syzkaller login: [ 30.826637] BUG: Bad rss-counter state mm:00000000a53ec03c type:MM_FILEPAGES val:33 [ 30.827936] BUG: Bad rss-counter state mm:00000000a53ec03c type:MM_ANONPAGES val:22 [ 30.989263] ================================================================== [ 30.990191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.991126] Read of size 8 at addr ffff8880099423f8 by task sshd/219 [ 30.991909] [ 30.992130] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.993214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.994196] Call Trace: [ 30.994519] [ 30.994800] dump_stack_lvl+0x91/0xf0 [ 30.995416] print_report+0xcc/0x620 [ 30.996027] ? __virt_addr_valid+0x102/0x340 [ 30.996698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998219] kasan_report+0xbe/0xf0 [ 30.998805] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999601] vma_interval_tree_remove+0xc75/0xec0 [ 31.000345] vma_prepare+0xc54/0x11a0 [ 31.000936] __split_vma+0x5af/0x950 [ 31.001522] ? __pfx___split_vma+0x10/0x10 [ 31.002194] ? find_held_lock+0x2c/0x110 [ 31.002838] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.003563] ? lock_is_held_type+0x9f/0x120 [ 31.004149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004758] ? mtree_range_walk+0x632/0x900 [ 31.005309] ? mas_walk+0x5c7/0x7c0 [ 31.005789] do_vmi_munmap+0x1f1/0x2b0 [ 31.006281] mmap_region+0x1f9/0x2660 [ 31.006760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.007265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.008003] ? __pfx_lock_acquire+0x10/0x10 [ 31.008529] ? __pfx_mmap_region+0x10/0x10 [ 31.009063] ? security_mmap_addr+0x7d/0xa0 [ 31.009589] ? get_unmapped_area+0x1f5/0x3f0 [ 31.010137] do_mmap+0x854/0xf00 [ 31.010573] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.011079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.011669] ksys_mmap_pgoff+0x3af/0x500 [ 31.012184] do_syscall_64+0x3f/0x90 [ 31.012666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.013306] RIP: 0033:0x7fe270572d82 [ 31.013763] 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 [ 31.015891] RSP: 002b:00007ffe3a702c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.016788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe270572d82 [ 31.017639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe26f9ac000 [ 31.018482] RBP: 00007fe26f9ac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.019329] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563214ad0f70 [ 31.020187] R13: 00007ffe3a702cb0 R14: 00007ffe3a702ce0 R15: 00007ffe3a703040 [ 31.021035] [ 31.021326] [ 31.021541] Allocated by task 212: [ 31.021973] kasan_save_stack+0x22/0x50 [ 31.022474] kasan_set_track+0x25/0x30 [ 31.022966] __kasan_slab_alloc+0x59/0x70 [ 31.023485] kmem_cache_alloc+0x16b/0x370 [ 31.024009] vm_area_dup+0x20/0x160 [ 31.024469] __split_vma+0x170/0x950 [ 31.024943] split_vma+0xc6/0x110 [ 31.025388] mprotect_fixup+0x8d2/0xb30 [ 31.025883] do_mprotect_pkey+0x87e/0xd40 [ 31.026408] __x64_sys_mprotect+0x78/0xc0 [ 31.026926] do_syscall_64+0x3f/0x90 [ 31.027395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.028059] [ 31.028275] Freed by task 212: [ 31.028666] kasan_save_stack+0x22/0x50 [ 31.029167] kasan_set_track+0x25/0x30 [ 31.029659] kasan_save_free_info+0x2b/0x50 [ 31.030195] __kasan_slab_free+0x10a/0x190 [ 31.030728] kmem_cache_free+0x10d/0x4d0 [ 31.031244] rcu_core+0x8c8/0x2860 [ 31.031696] __do_softirq+0x1b7/0x7d4 [ 31.032174] [ 31.032394] Last potentially related work creation: [ 31.032973] kasan_save_stack+0x22/0x50 [ 31.033473] __kasan_record_aux_stack+0x8e/0xa0 [ 31.034039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034773] remove_vma+0x139/0x170 [ 31.035231] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035811] do_vmi_munmap+0x1f1/0x2b0 [ 31.036292] __vm_munmap+0x138/0x3a0 [ 31.036750] __x64_sys_munmap+0x59/0x80 [ 31.037252] do_syscall_64+0x3f/0x90 [ 31.037722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038374] [ 31.038590] The buggy address belongs to the object at ffff8880099423a0 [ 31.038590] which belongs to the cache vm_area_struct of size 168 [ 31.040061] The buggy address is located 88 bytes inside of [ 31.040061] freed 168-byte region [ffff8880099423a0, ffff888009942448) [ 31.041465] [ 31.041681] The buggy address belongs to the physical page: [ 31.042343] page:000000008dc0dcee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9942 [ 31.043439] memcg:ffff88800ed24c01 [ 31.043868] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.044517] page_type: 0xffffffff() [ 31.044972] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365e40 dead000000000002 [ 31.045903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed24c01 [ 31.046819] page dumped because: kasan: bad access detected [ 31.047489] [ 31.047729] Memory state around the buggy address: [ 31.048315] ffff888009942280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.049170] ffff888009942300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.050038] >ffff888009942380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.050885] ^ [ 31.051977] ffff888009942400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.052846] ffff888009942480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.053702] ================================================================== [ 31.054737] Disabling lock debugging due to kernel taint [ 33.560162] BUG: Bad rss-counter state mm:00000000833d3bdc type:MM_FILEPAGES val:33 [ 33.561301] BUG: Bad rss-counter state mm:00000000833d3bdc type:MM_ANONPAGES val:22 [ 33.970072] BUG: Bad rss-counter state mm:000000009f0834ed type:MM_FILEPAGES val:33 [ 33.971708] BUG: Bad rss-counter state mm:000000009f0834ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44682' (ECDSA) to the list of known hosts. 2023/06/20 19:58:59 fuzzer started 2023/06/20 19:58:59 dialing manager at localhost:36067 2023/06/20 19:59:00 checking machine... 2023/06/20 19:59:00 checking revisions... [ 34.768429] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:59:00 testing simple program... [ 34.818153] cgroup: Unknown subsys name 'net' [ 34.861181] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:59 Registers: info registers vcpu 0 RAX=1ffff11001ab6ddb RBX=ffff88800d5b6ea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d5b6ed8 RBP=ffff88800ddec0b8 RSP=ffff8880147b7d28 R8 =0000000000000001 R9 =ffffed10028f6f99 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e283200 R14=ffffffff81ef10be R15=ffff88800ea1b400 RIP=ffffffff818464e2 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 00007fd650875900 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=00007fd64fd0bb50 CR3=00000000099ec000 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=d2f983f12367607f00000000000ae988 XMM05=7ca6052f390bf6c80000000000132718 XMM06=8fee953ffdc7480200000000001314b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83c60bd1 RDX=ffff888016ef8000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018c5f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000009f R11=000009e2000009e2 R12=0000000000000000 R13=000000000000009f R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c086b RFL=00000287 [--S--PC] 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 00007f6e5b3bf900 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=00007fff7026a000 CR3=000000000e6fa000 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