Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.111336] BUG: Bad rss-counter state mm:00000000f6482ddf type:MM_FILEPAGES val:33 [ 30.112398] BUG: Bad rss-counter state mm:00000000f6482ddf type:MM_ANONPAGES val:22 [ 30.264079] ================================================================== [ 30.264994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.265923] Read of size 8 at addr ffff8880165ddc20 by task sshd/220 [ 30.266709] [ 30.266931] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.267908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.268916] Call Trace: [ 30.269252] [ 30.269543] dump_stack_lvl+0x91/0xf0 [ 30.270042] print_report+0xcc/0x620 [ 30.270532] ? __virt_addr_valid+0x102/0x340 [ 30.271083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.271700] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.272322] kasan_report+0xbe/0xf0 [ 30.272803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.273422] vma_interval_tree_remove+0xc75/0xec0 [ 30.274028] vma_prepare+0xc54/0x11a0 [ 30.274517] __split_vma+0x5af/0x950 [ 30.274988] ? __pfx___split_vma+0x10/0x10 [ 30.275515] ? find_held_lock+0x2c/0x110 [ 30.276038] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.276611] ? lock_is_held_type+0x9f/0x120 [ 30.277144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.277751] ? mtree_range_walk+0x632/0x900 [ 30.278309] ? mas_walk+0x5c7/0x7c0 [ 30.278785] do_vmi_munmap+0x1f1/0x2b0 [ 30.279270] mmap_region+0x1f9/0x2660 [ 30.279749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.280271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.281009] ? __pfx_lock_acquire+0x10/0x10 [ 30.281543] ? __pfx_mmap_region+0x10/0x10 [ 30.282074] ? security_mmap_addr+0x7d/0xa0 [ 30.282599] ? get_unmapped_area+0x1f5/0x3f0 [ 30.283143] do_mmap+0x854/0xf00 [ 30.283583] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.284080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.284652] ksys_mmap_pgoff+0x3af/0x500 [ 30.285155] do_syscall_64+0x3f/0x90 [ 30.285635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286290] RIP: 0033:0x7fb1daa95d82 [ 30.286743] 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 [ 30.288883] RSP: 002b:00007ffd0612f878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.289783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1daa95d82 [ 30.290629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1d9ecf000 [ 30.291480] RBP: 00007fb1d9ecf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.292336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d63a366ec0 [ 30.293192] R13: 00007ffd0612f890 R14: 00007ffd0612f8c0 R15: 00007ffd0612fc20 [ 30.294046] [ 30.294336] [ 30.294550] Allocated by task 213: [ 30.294981] kasan_save_stack+0x22/0x50 [ 30.295484] kasan_set_track+0x25/0x30 [ 30.295975] __kasan_slab_alloc+0x59/0x70 [ 30.296513] kmem_cache_alloc+0x16b/0x370 [ 30.297029] vm_area_dup+0x20/0x160 [ 30.297481] __split_vma+0x170/0x950 [ 30.297942] split_vma+0xc6/0x110 [ 30.298381] mprotect_fixup+0x8d2/0xb30 [ 30.298883] do_mprotect_pkey+0x87e/0xd40 [ 30.299408] __x64_sys_mprotect+0x78/0xc0 [ 30.299927] do_syscall_64+0x3f/0x90 [ 30.300404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.301045] [ 30.301258] Freed by task 213: [ 30.301648] kasan_save_stack+0x22/0x50 [ 30.302151] kasan_set_track+0x25/0x30 [ 30.302650] kasan_save_free_info+0x2b/0x50 [ 30.303177] __kasan_slab_free+0x10a/0x190 [ 30.303711] kmem_cache_free+0x10d/0x4d0 [ 30.304234] rcu_core+0x8c8/0x2860 [ 30.304680] __do_softirq+0x1b7/0x7d4 [ 30.305156] [ 30.305377] Last potentially related work creation: [ 30.305963] kasan_save_stack+0x22/0x50 [ 30.306469] __kasan_record_aux_stack+0x8e/0xa0 [ 30.307039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.307685] remove_vma+0x139/0x170 [ 30.308134] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.308697] do_vmi_munmap+0x1f1/0x2b0 [ 30.309181] __vm_munmap+0x138/0x3a0 [ 30.309646] __x64_sys_munmap+0x59/0x80 [ 30.310144] do_syscall_64+0x3f/0x90 [ 30.310616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.311254] [ 30.311469] The buggy address belongs to the object at ffff8880165ddbc8 [ 30.311469] which belongs to the cache vm_area_struct of size 168 [ 30.312943] The buggy address is located 88 bytes inside of [ 30.312943] freed 168-byte region [ffff8880165ddbc8, ffff8880165ddc70) [ 30.314338] [ 30.314560] The buggy address belongs to the physical page: [ 30.315214] page:000000009705cbcd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165dd [ 30.316314] memcg:ffff88800df9e101 [ 30.316739] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.317434] page_type: 0xffffffff() [ 30.317888] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.318804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df9e101 [ 30.319701] page dumped because: kasan: bad access detected [ 30.320381] [ 30.320596] Memory state around the buggy address: [ 30.321176] ffff8880165ddb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.322024] ffff8880165ddb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.322890] >ffff8880165ddc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.323732] ^ [ 30.324274] ffff8880165ddc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.325121] ffff8880165ddd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.325969] ================================================================== [ 30.326931] Disabling lock debugging due to kernel taint [ 32.995043] BUG: Bad rss-counter state mm:0000000048aabe9e type:MM_FILEPAGES val:33 [ 32.996760] BUG: Bad rss-counter state mm:0000000048aabe9e type:MM_ANONPAGES val:22 [ 33.572278] BUG: Bad rss-counter state mm:000000007fed2d88 type:MM_FILEPAGES val:33 [ 33.573459] BUG: Bad rss-counter state mm:000000007fed2d88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4931' (ECDSA) to the list of known hosts. 2023/06/21 03:40:53 fuzzer started 2023/06/21 03:40:54 dialing manager at localhost:36067 2023/06/21 03:40:54 checking machine... 2023/06/21 03:40:54 checking revisions... [ 34.220460] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:40:54 testing simple program... [ 34.271268] cgroup: Unknown subsys name 'net' [ 34.327116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:40:53 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=1ffff1100206ef20 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff854ee9e0 RDI=ffffffff856f0da0 RBP=dffffc0000000000 RSP=ffff888010377900 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffff856f0da0 R13=ffffffff854ee9e0 R14=ffff888016a951d0 R15=ffff888016ab0000 RIP=ffffffff819677ef RFL=00000212 [----A--] 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 00007f5276f8a900 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=00007f52764a7020 CR3=000000000cbe8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=26694015eb36ea5c00000000000ae988 XMM05=e9e195440743e4ff0000000000131ec0 XMM06=dbd406e44526fed70000000000130f68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=000000000000000e RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000f RDI=ffff88801675fa70 RBP=dffffc0000000000 RSP=ffff88801675f970 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000f R13=0000000000000000 R14=ffff88801675fa00 R15=ffff888019821898 RIP=ffffffff813ad651 RFL=00000202 [-------] 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 00007fe28d967900 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=00007fe28df1e618 CR3=0000000017ec0000 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=563412feff00545000000000000080fe 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