[ 36.109998] BUG: Bad rss-counter state mm:00000000556b5d72 type:MM_FILEPAGES val:33 [ 36.111379] BUG: Bad rss-counter state mm:00000000556b5d72 type:MM_ANONPAGES val:22 [ 36.253962] ================================================================== [ 36.254872] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.255815] Read of size 8 at addr ffff88800fd1a798 by task sshd/220 [ 36.256597] [ 36.256819] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.257878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.258871] Call Trace: [ 36.259191] [ 36.259481] dump_stack_lvl+0x91/0xf0 [ 36.259989] print_report+0xcc/0x620 [ 36.260485] ? __virt_addr_valid+0x102/0x340 [ 36.261051] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.261705] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.262322] kasan_report+0xbe/0xf0 [ 36.262806] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.263423] vma_interval_tree_remove+0xc75/0xec0 [ 36.264020] vma_prepare+0xc54/0x11a0 [ 36.264498] __split_vma+0x5af/0x950 [ 36.264982] ? __pfx___split_vma+0x10/0x10 [ 36.265517] ? find_held_lock+0x2c/0x110 [ 36.266041] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.266617] ? lock_is_held_type+0x9f/0x120 [ 36.267165] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.267770] ? mtree_range_walk+0x632/0x900 [ 36.268316] ? mas_walk+0x5c7/0x7c0 [ 36.268785] do_vmi_munmap+0x1f1/0x2b0 [ 36.269305] mmap_region+0x1f9/0x2660 [ 36.269789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.270310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.271038] ? __pfx_lock_acquire+0x10/0x10 [ 36.271577] ? __pfx_mmap_region+0x10/0x10 [ 36.272121] ? security_mmap_addr+0x7d/0xa0 [ 36.272679] ? get_unmapped_area+0x1f5/0x3f0 [ 36.273262] do_mmap+0x854/0xf00 [ 36.273710] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.274206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.274788] ksys_mmap_pgoff+0x3af/0x500 [ 36.275309] do_syscall_64+0x3f/0x90 [ 36.275788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.276441] RIP: 0033:0x7f505360cd82 [ 36.276902] 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 [ 36.279090] RSP: 002b:00007ffe363b9848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.280019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f505360cd82 [ 36.280862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5052a46000 [ 36.281730] RBP: 00007f5052a46000 R08: 0000000000000009 R09: 0000000000001000 [ 36.282583] R10: 0000000000000812 R11: 0000000000000206 R12: 000055afb5edbec0 [ 36.283445] R13: 00007ffe363b9860 R14: 00007ffe363b9890 R15: 00007ffe363b9bf0 [ 36.284311] [ 36.284611] [ 36.284833] Allocated by task 213: [ 36.285284] kasan_save_stack+0x22/0x50 [ 36.285793] kasan_set_track+0x25/0x30 [ 36.286299] __kasan_slab_alloc+0x59/0x70 [ 36.286823] kmem_cache_alloc+0x16b/0x370 [ 36.287354] vm_area_dup+0x20/0x160 [ 36.287816] __split_vma+0x170/0x950 [ 36.288286] split_vma+0xc6/0x110 [ 36.288728] mprotect_fixup+0x8d2/0xb30 [ 36.289242] do_mprotect_pkey+0x87e/0xd40 [ 36.289758] __x64_sys_mprotect+0x78/0xc0 [ 36.290289] do_syscall_64+0x3f/0x90 [ 36.290759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.291403] [ 36.291622] Freed by task 19: [ 36.292008] kasan_save_stack+0x22/0x50 [ 36.292533] kasan_set_track+0x25/0x30 [ 36.293028] kasan_save_free_info+0x2b/0x50 [ 36.293589] __kasan_slab_free+0x10a/0x190 [ 36.294133] kmem_cache_free+0x10d/0x4d0 [ 36.294639] rcu_core+0x8c8/0x2860 [ 36.295090] __do_softirq+0x1b7/0x7d4 [ 36.295573] [ 36.295787] Last potentially related work creation: [ 36.296381] kasan_save_stack+0x22/0x50 [ 36.296890] __kasan_record_aux_stack+0x8e/0xa0 [ 36.297473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.298156] remove_vma+0x139/0x170 [ 36.298625] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.299190] do_vmi_munmap+0x1f1/0x2b0 [ 36.299674] __vm_munmap+0x138/0x3a0 [ 36.300150] __x64_sys_munmap+0x59/0x80 [ 36.300650] do_syscall_64+0x3f/0x90 [ 36.301142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.301778] [ 36.301993] The buggy address belongs to the object at ffff88800fd1a740 [ 36.301993] which belongs to the cache vm_area_struct of size 168 [ 36.303462] The buggy address is located 88 bytes inside of [ 36.303462] freed 168-byte region [ffff88800fd1a740, ffff88800fd1a7e8) [ 36.304874] [ 36.305101] The buggy address belongs to the physical page: [ 36.305769] page:0000000099a11da8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1a [ 36.306850] memcg:ffff88800f29ac01 [ 36.307279] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.307979] page_type: 0xffffffff() [ 36.308452] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2780 000000000000000b [ 36.309392] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f29ac01 [ 36.310298] page dumped because: kasan: bad access detected [ 36.310960] [ 36.311176] Memory state around the buggy address: [ 36.311759] ffff88800fd1a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.312636] ffff88800fd1a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.313519] >ffff88800fd1a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.314370] ^ [ 36.314871] ffff88800fd1a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.315738] ffff88800fd1a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.316605] ================================================================== [ 36.317635] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.292825] BUG: Bad rss-counter state mm:00000000b622561f type:MM_FILEPAGES val:33 [ 38.294124] BUG: Bad rss-counter state mm:00000000b622561f type:MM_ANONPAGES val:22 [ 38.740964] BUG: Bad rss-counter state mm:000000000fa5f659 type:MM_FILEPAGES val:33 [ 38.742210] BUG: Bad rss-counter state mm:000000000fa5f659 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9183' (ECDSA) to the list of known hosts. 2023/06/20 06:03:09 fuzzer started 2023/06/20 06:03:09 dialing manager at localhost:44161 2023/06/20 06:03:09 checking machine... 2023/06/20 06:03:09 checking revisions... [ 39.460913] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:03:09 testing simple program... [ 39.503153] cgroup: Unknown subsys name 'net' [ 39.552372] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff84530871 RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88806ce09c90 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=ffffed100d9c1393 RIP=ffffffff84530891 RFL=00000086 [--S--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 00007fd71b798700 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=00007fc72762e3b0 CR3=000000000ee72000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039303a3330 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303337 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171ac05 RDX=ffff8880181151c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800f0bf0e8 RSP=ffff8880181efe70 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000100073 R13=00007f2fe935a044 R14=ffff88800f0bf0f8 R15=0000000000000000 RIP=ffffffff814c0388 RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2fe8806900 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=00007f2fe935a044 CR3=000000001bc62000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=8ce593a6b919db3e84d994320dee8f2d XMM04=8eeaae8e8c14f6eded7098da15f3c007 XMM05=00000000000000000000000000000000 XMM06=8ce5938e8c14db3e847094320dee8f07 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000