syzkaller login: [ 31.482079] BUG: Bad rss-counter state mm:00000000deabbac5 type:MM_FILEPAGES val:33 [ 31.483277] BUG: Bad rss-counter state mm:00000000deabbac5 type:MM_ANONPAGES val:22 [ 31.651402] ================================================================== [ 31.652330] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.653292] Read of size 8 at addr ffff888006a11140 by task sshd/220 [ 31.654082] [ 31.654306] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.655167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.656173] Call Trace: [ 31.656504] [ 31.656806] dump_stack_lvl+0x91/0xf0 [ 31.657299] print_report+0xcc/0x620 [ 31.657786] ? __virt_addr_valid+0x102/0x340 [ 31.658364] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658996] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659627] kasan_report+0xbe/0xf0 [ 31.660121] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.660789] vma_interval_tree_remove+0xc75/0xec0 [ 31.661400] vma_prepare+0xc54/0x11a0 [ 31.661880] __split_vma+0x5af/0x950 [ 31.662361] ? __pfx___split_vma+0x10/0x10 [ 31.662897] ? find_held_lock+0x2c/0x110 [ 31.663430] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.663996] ? lock_is_held_type+0x9f/0x120 [ 31.664551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.665172] ? mtree_range_walk+0x632/0x900 [ 31.665733] ? mas_walk+0x5c7/0x7c0 [ 31.666222] do_vmi_munmap+0x1f1/0x2b0 [ 31.666722] mmap_region+0x1f9/0x2660 [ 31.667215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.667726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.668452] ? __pfx_lock_acquire+0x10/0x10 [ 31.669010] ? __pfx_mmap_region+0x10/0x10 [ 31.669544] ? security_mmap_addr+0x7d/0xa0 [ 31.670084] ? get_unmapped_area+0x1f5/0x3f0 [ 31.670641] do_mmap+0x854/0xf00 [ 31.671084] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.671584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.672158] ksys_mmap_pgoff+0x3af/0x500 [ 31.672681] do_syscall_64+0x3f/0x90 [ 31.673172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.673828] RIP: 0033:0x7fa17ec79d82 [ 31.674291] 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 [ 31.676438] RSP: 002b:00007ffca2769638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.677359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa17ec79d82 [ 31.678207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa17e0b3000 [ 31.679058] RBP: 00007fa17e0b3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.679909] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f7f5e6ec0 [ 31.680768] R13: 00007ffca2769650 R14: 00007ffca2769680 R15: 00007ffca27699e0 [ 31.681629] [ 31.681926] [ 31.682146] Allocated by task 213: [ 31.682574] kasan_save_stack+0x22/0x50 [ 31.683088] kasan_set_track+0x25/0x30 [ 31.683581] __kasan_slab_alloc+0x59/0x70 [ 31.684114] kmem_cache_alloc+0x16b/0x370 [ 31.684647] vm_area_dup+0x20/0x160 [ 31.685105] __split_vma+0x170/0x950 [ 31.685642] split_vma+0xc6/0x110 [ 31.686086] mprotect_fixup+0x8d2/0xb30 [ 31.686588] do_mprotect_pkey+0x87e/0xd40 [ 31.687121] __x64_sys_mprotect+0x78/0xc0 [ 31.687648] do_syscall_64+0x3f/0x90 [ 31.688131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.688793] [ 31.689012] Freed by task 213: [ 31.689407] kasan_save_stack+0x22/0x50 [ 31.689909] kasan_set_track+0x25/0x30 [ 31.690409] kasan_save_free_info+0x2b/0x50 [ 31.690943] __kasan_slab_free+0x10a/0x190 [ 31.691480] kmem_cache_free+0x10d/0x4d0 [ 31.692000] rcu_core+0x8c8/0x2860 [ 31.692447] __do_softirq+0x1b7/0x7d4 [ 31.692938] [ 31.693161] Last potentially related work creation: [ 31.693745] kasan_save_stack+0x22/0x50 [ 31.694254] __kasan_record_aux_stack+0x8e/0xa0 [ 31.694831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.695491] remove_vma+0x139/0x170 [ 31.695943] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.696535] do_vmi_munmap+0x1f1/0x2b0 [ 31.697033] __vm_munmap+0x138/0x3a0 [ 31.697518] __x64_sys_munmap+0x59/0x80 [ 31.698017] do_syscall_64+0x3f/0x90 [ 31.698498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.699149] [ 31.699374] The buggy address belongs to the object at ffff888006a110e8 [ 31.699374] which belongs to the cache vm_area_struct of size 168 [ 31.700857] The buggy address is located 88 bytes inside of [ 31.700857] freed 168-byte region [ffff888006a110e8, ffff888006a11190) [ 31.702289] [ 31.702513] The buggy address belongs to the physical page: [ 31.703186] page:0000000068302109 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6a11 [ 31.704291] memcg:ffff88801450c401 [ 31.704732] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.705435] page_type: 0xffffffff() [ 31.705888] raw: 0100000000000200 ffff8880087a0c80 ffffea0000575a00 dead000000000005 [ 31.706815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801450c401 [ 31.707734] page dumped because: kasan: bad access detected [ 31.708409] [ 31.708637] Memory state around the buggy address: [ 31.709227] ffff888006a11000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.710088] ffff888006a11080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.710944] >ffff888006a11100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.711794] ^ [ 31.712433] ffff888006a11180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.713296] ffff888006a11200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.714154] ================================================================== [ 31.715177] Disabling lock debugging due to kernel taint [ 33.951536] BUG: Bad rss-counter state mm:00000000d4180921 type:MM_FILEPAGES val:33 [ 33.952632] BUG: Bad rss-counter state mm:00000000d4180921 type:MM_ANONPAGES val:22 [ 34.511481] BUG: Bad rss-counter state mm:000000002cd8067e type:MM_FILEPAGES val:33 [ 34.512656] BUG: Bad rss-counter state mm:000000002cd8067e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1954' (ECDSA) to the list of known hosts. 2023/06/21 05:25:01 fuzzer started 2023/06/21 05:25:01 dialing manager at localhost:36067 2023/06/21 05:25:01 checking machine... 2023/06/21 05:25:01 checking revisions... [ 35.043960] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:25:02 testing simple program... [ 35.087598] cgroup: Unknown subsys name 'net' [ 35.125587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:01 Registers: info registers vcpu 0 RAX=00007f13b62090a0 RBX=00007ffd483171c0 RCX=000000000000acf8 RDX=0000000000000000 RSI=00007ffd483171c0 RDI=00007f13b632fcf8 RBP=000055cbcbe7e290 RSP=00007ffd48316c80 R8 =0000000000132cb8 R9 =0000000000132cb8 R10=0000000000000002 R11=000000000000e2b2 R12=000000000000002b R13=000000000000aab0 R14=0000000000000000 R15=00007ffd48316ca0 RIP=00007f13b7996ad1 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f13b6e12900 00000000 00000000 GS =0000 0000000000000000 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=00007f13b62090a0 CR3=000000000c712000 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=73bfc9d304e56e1300000000000ae988 XMM05=67300a2f93e8a3cd0000000000132970 XMM06=fa4add116be95db20000000000131710 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f0b514ad618 CR3=000000000e836000 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=35323a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303234 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000