[ 31.142462] BUG: Bad rss-counter state mm:000000002b6188fc type:MM_FILEPAGES val:33 [ 31.143205] BUG: Bad rss-counter state mm:000000002b6188fc type:MM_ANONPAGES val:22 [ 31.267939] ================================================================== [ 31.268687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.269292] Read of size 8 at addr ffff88800da76df0 by task sshd/218 [ 31.269841] [ 31.269989] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.270638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.271350] Call Trace: [ 31.271575] [ 31.271764] dump_stack_lvl+0x91/0xf0 [ 31.272122] print_report+0xcc/0x620 [ 31.272653] ? __virt_addr_valid+0x102/0x340 [ 31.273029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273931] kasan_report+0xbe/0xf0 [ 31.274263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274721] vma_interval_tree_remove+0xc75/0xec0 [ 31.275170] vma_prepare+0xc54/0x11a0 [ 31.275493] __split_vma+0x5af/0x950 [ 31.275815] ? __pfx___split_vma+0x10/0x10 [ 31.276184] ? find_held_lock+0x2c/0x110 [ 31.276550] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.276957] ? lock_is_held_type+0x9f/0x120 [ 31.277406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.277825] ? mtree_range_walk+0x632/0x900 [ 31.278186] ? mas_walk+0x5c7/0x7c0 [ 31.278493] do_vmi_munmap+0x1f1/0x2b0 [ 31.278821] mmap_region+0x1f9/0x2660 [ 31.279151] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.279533] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.280048] ? __pfx_lock_acquire+0x10/0x10 [ 31.280425] ? __pfx_mmap_region+0x10/0x10 [ 31.280796] ? security_mmap_addr+0x7d/0xa0 [ 31.281160] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281664] do_mmap+0x854/0xf00 [ 31.281981] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.282724] ksys_mmap_pgoff+0x3af/0x500 [ 31.283073] do_syscall_64+0x3f/0x90 [ 31.283412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283865] RIP: 0033:0x7f93faefad82 [ 31.284206] 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 [ 31.285833] RSP: 002b:00007ffdd53e0d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.286468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93faefad82 [ 31.287111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93fa334000 [ 31.287709] RBP: 00007f93fa334000 R08: 0000000000000009 R09: 0000000000001000 [ 31.288421] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cac9b95ec0 [ 31.289025] R13: 00007ffdd53e0d50 R14: 00007ffdd53e0d80 R15: 00007ffdd53e10e0 [ 31.289668] [ 31.289874] [ 31.290026] Allocated by task 211: [ 31.290326] kasan_save_stack+0x22/0x50 [ 31.290722] kasan_set_track+0x25/0x30 [ 31.291066] __kasan_slab_alloc+0x59/0x70 [ 31.291440] kmem_cache_alloc+0x16b/0x370 [ 31.291794] vm_area_dup+0x20/0x160 [ 31.292121] __split_vma+0x170/0x950 [ 31.292505] split_vma+0xc6/0x110 [ 31.292838] mprotect_fixup+0x8d2/0xb30 [ 31.293195] do_mprotect_pkey+0x87e/0xd40 [ 31.293616] __x64_sys_mprotect+0x78/0xc0 [ 31.293994] do_syscall_64+0x3f/0x90 [ 31.294329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294761] [ 31.294910] Freed by task 202: [ 31.295179] kasan_save_stack+0x22/0x50 [ 31.295541] kasan_set_track+0x25/0x30 [ 31.295932] kasan_save_free_info+0x2b/0x50 [ 31.296301] __kasan_slab_free+0x10a/0x190 [ 31.296680] kmem_cache_free+0x10d/0x4d0 [ 31.297026] rcu_core+0x8c8/0x2860 [ 31.297371] __do_softirq+0x1b7/0x7d4 [ 31.297701] [ 31.297859] Last potentially related work creation: [ 31.298288] kasan_save_stack+0x22/0x50 [ 31.298658] __kasan_record_aux_stack+0x8e/0xa0 [ 31.299053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.299503] remove_vma+0x139/0x170 [ 31.299827] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.300214] do_vmi_munmap+0x1f1/0x2b0 [ 31.300546] __vm_munmap+0x138/0x3a0 [ 31.300874] __x64_sys_munmap+0x59/0x80 [ 31.301217] do_syscall_64+0x3f/0x90 [ 31.301667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302164] [ 31.302316] Second to last potentially related work creation: [ 31.302768] kasan_save_stack+0x22/0x50 [ 31.303107] __kasan_record_aux_stack+0x8e/0xa0 [ 31.303499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.303935] remove_vma+0x139/0x170 [ 31.304250] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.304680] do_vmi_munmap+0x1f1/0x2b0 [ 31.305019] mmap_region+0x1f9/0x2660 [ 31.305385] do_mmap+0x854/0xf00 [ 31.305676] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.306015] ksys_mmap_pgoff+0x3af/0x500 [ 31.306355] do_syscall_64+0x3f/0x90 [ 31.306675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.307197] [ 31.307340] The buggy address belongs to the object at ffff88800da76d98 [ 31.307340] which belongs to the cache vm_area_struct of size 168 [ 31.308345] The buggy address is located 88 bytes inside of [ 31.308345] freed 168-byte region [ffff88800da76d98, ffff88800da76e40) [ 31.309530] [ 31.309689] The buggy address belongs to the physical page: [ 31.310137] page:00000000e8bfd7de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda76 [ 31.310931] memcg:ffff88800e71cd01 [ 31.311229] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.311713] page_type: 0xffffffff() [ 31.312051] raw: 0100000000000200 ffff8880087a0c80 ffffea0000602800 dead000000000007 [ 31.312734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e71cd01 [ 31.313396] page dumped because: kasan: bad access detected [ 31.313846] [ 31.313994] Memory state around the buggy address: [ 31.314429] ffff88800da76c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.315043] ffff88800da76d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.315623] >ffff88800da76d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.316271] ^ [ 31.316832] ffff88800da76e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.317456] ffff88800da76e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.318083] ================================================================== [ 31.318854] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.676597] BUG: Bad rss-counter state mm:00000000120f9ae9 type:MM_FILEPAGES val:33 [ 32.677299] BUG: Bad rss-counter state mm:00000000120f9ae9 type:MM_ANONPAGES val:22 [ 33.054822] BUG: Bad rss-counter state mm:00000000fddbf421 type:MM_FILEPAGES val:33 [ 33.055482] BUG: Bad rss-counter state mm:00000000fddbf421 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24290' (ECDSA) to the list of known hosts. 2023/06/21 09:50:49 fuzzer started 2023/06/21 09:50:49 dialing manager at localhost:36067 2023/06/21 09:50:49 checking machine... 2023/06/21 09:50:49 checking revisions... [ 33.627388] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:50:49 testing simple program... [ 33.667975] cgroup: Unknown subsys name 'net' [ 33.711535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff5c800cd8 CR3=0000000005482000 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=00007f6aaeaa35100000557823242790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000021e7d RBX=0000000000000001 RCX=ffffffff81846193 RDX=0000000000021e87 RSI=0000000000008461 RDI=0000000000065b77 RBP=ffff88801a03f368 RSP=ffff88801a03f2a0 R8 =ffffffff8613f3f6 R9 =ffff88801a03f350 R10=0000000000038001 R11=0000000000021e7d R12=ffff88801a03f370 R13=ffff88801a03f358 R14=ffff88801a03f351 R15=ffff88801a03f310 RIP=ffffffff81130853 RFL=00000293 [--S-A-C] 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 00007f08215d5900 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=00007f0821b8c618 CR3=000000001ca62000 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