syzkaller login: [ 30.377148] BUG: Bad rss-counter state mm:000000006afe147b type:MM_FILEPAGES val:33 [ 30.378606] BUG: Bad rss-counter state mm:000000006afe147b type:MM_ANONPAGES val:22 [ 30.543572] ================================================================== [ 30.544687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.545929] Read of size 8 at addr ffff88801598db38 by task sshd/220 [ 30.546931] [ 30.547237] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.548151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.549130] Call Trace: [ 30.549456] [ 30.549747] dump_stack_lvl+0x91/0xf0 [ 30.550236] print_report+0xcc/0x620 [ 30.550720] ? __virt_addr_valid+0x102/0x340 [ 30.551293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.551918] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552534] kasan_report+0xbe/0xf0 [ 30.553011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.553636] vma_interval_tree_remove+0xc75/0xec0 [ 30.554240] vma_prepare+0xc54/0x11a0 [ 30.554724] __split_vma+0x5af/0x950 [ 30.555206] ? __pfx___split_vma+0x10/0x10 [ 30.555741] ? find_held_lock+0x2c/0x110 [ 30.556269] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.556845] ? lock_is_held_type+0x9f/0x120 [ 30.557394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.558003] ? mtree_range_walk+0x632/0x900 [ 30.558556] ? mas_walk+0x5c7/0x7c0 [ 30.559060] do_vmi_munmap+0x1f1/0x2b0 [ 30.559559] mmap_region+0x1f9/0x2660 [ 30.560044] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.560556] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.561279] ? __pfx_lock_acquire+0x10/0x10 [ 30.561813] ? __pfx_mmap_region+0x10/0x10 [ 30.562348] ? security_mmap_addr+0x7d/0xa0 [ 30.562900] ? get_unmapped_area+0x1f5/0x3f0 [ 30.563465] do_mmap+0x854/0xf00 [ 30.563910] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.564416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.564991] ksys_mmap_pgoff+0x3af/0x500 [ 30.565526] do_syscall_64+0x3f/0x90 [ 30.566020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.566696] RIP: 0033:0x7f96de49cd82 [ 30.567164] 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 [ 30.569320] RSP: 002b:00007ffcb44dbf28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.570244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96de49cd82 [ 30.571122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96dd8d6000 [ 30.571970] RBP: 00007f96dd8d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.572820] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576d89b6ec0 [ 30.573656] R13: 00007ffcb44dbf40 R14: 00007ffcb44dbf70 R15: 00007ffcb44dc2d0 [ 30.574554] [ 30.574847] [ 30.575079] Allocated by task 213: [ 30.575519] kasan_save_stack+0x22/0x50 [ 30.576021] kasan_set_track+0x25/0x30 [ 30.576515] __kasan_slab_alloc+0x59/0x70 [ 30.577037] kmem_cache_alloc+0x16b/0x370 [ 30.577551] vm_area_dup+0x20/0x160 [ 30.578008] __split_vma+0x170/0x950 [ 30.578476] split_vma+0xc6/0x110 [ 30.578919] mprotect_fixup+0x8d2/0xb30 [ 30.579439] do_mprotect_pkey+0x87e/0xd40 [ 30.579954] __x64_sys_mprotect+0x78/0xc0 [ 30.580481] do_syscall_64+0x3f/0x90 [ 30.580951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.581609] [ 30.581828] Freed by task 213: [ 30.582225] kasan_save_stack+0x22/0x50 [ 30.582725] kasan_set_track+0x25/0x30 [ 30.583219] kasan_save_free_info+0x2b/0x50 [ 30.583750] __kasan_slab_free+0x10a/0x190 [ 30.584279] kmem_cache_free+0x10d/0x4d0 [ 30.584786] rcu_core+0x8c8/0x2860 [ 30.585236] __do_softirq+0x1b7/0x7d4 [ 30.585710] [ 30.585923] Last potentially related work creation: [ 30.586508] kasan_save_stack+0x22/0x50 [ 30.587028] __kasan_record_aux_stack+0x8e/0xa0 [ 30.587652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.588294] remove_vma+0x139/0x170 [ 30.588744] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.589297] do_vmi_munmap+0x1f1/0x2b0 [ 30.589786] __vm_munmap+0x138/0x3a0 [ 30.590250] __x64_sys_munmap+0x59/0x80 [ 30.590745] do_syscall_64+0x3f/0x90 [ 30.591233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.591879] [ 30.592092] Second to last potentially related work creation: [ 30.592766] kasan_save_stack+0x22/0x50 [ 30.593266] __kasan_record_aux_stack+0x8e/0xa0 [ 30.593831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.594467] remove_vma+0x139/0x170 [ 30.594926] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.595506] do_vmi_munmap+0x1f1/0x2b0 [ 30.595999] mmap_region+0x1f9/0x2660 [ 30.596475] do_mmap+0x854/0xf00 [ 30.596903] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.597390] ksys_mmap_pgoff+0x3af/0x500 [ 30.597888] do_syscall_64+0x3f/0x90 [ 30.598360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599005] [ 30.599218] The buggy address belongs to the object at ffff88801598dae0 [ 30.599218] which belongs to the cache vm_area_struct of size 168 [ 30.600681] The buggy address is located 88 bytes inside of [ 30.600681] freed 168-byte region [ffff88801598dae0, ffff88801598db88) [ 30.602093] [ 30.602307] The buggy address belongs to the physical page: [ 30.602965] page:00000000a3118458 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1598d [ 30.604055] memcg:ffff88801598b001 [ 30.604482] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.605173] page_type: 0xffffffff() [ 30.605632] raw: 0100000000000200 ffff8880087a0c80 ffffea00002cdf00 dead000000000005 [ 30.606556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801598b001 [ 30.607474] page dumped because: kasan: bad access detected [ 30.608131] [ 30.608345] Memory state around the buggy address: [ 30.608917] ffff88801598da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.609778] ffff88801598da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.610628] >ffff88801598db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.611490] ^ [ 30.612101] ffff88801598db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.612959] ffff88801598dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.613799] ================================================================== [ 30.614697] Disabling lock debugging due to kernel taint [ 32.904161] BUG: Bad rss-counter state mm:000000003972f1bf type:MM_FILEPAGES val:33 [ 32.905405] BUG: Bad rss-counter state mm:000000003972f1bf type:MM_ANONPAGES val:22 [ 33.391852] BUG: Bad rss-counter state mm:00000000caf558aa type:MM_FILEPAGES val:33 [ 33.392854] BUG: Bad rss-counter state mm:00000000caf558aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17328' (ECDSA) to the list of known hosts. 2023/06/21 04:25:43 fuzzer started 2023/06/21 04:25:43 dialing manager at localhost:36067 2023/06/21 04:25:43 checking machine... 2023/06/21 04:25:43 checking revisions... [ 34.018522] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:25:43 testing simple program... [ 34.066611] cgroup: Unknown subsys name 'net' [ 34.105174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:43 Registers: info registers vcpu 0 RAX=fffffffffd6965e3 RBX=ffffffff85fa4f4c RCX=ffffffff8363b5a6 RDX=0000000000000000 RSI=ffffffff863b353c RDI=ffffffff85fa4f3c RBP=ffffffff85fa4f3c RSP=ffff88801c9e78f0 R8 =ffffffff863b353c R9 =ffff88801c9e79e8 R10=0000000000038001 R11=000000000008a95e R12=ffffffff85fa4f5c R13=ffffffff85fa4f3c R14=ffffffff85fa4f3c 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 00007f00b2e9d900 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=00007f00b3454618 CR3=000000000f15e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7d1f002960 CR3=0000000013b0c000 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=9392097421122793af449836bf65cc88 XMM02=000000000011c818eff9b2d0a8fce9cb XMM03=000000000011c8e82c67c8bc2e329bc3 XMM04=ed64e8e473390ccd00000000000ae988 XMM05=19e9129bd510f2350000000000131950 XMM06=8619aa8ab85fad4500000000001303c0 XMM07=e042d86d42eb936e0000000000120a00 XMM08=b4cf202f25622161000000000011c8e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000