syzkaller login: [ 32.063258] BUG: Bad rss-counter state mm:000000009be3ce25 type:MM_FILEPAGES val:33 [ 32.064353] BUG: Bad rss-counter state mm:000000009be3ce25 type:MM_ANONPAGES val:22 [ 32.234406] ================================================================== [ 32.235565] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.236901] Read of size 8 at addr ffff88800ee3a3f8 by task sshd/220 [ 32.237751] [ 32.237990] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.238960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.240031] Call Trace: [ 32.240377] [ 32.240688] dump_stack_lvl+0x91/0xf0 [ 32.241224] print_report+0xcc/0x620 [ 32.241753] ? __virt_addr_valid+0x102/0x340 [ 32.242353] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.243048] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.243723] kasan_report+0xbe/0xf0 [ 32.244241] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.244919] vma_interval_tree_remove+0xc75/0xec0 [ 32.245575] vma_prepare+0xc54/0x11a0 [ 32.246098] __split_vma+0x5af/0x950 [ 32.246634] ? __pfx___split_vma+0x10/0x10 [ 32.247213] ? find_held_lock+0x2c/0x110 [ 32.247784] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.248405] ? lock_is_held_type+0x9f/0x120 [ 32.248996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.249658] ? mtree_range_walk+0x632/0x900 [ 32.250261] ? mas_walk+0x5c7/0x7c0 [ 32.250793] do_vmi_munmap+0x1f1/0x2b0 [ 32.251331] mmap_region+0x1f9/0x2660 [ 32.251861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.252417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.253203] ? __pfx_lock_acquire+0x10/0x10 [ 32.253787] ? __pfx_mmap_region+0x10/0x10 [ 32.254365] ? security_mmap_addr+0x7d/0xa0 [ 32.254965] ? get_unmapped_area+0x1f5/0x3f0 [ 32.255566] do_mmap+0x854/0xf00 [ 32.256054] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.256596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.257212] ksys_mmap_pgoff+0x3af/0x500 [ 32.257764] do_syscall_64+0x3f/0x90 [ 32.258288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.259002] RIP: 0033:0x7fe9e372dd82 [ 32.259502] 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 [ 32.261828] RSP: 002b:00007ffed573dfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.262826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9e372dd82 [ 32.263751] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9e2b67000 [ 32.264680] RBP: 00007fe9e2b67000 R08: 0000000000000009 R09: 0000000000001000 [ 32.265614] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6f300cf60 [ 32.266564] R13: 00007ffed573e000 R14: 00007ffed573e030 R15: 00007ffed573e390 [ 32.267500] [ 32.267821] [ 32.268054] Allocated by task 213: [ 32.268524] kasan_save_stack+0x22/0x50 [ 32.269076] kasan_set_track+0x25/0x30 [ 32.269614] __kasan_slab_alloc+0x59/0x70 [ 32.270187] kmem_cache_alloc+0x16b/0x370 [ 32.270763] vm_area_dup+0x20/0x160 [ 32.271258] __split_vma+0x170/0x950 [ 32.271768] split_vma+0xc6/0x110 [ 32.272247] mprotect_fixup+0x8d2/0xb30 [ 32.272796] do_mprotect_pkey+0x87e/0xd40 [ 32.273364] __x64_sys_mprotect+0x78/0xc0 [ 32.273931] do_syscall_64+0x3f/0x90 [ 32.274469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.275175] [ 32.275411] Freed by task 213: [ 32.275840] kasan_save_stack+0x22/0x50 [ 32.276392] kasan_set_track+0x25/0x30 [ 32.276934] kasan_save_free_info+0x2b/0x50 [ 32.277515] __kasan_slab_free+0x10a/0x190 [ 32.278179] kmem_cache_free+0x10d/0x4d0 [ 32.278745] rcu_core+0x8c8/0x2860 [ 32.279231] __do_softirq+0x1b7/0x7d4 [ 32.279750] [ 32.279983] Last potentially related work creation: [ 32.280622] kasan_save_stack+0x22/0x50 [ 32.281175] __kasan_record_aux_stack+0x8e/0xa0 [ 32.281800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.282506] remove_vma+0x139/0x170 [ 32.282996] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.283601] do_vmi_munmap+0x1f1/0x2b0 [ 32.284135] __vm_munmap+0x138/0x3a0 [ 32.284642] __x64_sys_munmap+0x59/0x80 [ 32.285183] do_syscall_64+0x3f/0x90 [ 32.285701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.286400] [ 32.286654] Second to last potentially related work creation: [ 32.287399] kasan_save_stack+0x22/0x50 [ 32.287949] __kasan_record_aux_stack+0x8e/0xa0 [ 32.288572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.289274] remove_vma+0x139/0x170 [ 32.289762] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.290370] do_vmi_munmap+0x1f1/0x2b0 [ 32.290909] mmap_region+0x1f9/0x2660 [ 32.291427] do_mmap+0x854/0xf00 [ 32.291898] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.292433] ksys_mmap_pgoff+0x3af/0x500 [ 32.292975] do_syscall_64+0x3f/0x90 [ 32.293497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.294202] [ 32.294436] The buggy address belongs to the object at ffff88800ee3a3a0 [ 32.294436] which belongs to the cache vm_area_struct of size 168 [ 32.296070] The buggy address is located 88 bytes inside of [ 32.296070] freed 168-byte region [ffff88800ee3a3a0, ffff88800ee3a448) [ 32.297606] [ 32.297842] The buggy address belongs to the physical page: [ 32.298583] page:000000006d8a9a1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee3a [ 32.299777] memcg:ffff88800e6f8b01 [ 32.300243] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.300951] page_type: 0xffffffff() [ 32.301446] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 32.302463] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6f8b01 [ 32.303464] page dumped because: kasan: bad access detected [ 32.304192] [ 32.304425] Memory state around the buggy address: [ 32.305065] ffff88800ee3a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.305999] ffff88800ee3a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.306952] >ffff88800ee3a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.307879] ^ [ 32.308800] ffff88800ee3a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.309738] ffff88800ee3a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.310683] ================================================================== [ 32.311729] Disabling lock debugging due to kernel taint [ 34.821014] BUG: Bad rss-counter state mm:00000000ad6d31aa type:MM_FILEPAGES val:33 [ 34.821987] BUG: Bad rss-counter state mm:00000000ad6d31aa type:MM_ANONPAGES val:22 [ 35.319672] BUG: Bad rss-counter state mm:00000000f0fbdc4c type:MM_FILEPAGES val:33 [ 35.321008] BUG: Bad rss-counter state mm:00000000f0fbdc4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38533' (ECDSA) to the list of known hosts. 2023/06/20 17:04:32 fuzzer started 2023/06/20 17:04:32 dialing manager at localhost:36067 2023/06/20 17:04:32 checking machine... 2023/06/20 17:04:32 checking revisions... [ 36.061064] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:04:32 testing simple program... [ 36.108074] cgroup: Unknown subsys name 'net' [ 36.156957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:31 Registers: info registers vcpu 0 RAX=000000000eac5cde RBX=0000000057aa9dab RCX=ffff888014767618 RDX=0000000000000012 RSI=000000000000000c RDI=0000000003c55d96 RBP=0000000000000000 RSP=ffff888014767550 R8 =000000000eac5cde R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=ffff8880147675b8 R15=0000000000000012 RIP=ffffffff822704a0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f29d05f7900 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=00007f29cfa077e0 CR3=000000000ed34000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d1fb5a1035533d5500000000000ae988 XMM05=4e393ca10d9d8cb70000000000134350 XMM06=4fda316b135da52b0000000000133140 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801589b680 RSI=ffffffff8198f6fe RDI=ffffffff87f37488 RBP=ffff888019357828 RSP=ffff888015887b80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019357578 R13=ffff888019357568 R14=ffff888019357448 R15=ffff888019357498 RIP=ffffffff814c086b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5200da3900 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=00007ffe63e2c000 CR3=000000000e6b0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000