[ 30.650100] BUG: Bad rss-counter state mm:00000000047df603 type:MM_FILEPAGES val:33 [ 30.651508] BUG: Bad rss-counter state mm:00000000047df603 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.797373] ================================================================== [ 30.798322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.799214] Read of size 8 at addr ffff88800e835798 by task sshd/220 [ 30.800059] [ 30.800272] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.801111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.802054] Call Trace: [ 30.802365] [ 30.802643] dump_stack_lvl+0x91/0xf0 [ 30.803119] print_report+0xcc/0x620 [ 30.803584] ? __virt_addr_valid+0x102/0x340 [ 30.804115] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804720] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805300] kasan_report+0xbe/0xf0 [ 30.805761] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.806345] vma_interval_tree_remove+0xc75/0xec0 [ 30.806936] vma_prepare+0xc54/0x11a0 [ 30.807413] __split_vma+0x5af/0x950 [ 30.807865] ? __pfx___split_vma+0x10/0x10 [ 30.808381] ? find_held_lock+0x2c/0x110 [ 30.808911] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.809462] ? lock_is_held_type+0x9f/0x120 [ 30.809995] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.810601] ? mtree_range_walk+0x632/0x900 [ 30.811144] ? mas_walk+0x5c7/0x7c0 [ 30.811616] do_vmi_munmap+0x1f1/0x2b0 [ 30.812097] mmap_region+0x1f9/0x2660 [ 30.812586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.813091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.813807] ? __pfx_lock_acquire+0x10/0x10 [ 30.814334] ? __pfx_mmap_region+0x10/0x10 [ 30.814853] ? security_mmap_addr+0x7d/0xa0 [ 30.815375] ? get_unmapped_area+0x1f5/0x3f0 [ 30.815911] do_mmap+0x854/0xf00 [ 30.816347] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.816848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.817392] ksys_mmap_pgoff+0x3af/0x500 [ 30.817887] do_syscall_64+0x3f/0x90 [ 30.818366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819011] RIP: 0033:0x7f673e8cdd82 [ 30.819467] 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 [ 30.821632] RSP: 002b:00007ffd40fa0f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.822551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f673e8cdd82 [ 30.823408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f673dd07000 [ 30.824271] RBP: 00007f673dd07000 R08: 0000000000000009 R09: 0000000000001000 [ 30.825165] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb74026ec0 [ 30.826015] R13: 00007ffd40fa0f70 R14: 00007ffd40fa0fa0 R15: 00007ffd40fa1300 [ 30.826904] [ 30.827199] [ 30.827415] Allocated by task 213: [ 30.827844] kasan_save_stack+0x22/0x50 [ 30.828362] kasan_set_track+0x25/0x30 [ 30.828888] __kasan_slab_alloc+0x59/0x70 [ 30.829420] kmem_cache_alloc+0x16b/0x370 [ 30.829940] vm_area_dup+0x20/0x160 [ 30.830399] __split_vma+0x170/0x950 [ 30.830868] split_vma+0xc6/0x110 [ 30.831313] mprotect_fixup+0x8d2/0xb30 [ 30.831824] do_mprotect_pkey+0x87e/0xd40 [ 30.832343] __x64_sys_mprotect+0x78/0xc0 [ 30.832880] do_syscall_64+0x3f/0x90 [ 30.833360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834009] [ 30.834230] Freed by task 204: [ 30.834624] kasan_save_stack+0x22/0x50 [ 30.835126] kasan_set_track+0x25/0x30 [ 30.835619] kasan_save_free_info+0x2b/0x50 [ 30.836157] __kasan_slab_free+0x10a/0x190 [ 30.836714] kmem_cache_free+0x10d/0x4d0 [ 30.837221] rcu_core+0x8c8/0x2860 [ 30.837683] __do_softirq+0x1b7/0x7d4 [ 30.838165] [ 30.838383] Last potentially related work creation: [ 30.838965] kasan_save_stack+0x22/0x50 [ 30.839470] __kasan_record_aux_stack+0x8e/0xa0 [ 30.840048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.840720] remove_vma+0x139/0x170 [ 30.841171] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.841726] do_vmi_munmap+0x1f1/0x2b0 [ 30.842214] __vm_munmap+0x138/0x3a0 [ 30.842686] __x64_sys_munmap+0x59/0x80 [ 30.843198] do_syscall_64+0x3f/0x90 [ 30.843678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.844333] [ 30.844551] Second to last potentially related work creation: [ 30.845229] kasan_save_stack+0x22/0x50 [ 30.845732] __kasan_record_aux_stack+0x8e/0xa0 [ 30.846302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.846947] remove_vma+0x139/0x170 [ 30.847400] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.847959] do_vmi_munmap+0x1f1/0x2b0 [ 30.848476] mmap_region+0x1f9/0x2660 [ 30.848962] do_mmap+0x854/0xf00 [ 30.849397] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849890] ksys_mmap_pgoff+0x3af/0x500 [ 30.850393] do_syscall_64+0x3f/0x90 [ 30.850870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851522] [ 30.851742] The buggy address belongs to the object at ffff88800e835740 [ 30.851742] which belongs to the cache vm_area_struct of size 168 [ 30.853220] The buggy address is located 88 bytes inside of [ 30.853220] freed 168-byte region [ffff88800e835740, ffff88800e8357e8) [ 30.854628] [ 30.854846] The buggy address belongs to the physical page: [ 30.855514] page:000000008061c0ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe835 [ 30.856639] memcg:ffff88800cd85401 [ 30.857077] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.857735] page_type: 0xffffffff() [ 30.858187] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.859116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd85401 [ 30.860043] page dumped because: kasan: bad access detected [ 30.860717] [ 30.860936] Memory state around the buggy address: [ 30.861558] ffff88800e835680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.862423] ffff88800e835700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.863301] >ffff88800e835780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.864164] ^ [ 30.864674] ffff88800e835800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.865517] ffff88800e835880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.866364] ================================================================== [ 30.867664] Disabling lock debugging due to kernel taint [ 32.804548] BUG: Bad rss-counter state mm:0000000030c50762 type:MM_FILEPAGES val:33 [ 32.805707] BUG: Bad rss-counter state mm:0000000030c50762 type:MM_ANONPAGES val:22 [ 33.166940] BUG: Bad rss-counter state mm:0000000015d8696f type:MM_FILEPAGES val:33 [ 33.168089] BUG: Bad rss-counter state mm:0000000015d8696f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5340' (ECDSA) to the list of known hosts. 2023/06/21 02:24:26 fuzzer started 2023/06/21 02:24:26 dialing manager at localhost:36067 2023/06/21 02:24:26 checking machine... 2023/06/21 02:24:26 checking revisions... [ 33.868171] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:24:26 testing simple program... [ 33.939159] cgroup: Unknown subsys name 'net' [ 34.040195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:26 Registers: info registers vcpu 0 RAX=ffff888018208001 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=ffff888018207b01 RSI=ffff888018207bb8 RDI=ffff88806ce09a60 RBP=ffff888018207bb8 RSP=ffff88806ce099a8 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000091bc9 R12=0000000000000008 R13=ffff888018200000 R14=ffff888018207bb8 R15=ffff88806ce09a50 RIP=ffffffff811304c9 RFL=00000202 [-------] 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 00007f0a1979a900 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=00007ffcd709c000 CR3=000000000b39e000 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=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=00007f68de223008 CR3=000000000c984000 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=68fe3cd0d8c462a30946a349648594db XMM02=ec2efd57dc4c00df000000000011afb0 XMM03=480d5dcc4e9de945000000000011b080 XMM04=41507a6bb7ce127400000000000ae988 XMM05=299089e47e8c7e3900000000001339e8 XMM06=4fda316b135da52b0000000000132718 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=480d5dcc4e9de945000000000011b080 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000