syzkaller login: [ 31.423834] BUG: Bad rss-counter state mm:00000000955676ff type:MM_FILEPAGES val:33 [ 31.425517] BUG: Bad rss-counter state mm:00000000955676ff type:MM_ANONPAGES val:22 [ 31.595688] ================================================================== [ 31.596610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.597582] Read of size 8 at addr ffff88801a2ca880 by task sshd/220 [ 31.598408] [ 31.598646] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.599525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.600522] Call Trace: [ 31.600868] <TASK> [ 31.601156] dump_stack_lvl+0x91/0xf0 [ 31.601677] print_report+0xcc/0x620 [ 31.602165] ? __virt_addr_valid+0x102/0x340 [ 31.602714] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.603339] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.603965] kasan_report+0xbe/0xf0 [ 31.604450] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.605082] vma_interval_tree_remove+0xc75/0xec0 [ 31.605698] vma_prepare+0xc54/0x11a0 [ 31.606196] __split_vma+0x5af/0x950 [ 31.606682] ? __pfx___split_vma+0x10/0x10 [ 31.607213] ? find_held_lock+0x2c/0x110 [ 31.607737] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.608303] ? lock_is_held_type+0x9f/0x120 [ 31.608844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.609466] ? mtree_range_walk+0x632/0x900 [ 31.610019] ? mas_walk+0x5c7/0x7c0 [ 31.610492] do_vmi_munmap+0x1f1/0x2b0 [ 31.610995] mmap_region+0x1f9/0x2660 [ 31.611478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.611998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.612729] ? __pfx_lock_acquire+0x10/0x10 [ 31.613284] ? __pfx_mmap_region+0x10/0x10 [ 31.613823] ? security_mmap_addr+0x7d/0xa0 [ 31.614356] ? get_unmapped_area+0x1f5/0x3f0 [ 31.614901] do_mmap+0x854/0xf00 [ 31.615341] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.615841] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.616404] ksys_mmap_pgoff+0x3af/0x500 [ 31.616923] do_syscall_64+0x3f/0x90 [ 31.617409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.618059] RIP: 0033:0x7fe36d032d82 [ 31.618525] 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 [ 31.620666] RSP: 002b:00007ffc63134908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.621615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe36d032d82 [ 31.622471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe36c46c000 [ 31.623319] RBP: 00007fe36c46c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.624170] R10: 0000000000000812 R11: 0000000000000206 R12: 000056384c5adf70 [ 31.625016] R13: 00007ffc63134920 R14: 00007ffc63134950 R15: 00007ffc63134cb0 [ 31.625882] </TASK> [ 31.626171] [ 31.626389] Allocated by task 213: [ 31.626815] kasan_save_stack+0x22/0x50 [ 31.627314] kasan_set_track+0x25/0x30 [ 31.627810] __kasan_slab_alloc+0x59/0x70 [ 31.628334] kmem_cache_alloc+0x16b/0x370 [ 31.628852] vm_area_dup+0x20/0x160 [ 31.629316] __split_vma+0x170/0x950 [ 31.629787] split_vma+0xc6/0x110 [ 31.630235] mprotect_fixup+0x8d2/0xb30 [ 31.630744] do_mprotect_pkey+0x87e/0xd40 [ 31.631267] __x64_sys_mprotect+0x78/0xc0 [ 31.631788] do_syscall_64+0x3f/0x90 [ 31.632260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.632905] [ 31.633119] Freed by task 210: [ 31.633526] kasan_save_stack+0x22/0x50 [ 31.634028] kasan_set_track+0x25/0x30 [ 31.634520] kasan_save_free_info+0x2b/0x50 [ 31.635050] __kasan_slab_free+0x10a/0x190 [ 31.635580] kmem_cache_free+0x10d/0x4d0 [ 31.636090] rcu_core+0x8c8/0x2860 [ 31.636533] __do_softirq+0x1b7/0x7d4 [ 31.637014] [ 31.637238] Last potentially related work creation: [ 31.637832] kasan_save_stack+0x22/0x50 [ 31.638337] __kasan_record_aux_stack+0x8e/0xa0 [ 31.638909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.639552] remove_vma+0x139/0x170 [ 31.640007] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.640561] do_vmi_munmap+0x1f1/0x2b0 [ 31.641049] __vm_munmap+0x138/0x3a0 [ 31.641533] __x64_sys_munmap+0x59/0x80 [ 31.642031] do_syscall_64+0x3f/0x90 [ 31.642504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.643148] [ 31.643368] The buggy address belongs to the object at ffff88801a2ca828 [ 31.643368] which belongs to the cache vm_area_struct of size 168 [ 31.644840] The buggy address is located 88 bytes inside of [ 31.644840] freed 168-byte region [ffff88801a2ca828, ffff88801a2ca8d0) [ 31.646256] [ 31.646478] The buggy address belongs to the physical page: [ 31.647149] page:00000000f225139d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2ca [ 31.648241] memcg:ffff88801a2cb001 [ 31.648670] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.649328] page_type: 0xffffffff() [ 31.649781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.650701] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2cb001 [ 31.651605] page dumped because: kasan: bad access detected [ 31.652263] [ 31.652483] Memory state around the buggy address: [ 31.653069] ffff88801a2ca780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.653944] ffff88801a2ca800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.654802] >ffff88801a2ca880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.655650] ^ [ 31.656058] ffff88801a2ca900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.656912] ffff88801a2ca980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.657773] ================================================================== [ 31.658899] Disabling lock debugging due to kernel taint [ 33.665920] BUG: Bad rss-counter state mm:000000000ba50651 type:MM_FILEPAGES val:33 [ 33.666916] BUG: Bad rss-counter state mm:000000000ba50651 type:MM_ANONPAGES val:22 [ 34.219243] BUG: Bad rss-counter state mm:00000000066d286a type:MM_FILEPAGES val:33 [ 34.220396] BUG: Bad rss-counter state mm:00000000066d286a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21084' (ECDSA) to the list of known hosts. 2023/06/20 13:30:29 fuzzer started 2023/06/20 13:30:29 dialing manager at localhost:36067 2023/06/20 13:30:29 checking machine... 2023/06/20 13:30:29 checking revisions... [ 34.882679] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:30:29 testing simple program... [ 34.930256] cgroup: Unknown subsys name 'net' [ 34.981186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:29 Registers: info registers vcpu 0 RAX=0000559861f25eb6 RBX=00007ffd3859fd00 RCX=0000000000000005 RDX=0000000000000001 RSI=0000000000000001 RDI=0000559861f25eb0 RBP=000000000000000b RSP=00007ffd3859fcd0 R8 =0000559861f528bf R9 =00007f580e080be0 R10=0000000000000100 R11=0000000000000246 R12=0000559861f25eb0 R13=00007ffd3859fcf8 R14=00007f580daa9b22 R15=00007f580dace710 RIP=00007f580df51449 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f580dace900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd3859a000 CR3=000000001686e000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=ffffffffffffff00ffff000000000000 XMM03=00000000000032323009094b53414d55 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000000000000000ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007f623e415ac0 CR3=000000000fe1c000 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=2039323a30333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000