syzkaller login: [ 43.031770] BUG: Bad rss-counter state mm:00000000a200f2c6 type:MM_FILEPAGES val:33 [ 43.033269] BUG: Bad rss-counter state mm:00000000a200f2c6 type:MM_ANONPAGES val:22 [ 43.182897] ================================================================== [ 43.183795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.184742] Read of size 8 at addr ffff88800f072880 by task sshd/220 [ 43.185529] [ 43.185750] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.186683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.187664] Call Trace: [ 43.187988] [ 43.188281] dump_stack_lvl+0x91/0xf0 [ 43.188775] print_report+0xcc/0x620 [ 43.189257] ? __virt_addr_valid+0x102/0x340 [ 43.189843] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.190457] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.191083] kasan_report+0xbe/0xf0 [ 43.191568] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.192196] vma_interval_tree_remove+0xc75/0xec0 [ 43.192798] vma_prepare+0xc54/0x11a0 [ 43.193276] __split_vma+0x5af/0x950 [ 43.193766] ? __pfx___split_vma+0x10/0x10 [ 43.194295] ? find_held_lock+0x2c/0x110 [ 43.194809] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.195368] ? lock_is_held_type+0x9f/0x120 [ 43.195912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.196517] ? mtree_range_walk+0x632/0x900 [ 43.197068] ? mas_walk+0x5c7/0x7c0 [ 43.197549] do_vmi_munmap+0x1f1/0x2b0 [ 43.198042] mmap_region+0x1f9/0x2660 [ 43.198519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.199039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.199758] ? __pfx_lock_acquire+0x10/0x10 [ 43.200291] ? __pfx_mmap_region+0x10/0x10 [ 43.200819] ? security_mmap_addr+0x7d/0xa0 [ 43.201356] ? get_unmapped_area+0x1f5/0x3f0 [ 43.201923] do_mmap+0x854/0xf00 [ 43.202366] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.202860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.203422] ksys_mmap_pgoff+0x3af/0x500 [ 43.203932] do_syscall_64+0x3f/0x90 [ 43.204406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.205079] RIP: 0033:0x7fe2a4fc3d82 [ 43.205546] 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 [ 43.207769] RSP: 002b:00007ffee438ebc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.208719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2a4fc3d82 [ 43.209609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2a43fd000 [ 43.210500] RBP: 00007fe2a43fd000 R08: 0000000000000009 R09: 0000000000001000 [ 43.211392] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffda604ec0 [ 43.212290] R13: 00007ffee438ebe0 R14: 00007ffee438ec10 R15: 00007ffee438ef70 [ 43.213193] [ 43.213498] [ 43.213722] Allocated by task 213: [ 43.214168] kasan_save_stack+0x22/0x50 [ 43.214688] kasan_set_track+0x25/0x30 [ 43.215200] __kasan_slab_alloc+0x59/0x70 [ 43.215742] kmem_cache_alloc+0x16b/0x370 [ 43.216271] vm_area_dup+0x20/0x160 [ 43.216747] __split_vma+0x170/0x950 [ 43.217235] split_vma+0xc6/0x110 [ 43.217699] mprotect_fixup+0x8d2/0xb30 [ 43.218206] do_mprotect_pkey+0x87e/0xd40 [ 43.218730] __x64_sys_mprotect+0x78/0xc0 [ 43.219257] do_syscall_64+0x3f/0x90 [ 43.219733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.220371] [ 43.220584] Freed by task 213: [ 43.220980] kasan_save_stack+0x22/0x50 [ 43.221493] kasan_set_track+0x25/0x30 [ 43.221989] kasan_save_free_info+0x2b/0x50 [ 43.222526] __kasan_slab_free+0x10a/0x190 [ 43.223056] kmem_cache_free+0x10d/0x4d0 [ 43.223565] rcu_core+0x8c8/0x2860 [ 43.224012] __do_softirq+0x1b7/0x7d4 [ 43.224496] [ 43.224717] Last potentially related work creation: [ 43.225304] kasan_save_stack+0x22/0x50 [ 43.225827] __kasan_record_aux_stack+0x8e/0xa0 [ 43.226400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.227037] remove_vma+0x139/0x170 [ 43.227498] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.228064] do_vmi_munmap+0x1f1/0x2b0 [ 43.228551] __vm_munmap+0x138/0x3a0 [ 43.229020] __x64_sys_munmap+0x59/0x80 [ 43.229534] do_syscall_64+0x3f/0x90 [ 43.230003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.230659] [ 43.230872] The buggy address belongs to the object at ffff88800f072828 [ 43.230872] which belongs to the cache vm_area_struct of size 168 [ 43.232335] The buggy address is located 88 bytes inside of [ 43.232335] freed 168-byte region [ffff88800f072828, ffff88800f0728d0) [ 43.233747] [ 43.233960] The buggy address belongs to the physical page: [ 43.234615] page:000000000b9d5836 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf072 [ 43.235700] memcg:ffff88800ec6c801 [ 43.236123] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.236817] page_type: 0xffffffff() [ 43.237265] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.238187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec6c801 [ 43.239109] page dumped because: kasan: bad access detected [ 43.239776] [ 43.239995] Memory state around the buggy address: [ 43.240572] ffff88800f072780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.241425] ffff88800f072800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.242300] >ffff88800f072880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.243148] ^ [ 43.243560] ffff88800f072900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.244413] ffff88800f072980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 43.245258] ================================================================== [ 43.246238] Disabling lock debugging due to kernel taint [ 45.775547] BUG: Bad rss-counter state mm:0000000034f5b0a4 type:MM_FILEPAGES val:33 [ 45.776808] BUG: Bad rss-counter state mm:0000000034f5b0a4 type:MM_ANONPAGES val:22 [ 46.230788] BUG: Bad rss-counter state mm:000000004406f624 type:MM_FILEPAGES val:33 [ 46.231908] BUG: Bad rss-counter state mm:000000004406f624 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55659' (ECDSA) to the list of known hosts. 2023/06/19 19:10:34 fuzzer started 2023/06/19 19:10:35 dialing manager at localhost:44161 2023/06/19 19:10:35 checking machine... 2023/06/19 19:10:35 checking revisions... [ 46.888848] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:10:35 testing simple program... [ 46.942246] cgroup: Unknown subsys name 'net' [ 46.995325] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:10:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880183430b8 RCX=ffffffff812e00e5 RDX=1ffffffff0adb046 RSI=0000000000000004 RDI=ffff88806ce09d78 RBP=1ffff1100d9c13ab RSP=ffff88806ce09dc0 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=ffff888016a23680 R13=ffffffff856d8230 R14=0000000000000000 R15=ffff8880183430b8 RIP=ffffffff812e0186 RFL=00000086 [--S--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 00007ffb8d50f900 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=00007ffb8dac4650 CR3=000000000e87c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 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=00007ffda3922468 CR3=0000000005482000 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=00007f84f15f9510000055fae2fa6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000