syzkaller login: [ 38.664064] BUG: Bad rss-counter state mm:0000000004dbba46 type:MM_FILEPAGES val:33 [ 38.665141] BUG: Bad rss-counter state mm:0000000004dbba46 type:MM_ANONPAGES val:22 [ 38.831721] ================================================================== [ 38.832692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.833640] Read of size 8 at addr ffff88800cff54e0 by task sshd/225 [ 38.834545] [ 38.834770] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.835640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.836646] Call Trace: [ 38.836967] [ 38.837254] dump_stack_lvl+0x91/0xf0 [ 38.837753] print_report+0xcc/0x620 [ 38.838236] ? __virt_addr_valid+0x102/0x340 [ 38.838790] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.839412] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840076] kasan_report+0xbe/0xf0 [ 38.840564] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.841190] vma_interval_tree_remove+0xc75/0xec0 [ 38.841793] vma_prepare+0xc54/0x11a0 [ 38.842272] __split_vma+0x5af/0x950 [ 38.842746] ? __pfx___split_vma+0x10/0x10 [ 38.843282] ? find_held_lock+0x2c/0x110 [ 38.843819] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.844385] ? lock_is_held_type+0x9f/0x120 [ 38.844923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.845533] ? mtree_range_walk+0x632/0x900 [ 38.846097] ? mas_walk+0x5c7/0x7c0 [ 38.846578] do_vmi_munmap+0x1f1/0x2b0 [ 38.847079] mmap_region+0x1f9/0x2660 [ 38.847562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.848086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.848796] ? __pfx_lock_acquire+0x10/0x10 [ 38.849341] ? __pfx_mmap_region+0x10/0x10 [ 38.849869] ? security_mmap_addr+0x7d/0xa0 [ 38.850405] ? get_unmapped_area+0x1f5/0x3f0 [ 38.850955] do_mmap+0x854/0xf00 [ 38.851404] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.851919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.852490] ksys_mmap_pgoff+0x3af/0x500 [ 38.852992] do_syscall_64+0x3f/0x90 [ 38.853475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854122] RIP: 0033:0x7f9ddd14ad82 [ 38.854584] 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 [ 38.856705] RSP: 002b:00007ffc173d0198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.857607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ddd14ad82 [ 38.858452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ddc584000 [ 38.859295] RBP: 00007f9ddc584000 R08: 0000000000000009 R09: 0000000000001000 [ 38.860156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d92bfdef70 [ 38.860994] R13: 00007ffc173d01b0 R14: 00007ffc173d01e0 R15: 00007ffc173d0540 [ 38.861851] [ 38.862148] [ 38.862362] Allocated by task 218: [ 38.862791] kasan_save_stack+0x22/0x50 [ 38.863291] kasan_set_track+0x25/0x30 [ 38.863812] __kasan_slab_alloc+0x59/0x70 [ 38.864334] kmem_cache_alloc+0x16b/0x370 [ 38.864850] vm_area_dup+0x20/0x160 [ 38.865300] __split_vma+0x170/0x950 [ 38.865767] split_vma+0xc6/0x110 [ 38.866207] mprotect_fixup+0x8d2/0xb30 [ 38.866714] do_mprotect_pkey+0x87e/0xd40 [ 38.867238] __x64_sys_mprotect+0x78/0xc0 [ 38.867774] do_syscall_64+0x3f/0x90 [ 38.868253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.868900] [ 38.869118] Freed by task 218: [ 38.869509] kasan_save_stack+0x22/0x50 [ 38.870017] kasan_set_track+0x25/0x30 [ 38.870511] kasan_save_free_info+0x2b/0x50 [ 38.871038] __kasan_slab_free+0x10a/0x190 [ 38.871570] kmem_cache_free+0x10d/0x4d0 [ 38.872101] rcu_core+0x8c8/0x2860 [ 38.872551] __do_softirq+0x1b7/0x7d4 [ 38.873030] [ 38.873251] Last potentially related work creation: [ 38.873850] kasan_save_stack+0x22/0x50 [ 38.874363] __kasan_record_aux_stack+0x8e/0xa0 [ 38.874937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.875574] remove_vma+0x139/0x170 [ 38.876037] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.876615] do_vmi_munmap+0x1f1/0x2b0 [ 38.877097] __vm_munmap+0x138/0x3a0 [ 38.877569] __x64_sys_munmap+0x59/0x80 [ 38.878065] do_syscall_64+0x3f/0x90 [ 38.878541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.879188] [ 38.879405] The buggy address belongs to the object at ffff88800cff5488 [ 38.879405] which belongs to the cache vm_area_struct of size 168 [ 38.880891] The buggy address is located 88 bytes inside of [ 38.880891] freed 168-byte region [ffff88800cff5488, ffff88800cff5530) [ 38.882294] [ 38.882512] The buggy address belongs to the physical page: [ 38.883172] page:00000000e3973bce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcff5 [ 38.884273] memcg:ffff88801673ef01 [ 38.884702] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.885353] page_type: 0xffffffff() [ 38.885805] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.886718] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801673ef01 [ 38.887630] page dumped because: kasan: bad access detected [ 38.888294] [ 38.888512] Memory state around the buggy address: [ 38.889094] ffff88800cff5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.889952] ffff88800cff5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.890802] >ffff88800cff5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.891669] ^ [ 38.892427] ffff88800cff5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.893277] ffff88800cff5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.894132] ================================================================== [ 38.895164] Disabling lock debugging due to kernel taint [ 41.024219] BUG: Bad rss-counter state mm:000000006923036c type:MM_FILEPAGES val:33 [ 41.025401] BUG: Bad rss-counter state mm:000000006923036c type:MM_ANONPAGES val:22 [ 41.495518] BUG: Bad rss-counter state mm:00000000aa4bba47 type:MM_FILEPAGES val:33 [ 41.496545] BUG: Bad rss-counter state mm:00000000aa4bba47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44640' (ECDSA) to the list of known hosts. 2023/06/20 18:27:38 fuzzer started 2023/06/20 18:27:38 dialing manager at localhost:36067 2023/06/20 18:27:38 checking machine... 2023/06/20 18:27:38 checking revisions... [ 42.218135] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:27:38 testing simple program... [ 42.260660] cgroup: Unknown subsys name 'net' [ 42.301645] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fe608c0 RCX=0000000000000000 RDX=ffff888015e751c0 RSI=ffffffff8367466a RDI=ffff88800fe608c0 RBP=ffffffff83860ae0 RSP=ffff888016fdf970 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00030009ff02000a R12=ffff88800fe60918 R13=ffff88801600a280 R14=ffff888016fdfa88 R15=00000000000000a4 RIP=ffffffff83860ae4 RFL=00000293 [--S-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 00007fa87c93a900 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=00007fa87cef1618 CR3=000000000e800000 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=0000000000000001 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=00007f94fbc05f00 CR3=0000000019944000 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=2038333a37323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a37323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000