syzkaller login: [ 46.617255] BUG: Bad rss-counter state mm:00000000a1ce3d91 type:MM_FILEPAGES val:33 [ 46.617916] BUG: Bad rss-counter state mm:00000000a1ce3d91 type:MM_ANONPAGES val:22 [ 46.780999] ================================================================== [ 46.782070] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.783295] Read of size 8 at addr ffff88800df47058 by task sshd/220 [ 46.784268] [ 46.784484] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.785353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.786357] Call Trace: [ 46.786674] [ 46.786962] dump_stack_lvl+0x91/0xf0 [ 46.787454] print_report+0xcc/0x620 [ 46.787965] ? __virt_addr_valid+0x102/0x340 [ 46.788520] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.789145] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.789757] kasan_report+0xbe/0xf0 [ 46.790231] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.790869] vma_interval_tree_remove+0xc75/0xec0 [ 46.791496] vma_prepare+0xc54/0x11a0 [ 46.792029] __split_vma+0x5af/0x950 [ 46.792514] ? __pfx___split_vma+0x10/0x10 [ 46.793061] ? find_held_lock+0x2c/0x110 [ 46.793597] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.794184] ? lock_is_held_type+0x9f/0x120 [ 46.794746] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.795368] ? mtree_range_walk+0x632/0x900 [ 46.795960] ? mas_walk+0x5c7/0x7c0 [ 46.796449] do_vmi_munmap+0x1f1/0x2b0 [ 46.796962] mmap_region+0x1f9/0x2660 [ 46.797456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.797984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.798731] ? __pfx_lock_acquire+0x10/0x10 [ 46.799286] ? __pfx_mmap_region+0x10/0x10 [ 46.799866] ? security_mmap_addr+0x7d/0xa0 [ 46.800422] ? get_unmapped_area+0x1f5/0x3f0 [ 46.800987] do_mmap+0x854/0xf00 [ 46.801436] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.801944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.802527] ksys_mmap_pgoff+0x3af/0x500 [ 46.803047] do_syscall_64+0x3f/0x90 [ 46.803542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.804235] RIP: 0033:0x7fefe0af7d82 [ 46.804719] 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 [ 46.806930] RSP: 002b:00007ffef586c798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.807887] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefe0af7d82 [ 46.808770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefdff31000 [ 46.809648] RBP: 00007fefdff31000 R08: 0000000000000009 R09: 0000000000001000 [ 46.810518] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0b6ca0f70 [ 46.811401] R13: 00007ffef586c7b0 R14: 00007ffef586c7e0 R15: 00007ffef586cb40 [ 46.812333] [ 46.812643] [ 46.812864] Allocated by task 213: [ 46.813303] kasan_save_stack+0x22/0x50 [ 46.813827] kasan_set_track+0x25/0x30 [ 46.814335] __kasan_slab_alloc+0x59/0x70 [ 46.814875] kmem_cache_alloc+0x16b/0x370 [ 46.815415] vm_area_dup+0x20/0x160 [ 46.815907] __split_vma+0x170/0x950 [ 46.816396] split_vma+0xc6/0x110 [ 46.816858] mprotect_fixup+0x8d2/0xb30 [ 46.817375] do_mprotect_pkey+0x87e/0xd40 [ 46.817910] __x64_sys_mprotect+0x78/0xc0 [ 46.818450] do_syscall_64+0x3f/0x90 [ 46.818938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.819596] [ 46.819835] Freed by task 19: [ 46.820235] kasan_save_stack+0x22/0x50 [ 46.820760] kasan_set_track+0x25/0x30 [ 46.821263] kasan_save_free_info+0x2b/0x50 [ 46.821819] __kasan_slab_free+0x10a/0x190 [ 46.822373] kmem_cache_free+0x10d/0x4d0 [ 46.822892] rcu_core+0x8c8/0x2860 [ 46.823350] __do_softirq+0x1b7/0x7d4 [ 46.823873] [ 46.824137] Last potentially related work creation: [ 46.824748] kasan_save_stack+0x22/0x50 [ 46.825269] __kasan_record_aux_stack+0x8e/0xa0 [ 46.825856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.826521] remove_vma+0x139/0x170 [ 46.826988] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.827562] do_vmi_munmap+0x1f1/0x2b0 [ 46.828089] __vm_munmap+0x138/0x3a0 [ 46.828576] __x64_sys_munmap+0x59/0x80 [ 46.829088] do_syscall_64+0x3f/0x90 [ 46.829578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.830233] [ 46.830455] Second to last potentially related work creation: [ 46.831170] kasan_save_stack+0x22/0x50 [ 46.831686] __kasan_record_aux_stack+0x8e/0xa0 [ 46.832318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.832979] remove_vma+0x139/0x170 [ 46.833448] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.834026] do_vmi_munmap+0x1f1/0x2b0 [ 46.834538] mmap_region+0x1f9/0x2660 [ 46.835034] do_mmap+0x854/0xf00 [ 46.835475] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.836015] ksys_mmap_pgoff+0x3af/0x500 [ 46.836534] do_syscall_64+0x3f/0x90 [ 46.837029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.837698] [ 46.837918] The buggy address belongs to the object at ffff88800df47000 [ 46.837918] which belongs to the cache vm_area_struct of size 168 [ 46.839435] The buggy address is located 88 bytes inside of [ 46.839435] freed 168-byte region [ffff88800df47000, ffff88800df470a8) [ 46.840926] [ 46.841146] The buggy address belongs to the physical page: [ 46.841828] page:0000000031bda1a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf47 [ 46.842940] memcg:ffff88800975b301 [ 46.843378] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.844076] page_type: 0xffffffff() [ 46.844541] raw: 0100000000000200 ffff88800879fc80 ffffea000031fc00 dead000000000004 [ 46.845498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800975b301 [ 46.846436] page dumped because: kasan: bad access detected [ 46.847121] [ 46.847344] Memory state around the buggy address: [ 46.848082] ffff88800df46f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 46.849180] ffff88800df46f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.850280] >ffff88800df47000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.851371] ^ [ 46.852351] ffff88800df47080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 46.853455] ffff88800df47100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.854543] ================================================================== [ 46.855723] Disabling lock debugging due to kernel taint [ 48.837561] BUG: Bad rss-counter state mm:000000007f2c0327 type:MM_FILEPAGES val:33 [ 48.838412] BUG: Bad rss-counter state mm:000000007f2c0327 type:MM_ANONPAGES val:22 [ 49.285230] BUG: Bad rss-counter state mm:000000006f4060f6 type:MM_FILEPAGES val:33 [ 49.286208] BUG: Bad rss-counter state mm:000000006f4060f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43798' (ECDSA) to the list of known hosts. 2023/06/20 04:48:03 fuzzer started 2023/06/20 04:48:04 dialing manager at localhost:44161 2023/06/20 04:48:04 checking machine... 2023/06/20 04:48:04 checking revisions... [ 50.068030] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:48:04 testing simple program... [ 50.120839] cgroup: Unknown subsys name 'net' [ 50.174051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a5b680 RSI=ffffffff813909ea RDI=0000000000000004 RBP=ffff888016297f58 RSP=ffff888016297f28 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888016297f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812ddc4e 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 00007fd45c037700 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=00007fc8521040b0 CR3=000000000c94c000 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=38343a3430203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343837 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=ffffffff8180eeb2 RBX=ffffffff85dfcf2c RCX=ffffffff8180ee7d RDX=0000000000000000 RSI=ffffffff86137cac RDI=ffffffff85dfcf14 RBP=ffffffff85dfcf14 RSP=ffff88806cf09988 R8 =ffffffff86137cac R9 =ffff88806cf09a80 R10=0000000000038001 R11=0000000000020ed0 R12=ffffffff85dfcf44 R13=ffffffff85dfcf14 R14=ffffffff85dfcf14 R15=dffffc0000000000 RIP=ffffffff8112fc96 RFL=00000297 [--S-APC] 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=00007f8377760f90 CR3=000000000c554000 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=74df19a0895de9838d48ff549d68235a XMM02=000000000011d4e0eff9b2d0a8fce9cb XMM03=000000000011d5b02c67c8bc2e329bc3 XMM04=ae17ee032042ab6700000000000ae988 XMM05=19e9129bd510f23500000000001358e0 XMM06=8f7f4e26b42a60090000000000134748 XMM07=e042d86d42eb936e0000000000124ca8 XMM08=3858e6376909cd43000000000011d5b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000