bdcf2c8 R15=ffffffff87b86f80 RIP=ffffffff844cc5c5 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 00007f736ce4e900 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=00007f736d405618 CR3=000000000eda6000 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=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