syzkaller login: [ 30.538598] BUG: Bad rss-counter state mm:00000000c8475c3c type:MM_FILEPAGES val:33 [ 30.539935] BUG: Bad rss-counter state mm:00000000c8475c3c type:MM_ANONPAGES val:22 [ 30.699119] ================================================================== [ 30.700013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.700925] Read of size 8 at addr ffff888019df0798 by task sshd/220 [ 30.701678] [ 30.701894] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.702827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.703782] Call Trace: [ 30.704097] [ 30.704374] dump_stack_lvl+0x91/0xf0 [ 30.704876] print_report+0xcc/0x620 [ 30.705348] ? __virt_addr_valid+0x102/0x340 [ 30.705887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.706494] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707098] kasan_report+0xbe/0xf0 [ 30.707571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708180] vma_interval_tree_remove+0xc75/0xec0 [ 30.708772] vma_prepare+0xc54/0x11a0 [ 30.709243] __split_vma+0x5af/0x950 [ 30.709704] ? __pfx___split_vma+0x10/0x10 [ 30.710228] ? find_held_lock+0x2c/0x110 [ 30.710739] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.711298] ? lock_is_held_type+0x9f/0x120 [ 30.711837] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.712430] ? mtree_range_walk+0x632/0x900 [ 30.712972] ? mas_walk+0x5c7/0x7c0 [ 30.713440] do_vmi_munmap+0x1f1/0x2b0 [ 30.713929] mmap_region+0x1f9/0x2660 [ 30.714407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.714911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.715630] ? __pfx_lock_acquire+0x10/0x10 [ 30.716154] ? __pfx_mmap_region+0x10/0x10 [ 30.716671] ? security_mmap_addr+0x7d/0xa0 [ 30.717191] ? get_unmapped_area+0x1f5/0x3f0 [ 30.717736] do_mmap+0x854/0xf00 [ 30.718168] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.718657] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.719209] ksys_mmap_pgoff+0x3af/0x500 [ 30.719716] do_syscall_64+0x3f/0x90 [ 30.720189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.720829] RIP: 0033:0x7f8997240d82 [ 30.721282] 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 [ 30.723382] RSP: 002b:00007ffde69a3148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.724271] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8997240d82 [ 30.725102] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f899667a000 [ 30.726054] RBP: 00007f899667a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.726913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cc694bf60 [ 30.727788] R13: 00007ffde69a3160 R14: 00007ffde69a3190 R15: 00007ffde69a34f0 [ 30.728657] [ 30.728950] [ 30.729165] Allocated by task 213: [ 30.729597] kasan_save_stack+0x22/0x50 [ 30.730108] kasan_set_track+0x25/0x30 [ 30.730607] __kasan_slab_alloc+0x59/0x70 [ 30.731134] kmem_cache_alloc+0x16b/0x370 [ 30.731665] vm_area_dup+0x20/0x160 [ 30.732122] __split_vma+0x170/0x950 [ 30.732588] split_vma+0xc6/0x110 [ 30.733029] mprotect_fixup+0x8d2/0xb30 [ 30.733534] do_mprotect_pkey+0x87e/0xd40 [ 30.734058] __x64_sys_mprotect+0x78/0xc0 [ 30.734581] do_syscall_64+0x3f/0x90 [ 30.735059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735717] [ 30.735936] Freed by task 19: [ 30.736328] kasan_save_stack+0x22/0x50 [ 30.736835] kasan_set_track+0x25/0x30 [ 30.737424] kasan_save_free_info+0x2b/0x50 [ 30.737943] __kasan_slab_free+0x10a/0x190 [ 30.738460] kmem_cache_free+0x10d/0x4d0 [ 30.738955] rcu_core+0x8c8/0x2860 [ 30.739396] __do_softirq+0x1b7/0x7d4 [ 30.739862] [ 30.740072] Last potentially related work creation: [ 30.740648] kasan_save_stack+0x22/0x50 [ 30.741143] __kasan_record_aux_stack+0x8e/0xa0 [ 30.741709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.742349] remove_vma+0x139/0x170 [ 30.742799] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.743348] do_vmi_munmap+0x1f1/0x2b0 [ 30.743844] __vm_munmap+0x138/0x3a0 [ 30.744310] __x64_sys_munmap+0x59/0x80 [ 30.744806] do_syscall_64+0x3f/0x90 [ 30.745276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745923] [ 30.746133] The buggy address belongs to the object at ffff888019df0740 [ 30.746133] which belongs to the cache vm_area_struct of size 168 [ 30.747587] The buggy address is located 88 bytes inside of [ 30.747587] freed 168-byte region [ffff888019df0740, ffff888019df07e8) [ 30.748965] [ 30.749176] The buggy address belongs to the physical page: [ 30.749825] page:000000005a0bb941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19df0 [ 30.750904] memcg:ffff88801685a001 [ 30.751319] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.751964] page_type: 0xffffffff() [ 30.752404] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.753311] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801685a001 [ 30.754193] page dumped because: kasan: bad access detected [ 30.754845] [ 30.755058] Memory state around the buggy address: [ 30.755645] ffff888019df0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.756481] ffff888019df0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.757316] >ffff888019df0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.758148] ^ [ 30.758630] ffff888019df0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.759486] ffff888019df0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.760315] ================================================================== [ 30.761283] Disabling lock debugging due to kernel taint [ 32.416565] BUG: Bad rss-counter state mm:000000007ab4746d type:MM_FILEPAGES val:33 [ 32.417585] BUG: Bad rss-counter state mm:000000007ab4746d type:MM_ANONPAGES val:22 [ 32.834850] BUG: Bad rss-counter state mm:000000009ce5410a type:MM_FILEPAGES val:33 [ 32.836045] BUG: Bad rss-counter state mm:000000009ce5410a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49121' (ECDSA) to the list of known hosts. 2023/06/20 12:56:29 fuzzer started 2023/06/20 12:56:29 dialing manager at localhost:36067 2023/06/20 12:56:29 checking machine... 2023/06/20 12:56:29 checking revisions... [ 33.482297] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:56:29 testing simple program... [ 33.535175] cgroup: Unknown subsys name 'net' [ 33.577310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:56:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f3a9cecbc00 CR3=000000000c6a8000 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=b5ab4e4b0df0c1b9ac49a9b44b69a2ce XMM02=0000000000119a40ec2efd57dc4c00df XMM03=0000000000120f208bafe7b582f5b0df XMM04=6dcd15a32b9be34100000000000ae988 XMM05=ada2d7aa2139cff80000000000131ea0 XMM06=4fda316b135da52b0000000000130f40 XMM07=e042d86d42eb936e00000000001211a0 XMM08=8bafe7b582f5b0df0000000000119aa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016b57e30 RCX=0000000000000000 RDX=ffff88800daad1c0 RSI=ffffffff8386c5e6 RDI=ffffffff85ba4dc0 RBP=ffffffff85ba4dc0 RSP=ffff888016b57cf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888016cfb000 R13=ffffffff84d65520 R14=0000000000000000 R15=ffff8880161e8b80 RIP=ffffffff845361cb 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 00007f7f6675b900 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=00007ffce93ee000 CR3=00000000184f2000 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