syzkaller login: [ 31.004670] sshd (211) used greatest stack depth: 24088 bytes left [ 31.007149] BUG: Bad rss-counter state mm:00000000b8a46d5e type:MM_FILEPAGES val:33 [ 31.008253] BUG: Bad rss-counter state mm:00000000b8a46d5e type:MM_ANONPAGES val:22 [ 31.169879] ================================================================== [ 31.170814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.171760] Read of size 8 at addr ffff88800e248a50 by task sshd/218 [ 31.172529] [ 31.172747] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.173788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.174774] Call Trace: [ 31.175095] [ 31.175400] dump_stack_lvl+0x91/0xf0 [ 31.175901] print_report+0xcc/0x620 [ 31.176385] ? __virt_addr_valid+0x102/0x340 [ 31.176936] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.177549] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.178167] kasan_report+0xbe/0xf0 [ 31.178639] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.179268] vma_interval_tree_remove+0xc75/0xec0 [ 31.179881] vma_prepare+0xc54/0x11a0 [ 31.180378] __split_vma+0x5af/0x950 [ 31.180862] ? __pfx___split_vma+0x10/0x10 [ 31.181397] ? find_held_lock+0x2c/0x110 [ 31.181926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.182493] ? lock_is_held_type+0x9f/0x120 [ 31.183040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.183668] ? mtree_range_walk+0x632/0x900 [ 31.184228] ? mas_walk+0x5c7/0x7c0 [ 31.184707] do_vmi_munmap+0x1f1/0x2b0 [ 31.185203] mmap_region+0x1f9/0x2660 [ 31.185682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.186190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.186899] ? __pfx_lock_acquire+0x10/0x10 [ 31.187427] ? __pfx_mmap_region+0x10/0x10 [ 31.187969] ? security_mmap_addr+0x7d/0xa0 [ 31.188495] ? get_unmapped_area+0x1f5/0x3f0 [ 31.189048] do_mmap+0x854/0xf00 [ 31.189490] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.189987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.190552] ksys_mmap_pgoff+0x3af/0x500 [ 31.191058] do_syscall_64+0x3f/0x90 [ 31.191541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192211] RIP: 0033:0x7f9d1ba37d82 [ 31.192666] 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 [ 31.194812] RSP: 002b:00007ffe34ecf988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.195727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d1ba37d82 [ 31.196572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d1ae71000 [ 31.197419] RBP: 00007f9d1ae71000 R08: 0000000000000009 R09: 0000000000001000 [ 31.198267] R10: 0000000000000812 R11: 0000000000000206 R12: 000056321cf8fec0 [ 31.199128] R13: 00007ffe34ecf9a0 R14: 00007ffe34ecf9d0 R15: 00007ffe34ecfd30 [ 31.200000] [ 31.200292] [ 31.200507] Allocated by task 211: [ 31.200936] kasan_save_stack+0x22/0x50 [ 31.201448] kasan_set_track+0x25/0x30 [ 31.201940] __kasan_slab_alloc+0x59/0x70 [ 31.202463] kmem_cache_alloc+0x16b/0x370 [ 31.202980] vm_area_dup+0x20/0x160 [ 31.203439] __split_vma+0x170/0x950 [ 31.203920] split_vma+0xc6/0x110 [ 31.204366] mprotect_fixup+0x8d2/0xb30 [ 31.204878] do_mprotect_pkey+0x87e/0xd40 [ 31.205393] __x64_sys_mprotect+0x78/0xc0 [ 31.205910] do_syscall_64+0x3f/0x90 [ 31.206386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207029] [ 31.207245] Freed by task 211: [ 31.207646] kasan_save_stack+0x22/0x50 [ 31.208150] kasan_set_track+0x25/0x30 [ 31.208640] kasan_save_free_info+0x2b/0x50 [ 31.209174] __kasan_slab_free+0x10a/0x190 [ 31.209702] kmem_cache_free+0x10d/0x4d0 [ 31.210209] rcu_core+0x8c8/0x2860 [ 31.210654] __do_softirq+0x1b7/0x7d4 [ 31.211133] [ 31.211348] Last potentially related work creation: [ 31.211935] kasan_save_stack+0x22/0x50 [ 31.212437] __kasan_record_aux_stack+0x8e/0xa0 [ 31.213012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.213661] remove_vma+0x139/0x170 [ 31.214113] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.214754] do_vmi_munmap+0x1f1/0x2b0 [ 31.215245] __vm_munmap+0x138/0x3a0 [ 31.215730] __x64_sys_munmap+0x59/0x80 [ 31.216228] do_syscall_64+0x3f/0x90 [ 31.216707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217348] [ 31.217563] The buggy address belongs to the object at ffff88800e2489f8 [ 31.217563] which belongs to the cache vm_area_struct of size 168 [ 31.219039] The buggy address is located 88 bytes inside of [ 31.219039] freed 168-byte region [ffff88800e2489f8, ffff88800e248aa0) [ 31.220472] [ 31.220690] The buggy address belongs to the physical page: [ 31.221356] page:00000000b33c3c79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe248 [ 31.222443] memcg:ffff88800db04c01 [ 31.222872] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.223515] page_type: 0xffffffff() [ 31.223988] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.224920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db04c01 [ 31.225829] page dumped because: kasan: bad access detected [ 31.226493] [ 31.226708] Memory state around the buggy address: [ 31.227289] ffff88800e248900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.228164] ffff88800e248980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.229027] >ffff88800e248a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.229882] ^ [ 31.230579] ffff88800e248a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.231443] ffff88800e248b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.232301] ================================================================== [ 31.233296] Disabling lock debugging due to kernel taint [ 33.327662] BUG: Bad rss-counter state mm:00000000851d4fc8 type:MM_FILEPAGES val:33 [ 33.328887] BUG: Bad rss-counter state mm:00000000851d4fc8 type:MM_ANONPAGES val:22 [ 33.725846] BUG: Bad rss-counter state mm:00000000cdfb0f58 type:MM_FILEPAGES val:33 [ 33.727136] BUG: Bad rss-counter state mm:00000000cdfb0f58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54981' (ECDSA) to the list of known hosts. 2023/06/21 10:30:10 fuzzer started 2023/06/21 10:30:11 dialing manager at localhost:36067 2023/06/21 10:30:11 checking machine... 2023/06/21 10:30:11 checking revisions... [ 34.476433] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:30:11 testing simple program... [ 34.535716] cgroup: Unknown subsys name 'net' [ 34.595171] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:30:10 Registers: info registers vcpu 0 RAX=1ffffffff0bf4adc RBX=ffffffff85fa56e4 RCX=ffffffff83640611 RDX=0000000000000000 RSI=ffffffff863b40b2 RDI=ffffffff85fa56e0 RBP=ffffffff85fa56e0 RSP=ffff88806ce099c0 R8 =ffffffff863b40b2 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008ab47 R12=ffffffff85fa56e8 R13=ffffffff85fa56e0 R14=ffffffff85fa56e0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007ffa29fa3700 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=00007f4f14d2c650 CR3=000000000f3ea000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38313832342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383138 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=ffff88800bbf0000 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800bbf0098 RSP=ffff888008e4f7c8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000128 R12=000000000001c060 R13=ffff88800bbf01a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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=00007f667dfe8ee0 CR3=000000000f052000 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=834900f4e68edba1e640f3b96f704f2c XMM02=000000000011b6a8d59e07bde36eea69 XMM03=000000000011b7d0ec2efd57dc4c00df XMM04=40d09dc9fa4ea19e00000000000ae988 XMM05=c7aeeac609d4d7d60000000000132bb0 XMM06=bdf2e299e47b49d50000000000131630 XMM07=fb795ef6d657705600000000001219d8 XMM08=2c67c8bc2e329bc3000000000011b7d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000