[ 37.711163] BUG: Bad rss-counter state mm:000000008399f171 type:MM_FILEPAGES val:33 [ 37.712380] BUG: Bad rss-counter state mm:000000008399f171 type:MM_ANONPAGES val:22 [ 37.750651] ================================================================== [ 37.751560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.752490] Read of size 8 at addr ffff88800de97140 by task sshd/219 [ 37.753379] [ 37.753611] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.754486] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.755499] Call Trace: [ 37.755820] [ 37.756104] dump_stack_lvl+0x91/0xf0 [ 37.756589] print_report+0xcc/0x620 [ 37.757080] ? __virt_addr_valid+0x102/0x340 [ 37.757664] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.758285] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.758916] kasan_report+0xbe/0xf0 [ 37.759387] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.760011] vma_interval_tree_remove+0xc75/0xec0 [ 37.760610] vma_prepare+0xc54/0x11a0 [ 37.761098] __split_vma+0x5af/0x950 [ 37.761575] ? __pfx___split_vma+0x10/0x10 [ 37.762104] ? find_held_lock+0x2c/0x110 [ 37.762626] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.763191] ? lock_is_held_type+0x9f/0x120 [ 37.763726] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.764344] ? mtree_range_walk+0x632/0x900 [ 37.764892] ? mas_walk+0x5c7/0x7c0 [ 37.765368] do_vmi_munmap+0x1f1/0x2b0 [ 37.765890] mmap_region+0x1f9/0x2660 [ 37.766372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.766884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.767609] ? __pfx_lock_acquire+0x10/0x10 [ 37.768147] ? __pfx_mmap_region+0x10/0x10 [ 37.768674] ? security_mmap_addr+0x7d/0xa0 [ 37.769211] ? get_unmapped_area+0x1f5/0x3f0 [ 37.769790] do_mmap+0x854/0xf00 [ 37.770244] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.770741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.771304] ksys_mmap_pgoff+0x3af/0x500 [ 37.771817] do_syscall_64+0x3f/0x90 [ 37.772301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.772948] RIP: 0033:0x7f24b8c10d82 [ 37.773412] 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 [ 37.775549] RSP: 002b:00007ffea022f4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.776513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24b8c10d82 [ 37.777366] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24b804a000 [ 37.778252] RBP: 00007f24b804a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.779101] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6185e3ec0 [ 37.779946] R13: 00007ffea022f4e0 R14: 00007ffea022f510 R15: 00007ffea022f870 [ 37.780813] [ 37.781112] [ 37.781326] Allocated by task 212: [ 37.781762] kasan_save_stack+0x22/0x50 [ 37.782268] kasan_set_track+0x25/0x30 [ 37.782763] __kasan_slab_alloc+0x59/0x70 [ 37.783287] kmem_cache_alloc+0x16b/0x370 [ 37.783808] vm_area_dup+0x20/0x160 [ 37.784265] __split_vma+0x170/0x950 [ 37.784734] split_vma+0xc6/0x110 [ 37.785180] mprotect_fixup+0x8d2/0xb30 [ 37.785689] do_mprotect_pkey+0x87e/0xd40 [ 37.786221] __x64_sys_mprotect+0x78/0xc0 [ 37.786745] do_syscall_64+0x3f/0x90 [ 37.787222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.787866] [ 37.788082] Freed by task 212: [ 37.788487] kasan_save_stack+0x22/0x50 [ 37.788999] kasan_set_track+0x25/0x30 [ 37.789514] kasan_save_free_info+0x2b/0x50 [ 37.790056] __kasan_slab_free+0x10a/0x190 [ 37.790599] kmem_cache_free+0x10d/0x4d0 [ 37.791111] rcu_core+0x8c8/0x2860 [ 37.791559] __do_softirq+0x1b7/0x7d4 [ 37.792040] [ 37.792256] Last potentially related work creation: [ 37.792870] kasan_save_stack+0x22/0x50 [ 37.793371] __kasan_record_aux_stack+0x8e/0xa0 [ 37.793957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.794610] remove_vma+0x139/0x170 [ 37.795064] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.795627] do_vmi_munmap+0x1f1/0x2b0 [ 37.796114] __vm_munmap+0x138/0x3a0 [ 37.796582] __x64_sys_munmap+0x59/0x80 [ 37.797086] do_syscall_64+0x3f/0x90 [ 37.797564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.798209] [ 37.798422] The buggy address belongs to the object at ffff88800de970e8 [ 37.798422] which belongs to the cache vm_area_struct of size 168 [ 37.799894] The buggy address is located 88 bytes inside of [ 37.799894] freed 168-byte region [ffff88800de970e8, ffff88800de97190) [ 37.801295] [ 37.801531] The buggy address belongs to the physical page: [ 37.802190] page:00000000bb14cae0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde97 [ 37.803283] memcg:ffff88800bf38501 [ 37.803707] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.804415] page_type: 0xffffffff() [ 37.804864] raw: 0100000000000200 ffff88800879fc80 ffffea00003a7f40 dead000000000005 [ 37.805804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf38501 [ 37.806712] page dumped because: kasan: bad access detected [ 37.807376] [ 37.807592] Memory state around the buggy address: [ 37.808180] ffff88800de97000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.809032] ffff88800de97080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 37.809907] >ffff88800de97100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.810767] ^ [ 37.811402] ffff88800de97180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 37.812253] ffff88800de97200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 37.813102] ================================================================== [ 37.814127] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.687838] BUG: Bad rss-counter state mm:000000003703027c type:MM_FILEPAGES val:33 [ 39.689382] BUG: Bad rss-counter state mm:000000003703027c type:MM_ANONPAGES val:22 [ 40.276161] BUG: Bad rss-counter state mm:000000007125c0d0 type:MM_FILEPAGES val:33 [ 40.277357] BUG: Bad rss-counter state mm:000000007125c0d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19233' (ECDSA) to the list of known hosts. 2023/06/19 17:56:47 fuzzer started 2023/06/19 17:56:48 dialing manager at localhost:44161 2023/06/19 17:56:48 checking machine... 2023/06/19 17:56:48 checking revisions... [ 40.925553] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:56:48 testing simple program... [ 40.968890] cgroup: Unknown subsys name 'net' [ 41.009746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016770800 RCX=0000000000010000 RDX=1ffff110033c3e22 RSI=0000000000000002 RDI=ffff888019e1f110 RBP=ffff888016489b40 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=00000000000f4240 R13=0000000000000002 R14=ffff888019e1f000 R15=dffffc0000000000 RIP=ffffffff812993eb 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 00007f69730f6900 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=00007f69736ad618 CR3=000000001c95a000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f840939b540 CR3=000000000c812000 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=60cf2eb874bf698ee84acd6c18195711 XMM02=000000000011d298ec2efd57dc4c00df XMM03=0000000000123d180cc3f1e246229cb1 XMM04=15498a74fefaee9900000000000ae988 XMM05=dfcdbad4f1609c370000000000133658 XMM06=806171799158d96700000000001334e0 XMM07=e042d86d42eb936e0000000000123ff0 XMM08=0cc3f1e246229cb1000000000011d2f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000