[ 31.024620] BUG: Bad rss-counter state mm:000000007aabf08c type:MM_FILEPAGES val:33 [ 31.025880] BUG: Bad rss-counter state mm:000000007aabf08c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.190376] ================================================================== [ 31.191360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.192359] Read of size 8 at addr ffff8880095c36b0 by task sshd/219 [ 31.193307] [ 31.193537] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.194478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.195549] Call Trace: [ 31.195891] [ 31.196191] dump_stack_lvl+0x91/0xf0 [ 31.196716] print_report+0xcc/0x620 [ 31.197228] ? __virt_addr_valid+0x102/0x340 [ 31.197825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198488] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.199150] kasan_report+0xbe/0xf0 [ 31.199665] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200327] vma_interval_tree_remove+0xc75/0xec0 [ 31.200973] vma_prepare+0xc54/0x11a0 [ 31.201485] __split_vma+0x5af/0x950 [ 31.201990] ? __pfx___split_vma+0x10/0x10 [ 31.202565] ? find_held_lock+0x2c/0x110 [ 31.203125] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.203728] ? lock_is_held_type+0x9f/0x120 [ 31.204307] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.204951] ? mtree_range_walk+0x632/0x900 [ 31.205541] ? mas_walk+0x5c7/0x7c0 [ 31.206051] do_vmi_munmap+0x1f1/0x2b0 [ 31.206603] mmap_region+0x1f9/0x2660 [ 31.207125] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.207678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.208441] ? __pfx_lock_acquire+0x10/0x10 [ 31.209009] ? __pfx_mmap_region+0x10/0x10 [ 31.209572] ? security_mmap_addr+0x7d/0xa0 [ 31.210142] ? get_unmapped_area+0x1f5/0x3f0 [ 31.210732] do_mmap+0x854/0xf00 [ 31.211204] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.211733] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.212334] ksys_mmap_pgoff+0x3af/0x500 [ 31.212881] do_syscall_64+0x3f/0x90 [ 31.213391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214086] RIP: 0033:0x7f1572c86d82 [ 31.214588] 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 [ 31.216875] RSP: 002b:00007ffe1c2b68c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.217839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1572c86d82 [ 31.218754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15720c0000 [ 31.219667] RBP: 00007f15720c0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.220583] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e696d89d90 [ 31.221490] R13: 00007ffe1c2b68e0 R14: 00007ffe1c2b6910 R15: 00007ffe1c2b6c70 [ 31.222412] [ 31.222747] [ 31.222979] Allocated by task 212: [ 31.223435] kasan_save_stack+0x22/0x50 [ 31.223979] kasan_set_track+0x25/0x30 [ 31.224512] __kasan_slab_alloc+0x59/0x70 [ 31.225082] kmem_cache_alloc+0x16b/0x370 [ 31.225635] vm_area_dup+0x20/0x160 [ 31.226123] __split_vma+0x170/0x950 [ 31.226633] split_vma+0xc6/0x110 [ 31.227100] mprotect_fixup+0x8d2/0xb30 [ 31.227636] do_mprotect_pkey+0x87e/0xd40 [ 31.228190] __x64_sys_mprotect+0x78/0xc0 [ 31.228744] do_syscall_64+0x3f/0x90 [ 31.229253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229943] [ 31.230175] Freed by task 212: [ 31.230604] kasan_save_stack+0x22/0x50 [ 31.231142] kasan_set_track+0x25/0x30 [ 31.231676] kasan_save_free_info+0x2b/0x50 [ 31.232243] __kasan_slab_free+0x10a/0x190 [ 31.232817] kmem_cache_free+0x10d/0x4d0 [ 31.233362] rcu_core+0x8c8/0x2860 [ 31.233839] __do_softirq+0x1b7/0x7d4 [ 31.234348] [ 31.234601] Last potentially related work creation: [ 31.235228] kasan_save_stack+0x22/0x50 [ 31.235771] __kasan_record_aux_stack+0x8e/0xa0 [ 31.236384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237067] remove_vma+0x139/0x170 [ 31.237546] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238147] do_vmi_munmap+0x1f1/0x2b0 [ 31.238678] __vm_munmap+0x138/0x3a0 [ 31.239181] __x64_sys_munmap+0x59/0x80 [ 31.239710] do_syscall_64+0x3f/0x90 [ 31.240215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240901] [ 31.241130] Second to last potentially related work creation: [ 31.241864] kasan_save_stack+0x22/0x50 [ 31.242400] __kasan_record_aux_stack+0x8e/0xa0 [ 31.243037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.243725] remove_vma+0x139/0x170 [ 31.244206] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.244808] do_vmi_munmap+0x1f1/0x2b0 [ 31.245325] mmap_region+0x1f9/0x2660 [ 31.245837] do_mmap+0x854/0xf00 [ 31.246297] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.246824] ksys_mmap_pgoff+0x3af/0x500 [ 31.247358] do_syscall_64+0x3f/0x90 [ 31.247866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248552] [ 31.248783] The buggy address belongs to the object at ffff8880095c3658 [ 31.248783] which belongs to the cache vm_area_struct of size 168 [ 31.250361] The buggy address is located 88 bytes inside of [ 31.250361] freed 168-byte region [ffff8880095c3658, ffff8880095c3700) [ 31.251887] [ 31.252116] The buggy address belongs to the physical page: [ 31.252817] page:00000000beaa0ad1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95c3 [ 31.253976] memcg:ffff88800c9b9801 [ 31.254448] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.255199] page_type: 0xffffffff() [ 31.255681] raw: 0100000000000200 ffff88800879fc80 ffffea0000373d00 dead000000000007 [ 31.256657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9b9801 [ 31.257631] page dumped because: kasan: bad access detected [ 31.258339] [ 31.258581] Memory state around the buggy address: [ 31.259204] ffff8880095c3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.260130] ffff8880095c3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.261047] >ffff8880095c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261961] ^ [ 31.262604] ffff8880095c3700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.263517] ffff8880095c3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.264425] ================================================================== [ 31.265655] Disabling lock debugging due to kernel taint [ 33.042604] BUG: Bad rss-counter state mm:00000000a0837c13 type:MM_FILEPAGES val:33 [ 33.043587] BUG: Bad rss-counter state mm:00000000a0837c13 type:MM_ANONPAGES val:22 [ 33.577596] BUG: Bad rss-counter state mm:0000000007a495be type:MM_FILEPAGES val:33 [ 33.578764] BUG: Bad rss-counter state mm:0000000007a495be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35568' (ECDSA) to the list of known hosts. 2023/06/19 17:07:33 fuzzer started 2023/06/19 17:07:34 dialing manager at localhost:44161 2023/06/19 17:07:34 checking machine... 2023/06/19 17:07:34 checking revisions... [ 34.277012] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:07:34 testing simple program... [ 34.327108] cgroup: Unknown subsys name 'net' [ 34.371347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:07:33 Registers: info registers vcpu 0 RAX=00007f6a1cd0d8b0 RBX=000000000000002e RCX=0000000200000001 RDX=00007f6a1cd0d7b0 RSI=0000000000000070 RDI=0000001d00000001 RBP=0000562f186c51c0 RSP=00007f6a1cd0d700 R8 =0000000000000053 R9 =0000000000000001 R10=0000000000000001 R11=00007f6a1cd0d8b0 R12=0000000000000053 R13=0000000000001fa0 R14=00007f6a18000ba0 R15=00007f6a1cde4840 RIP=00007f6a1cde11d8 RFL=00000287 [--S--PC] 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 00007f6a1cd11700 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=00007fc638248618 CR3=000000000eb56000 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=0000000000083fb90000000064908b55 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033333a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd94e0a1bc0 CR3=000000000f766000 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=efa0265e12a7439527453d362ad13e2f XMM02=000000000011f948ec2efd57dc4c00df XMM03=00000000001235f0263248f2a77ef242 XMM04=6576080fc694032500000000000ae988 XMM05=dfcdbad4f1609c370000000000134210 XMM06=1828ac8bef6ce25d0000000000132c80 XMM07=e042d86d42eb936e00000000001238c8 XMM08=263248f2a77ef242000000000011f9a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000