syzkaller login: [ 33.653307] BUG: Bad rss-counter state mm:00000000d40ff60b type:MM_FILEPAGES val:33 [ 33.654703] BUG: Bad rss-counter state mm:00000000d40ff60b type:MM_ANONPAGES val:22 [ 33.697812] ================================================================== [ 33.698907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.699951] Read of size 8 at addr ffff88801a294d08 by task sshd/220 [ 33.700722] [ 33.700956] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.701842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.702839] Call Trace: [ 33.703173] [ 33.703455] dump_stack_lvl+0x91/0xf0 [ 33.703971] print_report+0xcc/0x620 [ 33.704461] ? __virt_addr_valid+0x102/0x340 [ 33.705038] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.705659] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.706280] kasan_report+0xbe/0xf0 [ 33.706758] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.707412] vma_interval_tree_remove+0xc75/0xec0 [ 33.708039] vma_prepare+0xc54/0x11a0 [ 33.708529] __split_vma+0x5af/0x950 [ 33.709030] ? __pfx___split_vma+0x10/0x10 [ 33.709563] ? find_held_lock+0x2c/0x110 [ 33.710099] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.710673] ? lock_is_held_type+0x9f/0x120 [ 33.711234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.711850] ? mtree_range_walk+0x632/0x900 [ 33.712421] ? mas_walk+0x5c7/0x7c0 [ 33.712904] do_vmi_munmap+0x1f1/0x2b0 [ 33.713427] mmap_region+0x1f9/0x2660 [ 33.713924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.714442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.715198] ? __pfx_lock_acquire+0x10/0x10 [ 33.715725] ? __pfx_mmap_region+0x10/0x10 [ 33.716268] ? security_mmap_addr+0x7d/0xa0 [ 33.716799] ? get_unmapped_area+0x1f5/0x3f0 [ 33.717381] do_mmap+0x854/0xf00 [ 33.717822] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.718334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.718930] ksys_mmap_pgoff+0x3af/0x500 [ 33.719455] do_syscall_64+0x3f/0x90 [ 33.719947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.720594] RIP: 0033:0x7f9ab617ad82 [ 33.721079] 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 [ 33.723244] RSP: 002b:00007ffc5b1c5478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.724165] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ab617ad82 [ 33.725041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ab55b4000 [ 33.725894] RBP: 00007f9ab55b4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.726746] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5dc2c7d90 [ 33.727615] R13: 00007ffc5b1c5490 R14: 00007ffc5b1c54c0 R15: 00007ffc5b1c5820 [ 33.728481] [ 33.728773] [ 33.729017] Allocated by task 213: [ 33.729445] kasan_save_stack+0x22/0x50 [ 33.729961] kasan_set_track+0x25/0x30 [ 33.730456] __kasan_slab_alloc+0x59/0x70 [ 33.731177] kmem_cache_alloc+0x16b/0x370 [ 33.731826] vm_area_dup+0x20/0x160 [ 33.732384] __split_vma+0x170/0x950 [ 33.732954] split_vma+0xc6/0x110 [ 33.733487] mprotect_fixup+0x8d2/0xb30 [ 33.734109] do_mprotect_pkey+0x87e/0xd40 [ 33.734744] __x64_sys_mprotect+0x78/0xc0 [ 33.735419] do_syscall_64+0x3f/0x90 [ 33.735999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.736795] [ 33.737064] Freed by task 213: [ 33.737549] kasan_save_stack+0x22/0x50 [ 33.738166] kasan_set_track+0x25/0x30 [ 33.738772] kasan_save_free_info+0x2b/0x50 [ 33.739444] __kasan_slab_free+0x10a/0x190 [ 33.740098] kmem_cache_free+0x10d/0x4d0 [ 33.740722] rcu_core+0x8c8/0x2860 [ 33.741255] __do_softirq+0x1b7/0x7d4 [ 33.741848] [ 33.742110] Last potentially related work creation: [ 33.742841] kasan_save_stack+0x22/0x50 [ 33.743463] __kasan_record_aux_stack+0x8e/0xa0 [ 33.744169] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.744959] remove_vma+0x139/0x170 [ 33.745503] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.746187] do_vmi_munmap+0x1f1/0x2b0 [ 33.746773] __vm_munmap+0x138/0x3a0 [ 33.747380] __x64_sys_munmap+0x59/0x80 [ 33.747970] do_syscall_64+0x3f/0x90 [ 33.748442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.749075] [ 33.749295] The buggy address belongs to the object at ffff88801a294cb0 [ 33.749295] which belongs to the cache vm_area_struct of size 168 [ 33.750767] The buggy address is located 88 bytes inside of [ 33.750767] freed 168-byte region [ffff88801a294cb0, ffff88801a294d58) [ 33.752179] [ 33.752394] The buggy address belongs to the physical page: [ 33.753051] page:000000000e4823a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a294 [ 33.754136] memcg:ffff88800d4cd701 [ 33.754561] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.755223] page_type: 0xffffffff() [ 33.755673] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.756604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4cd701 [ 33.757515] page dumped because: kasan: bad access detected [ 33.758183] [ 33.758402] Memory state around the buggy address: [ 33.759008] ffff88801a294c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.759870] ffff88801a294c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.760724] >ffff88801a294d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.761571] ^ [ 33.762013] ffff88801a294d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.762878] ffff88801a294e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.763750] ================================================================== [ 33.764934] Disabling lock debugging due to kernel taint [ 35.835434] BUG: Bad rss-counter state mm:000000009b8eff92 type:MM_FILEPAGES val:33 [ 35.836773] BUG: Bad rss-counter state mm:000000009b8eff92 type:MM_ANONPAGES val:22 [ 36.308392] BUG: Bad rss-counter state mm:000000008b9e58a3 type:MM_FILEPAGES val:33 [ 36.309558] BUG: Bad rss-counter state mm:000000008b9e58a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63971' (ECDSA) to the list of known hosts. 2023/06/20 02:23:09 fuzzer started 2023/06/20 02:23:09 dialing manager at localhost:44161 2023/06/20 02:23:09 checking machine... 2023/06/20 02:23:09 checking revisions... [ 36.965941] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:23:09 testing simple program... [ 37.013918] cgroup: Unknown subsys name 'net' [ 37.064560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:06 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000039500 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000006 RDI=ffff88806ce39f48 RBP=ffff88806ce09dc8 RSP=ffff88806ce09d88 R8 =ffff88806ce39f40 R9 =ffffed100d9c13a3 R10=0000000000000003 R11=000000171ea65db8 R12=ffff88806ce39500 R13=ffff88806ce39518 R14=0000000000000000 R15=ffff88801a041b40 RIP=ffffffff8124f58c 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 00007f2152c08900 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=00007fffe9d29000 CR3=000000000eb00000 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=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 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=00007f08428bc570 CR3=000000000ecb2000 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=2039303a33323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000