syzkaller login: [ 30.040007] BUG: Bad rss-counter state mm:00000000f3beeb45 type:MM_FILEPAGES val:33 [ 30.041019] BUG: Bad rss-counter state mm:00000000f3beeb45 type:MM_ANONPAGES val:22 [ 30.205203] ================================================================== [ 30.206107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.207065] Read of size 8 at addr ffff88801695e880 by task sshd/220 [ 30.207852] [ 30.208074] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.209059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.210038] Call Trace: [ 30.210357] [ 30.210650] dump_stack_lvl+0x91/0xf0 [ 30.211158] print_report+0xcc/0x620 [ 30.211646] ? __virt_addr_valid+0x102/0x340 [ 30.212203] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.212823] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.213438] kasan_report+0xbe/0xf0 [ 30.213918] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.214535] vma_interval_tree_remove+0xc75/0xec0 [ 30.215156] vma_prepare+0xc54/0x11a0 [ 30.215634] __split_vma+0x5af/0x950 [ 30.216105] ? __pfx___split_vma+0x10/0x10 [ 30.216632] ? find_held_lock+0x2c/0x110 [ 30.217153] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.217711] ? lock_is_held_type+0x9f/0x120 [ 30.218252] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.218871] ? mtree_range_walk+0x632/0x900 [ 30.219421] ? mas_walk+0x5c7/0x7c0 [ 30.219896] do_vmi_munmap+0x1f1/0x2b0 [ 30.220395] mmap_region+0x1f9/0x2660 [ 30.220877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.221394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.222100] ? __pfx_lock_acquire+0x10/0x10 [ 30.222629] ? __pfx_mmap_region+0x10/0x10 [ 30.223168] ? security_mmap_addr+0x7d/0xa0 [ 30.223708] ? get_unmapped_area+0x1f5/0x3f0 [ 30.224258] do_mmap+0x854/0xf00 [ 30.224701] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.225196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.225761] ksys_mmap_pgoff+0x3af/0x500 [ 30.226268] do_syscall_64+0x3f/0x90 [ 30.226745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.227413] RIP: 0033:0x7f9958100d82 [ 30.227867] 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 [ 30.229973] RSP: 002b:00007ffd3afae198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.230881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9958100d82 [ 30.231733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f995753a000 [ 30.232573] RBP: 00007f995753a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.233413] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cddb35ec0 [ 30.234251] R13: 00007ffd3afae1b0 R14: 00007ffd3afae1e0 R15: 00007ffd3afae540 [ 30.235122] [ 30.235424] [ 30.235641] Allocated by task 213: [ 30.236073] kasan_save_stack+0x22/0x50 [ 30.236574] kasan_set_track+0x25/0x30 [ 30.237075] __kasan_slab_alloc+0x59/0x70 [ 30.237598] kmem_cache_alloc+0x16b/0x370 [ 30.238113] vm_area_dup+0x20/0x160 [ 30.238564] __split_vma+0x170/0x950 [ 30.239035] split_vma+0xc6/0x110 [ 30.239483] mprotect_fixup+0x8d2/0xb30 [ 30.239982] do_mprotect_pkey+0x87e/0xd40 [ 30.240500] __x64_sys_mprotect+0x78/0xc0 [ 30.241021] do_syscall_64+0x3f/0x90 [ 30.241494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.242132] [ 30.242350] Freed by task 13: [ 30.242731] kasan_save_stack+0x22/0x50 [ 30.243283] kasan_set_track+0x25/0x30 [ 30.243779] kasan_save_free_info+0x2b/0x50 [ 30.244310] __kasan_slab_free+0x10a/0x190 [ 30.244844] kmem_cache_free+0x10d/0x4d0 [ 30.245355] rcu_core+0x8c8/0x2860 [ 30.245809] __do_softirq+0x1b7/0x7d4 [ 30.246290] [ 30.246506] Last potentially related work creation: [ 30.247127] kasan_save_stack+0x22/0x50 [ 30.247632] __kasan_record_aux_stack+0x8e/0xa0 [ 30.248205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.248850] remove_vma+0x139/0x170 [ 30.249337] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.249898] do_vmi_munmap+0x1f1/0x2b0 [ 30.250385] __vm_munmap+0x138/0x3a0 [ 30.250875] __x64_sys_munmap+0x59/0x80 [ 30.251372] do_syscall_64+0x3f/0x90 [ 30.251844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.252494] [ 30.252711] The buggy address belongs to the object at ffff88801695e828 [ 30.252711] which belongs to the cache vm_area_struct of size 168 [ 30.254166] The buggy address is located 88 bytes inside of [ 30.254166] freed 168-byte region [ffff88801695e828, ffff88801695e8d0) [ 30.255568] [ 30.255781] The buggy address belongs to the physical page: [ 30.256431] page:0000000054fe8475 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1695e [ 30.257517] memcg:ffff888014119b01 [ 30.257940] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.258591] page_type: 0xffffffff() [ 30.259048] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.259956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014119b01 [ 30.260857] page dumped because: kasan: bad access detected [ 30.261519] [ 30.261735] Memory state around the buggy address: [ 30.262308] ffff88801695e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.263177] ffff88801695e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.264028] >ffff88801695e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.264871] ^ [ 30.265276] ffff88801695e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.266126] ffff88801695e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.266977] ================================================================== [ 30.267899] Disabling lock debugging due to kernel taint [ 32.338566] BUG: Bad rss-counter state mm:000000002840b7d5 type:MM_FILEPAGES val:33 [ 32.339816] BUG: Bad rss-counter state mm:000000002840b7d5 type:MM_ANONPAGES val:22 [ 32.893305] BUG: Bad rss-counter state mm:000000006ff76c9c type:MM_FILEPAGES val:33 [ 32.894455] BUG: Bad rss-counter state mm:000000006ff76c9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7738' (ECDSA) to the list of known hosts. 2023/06/21 04:29:37 fuzzer started 2023/06/21 04:29:38 dialing manager at localhost:36067 2023/06/21 04:29:38 checking machine... 2023/06/21 04:29:38 checking revisions... [ 33.512182] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:29:38 testing simple program... [ 33.569232] cgroup: Unknown subsys name 'net' [ 33.631691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:29:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00007ffd5e2fe1d8 RCX=ffffffff864bbb54 RDX=1ffff11001decea6 RSI=0000000000000000 RDI=ffff88800ef67530 RBP=ffff88800ef60000 RSP=ffff88800ef674b0 R8 =ffffffff864bbb58 R9 =ffff88800ef67560 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800ef67f58 R13=ffff88800ef67568 R14=ffff88800ef67f58 R15=ffff88800ef67520 RIP=ffffffff81131ca6 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 00007fb0f01f8900 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=00007fb0f07af618 CR3=000000000ebee000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=1 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=00007fd49d113000 CR3=000000000cae6000 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=f2270bd84b29d5a0b447b9d378feccd5 XMM02=2c67c8bc2e329bc3000000000011a828 XMM03=fb795ef6d65770560000000000121c90 XMM04=ef943595c815688900000000000ae988 XMM05=19e9129bd510f2350000000000131ae8 XMM06=7f238aead56994dd0000000000130950 XMM07=e042d86d42eb936e0000000000121f10 XMM08=67d7fe826e3feb82000000000011a888 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000