syzkaller login: [ 23.816864] BUG: Bad rss-counter state mm:0000000021332cd8 type:MM_FILEPAGES val:33 [ 23.818849] BUG: Bad rss-counter state mm:0000000021332cd8 type:MM_ANONPAGES val:22 [ 23.982524] ================================================================== [ 23.983654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.984772] Read of size 8 at addr ffff88800ffd2ed8 by task sshd/219 [ 23.985846] [ 23.986069] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.986933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.987940] Call Trace: [ 23.988262] [ 23.988541] dump_stack_lvl+0x91/0xf0 [ 23.989043] print_report+0xcc/0x620 [ 23.989529] ? __virt_addr_valid+0x102/0x340 [ 23.990078] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.990698] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.991307] kasan_report+0xbe/0xf0 [ 23.991789] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.992414] vma_interval_tree_remove+0xc75/0xec0 [ 23.993024] vma_prepare+0xc54/0x11a0 [ 23.993503] __split_vma+0x5af/0x950 [ 23.993980] ? __pfx___split_vma+0x10/0x10 [ 23.994507] ? find_held_lock+0x2c/0x110 [ 23.995020] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.995578] ? lock_is_held_type+0x9f/0x120 [ 23.996114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.996709] ? mtree_range_walk+0x632/0x900 [ 23.997284] ? mas_walk+0x5c7/0x7c0 [ 23.997757] do_vmi_munmap+0x1f1/0x2b0 [ 23.998244] mmap_region+0x1f9/0x2660 [ 23.998720] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.999224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.999928] ? __pfx_lock_acquire+0x10/0x10 [ 24.000451] ? __pfx_mmap_region+0x10/0x10 [ 24.000980] ? security_mmap_addr+0x7d/0xa0 [ 24.001499] ? get_unmapped_area+0x1f5/0x3f0 [ 24.002045] do_mmap+0x854/0xf00 [ 24.002474] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.002964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.003513] ksys_mmap_pgoff+0x3af/0x500 [ 24.004009] do_syscall_64+0x3f/0x90 [ 24.004483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.005125] RIP: 0033:0x7fc6ec191d82 [ 24.005574] 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 [ 24.007655] RSP: 002b:00007ffda5d28fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.008545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6ec191d82 [ 24.009445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6eb5cb000 [ 24.010297] RBP: 00007fc6eb5cb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.011158] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555c4234d90 [ 24.011999] R13: 00007ffda5d28fd0 R14: 00007ffda5d29000 R15: 00007ffda5d29360 [ 24.012860] [ 24.013148] [ 24.013367] Allocated by task 212: [ 24.013793] kasan_save_stack+0x22/0x50 [ 24.014289] kasan_set_track+0x25/0x30 [ 24.014791] __kasan_slab_alloc+0x59/0x70 [ 24.015316] kmem_cache_alloc+0x16b/0x370 [ 24.015824] vm_area_dup+0x20/0x160 [ 24.016281] __split_vma+0x170/0x950 [ 24.016745] split_vma+0xc6/0x110 [ 24.017203] mprotect_fixup+0x8d2/0xb30 [ 24.017696] do_mprotect_pkey+0x87e/0xd40 [ 24.018210] __x64_sys_mprotect+0x78/0xc0 [ 24.018724] do_syscall_64+0x3f/0x90 [ 24.019188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.019816] [ 24.020028] Freed by task 212: [ 24.020411] kasan_save_stack+0x22/0x50 [ 24.020911] kasan_set_track+0x25/0x30 [ 24.021395] kasan_save_free_info+0x2b/0x50 [ 24.021917] __kasan_slab_free+0x10a/0x190 [ 24.022440] kmem_cache_free+0x10d/0x4d0 [ 24.022940] rcu_core+0x8c8/0x2860 [ 24.023377] __do_softirq+0x1b7/0x7d4 [ 24.023843] [ 24.024055] Last potentially related work creation: [ 24.024625] kasan_save_stack+0x22/0x50 [ 24.025124] __kasan_record_aux_stack+0x8e/0xa0 [ 24.025683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.026363] remove_vma+0x139/0x170 [ 24.026834] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.027385] do_vmi_munmap+0x1f1/0x2b0 [ 24.027860] __vm_munmap+0x138/0x3a0 [ 24.028318] __x64_sys_munmap+0x59/0x80 [ 24.028811] do_syscall_64+0x3f/0x90 [ 24.029285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.029919] [ 24.030138] Second to last potentially related work creation: [ 24.030810] kasan_save_stack+0x22/0x50 [ 24.031304] __kasan_record_aux_stack+0x8e/0xa0 [ 24.031871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.032503] remove_vma+0x139/0x170 [ 24.032951] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.033500] do_vmi_munmap+0x1f1/0x2b0 [ 24.033975] mmap_region+0x1f9/0x2660 [ 24.034445] do_mmap+0x854/0xf00 [ 24.034866] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.035342] ksys_mmap_pgoff+0x3af/0x500 [ 24.035835] do_syscall_64+0x3f/0x90 [ 24.036300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.036950] [ 24.037161] The buggy address belongs to the object at ffff88800ffd2e80 [ 24.037161] which belongs to the cache vm_area_struct of size 168 [ 24.038597] The buggy address is located 88 bytes inside of [ 24.038597] freed 168-byte region [ffff88800ffd2e80, ffff88800ffd2f28) [ 24.039973] [ 24.040183] The buggy address belongs to the physical page: [ 24.040837] page:000000001c70337d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffd2 [ 24.041897] memcg:ffff888013f35e01 [ 24.042317] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.042945] page_type: 0xffffffff() [ 24.043389] raw: 0100000000000200 ffff8880087a0c80 ffffea0000398540 dead000000000008 [ 24.044289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f35e01 [ 24.045188] page dumped because: kasan: bad access detected [ 24.045834] [ 24.046047] Memory state around the buggy address: [ 24.046611] ffff88800ffd2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.047453] ffff88800ffd2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.048284] >ffff88800ffd2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.049141] ^ [ 24.049863] ffff88800ffd2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.050699] ffff88800ffd2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.051531] ================================================================== [ 24.052521] Disabling lock debugging due to kernel taint [ 26.237786] BUG: Bad rss-counter state mm:000000009b72be60 type:MM_FILEPAGES val:33 [ 26.238967] BUG: Bad rss-counter state mm:000000009b72be60 type:MM_ANONPAGES val:22 [ 26.732992] BUG: Bad rss-counter state mm:0000000061f644b5 type:MM_FILEPAGES val:33 [ 26.734008] BUG: Bad rss-counter state mm:0000000061f644b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23772' (ECDSA) to the list of known hosts. 2023/06/20 12:11:06 fuzzer started 2023/06/20 12:11:06 dialing manager at localhost:36067 2023/06/20 12:11:06 checking machine... 2023/06/20 12:11:06 checking revisions... [ 27.487497] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:11:06 testing simple program... [ 27.535330] cgroup: Unknown subsys name 'net' [ 27.577920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:11:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85beb1c0 RCX=000000000000000b RDX=0000000000000710 RSI=0000000000000000 RDI=ffff88800dd1ec70 RBP=0000000000000001 RSP=ffff8880185b7d38 R8 =0000000000000005 R9 =0000000000000000 R10=ffff88800dd1e870 R11=00000000000b6a61 R12=ffff88800dd1e800 R13=0000000000000dc0 R14=ffff88800bb37000 R15=0000000000000780 RIP=ffffffff8451341a RFL=00000202 [-------] 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 00007f09e4079900 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=00007f09e462e650 CR3=000000000de90000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc047a RBX=ffffffff85e023d4 RCX=ffffffff81846193 RDX=0000000000000000 RSI=ffffffff8613f3f6 RDI=ffffffff85e023b8 RBP=ffffffff85e023cc RSP=ffff8880145ff318 R8 =ffffffff8613f3f6 R9 =ffff8880145ff410 R10=0000000000038001 R11=0000000000021e7d R12=ffffffff85e023dc R13=ffffffff85e023b8 R14=ffffffff85e023c8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fbe7c066900 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=00007fbe7b4dcef0 CR3=000000000d92c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=378aa68865f8d43d00000000000ae988 XMM05=494abd26e3982c6300000000001353b0 XMM06=dfcdbad4f1609c370000000000133ed8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000