[ 23.950905] BUG: Bad rss-counter state mm:00000000448e789a type:MM_FILEPAGES val:33 [ 23.951968] BUG: Bad rss-counter state mm:00000000448e789a type:MM_ANONPAGES val:22 [ 24.120893] ================================================================== [ 24.121938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.123027] Read of size 8 at addr ffff88800df49058 by task sshd/219 [ 24.124082] [ 24.124348] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.125343] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.126444] Call Trace: [ 24.126768] [ 24.127054] dump_stack_lvl+0x91/0xf0 [ 24.127625] print_report+0xcc/0x620 [ 24.128219] ? __virt_addr_valid+0x102/0x340 [ 24.128865] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.129517] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.130126] kasan_report+0xbe/0xf0 [ 24.130600] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.131222] vma_interval_tree_remove+0xc75/0xec0 [ 24.131825] vma_prepare+0xc54/0x11a0 [ 24.132298] __split_vma+0x5af/0x950 [ 24.132766] ? __pfx___split_vma+0x10/0x10 [ 24.133294] ? find_held_lock+0x2c/0x110 [ 24.133809] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.134380] ? lock_is_held_type+0x9f/0x120 [ 24.134927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.135535] ? mtree_range_walk+0x632/0x900 [ 24.136092] ? mas_walk+0x5c7/0x7c0 [ 24.136582] do_vmi_munmap+0x1f1/0x2b0 [ 24.137077] mmap_region+0x1f9/0x2660 [ 24.137563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.138080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.138792] ? __pfx_lock_acquire+0x10/0x10 [ 24.139338] ? __pfx_mmap_region+0x10/0x10 [ 24.139904] ? security_mmap_addr+0x7d/0xa0 [ 24.140465] ? get_unmapped_area+0x1f5/0x3f0 [ 24.141026] do_mmap+0x854/0xf00 [ 24.141482] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.141988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.142567] ksys_mmap_pgoff+0x3af/0x500 [ 24.143090] do_syscall_64+0x3f/0x90 [ 24.143572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.144232] RIP: 0033:0x7f28b7e86d82 [ 24.144689] 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 [ 24.146833] RSP: 002b:00007fff619a19d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.147736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28b7e86d82 [ 24.148604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28b72c0000 [ 24.149458] RBP: 00007f28b72c0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.150324] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ada5321ec0 [ 24.151187] R13: 00007fff619a19f0 R14: 00007fff619a1a20 R15: 00007fff619a1d80 [ 24.152041] [ 24.152329] [ 24.152540] Allocated by task 211: [ 24.152969] kasan_save_stack+0x22/0x50 [ 24.153477] kasan_set_track+0x25/0x30 [ 24.153977] __kasan_slab_alloc+0x59/0x70 [ 24.154501] kmem_cache_alloc+0x16b/0x370 [ 24.155016] vm_area_dup+0x20/0x160 [ 24.155463] __split_vma+0x170/0x950 [ 24.155950] split_vma+0xc6/0x110 [ 24.156394] mprotect_fixup+0x8d2/0xb30 [ 24.156897] do_mprotect_pkey+0x87e/0xd40 [ 24.157416] __x64_sys_mprotect+0x78/0xc0 [ 24.157942] do_syscall_64+0x3f/0x90 [ 24.158419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.159063] [ 24.159281] Freed by task 13: [ 24.159661] kasan_save_stack+0x22/0x50 [ 24.160172] kasan_set_track+0x25/0x30 [ 24.160662] kasan_save_free_info+0x2b/0x50 [ 24.161204] __kasan_slab_free+0x10a/0x190 [ 24.161736] kmem_cache_free+0x10d/0x4d0 [ 24.162247] rcu_core+0x8c8/0x2860 [ 24.162694] __do_softirq+0x1b7/0x7d4 [ 24.163176] [ 24.163392] Last potentially related work creation: [ 24.163997] kasan_save_stack+0x22/0x50 [ 24.164508] __kasan_record_aux_stack+0x8e/0xa0 [ 24.165137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.165776] remove_vma+0x139/0x170 [ 24.166226] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.166783] do_vmi_munmap+0x1f1/0x2b0 [ 24.167268] __vm_munmap+0x138/0x3a0 [ 24.167729] __x64_sys_munmap+0x59/0x80 [ 24.168240] do_syscall_64+0x3f/0x90 [ 24.168714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.169361] [ 24.169581] The buggy address belongs to the object at ffff88800df49000 [ 24.169581] which belongs to the cache vm_area_struct of size 168 [ 24.171033] The buggy address is located 88 bytes inside of [ 24.171033] freed 168-byte region [ffff88800df49000, ffff88800df490a8) [ 24.172454] [ 24.172670] The buggy address belongs to the physical page: [ 24.173326] page:00000000dddd60ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf49 [ 24.174407] memcg:ffff8880097d2101 [ 24.174833] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.175478] page_type: 0xffffffff() [ 24.175952] raw: 0100000000000200 ffff8880087a0c80 ffffea0000266940 dead000000000006 [ 24.176865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d2101 [ 24.177771] page dumped because: kasan: bad access detected [ 24.178425] [ 24.178641] Memory state around the buggy address: [ 24.179228] ffff88800df48f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 24.180088] ffff88800df48f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.180942] >ffff88800df49000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.181783] ^ [ 24.182506] ffff88800df49080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.183362] ffff88800df49100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.184222] ================================================================== [ 24.185324] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.246092] BUG: Bad rss-counter state mm:00000000362def7f type:MM_FILEPAGES val:33 [ 26.247089] BUG: Bad rss-counter state mm:00000000362def7f type:MM_ANONPAGES val:22 [ 26.804721] BUG: Bad rss-counter state mm:00000000b9ccab4c type:MM_FILEPAGES val:33 [ 26.805899] BUG: Bad rss-counter state mm:00000000b9ccab4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33245' (ECDSA) to the list of known hosts. 2023/06/21 00:34:53 fuzzer started 2023/06/21 00:34:54 dialing manager at localhost:36067 2023/06/21 00:34:54 checking machine... 2023/06/21 00:34:54 checking revisions... [ 27.459277] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:34:54 testing simple program... [ 27.511856] cgroup: Unknown subsys name 'net' [ 27.563599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800eadf388 RCX=ffffffff864b202c RDX=1ffff11001d5be71 RSI=ffff88800eadff50 RDI=ffff88800eadf388 RBP=ffff88800eadff50 RSP=ffff88800eadf2e0 R8 =ffffffff864b2030 R9 =ffff88800eadf3c8 R10=0000000000038001 R11=00000000000b5080 R12=0000000000000008 R13=ffff88800eadf3d0 R14=ffff88800eadff58 R15=ffff88800eadf388 RIP=ffffffff8113041a RFL=00000282 [--S----] 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 00007f5648963900 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=00007f5648f1a618 CR3=000000000c47a000 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=0000000000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888008e37c38 RBP=1ffff110011c6f83 RSP=ffff888008e37c10 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffffffff818d9c06 R15=ffff88800db7ba00 RIP=ffffffff812e0146 RFL=00000046 [---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 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=00007f995ec8b970 CR3=0000000014682000 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=02729a5e042d21a1d2434b118cbc3b4d XMM02=000000000011da68eff9b2d0a8fce9cb XMM03=000000000011db382c67c8bc2e329bc3 XMM04=2464b7222c1067a900000000000ae988 XMM05=dfcdbad4f1609c370000000000131290 XMM06=ed1739f3cc4749e50000000000130468 XMM07=e042d86d42eb936e00000000001219f0 XMM08=443420113d446758000000000011db38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000