[ 23.994951] BUG: Bad rss-counter state mm:00000000f5d632f1 type:MM_FILEPAGES val:33 [ 23.995977] BUG: Bad rss-counter state mm:00000000f5d632f1 type:MM_ANONPAGES val:22 [ 24.158232] ================================================================== [ 24.159155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.160099] Read of size 8 at addr ffff88800daafd08 by task sshd/219 [ 24.160875] [ 24.161098] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.162098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.163089] Call Trace: [ 24.163413] <TASK> [ 24.163719] dump_stack_lvl+0x91/0xf0 [ 24.164212] print_report+0xcc/0x620 [ 24.164703] ? __virt_addr_valid+0x102/0x340 [ 24.165269] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.165895] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.166520] kasan_report+0xbe/0xf0 [ 24.166996] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.167619] vma_interval_tree_remove+0xc75/0xec0 [ 24.168227] vma_prepare+0xc54/0x11a0 [ 24.168712] __split_vma+0x5af/0x950 [ 24.169198] ? __pfx___split_vma+0x10/0x10 [ 24.169733] ? find_held_lock+0x2c/0x110 [ 24.170257] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.170826] ? lock_is_held_type+0x9f/0x120 [ 24.171374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.171992] ? mtree_range_walk+0x632/0x900 [ 24.172551] ? mas_walk+0x5c7/0x7c0 [ 24.173034] do_vmi_munmap+0x1f1/0x2b0 [ 24.173554] mmap_region+0x1f9/0x2660 [ 24.174040] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.174560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.175283] ? __pfx_lock_acquire+0x10/0x10 [ 24.175825] ? __pfx_mmap_region+0x10/0x10 [ 24.176360] ? security_mmap_addr+0x7d/0xa0 [ 24.176895] ? get_unmapped_area+0x1f5/0x3f0 [ 24.177466] do_mmap+0x854/0xf00 [ 24.177908] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.178406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.178970] ksys_mmap_pgoff+0x3af/0x500 [ 24.179482] do_syscall_64+0x3f/0x90 [ 24.179963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.180619] RIP: 0033:0x7f2ef06b5d82 [ 24.181085] 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 [ 24.183247] RSP: 002b:00007ffc8ddaa498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.184159] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ef06b5d82 [ 24.185027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2eefaef000 [ 24.185887] RBP: 00007f2eefaef000 R08: 0000000000000009 R09: 0000000000001000 [ 24.186736] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642d81d5ec0 [ 24.187587] R13: 00007ffc8ddaa4b0 R14: 00007ffc8ddaa4e0 R15: 00007ffc8ddaa840 [ 24.188455] </TASK> [ 24.188750] [ 24.188966] Allocated by task 210: [ 24.189402] kasan_save_stack+0x22/0x50 [ 24.189913] kasan_set_track+0x25/0x30 [ 24.190413] __kasan_slab_alloc+0x59/0x70 [ 24.190941] kmem_cache_alloc+0x16b/0x370 [ 24.191464] vm_area_dup+0x20/0x160 [ 24.191922] __split_vma+0x170/0x950 [ 24.192396] split_vma+0xc6/0x110 [ 24.192840] mprotect_fixup+0x8d2/0xb30 [ 24.193366] do_mprotect_pkey+0x87e/0xd40 [ 24.193889] __x64_sys_mprotect+0x78/0xc0 [ 24.194415] do_syscall_64+0x3f/0x90 [ 24.194894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.195536] [ 24.195751] Freed by task 203: [ 24.196152] kasan_save_stack+0x22/0x50 [ 24.196659] kasan_set_track+0x25/0x30 [ 24.197159] kasan_save_free_info+0x2b/0x50 [ 24.197696] __kasan_slab_free+0x10a/0x190 [ 24.198229] kmem_cache_free+0x10d/0x4d0 [ 24.198738] rcu_core+0x8c8/0x2860 [ 24.199188] __do_softirq+0x1b7/0x7d4 [ 24.199666] [ 24.199883] Last potentially related work creation: [ 24.200475] kasan_save_stack+0x22/0x50 [ 24.200980] __kasan_record_aux_stack+0x8e/0xa0 [ 24.201576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.202218] remove_vma+0x139/0x170 [ 24.202679] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.203240] do_vmi_munmap+0x1f1/0x2b0 [ 24.203730] __vm_munmap+0x138/0x3a0 [ 24.204199] __x64_sys_munmap+0x59/0x80 [ 24.204705] do_syscall_64+0x3f/0x90 [ 24.205196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.205844] [ 24.206062] Second to last potentially related work creation: [ 24.206743] kasan_save_stack+0x22/0x50 [ 24.207248] __kasan_record_aux_stack+0x8e/0xa0 [ 24.207825] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.208471] remove_vma+0x139/0x170 [ 24.208920] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.209482] do_vmi_munmap+0x1f1/0x2b0 [ 24.209978] mmap_region+0x1f9/0x2660 [ 24.210463] do_mmap+0x854/0xf00 [ 24.210901] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.211388] ksys_mmap_pgoff+0x3af/0x500 [ 24.211892] do_syscall_64+0x3f/0x90 [ 24.212374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.213025] [ 24.213255] The buggy address belongs to the object at ffff88800daafcb0 [ 24.213255] which belongs to the cache vm_area_struct of size 168 [ 24.214756] The buggy address is located 88 bytes inside of [ 24.214756] freed 168-byte region [ffff88800daafcb0, ffff88800daafd58) [ 24.216176] [ 24.216395] The buggy address belongs to the physical page: [ 24.217048] page:000000007a95830e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaaf [ 24.218150] memcg:ffff88800d26b001 [ 24.218584] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.219292] page_type: 0xffffffff() [ 24.219745] raw: 0100000000000200 ffff8880087a0c80 ffffea000036bec0 dead000000000005 [ 24.220671] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d26b001 [ 24.221596] page dumped because: kasan: bad access detected [ 24.222268] [ 24.222490] Memory state around the buggy address: [ 24.223081] ffff88800daafc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.223948] ffff88800daafc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.224817] >ffff88800daafd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.225683] ^ [ 24.226120] ffff88800daafd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.226991] ffff88800daafe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.227851] ================================================================== [ 24.228924] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.503909] BUG: Bad rss-counter state mm:0000000011f37606 type:MM_FILEPAGES val:33 [ 26.504961] BUG: Bad rss-counter state mm:0000000011f37606 type:MM_ANONPAGES val:22 [ 26.897515] BUG: Bad rss-counter state mm:0000000023d3ae0c type:MM_FILEPAGES val:33 [ 26.898492] BUG: Bad rss-counter state mm:0000000023d3ae0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16197' (ECDSA) to the list of known hosts. 2023/06/21 03:41:14 fuzzer started 2023/06/21 03:41:15 dialing manager at localhost:36067 2023/06/21 03:41:15 checking machine... 2023/06/21 03:41:15 checking revisions... [ 27.546464] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:41:15 testing simple program... [ 27.598333] cgroup: Unknown subsys name 'net' [ 27.652850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85616740 RCX=ffffffff812e0344 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09dc8 RBP=1ffff1100d9c13b5 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =ffffed100d9c13b9 R10=0000000000000003 R11=0000000000000001 R12=0000000000000000 R13=0000000000000246 R14=00000000000060a9 R15=ffff88806ce3a2d2 RIP=ffffffff812e0351 RFL=00000046 [---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 00007fb62143c900 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=00007fb6208a8e60 CR3=000000000f766000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ac8515d8fe905f4800000000000ae988 XMM05=1b60e7e3634a794f0000000000134680 XMM06=806171799158d96700000000001330e0 XMM07=fb795ef6d65770560000000000121600 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880179a74b8 RCX=0000000000000001 RDX=1ffff11002f34e98 RSI=ffffffff83868346 RDI=ffff8880179a74c0 RBP=0000000000000007 RSP=ffff8880179a73d0 R8 =0000000000000001 R9 =ffff8880179a7430 R10=0000000000038001 R11=0000000000091ae9 R12=ffff8880179a74b8 R13=0000000000000000 R14=ffff88800ff33680 R15=0000000000000000 RIP=ffffffff813ad4be RFL=00000212 [----A--] 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 00007f43903a0900 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=00007f4390957618 CR3=0000000014780000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000