syzkaller login: [ 38.813870] BUG: Bad rss-counter state mm:00000000e1e9db40 type:MM_FILEPAGES val:33 [ 38.814602] BUG: Bad rss-counter state mm:00000000e1e9db40 type:MM_ANONPAGES val:22 [ 39.061471] ================================================================== [ 39.062069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.062666] Read of size 8 at addr ffff88800ed4b968 by task sshd/223 [ 39.063173] [ 39.078966] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.079524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.080143] Call Trace: [ 39.080353] [ 39.080538] dump_stack_lvl+0x91/0xf0 [ 39.080864] print_report+0xcc/0x620 [ 39.081182] ? __virt_addr_valid+0x102/0x340 [ 39.081537] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.081933] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.082326] kasan_report+0xbe/0xf0 [ 39.082634] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.083059] vma_interval_tree_remove+0xc75/0xec0 [ 39.083455] vma_prepare+0xc54/0x11a0 [ 39.083772] __split_vma+0x5af/0x950 [ 39.084087] ? __pfx___split_vma+0x10/0x10 [ 39.084436] ? find_held_lock+0x2c/0x110 [ 39.084781] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.085148] ? lock_is_held_type+0x9f/0x120 [ 39.085504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.085902] ? mtree_range_walk+0x632/0x900 [ 39.086268] ? mas_walk+0x5c7/0x7c0 [ 39.086584] do_vmi_munmap+0x1f1/0x2b0 [ 39.086941] mmap_region+0x1f9/0x2660 [ 39.087258] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.087583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.088034] ? __pfx_lock_acquire+0x10/0x10 [ 39.088371] ? __pfx_mmap_region+0x10/0x10 [ 39.088710] ? security_mmap_addr+0x7d/0xa0 [ 39.089052] ? get_unmapped_area+0x1f5/0x3f0 [ 39.089402] do_mmap+0x854/0xf00 [ 39.089685] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.090004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.090364] ksys_mmap_pgoff+0x3af/0x500 [ 39.090689] do_syscall_64+0x3f/0x90 [ 39.091033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.091450] RIP: 0033:0x7feb1b2acd82 [ 39.091732] 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 [ 39.093052] RSP: 002b:00007ffe970f9c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.093634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb1b2acd82 [ 39.094182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb1a6e6000 [ 39.094726] RBP: 00007feb1a6e6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.095308] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580acca5ec0 [ 39.095856] R13: 00007ffe970f9c30 R14: 00007ffe970f9c60 R15: 00007ffe970f9fc0 [ 39.096407] [ 39.096594] [ 39.096733] Allocated by task 214: [ 39.097012] kasan_save_stack+0x22/0x50 [ 39.097340] kasan_set_track+0x25/0x30 [ 39.097660] __kasan_slab_alloc+0x59/0x70 [ 39.097998] kmem_cache_alloc+0x16b/0x370 [ 39.098330] vm_area_dup+0x20/0x160 [ 39.098624] __split_vma+0x170/0x950 [ 39.098955] split_vma+0xc6/0x110 [ 39.099240] mprotect_fixup+0x8d2/0xb30 [ 39.099563] do_mprotect_pkey+0x87e/0xd40 [ 39.099895] __x64_sys_mprotect+0x78/0xc0 [ 39.100227] do_syscall_64+0x3f/0x90 [ 39.100531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.100940] [ 39.101078] Freed by task 88: [ 39.101322] kasan_save_stack+0x22/0x50 [ 39.101646] kasan_set_track+0x25/0x30 [ 39.101962] kasan_save_free_info+0x2b/0x50 [ 39.102304] __kasan_slab_free+0x10a/0x190 [ 39.102645] kmem_cache_free+0x10d/0x4d0 [ 39.103015] rcu_core+0x8c8/0x2860 [ 39.103302] __do_softirq+0x1b7/0x7d4 [ 39.103606] [ 39.103744] Last potentially related work creation: [ 39.104119] kasan_save_stack+0x22/0x50 [ 39.104449] __kasan_record_aux_stack+0x8e/0xa0 [ 39.104826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.105249] remove_vma+0x139/0x170 [ 39.105546] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.105910] do_vmi_munmap+0x1f1/0x2b0 [ 39.106230] __vm_munmap+0x138/0x3a0 [ 39.106538] __x64_sys_munmap+0x59/0x80 [ 39.106869] do_syscall_64+0x3f/0x90 [ 39.107192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.107604] [ 39.107742] The buggy address belongs to the object at ffff88800ed4b910 [ 39.107742] which belongs to the cache vm_area_struct of size 168 [ 39.108668] The buggy address is located 88 bytes inside of [ 39.108668] freed 168-byte region [ffff88800ed4b910, ffff88800ed4b9b8) [ 39.109555] [ 39.109699] The buggy address belongs to the physical page: [ 39.110126] page:000000002b5b4e7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed4b [ 39.110824] memcg:ffff88800ee2df01 [ 39.111133] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.111555] page_type: 0xffffffff() [ 39.111851] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.112444] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee2df01 [ 39.113025] page dumped because: kasan: bad access detected [ 39.113451] [ 39.113595] Memory state around the buggy address: [ 39.113976] ffff88800ed4b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.114526] ffff88800ed4b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.119155] >ffff88800ed4b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.119706] ^ [ 39.120210] ffff88800ed4b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.120762] ffff88800ed4ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.121309] ================================================================== [ 39.122100] Disabling lock debugging due to kernel taint [ 41.468222] BUG: Bad rss-counter state mm:0000000049e36dc8 type:MM_FILEPAGES val:33 [ 41.468890] BUG: Bad rss-counter state mm:0000000049e36dc8 type:MM_ANONPAGES val:22 [ 42.698095] BUG: Bad rss-counter state mm:00000000c020bf80 type:MM_FILEPAGES val:33 [ 42.698759] BUG: Bad rss-counter state mm:00000000c020bf80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53555' (ECDSA) to the list of known hosts. 2023/06/21 08:07:48 fuzzer started 2023/06/21 08:07:48 dialing manager at localhost:36067 2023/06/21 08:07:48 checking machine... 2023/06/21 08:07:48 checking revisions... [ 43.550572] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:07:48 testing simple program... [ 43.612467] cgroup: Unknown subsys name 'net' [ 43.734211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:07:48 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=00007fc2185e4328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7c92 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff888010073680 RSI=ffffffff813bff99 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88806cf09e40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000005 R11=ffff88806cf09ff8 R12=0000000000000046 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0864 RFL=00000082 [--S----] 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 =0000 0000000000000000 00000000 00000000 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=00007f2901efb778 CR3=000000000ef28000 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=78756e696c657362696c2f756e672d78 XMM02=00312e6f732e78756e696c657362696c XMM03=2f756e672d78756e696c2d34365f3638 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000