syzkaller login: [ 31.278344] BUG: Bad rss-counter state mm:00000000f067d6c2 type:MM_FILEPAGES val:33 [ 31.279534] BUG: Bad rss-counter state mm:00000000f067d6c2 type:MM_ANONPAGES val:22 [ 31.319795] ================================================================== [ 31.320832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.321776] Read of size 8 at addr ffff8880145e9228 by task sshd/220 [ 31.322563] [ 31.322789] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.323656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.324654] Call Trace: [ 31.324975] [ 31.325269] dump_stack_lvl+0x91/0xf0 [ 31.325761] print_report+0xcc/0x620 [ 31.326244] ? __virt_addr_valid+0x102/0x340 [ 31.326799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327423] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328041] kasan_report+0xbe/0xf0 [ 31.328531] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329160] vma_interval_tree_remove+0xc75/0xec0 [ 31.329777] vma_prepare+0xc54/0x11a0 [ 31.330254] __split_vma+0x5af/0x950 [ 31.330730] ? __pfx___split_vma+0x10/0x10 [ 31.331264] ? find_held_lock+0x2c/0x110 [ 31.331782] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.332373] ? lock_is_held_type+0x9f/0x120 [ 31.332927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.333537] ? mtree_range_walk+0x632/0x900 [ 31.334101] ? mas_walk+0x5c7/0x7c0 [ 31.334585] do_vmi_munmap+0x1f1/0x2b0 [ 31.335090] mmap_region+0x1f9/0x2660 [ 31.335581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.336097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.336824] ? __pfx_lock_acquire+0x10/0x10 [ 31.337362] ? __pfx_mmap_region+0x10/0x10 [ 31.337900] ? security_mmap_addr+0x7d/0xa0 [ 31.338434] ? get_unmapped_area+0x1f5/0x3f0 [ 31.338992] do_mmap+0x854/0xf00 [ 31.339436] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.339937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.340529] ksys_mmap_pgoff+0x3af/0x500 [ 31.341051] do_syscall_64+0x3f/0x90 [ 31.341537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342192] RIP: 0033:0x7f84e7bbed82 [ 31.342658] 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 [ 31.344895] RSP: 002b:00007ffd5d53f468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.345846] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84e7bbed82 [ 31.346713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84e6ff8000 [ 31.347605] RBP: 00007f84e6ff8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.348467] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558936e8b20 [ 31.349336] R13: 00007ffd5d53f480 R14: 00007ffd5d53f4b0 R15: 00007ffd5d53f810 [ 31.350200] [ 31.350496] [ 31.350717] Allocated by task 213: [ 31.351156] kasan_save_stack+0x22/0x50 [ 31.351679] kasan_set_track+0x25/0x30 [ 31.352197] __kasan_slab_alloc+0x59/0x70 [ 31.352731] kmem_cache_alloc+0x16b/0x370 [ 31.353244] vm_area_dup+0x20/0x160 [ 31.353705] __split_vma+0x170/0x950 [ 31.354176] split_vma+0xc6/0x110 [ 31.354618] mprotect_fixup+0x8d2/0xb30 [ 31.355133] do_mprotect_pkey+0x87e/0xd40 [ 31.355653] __x64_sys_mprotect+0x78/0xc0 [ 31.356174] do_syscall_64+0x3f/0x90 [ 31.356660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357299] [ 31.357512] Freed by task 13: [ 31.357903] kasan_save_stack+0x22/0x50 [ 31.358403] kasan_set_track+0x25/0x30 [ 31.358903] kasan_save_free_info+0x2b/0x50 [ 31.359436] __kasan_slab_free+0x10a/0x190 [ 31.359975] kmem_cache_free+0x10d/0x4d0 [ 31.360503] rcu_core+0x8c8/0x2860 [ 31.360948] __do_softirq+0x1b7/0x7d4 [ 31.361434] [ 31.361653] Last potentially related work creation: [ 31.362244] kasan_save_stack+0x22/0x50 [ 31.362757] __kasan_record_aux_stack+0x8e/0xa0 [ 31.363337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.363990] remove_vma+0x139/0x170 [ 31.364468] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.365038] do_vmi_munmap+0x1f1/0x2b0 [ 31.365536] __vm_munmap+0x138/0x3a0 [ 31.366002] __x64_sys_munmap+0x59/0x80 [ 31.366518] do_syscall_64+0x3f/0x90 [ 31.367014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367669] [ 31.367889] The buggy address belongs to the object at ffff8880145e91d0 [ 31.367889] which belongs to the cache vm_area_struct of size 168 [ 31.369394] The buggy address is located 88 bytes inside of [ 31.369394] freed 168-byte region [ffff8880145e91d0, ffff8880145e9278) [ 31.370855] [ 31.371080] The buggy address belongs to the physical page: [ 31.371782] page:00000000a25ef11f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145e9 [ 31.372919] memcg:ffff88801452cc01 [ 31.373354] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.374036] page_type: 0xffffffff() [ 31.374509] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.375468] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801452cc01 [ 31.376432] page dumped because: kasan: bad access detected [ 31.377120] [ 31.377350] Memory state around the buggy address: [ 31.377957] ffff8880145e9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.378841] ffff8880145e9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.379744] >ffff8880145e9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.380630] ^ [ 31.381196] ffff8880145e9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.382048] ffff8880145e9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.382928] ================================================================== [ 31.384213] Disabling lock debugging due to kernel taint [ 33.256311] BUG: Bad rss-counter state mm:00000000ec11f18c type:MM_FILEPAGES val:33 [ 33.257545] BUG: Bad rss-counter state mm:00000000ec11f18c type:MM_ANONPAGES val:22 [ 33.796978] BUG: Bad rss-counter state mm:00000000cb420851 type:MM_FILEPAGES val:33 [ 33.798117] BUG: Bad rss-counter state mm:00000000cb420851 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33462' (ECDSA) to the list of known hosts. 2023/06/21 03:29:13 fuzzer started 2023/06/21 03:29:13 dialing manager at localhost:36067 2023/06/21 03:29:13 checking machine... 2023/06/21 03:29:13 checking revisions... [ 34.464363] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:29:13 testing simple program... [ 34.506609] cgroup: Unknown subsys name 'net' [ 34.563111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c137e RSI=ffffffff81809add RDI=ffff88806ce09b6c RBP=ffff88806ce09bf0 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880171f51c0 R15=ffff888017109080 RIP=ffffffff813ad547 RFL=00000246 [---Z-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 00007f4c6f61d900 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=00007ffe01919000 CR3=000000000e5b0000 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=563412feff00545000000000000080fe 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 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=00007f0a16ee8c70 CR3=00000000170be000 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=2032313a39323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39323a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000