[ 24.025554] BUG: Bad rss-counter state mm:00000000d01641eb type:MM_FILEPAGES val:33 [ 24.026717] BUG: Bad rss-counter state mm:00000000d01641eb type:MM_ANONPAGES val:22 [ 24.180148] ================================================================== [ 24.181185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.182257] Read of size 8 at addr ffff88800e5ee4e0 by task sshd/219 [ 24.183313] [ 24.183570] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.184562] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.185724] Call Trace: [ 24.186055] [ 24.186324] dump_stack_lvl+0x91/0xf0 [ 24.186787] print_report+0xcc/0x620 [ 24.187250] ? __virt_addr_valid+0x102/0x340 [ 24.187775] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.188363] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.188941] kasan_report+0xbe/0xf0 [ 24.189392] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.190010] vma_interval_tree_remove+0xc75/0xec0 [ 24.190720] vma_prepare+0xc54/0x11a0 [ 24.191280] __split_vma+0x5af/0x950 [ 24.191836] ? __pfx___split_vma+0x10/0x10 [ 24.192458] ? find_held_lock+0x2c/0x110 [ 24.193072] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.193758] ? lock_is_held_type+0x9f/0x120 [ 24.194389] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.195095] ? mtree_range_walk+0x632/0x900 [ 24.195739] ? mas_walk+0x5c7/0x7c0 [ 24.196297] do_vmi_munmap+0x1f1/0x2b0 [ 24.196871] mmap_region+0x1f9/0x2660 [ 24.197434] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.198050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.198876] ? __pfx_lock_acquire+0x10/0x10 [ 24.199501] ? __pfx_mmap_region+0x10/0x10 [ 24.200120] ? security_mmap_addr+0x7d/0xa0 [ 24.200740] ? get_unmapped_area+0x1f5/0x3f0 [ 24.201384] do_mmap+0x854/0xf00 [ 24.201912] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.202496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.203152] ksys_mmap_pgoff+0x3af/0x500 [ 24.203751] do_syscall_64+0x3f/0x90 [ 24.204314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.205073] RIP: 0033:0x7f36c47eed82 [ 24.205618] 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 [ 24.208128] RSP: 002b:00007fff4da094d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.209189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36c47eed82 [ 24.210308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36c3c28000 [ 24.211320] RBP: 00007f36c3c28000 R08: 0000000000000009 R09: 0000000000001000 [ 24.212258] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b40978eec0 [ 24.213196] R13: 00007fff4da094f0 R14: 00007fff4da09520 R15: 00007fff4da09880 [ 24.214201] [ 24.214610] [ 24.214927] Allocated by task 210: [ 24.215516] kasan_save_stack+0x22/0x50 [ 24.216151] kasan_set_track+0x25/0x30 [ 24.216740] __kasan_slab_alloc+0x59/0x70 [ 24.217390] kmem_cache_alloc+0x16b/0x370 [ 24.218065] vm_area_dup+0x20/0x160 [ 24.218601] __split_vma+0x170/0x950 [ 24.219107] split_vma+0xc6/0x110 [ 24.219553] mprotect_fixup+0x8d2/0xb30 [ 24.220065] do_mprotect_pkey+0x87e/0xd40 [ 24.220586] __x64_sys_mprotect+0x78/0xc0 [ 24.221104] do_syscall_64+0x3f/0x90 [ 24.221599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.222250] [ 24.222467] Freed by task 210: [ 24.222862] kasan_save_stack+0x22/0x50 [ 24.223370] kasan_set_track+0x25/0x30 [ 24.223935] kasan_save_free_info+0x2b/0x50 [ 24.224597] __kasan_slab_free+0x10a/0x190 [ 24.225260] kmem_cache_free+0x10d/0x4d0 [ 24.225903] rcu_core+0x8c8/0x2860 [ 24.226463] __do_softirq+0x1b7/0x7d4 [ 24.227057] [ 24.227328] Last potentially related work creation: [ 24.228060] kasan_save_stack+0x22/0x50 [ 24.228684] __kasan_record_aux_stack+0x8e/0xa0 [ 24.229403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.230221] remove_vma+0x139/0x170 [ 24.230787] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.231483] do_vmi_munmap+0x1f1/0x2b0 [ 24.232093] __vm_munmap+0x138/0x3a0 [ 24.232683] __x64_sys_munmap+0x59/0x80 [ 24.233306] do_syscall_64+0x3f/0x90 [ 24.233917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.234724] [ 24.234992] The buggy address belongs to the object at ffff88800e5ee488 [ 24.234992] which belongs to the cache vm_area_struct of size 168 [ 24.236836] The buggy address is located 88 bytes inside of [ 24.236836] freed 168-byte region [ffff88800e5ee488, ffff88800e5ee530) [ 24.238604] [ 24.238870] The buggy address belongs to the physical page: [ 24.239687] page:00000000989501b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ee [ 24.241050] memcg:ffff88800e441901 [ 24.241597] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.242404] page_type: 0xffffffff() [ 24.242962] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a9900 dead000000000008 [ 24.244104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e441901 [ 24.245216] page dumped because: kasan: bad access detected [ 24.246015] [ 24.246270] Memory state around the buggy address: [ 24.246949] ffff88800e5ee380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.247907] ffff88800e5ee400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.248856] >ffff88800e5ee480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.249814] ^ [ 24.250668] ffff88800e5ee500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.251618] ffff88800e5ee580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.252565] ================================================================== [ 24.253610] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.851073] BUG: Bad rss-counter state mm:00000000f693ec5e type:MM_FILEPAGES val:33 [ 26.852569] BUG: Bad rss-counter state mm:00000000f693ec5e type:MM_ANONPAGES val:22 [ 27.309533] BUG: Bad rss-counter state mm:00000000b3f1f881 type:MM_FILEPAGES val:33 [ 27.310710] BUG: Bad rss-counter state mm:00000000b3f1f881 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17285' (ECDSA) to the list of known hosts. 2023/06/21 05:36:49 fuzzer started 2023/06/21 05:36:49 dialing manager at localhost:36067 2023/06/21 05:36:49 checking machine... 2023/06/21 05:36:49 checking revisions... [ 27.925585] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:36:50 testing simple program... [ 27.969761] cgroup: Unknown subsys name 'net' [ 28.013068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:49 Registers: info registers vcpu 0 RAX=0000000000000021 RBX=0000000000000001 RCX=ffffffff84601449 RDX=0000000000000021 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffff88806ce09ac8 RSP=ffff88806ce099e8 R8 =ffffffff864bcdf6 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8112fc16 RFL=00000206 [-----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 00007ff02e21d900 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=00007ff02e7d4618 CR3=000000000e180000 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=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=00007ff0f680e000 CR3=000000000d696000 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=49341729485614a5fc4141b85ba156c7 XMM02=000000000011dcb8ec2efd57dc4c00df XMM03=0000000000122858dee42bef680cd14b XMM04=82c95ae1f2cb37dd00000000000ae988 XMM05=dfcdbad4f1609c3700000000001326a0 XMM06=925a3f12cdc3311800000000001315a8 XMM07=e042d86d42eb936e0000000000122b30 XMM08=dee42bef680cd14b000000000011dd18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000