syzkaller login: [ 30.593445] BUG: Bad rss-counter state mm:0000000083d5fc44 type:MM_FILEPAGES val:33 [ 30.594658] BUG: Bad rss-counter state mm:0000000083d5fc44 type:MM_ANONPAGES val:22 [ 30.634972] ================================================================== [ 30.635883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.636844] Read of size 8 at addr ffff88800fd1e968 by task sshd/220 [ 30.637601] [ 30.637820] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.638676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.639649] Call Trace: [ 30.639987] [ 30.640276] dump_stack_lvl+0x91/0xf0 [ 30.640766] print_report+0xcc/0x620 [ 30.641249] ? __virt_addr_valid+0x102/0x340 [ 30.641892] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642501] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643111] kasan_report+0xbe/0xf0 [ 30.643583] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644227] vma_interval_tree_remove+0xc75/0xec0 [ 30.644826] vma_prepare+0xc54/0x11a0 [ 30.645307] __split_vma+0x5af/0x950 [ 30.645775] ? __pfx___split_vma+0x10/0x10 [ 30.646303] ? find_held_lock+0x2c/0x110 [ 30.646828] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.647389] ? lock_is_held_type+0x9f/0x120 [ 30.647936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.648539] ? mtree_range_walk+0x632/0x900 [ 30.649093] ? mas_walk+0x5c7/0x7c0 [ 30.649570] do_vmi_munmap+0x1f1/0x2b0 [ 30.650068] mmap_region+0x1f9/0x2660 [ 30.650555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.651070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651784] ? __pfx_lock_acquire+0x10/0x10 [ 30.652331] ? __pfx_mmap_region+0x10/0x10 [ 30.652866] ? security_mmap_addr+0x7d/0xa0 [ 30.653401] ? get_unmapped_area+0x1f5/0x3f0 [ 30.653956] do_mmap+0x854/0xf00 [ 30.654389] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.654889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.655445] ksys_mmap_pgoff+0x3af/0x500 [ 30.655972] do_syscall_64+0x3f/0x90 [ 30.656451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.657104] RIP: 0033:0x7fce120edd82 [ 30.657561] 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 [ 30.659681] RSP: 002b:00007ffec3069808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.660590] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce120edd82 [ 30.661431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce11527000 [ 30.662278] RBP: 00007fce11527000 R08: 0000000000000009 R09: 0000000000001000 [ 30.663116] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e5c634b20 [ 30.663977] R13: 00007ffec3069820 R14: 00007ffec3069850 R15: 00007ffec3069bb0 [ 30.664822] [ 30.665116] [ 30.665333] Allocated by task 213: [ 30.665760] kasan_save_stack+0x22/0x50 [ 30.666260] kasan_set_track+0x25/0x30 [ 30.666754] __kasan_slab_alloc+0x59/0x70 [ 30.667271] kmem_cache_alloc+0x16b/0x370 [ 30.667785] vm_area_dup+0x20/0x160 [ 30.668246] __split_vma+0x170/0x950 [ 30.668709] split_vma+0xc6/0x110 [ 30.669151] mprotect_fixup+0x8d2/0xb30 [ 30.669651] do_mprotect_pkey+0x87e/0xd40 [ 30.670171] __x64_sys_mprotect+0x78/0xc0 [ 30.670687] do_syscall_64+0x3f/0x90 [ 30.671161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671804] [ 30.672029] Freed by task 213: [ 30.672424] kasan_save_stack+0x22/0x50 [ 30.672931] kasan_set_track+0x25/0x30 [ 30.673421] kasan_save_free_info+0x2b/0x50 [ 30.673952] __kasan_slab_free+0x10a/0x190 [ 30.674485] kmem_cache_free+0x10d/0x4d0 [ 30.674994] rcu_core+0x8c8/0x2860 [ 30.675436] __do_softirq+0x1b7/0x7d4 [ 30.675922] [ 30.676147] Last potentially related work creation: [ 30.676722] kasan_save_stack+0x22/0x50 [ 30.677217] __kasan_record_aux_stack+0x8e/0xa0 [ 30.677784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.678428] remove_vma+0x139/0x170 [ 30.678880] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.679441] do_vmi_munmap+0x1f1/0x2b0 [ 30.679938] __vm_munmap+0x138/0x3a0 [ 30.680400] __x64_sys_munmap+0x59/0x80 [ 30.680901] do_syscall_64+0x3f/0x90 [ 30.681374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.682027] [ 30.682241] The buggy address belongs to the object at ffff88800fd1e910 [ 30.682241] which belongs to the cache vm_area_struct of size 168 [ 30.683732] The buggy address is located 88 bytes inside of [ 30.683732] freed 168-byte region [ffff88800fd1e910, ffff88800fd1e9b8) [ 30.685154] [ 30.685372] The buggy address belongs to the physical page: [ 30.686029] page:000000006d51d178 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1e [ 30.687108] memcg:ffff88800e2fae01 [ 30.687533] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.688188] page_type: 0xffffffff() [ 30.688632] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.689544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2fae01 [ 30.690447] page dumped because: kasan: bad access detected [ 30.691100] [ 30.691317] Memory state around the buggy address: [ 30.691892] ffff88800fd1e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.692769] ffff88800fd1e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.693624] >ffff88800fd1e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.694477] ^ [ 30.695254] ffff88800fd1e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.696113] ffff88800fd1ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.696960] ================================================================== [ 30.697937] Disabling lock debugging due to kernel taint [ 32.666736] BUG: Bad rss-counter state mm:00000000b0bdec52 type:MM_FILEPAGES val:33 [ 32.668129] BUG: Bad rss-counter state mm:00000000b0bdec52 type:MM_ANONPAGES val:22 [ 33.130465] BUG: Bad rss-counter state mm:0000000059bd2786 type:MM_FILEPAGES val:33 [ 33.131524] BUG: Bad rss-counter state mm:0000000059bd2786 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49720' (ECDSA) to the list of known hosts. 2023/06/21 05:19:26 fuzzer started 2023/06/21 05:19:27 dialing manager at localhost:36067 2023/06/21 05:19:27 checking machine... 2023/06/21 05:19:27 checking revisions... [ 33.867394] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:19:27 testing simple program... [ 33.924846] cgroup: Unknown subsys name 'net' [ 33.975844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:19:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800eabf700 RCX=0000000000000000 RDX=ffff888016cc9b40 RSI=ffffffff8369e5ad RDI=00000000000000e5 RBP=00000000000000e5 RSP=ffff88801589f890 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=ffff88801589fb80 R15=ffff888016cc9b40 RIP=ffffffff811f87b4 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 00007ff4a9fb4900 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=00007f3ee7b0f650 CR3=00000000096ba000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b7c040bb13e7e11a00000000000ae988 XMM05=d977e6afe51b75a80000000000133430 XMM06=482f8340b136177500000000001321d0 XMM07=fb795ef6d65770560000000000122410 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016d38000 RSI=ffffffff83ab1b1f RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800ff57500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000093f0000093f R12=0000000000000000 R13=0000000000000096 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff812d8650 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 00007f3ee755a900 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=00007f3ee7b11618 CR3=000000000e526000 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=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