syzkaller login: [ 31.586498] BUG: Bad rss-counter state mm:000000007a2a03e6 type:MM_FILEPAGES val:33 [ 31.587418] BUG: Bad rss-counter state mm:000000007a2a03e6 type:MM_ANONPAGES val:22 [ 31.619621] ================================================================== [ 31.620473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.621160] Read of size 8 at addr ffff88801670f228 by task sshd/220 [ 31.621750] [ 31.621940] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.622595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.623634] Call Trace: [ 31.623843] [ 31.624048] dump_stack_lvl+0x91/0xf0 [ 31.624456] print_report+0xcc/0x620 [ 31.624830] ? __virt_addr_valid+0x102/0x340 [ 31.625255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.625766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.626222] kasan_report+0xbe/0xf0 [ 31.626585] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627085] vma_interval_tree_remove+0xc75/0xec0 [ 31.627552] vma_prepare+0xc54/0x11a0 [ 31.627956] __split_vma+0x5af/0x950 [ 31.628282] ? __pfx___split_vma+0x10/0x10 [ 31.628662] ? find_held_lock+0x2c/0x110 [ 31.629130] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.629496] ? lock_is_held_type+0x9f/0x120 [ 31.629839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.630239] ? mtree_range_walk+0x632/0x900 [ 31.630597] ? mas_walk+0x5c7/0x7c0 [ 31.630944] do_vmi_munmap+0x1f1/0x2b0 [ 31.631263] mmap_region+0x1f9/0x2660 [ 31.631578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.631908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.632381] ? __pfx_lock_acquire+0x10/0x10 [ 31.632727] ? __pfx_mmap_region+0x10/0x10 [ 31.633084] ? security_mmap_addr+0x7d/0xa0 [ 31.633435] ? get_unmapped_area+0x1f5/0x3f0 [ 31.633799] do_mmap+0x854/0xf00 [ 31.634083] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.634414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.634778] ksys_mmap_pgoff+0x3af/0x500 [ 31.635147] do_syscall_64+0x3f/0x90 [ 31.635453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.635877] RIP: 0033:0x7f5c7ef32d82 [ 31.636184] 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 [ 31.637604] RSP: 002b:00007ffdf905b998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.638222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c7ef32d82 [ 31.638757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c7e36c000 [ 31.639333] RBP: 00007f5c7e36c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.639825] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560db1ab7ec0 [ 31.640317] R13: 00007ffdf905b9b0 R14: 00007ffdf905b9e0 R15: 00007ffdf905bd40 [ 31.640855] [ 31.641039] [ 31.641181] Allocated by task 213: [ 31.641466] kasan_save_stack+0x22/0x50 [ 31.641798] kasan_set_track+0x25/0x30 [ 31.642115] __kasan_slab_alloc+0x59/0x70 [ 31.642446] kmem_cache_alloc+0x16b/0x370 [ 31.642786] vm_area_dup+0x20/0x160 [ 31.643109] __split_vma+0x170/0x950 [ 31.643413] split_vma+0xc6/0x110 [ 31.643689] mprotect_fixup+0x8d2/0xb30 [ 31.644009] do_mprotect_pkey+0x87e/0xd40 [ 31.644354] __x64_sys_mprotect+0x78/0xc0 [ 31.644700] do_syscall_64+0x3f/0x90 [ 31.645025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.645451] [ 31.645589] Freed by task 13: [ 31.645840] kasan_save_stack+0x22/0x50 [ 31.646179] kasan_set_track+0x25/0x30 [ 31.646502] kasan_save_free_info+0x2b/0x50 [ 31.646923] __kasan_slab_free+0x10a/0x190 [ 31.647280] kmem_cache_free+0x10d/0x4d0 [ 31.647622] rcu_core+0x8c8/0x2860 [ 31.647926] __do_softirq+0x1b7/0x7d4 [ 31.648243] [ 31.648384] Last potentially related work creation: [ 31.648763] kasan_save_stack+0x22/0x50 [ 31.649082] __kasan_record_aux_stack+0x8e/0xa0 [ 31.649459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.649882] remove_vma+0x139/0x170 [ 31.650182] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.650549] do_vmi_munmap+0x1f1/0x2b0 [ 31.650907] __vm_munmap+0x138/0x3a0 [ 31.651241] __x64_sys_munmap+0x59/0x80 [ 31.651563] do_syscall_64+0x3f/0x90 [ 31.651872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.652341] [ 31.652482] The buggy address belongs to the object at ffff88801670f1d0 [ 31.652482] which belongs to the cache vm_area_struct of size 168 [ 31.653457] The buggy address is located 88 bytes inside of [ 31.653457] freed 168-byte region [ffff88801670f1d0, ffff88801670f278) [ 31.654380] [ 31.654514] The buggy address belongs to the physical page: [ 31.654995] page:00000000fa4e1d6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1670f [ 31.655700] memcg:ffff88800f189601 [ 31.655979] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.656421] page_type: 0xffffffff() [ 31.656728] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.657329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f189601 [ 31.657908] page dumped because: kasan: bad access detected [ 31.658331] [ 31.658471] Memory state around the buggy address: [ 31.658863] ffff88801670f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.659420] ffff88801670f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.659978] >ffff88801670f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.660553] ^ [ 31.660923] ffff88801670f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.661487] ffff88801670f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.662028] ================================================================== [ 31.662707] Disabling lock debugging due to kernel taint [ 33.061109] BUG: Bad rss-counter state mm:00000000a4ab2f18 type:MM_FILEPAGES val:33 [ 33.061869] BUG: Bad rss-counter state mm:00000000a4ab2f18 type:MM_ANONPAGES val:22 [ 33.443251] BUG: Bad rss-counter state mm:00000000ea1c3c79 type:MM_FILEPAGES val:33 [ 33.444043] BUG: Bad rss-counter state mm:00000000ea1c3c79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59387' (ECDSA) to the list of known hosts. 2023/06/20 09:44:26 fuzzer started 2023/06/20 09:44:27 dialing manager at localhost:44161 2023/06/20 09:44:27 checking machine... 2023/06/20 09:44:27 checking revisions... [ 34.039634] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:44:27 testing simple program... [ 34.073743] cgroup: Unknown subsys name 'net' [ 34.120717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:44:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f72d4a39dad RCX=0000000000000000 RDX=ffff8880101851c0 RSI=ffffffff81007b50 RDI=00007f72d4a39dad RBP=00007f72d4a39dad RSP=ffff88801641f268 R8 =ffffffff864b9d5a R9 =ffff88801641f328 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801641f3b0 R13=0000000000000000 R14=ffff8880101851c0 R15=0000000000092820 RIP=ffffffff814c081b 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 00007f72d43f7700 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=00007ffe1bac3d08 CR3=000000000e592000 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=63736964203a31313a38393333352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383933 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=0000000000000064 RBX=ffff88806cf3a2c0 RCX=1ffffffff0ba77f5 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=ffff88806cf3a2d8 RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=1ffff1100d9e7479 R12=ffffffff85616740 R13=0000000000000002 R14=0000000000000200 R15=0000000000000000 RIP=ffffffff813789e5 RFL=00000293 [--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 00007f177d8ca900 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=00007f94fd4b1650 CR3=00000000098a0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=645656651292f5ae00000000000ae988 XMM05=9b896dc92c8bbaa200000000001353d0 XMM06=4fda316b135da52b00000000001341c0 XMM07=fb795ef6d657705600000000001247e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000