[ 24.981203] BUG: Bad rss-counter state mm:000000004cdedac4 type:MM_FILEPAGES val:33 [ 24.982625] BUG: Bad rss-counter state mm:000000004cdedac4 type:MM_ANONPAGES val:22 [ 25.147005] ================================================================== [ 25.147909] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.148854] Read of size 8 at addr ffff88800f907798 by task sshd/219 [ 25.149624] [ 25.149845] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.150821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.151794] Call Trace: [ 25.152112] [ 25.152426] dump_stack_lvl+0x91/0xf0 [ 25.152914] print_report+0xcc/0x620 [ 25.153401] ? __virt_addr_valid+0x102/0x340 [ 25.153949] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.154566] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.155188] kasan_report+0xbe/0xf0 [ 25.155670] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.156294] vma_interval_tree_remove+0xc75/0xec0 [ 25.156905] vma_prepare+0xc54/0x11a0 [ 25.157384] __split_vma+0x5af/0x950 [ 25.157863] ? __pfx___split_vma+0x10/0x10 [ 25.158395] ? find_held_lock+0x2c/0x110 [ 25.158918] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.159489] ? lock_is_held_type+0x9f/0x120 [ 25.160028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.160646] ? mtree_range_walk+0x632/0x900 [ 25.161196] ? mas_walk+0x5c7/0x7c0 [ 25.161670] do_vmi_munmap+0x1f1/0x2b0 [ 25.162166] mmap_region+0x1f9/0x2660 [ 25.162653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.163168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.163885] ? __pfx_lock_acquire+0x10/0x10 [ 25.164446] ? __pfx_mmap_region+0x10/0x10 [ 25.164975] ? security_mmap_addr+0x7d/0xa0 [ 25.165508] ? get_unmapped_area+0x1f5/0x3f0 [ 25.166052] do_mmap+0x854/0xf00 [ 25.166494] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.166992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.167561] ksys_mmap_pgoff+0x3af/0x500 [ 25.168071] do_syscall_64+0x3f/0x90 [ 25.168564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.169208] RIP: 0033:0x7f9366dddd82 [ 25.169665] 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 [ 25.171797] RSP: 002b:00007ffd69b861e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.172722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9366dddd82 [ 25.173580] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9366217000 [ 25.174436] RBP: 00007f9366217000 R08: 0000000000000009 R09: 0000000000001000 [ 25.175284] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7396adec0 [ 25.176133] R13: 00007ffd69b86200 R14: 00007ffd69b86230 R15: 00007ffd69b86590 [ 25.177004] [ 25.177303] [ 25.177518] Allocated by task 212: [ 25.177950] kasan_save_stack+0x22/0x50 [ 25.178456] kasan_set_track+0x25/0x30 [ 25.178954] __kasan_slab_alloc+0x59/0x70 [ 25.179477] kmem_cache_alloc+0x16b/0x370 [ 25.179995] vm_area_dup+0x20/0x160 [ 25.180459] __split_vma+0x170/0x950 [ 25.180929] split_vma+0xc6/0x110 [ 25.181369] mprotect_fixup+0x8d2/0xb30 [ 25.181871] do_mprotect_pkey+0x87e/0xd40 [ 25.182396] __x64_sys_mprotect+0x78/0xc0 [ 25.182922] do_syscall_64+0x3f/0x90 [ 25.183399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.184050] [ 25.184265] Freed by task 203: [ 25.184673] kasan_save_stack+0x22/0x50 [ 25.185179] kasan_set_track+0x25/0x30 [ 25.185697] kasan_save_free_info+0x2b/0x50 [ 25.186234] __kasan_slab_free+0x10a/0x190 [ 25.186773] kmem_cache_free+0x10d/0x4d0 [ 25.187285] rcu_core+0x8c8/0x2860 [ 25.187732] __do_softirq+0x1b7/0x7d4 [ 25.188211] [ 25.188450] Last potentially related work creation: [ 25.189037] kasan_save_stack+0x22/0x50 [ 25.189540] __kasan_record_aux_stack+0x8e/0xa0 [ 25.190119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.190763] remove_vma+0x139/0x170 [ 25.191221] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.191781] do_vmi_munmap+0x1f1/0x2b0 [ 25.192268] __vm_munmap+0x138/0x3a0 [ 25.192757] __x64_sys_munmap+0x59/0x80 [ 25.193258] do_syscall_64+0x3f/0x90 [ 25.193731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.194386] [ 25.194607] The buggy address belongs to the object at ffff88800f907740 [ 25.194607] which belongs to the cache vm_area_struct of size 168 [ 25.196108] The buggy address is located 88 bytes inside of [ 25.196108] freed 168-byte region [ffff88800f907740, ffff88800f9077e8) [ 25.197545] [ 25.197767] The buggy address belongs to the physical page: [ 25.198432] page:0000000035860916 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800f9071d0 pfn:0xf907 [ 25.199684] memcg:ffff88800f903701 [ 25.200121] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.200852] page_type: 0xffffffff() [ 25.201322] raw: 0100000000000200 ffff88800879fc80 ffffea0000389b80 dead000000000003 [ 25.202280] raw: ffff88800f9071d0 0000000080110010 00000001ffffffff ffff88800f903701 [ 25.203224] page dumped because: kasan: bad access detected [ 25.203914] [ 25.204137] Memory state around the buggy address: [ 25.204758] ffff88800f907680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.205657] ffff88800f907700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.206551] >ffff88800f907780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.207441] ^ [ 25.207958] ffff88800f907800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 25.208882] ffff88800f907880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 25.209768] ================================================================== [ 25.210848] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.980497] BUG: Bad rss-counter state mm:000000000efd2324 type:MM_FILEPAGES val:33 [ 26.981479] BUG: Bad rss-counter state mm:000000000efd2324 type:MM_ANONPAGES val:22 [ 27.544951] BUG: Bad rss-counter state mm:00000000fadd3ad7 type:MM_FILEPAGES val:33 [ 27.546191] BUG: Bad rss-counter state mm:00000000fadd3ad7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44286' (ECDSA) to the list of known hosts. 2023/06/20 04:24:55 fuzzer started 2023/06/20 04:24:55 dialing manager at localhost:44161 2023/06/20 04:24:55 checking machine... 2023/06/20 04:24:55 checking revisions... [ 28.218750] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:24:55 testing simple program... [ 28.270444] cgroup: Unknown subsys name 'net' [ 28.309734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:24:53 Registers: info registers vcpu 0 RAX=00007ffebb4e1068 RBX=0000563f8f7803f5 RCX=0000563f8f7803f6 RDX=000000000000002e RSI=000000000000000a RDI=1999999999999999 RBP=0000000000000000 RSP=00007ffebb4e0fe0 R8 =0000000000000002 R9 =0000000000000000 R10=00007fc6d1da2ac0 R11=00007fc6d1da33c0 R12=0000000000000000 R13=0000563f8f7803f5 R14=0000000000000000 R15=000000000000000a RIP=00007fc6d1c71b86 RFL=00000202 [-------] 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 00007fc6d183d900 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=00007fc6d1df4618 CR3=000000000e990000 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=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fd53 RSP=ffff8880090dfbb8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000287 R13=ffffea000058c700 R14=ffffffff81bae6ca R15=0000000000000001 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 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=00007f97d672fc00 CR3=0000000018fee000 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=2034353a34323a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000