syzkaller login: [ 38.685796] BUG: Bad rss-counter state mm:0000000087f00822 type:MM_FILEPAGES val:33 [ 38.686993] BUG: Bad rss-counter state mm:0000000087f00822 type:MM_ANONPAGES val:22 [ 38.840937] ================================================================== [ 38.842005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.843115] Read of size 8 at addr ffff888019552ed8 by task sshd/220 [ 38.844160] [ 38.844384] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.845247] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.846233] Call Trace: [ 38.846555] [ 38.846841] dump_stack_lvl+0x91/0xf0 [ 38.847341] print_report+0xcc/0x620 [ 38.847839] ? __virt_addr_valid+0x102/0x340 [ 38.848390] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849003] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849617] kasan_report+0xbe/0xf0 [ 38.850090] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.850716] vma_interval_tree_remove+0xc75/0xec0 [ 38.851346] vma_prepare+0xc54/0x11a0 [ 38.851840] __split_vma+0x5af/0x950 [ 38.852312] ? __pfx___split_vma+0x10/0x10 [ 38.852849] ? find_held_lock+0x2c/0x110 [ 38.853370] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.853938] ? lock_is_held_type+0x9f/0x120 [ 38.854477] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.855086] ? mtree_range_walk+0x632/0x900 [ 38.855682] ? mas_walk+0x5c7/0x7c0 [ 38.856158] do_vmi_munmap+0x1f1/0x2b0 [ 38.856659] mmap_region+0x1f9/0x2660 [ 38.857145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.857659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.858377] ? __pfx_lock_acquire+0x10/0x10 [ 38.858909] ? __pfx_mmap_region+0x10/0x10 [ 38.859483] ? security_mmap_addr+0x7d/0xa0 [ 38.860012] ? get_unmapped_area+0x1f5/0x3f0 [ 38.860564] do_mmap+0x854/0xf00 [ 38.861006] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.861503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.862064] ksys_mmap_pgoff+0x3af/0x500 [ 38.862573] do_syscall_64+0x3f/0x90 [ 38.863051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.863731] RIP: 0033:0x7f81e4e27d82 [ 38.864193] 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 [ 38.866323] RSP: 002b:00007fff3126c868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.867236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81e4e27d82 [ 38.868120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81e4261000 [ 38.868970] RBP: 00007f81e4261000 R08: 0000000000000009 R09: 0000000000001000 [ 38.869814] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cf032cec0 [ 38.870661] R13: 00007fff3126c880 R14: 00007fff3126c8b0 R15: 00007fff3126cc10 [ 38.871567] [ 38.871860] [ 38.872074] Allocated by task 213: [ 38.872498] kasan_save_stack+0x22/0x50 [ 38.873039] kasan_set_track+0x25/0x30 [ 38.873574] __kasan_slab_alloc+0x59/0x70 [ 38.874138] kmem_cache_alloc+0x16b/0x370 [ 38.874698] vm_area_dup+0x20/0x160 [ 38.875191] __split_vma+0x170/0x950 [ 38.875730] split_vma+0xc6/0x110 [ 38.876207] mprotect_fixup+0x8d2/0xb30 [ 38.876751] do_mprotect_pkey+0x87e/0xd40 [ 38.877315] __x64_sys_mprotect+0x78/0xc0 [ 38.877880] do_syscall_64+0x3f/0x90 [ 38.878395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.879089] [ 38.879331] Freed by task 213: [ 38.879768] kasan_save_stack+0x22/0x50 [ 38.880319] kasan_set_track+0x25/0x30 [ 38.880861] kasan_save_free_info+0x2b/0x50 [ 38.881443] __kasan_slab_free+0x10a/0x190 [ 38.882022] kmem_cache_free+0x10d/0x4d0 [ 38.882563] rcu_core+0x8c8/0x2860 [ 38.883030] __do_softirq+0x1b7/0x7d4 [ 38.883577] [ 38.883803] Last potentially related work creation: [ 38.884420] kasan_save_stack+0x22/0x50 [ 38.884945] __kasan_record_aux_stack+0x8e/0xa0 [ 38.885545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.886227] remove_vma+0x139/0x170 [ 38.886700] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.887284] do_vmi_munmap+0x1f1/0x2b0 [ 38.887816] __vm_munmap+0x138/0x3a0 [ 38.888303] __x64_sys_munmap+0x59/0x80 [ 38.888829] do_syscall_64+0x3f/0x90 [ 38.889330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.890008] [ 38.890234] The buggy address belongs to the object at ffff888019552e80 [ 38.890234] which belongs to the cache vm_area_struct of size 168 [ 38.891841] The buggy address is located 88 bytes inside of [ 38.891841] freed 168-byte region [ffff888019552e80, ffff888019552f28) [ 38.893335] [ 38.893562] The buggy address belongs to the physical page: [ 38.894259] page:00000000d3924a22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19552 [ 38.895480] memcg:ffff88800de74b01 [ 38.895939] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.896681] page_type: 0xffffffff() [ 38.897155] raw: 0100000000000200 ffff88800879fc80 ffffea000037e6c0 dead000000000003 [ 38.898129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de74b01 [ 38.899093] page dumped because: kasan: bad access detected [ 38.899828] [ 38.900060] Memory state around the buggy address: [ 38.900682] ffff888019552d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.901597] ffff888019552e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.902508] >ffff888019552e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.903450] ^ [ 38.904224] ffff888019552f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.905139] ffff888019552f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.906034] ================================================================== [ 38.907049] Disabling lock debugging due to kernel taint [ 41.004277] sshd (220) used greatest stack depth: 24120 bytes left [ 41.005517] BUG: Bad rss-counter state mm:000000001930cec6 type:MM_FILEPAGES val:33 [ 41.007138] BUG: Bad rss-counter state mm:000000001930cec6 type:MM_ANONPAGES val:22 [ 41.435436] BUG: Bad rss-counter state mm:0000000065d14bfb type:MM_FILEPAGES val:33 [ 41.436442] BUG: Bad rss-counter state mm:0000000065d14bfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2777' (ECDSA) to the list of known hosts. 2023/06/19 14:24:06 fuzzer started 2023/06/19 14:24:06 dialing manager at localhost:44161 2023/06/19 14:24:06 checking machine... 2023/06/19 14:24:06 checking revisions... [ 42.135073] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:24:06 testing simple program... [ 42.185171] cgroup: Unknown subsys name 'net' [ 42.242556] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:02 Registers: info registers vcpu 0 RAX=0000565498ba22ce RBX=0000565498b92740 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000006 RDI=0000565498ba22c0 RBP=0000000000000660 RSP=00007ffeef869400 R8 =0000565498ba5280 R9 =000000000000000e R10=0000565498b92770 R11=0000000000000000 R12=0000565498b7c350 R13=0000565498ba22c0 R14=00007ffeef869460 R15=0000000000000000 RIP=00007fd8895484b0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd8895a1900 00000000 00000000 GS =0000 0000000000000000 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=00007fd889b590b0 CR3=0000000017f74000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc4801a678 CR3=000000000dacc000 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=2035303a34323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a34323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000