[ 31.107331] BUG: Bad rss-counter state mm:00000000ade7634e type:MM_FILEPAGES val:33 [ 31.108787] BUG: Bad rss-counter state mm:00000000ade7634e type:MM_ANONPAGES val:22 [ 31.222791] ================================================================== [ 31.223927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.225114] Read of size 8 at addr ffff88800c484058 by task sshd/220 [ 31.226219] [ 31.226478] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.227395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.228441] Call Trace: [ 31.228768] [ 31.229065] dump_stack_lvl+0x91/0xf0 [ 31.229596] print_report+0xcc/0x620 [ 31.230109] ? __virt_addr_valid+0x102/0x340 [ 31.230694] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231338] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231993] kasan_report+0xbe/0xf0 [ 31.232496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233149] vma_interval_tree_remove+0xc75/0xec0 [ 31.233798] vma_prepare+0xc54/0x11a0 [ 31.234309] __split_vma+0x5af/0x950 [ 31.234807] ? __pfx___split_vma+0x10/0x10 [ 31.235363] ? find_held_lock+0x2c/0x110 [ 31.235918] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.236525] ? lock_is_held_type+0x9f/0x120 [ 31.237088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.237751] ? mtree_range_walk+0x632/0x900 [ 31.238338] ? mas_walk+0x5c7/0x7c0 [ 31.238830] do_vmi_munmap+0x1f1/0x2b0 [ 31.239345] mmap_region+0x1f9/0x2660 [ 31.239853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.240398] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.241162] ? __pfx_lock_acquire+0x10/0x10 [ 31.241729] ? __pfx_mmap_region+0x10/0x10 [ 31.242304] ? security_mmap_addr+0x7d/0xa0 [ 31.242874] ? get_unmapped_area+0x1f5/0x3f0 [ 31.243467] do_mmap+0x854/0xf00 [ 31.243932] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.244474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.245062] ksys_mmap_pgoff+0x3af/0x500 [ 31.245614] do_syscall_64+0x3f/0x90 [ 31.246124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246768] RIP: 0033:0x7f71da89fd82 [ 31.247218] 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 [ 31.249332] RSP: 002b:00007ffdca1e8ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.250233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71da89fd82 [ 31.251065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71d9cd9000 [ 31.251897] RBP: 00007f71d9cd9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.252729] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609eeeadf70 [ 31.253568] R13: 00007ffdca1e8b00 R14: 00007ffdca1e8b30 R15: 00007ffdca1e8e90 [ 31.254411] [ 31.254700] [ 31.254912] Allocated by task 213: [ 31.255340] kasan_save_stack+0x22/0x50 [ 31.255839] kasan_set_track+0x25/0x30 [ 31.256322] __kasan_slab_alloc+0x59/0x70 [ 31.256837] kmem_cache_alloc+0x16b/0x370 [ 31.257371] vm_area_dup+0x20/0x160 [ 31.257824] __split_vma+0x170/0x950 [ 31.258295] split_vma+0xc6/0x110 [ 31.258732] mprotect_fixup+0x8d2/0xb30 [ 31.259225] do_mprotect_pkey+0x87e/0xd40 [ 31.259735] __x64_sys_mprotect+0x78/0xc0 [ 31.260253] do_syscall_64+0x3f/0x90 [ 31.260726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261371] [ 31.261587] Freed by task 213: [ 31.261972] kasan_save_stack+0x22/0x50 [ 31.262469] kasan_set_track+0x25/0x30 [ 31.262953] kasan_save_free_info+0x2b/0x50 [ 31.263480] __kasan_slab_free+0x10a/0x190 [ 31.264006] kmem_cache_free+0x10d/0x4d0 [ 31.264504] rcu_core+0x8c8/0x2860 [ 31.264943] __do_softirq+0x1b7/0x7d4 [ 31.265431] [ 31.265644] Last potentially related work creation: [ 31.266216] kasan_save_stack+0x22/0x50 [ 31.266761] __kasan_record_aux_stack+0x8e/0xa0 [ 31.267329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.267964] remove_vma+0x139/0x170 [ 31.268413] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.268965] do_vmi_munmap+0x1f1/0x2b0 [ 31.269458] __vm_munmap+0x138/0x3a0 [ 31.269923] __x64_sys_munmap+0x59/0x80 [ 31.270415] do_syscall_64+0x3f/0x90 [ 31.270881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271521] [ 31.271733] The buggy address belongs to the object at ffff88800c484000 [ 31.271733] which belongs to the cache vm_area_struct of size 168 [ 31.273180] The buggy address is located 88 bytes inside of [ 31.273180] freed 168-byte region [ffff88800c484000, ffff88800c4840a8) [ 31.274574] [ 31.274787] The buggy address belongs to the physical page: [ 31.275433] page:0000000051178473 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc484 [ 31.276502] memcg:ffff88800bbd2801 [ 31.276925] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.277636] page_type: 0xffffffff() [ 31.278082] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c1100 dead000000000007 [ 31.278997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bbd2801 [ 31.279909] page dumped because: kasan: bad access detected [ 31.280583] [ 31.280797] Memory state around the buggy address: [ 31.281383] ffff88800c483f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.282242] ffff88800c483f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.283089] >ffff88800c484000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.283944] ^ [ 31.284673] ffff88800c484080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.285554] ffff88800c484100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.286401] ================================================================== [ 31.287318] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.464432] BUG: Bad rss-counter state mm:000000001c419260 type:MM_FILEPAGES val:33 [ 33.465527] BUG: Bad rss-counter state mm:000000001c419260 type:MM_ANONPAGES val:22 [ 33.953247] BUG: Bad rss-counter state mm:00000000cccd6ae5 type:MM_FILEPAGES val:33 [ 33.954486] BUG: Bad rss-counter state mm:00000000cccd6ae5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12882' (ECDSA) to the list of known hosts. 2023/06/21 10:35:31 fuzzer started 2023/06/21 10:35:31 dialing manager at localhost:36067 2023/06/21 10:35:31 checking machine... 2023/06/21 10:35:31 checking revisions... [ 34.656967] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:35:31 testing simple program... [ 34.711233] cgroup: Unknown subsys name 'net' [ 34.868572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:35:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016617870 RCX=0000000000000001 RDX=1ffff11002cc2f0f RSI=ffff8880166179a0 RDI=ffff888016617878 RBP=ffff8880166179a0 RSP=ffff8880166177c8 R8 =ffffffff860d825a R9 =ffff8880166178b0 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff8880166178b8 R14=ffff8880166179a8 R15=ffff888016617870 RIP=ffffffff81130445 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 00007fbd35bb6900 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=00007fbd3616d618 CR3=000000001c946000 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=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 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=00007f11fc442020 CR3=000000000d632000 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=6649c1655f67bf890f4ae8a57c8d4587 XMM02=ec2efd57dc4c00df000000000011acd0 XMM03=6553c8b2a608f9f6000000000011ada0 XMM04=cc1ad5a3441fc5ce00000000000ae988 XMM05=739dc3419c5ea6110000000000132788 XMM06=4fda316b135da52b00000000001314b8 XMM07=e042d86d42eb936e0000000000121d88 XMM08=6553c8b2a608f9f6000000000011ada0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000