syzkaller login: [ 28.980910] BUG: Bad rss-counter state mm:00000000b6e7f99a type:MM_FILEPAGES val:33 [ 28.982135] BUG: Bad rss-counter state mm:00000000b6e7f99a type:MM_ANONPAGES val:22 [ 29.183125] ================================================================== [ 29.184070] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.185048] Read of size 8 at addr ffff888016a21d08 by task sshd/221 [ 29.185905] [ 29.186146] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.187038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.188076] Call Trace: [ 29.188423] [ 29.188722] dump_stack_lvl+0x91/0xf0 [ 29.189233] print_report+0xcc/0x620 [ 29.189729] ? __virt_addr_valid+0x102/0x340 [ 29.190288] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.190914] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.191536] kasan_report+0xbe/0xf0 [ 29.192023] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.192658] vma_interval_tree_remove+0xc75/0xec0 [ 29.193274] vma_prepare+0xc54/0x11a0 [ 29.193767] __split_vma+0x5af/0x950 [ 29.194239] ? __pfx___split_vma+0x10/0x10 [ 29.194778] ? find_held_lock+0x2c/0x110 [ 29.195310] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.195888] ? lock_is_held_type+0x9f/0x120 [ 29.196452] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.197075] ? mtree_range_walk+0x632/0x900 [ 29.197639] ? mas_walk+0x5c7/0x7c0 [ 29.198127] do_vmi_munmap+0x1f1/0x2b0 [ 29.198622] mmap_region+0x1f9/0x2660 [ 29.199101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.199623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.200351] ? __pfx_lock_acquire+0x10/0x10 [ 29.200910] ? __pfx_mmap_region+0x10/0x10 [ 29.201445] ? security_mmap_addr+0x7d/0xa0 [ 29.201987] ? get_unmapped_area+0x1f5/0x3f0 [ 29.202542] do_mmap+0x854/0xf00 [ 29.202986] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.203482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.204052] ksys_mmap_pgoff+0x3af/0x500 [ 29.204585] do_syscall_64+0x3f/0x90 [ 29.205068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.205725] RIP: 0033:0x7f4f59576d82 [ 29.206191] 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 [ 29.208347] RSP: 002b:00007ffde9c65ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.209281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f59576d82 [ 29.210143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f589b0000 [ 29.210994] RBP: 00007f4f589b0000 R08: 0000000000000009 R09: 0000000000001000 [ 29.211862] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559fe4496b20 [ 29.212729] R13: 00007ffde9c65ae0 R14: 00007ffde9c65b10 R15: 00007ffde9c65e70 [ 29.213596] [ 29.213896] [ 29.214117] Allocated by task 212: [ 29.214555] kasan_save_stack+0x22/0x50 [ 29.215074] kasan_set_track+0x25/0x30 [ 29.215577] __kasan_slab_alloc+0x59/0x70 [ 29.216107] kmem_cache_alloc+0x16b/0x370 [ 29.216647] vm_area_dup+0x20/0x160 [ 29.217113] __split_vma+0x170/0x950 [ 29.217582] split_vma+0xc6/0x110 [ 29.218036] mprotect_fixup+0x8d2/0xb30 [ 29.218552] do_mprotect_pkey+0x87e/0xd40 [ 29.219080] __x64_sys_mprotect+0x78/0xc0 [ 29.219613] do_syscall_64+0x3f/0x90 [ 29.220102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.220761] [ 29.220980] Freed by task 212: [ 29.221379] kasan_save_stack+0x22/0x50 [ 29.221884] kasan_set_track+0x25/0x30 [ 29.222387] kasan_save_free_info+0x2b/0x50 [ 29.222935] __kasan_slab_free+0x10a/0x190 [ 29.223477] kmem_cache_free+0x10d/0x4d0 [ 29.223998] rcu_core+0x8c8/0x2860 [ 29.224458] __do_softirq+0x1b7/0x7d4 [ 29.224940] [ 29.225159] Last potentially related work creation: [ 29.225745] kasan_save_stack+0x22/0x50 [ 29.226260] __kasan_record_aux_stack+0x8e/0xa0 [ 29.226839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.227488] remove_vma+0x139/0x170 [ 29.227942] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.228518] do_vmi_munmap+0x1f1/0x2b0 [ 29.229004] __vm_munmap+0x138/0x3a0 [ 29.229471] __x64_sys_munmap+0x59/0x80 [ 29.229978] do_syscall_64+0x3f/0x90 [ 29.230466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.231126] [ 29.231346] The buggy address belongs to the object at ffff888016a21cb0 [ 29.231346] which belongs to the cache vm_area_struct of size 168 [ 29.232829] The buggy address is located 88 bytes inside of [ 29.232829] freed 168-byte region [ffff888016a21cb0, ffff888016a21d58) [ 29.234254] [ 29.234476] The buggy address belongs to the physical page: [ 29.235151] page:000000006ee36cff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a21 [ 29.236271] memcg:ffff88801670a801 [ 29.236715] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.237365] page_type: 0xffffffff() [ 29.237821] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.238768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801670a801 [ 29.239685] page dumped because: kasan: bad access detected [ 29.240352] [ 29.240588] Memory state around the buggy address: [ 29.241197] ffff888016a21c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.242074] ffff888016a21c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.242939] >ffff888016a21d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.243805] ^ [ 29.244249] ffff888016a21d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.245124] ffff888016a21e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.245980] ================================================================== [ 29.246983] Disabling lock debugging due to kernel taint [ 31.267712] BUG: Bad rss-counter state mm:00000000cf78ccd0 type:MM_FILEPAGES val:33 [ 31.268810] BUG: Bad rss-counter state mm:00000000cf78ccd0 type:MM_ANONPAGES val:22 [ 31.765375] BUG: Bad rss-counter state mm:00000000b6271d01 type:MM_FILEPAGES val:33 [ 31.766556] BUG: Bad rss-counter state mm:00000000b6271d01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47002' (ECDSA) to the list of known hosts. 2023/06/20 15:37:13 fuzzer started 2023/06/20 15:37:14 dialing manager at localhost:36067 2023/06/20 15:37:14 checking machine... 2023/06/20 15:37:14 checking revisions... [ 32.454599] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:37:14 testing simple program... [ 32.501338] cgroup: Unknown subsys name 'net' [ 32.532908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:37:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=0000000000000006 RBP=ffff888015c27d28 RSP=ffff888015c27c60 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=00000000c000003e R13=ffff888015c27d60 R14=00000000c000003e R15=ffffc90000681078 RIP=ffffffff815a29e5 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 00007fd3c0356900 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=00007fd3bf79d660 CR3=0000000008c70000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7e67ffd8758304de00000000000ae988 XMM05=206afc09a84a3c530000000000133270 XMM06=f3c821cb4546e3fa0000000000132010 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100d9e136c RBX=1ffff1100d9e136c RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf2b958 RBP=0000000000000001 RSP=ffff88806cf09b50 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf2b958 R15=0000000000000000 RIP=ffffffff812d8ebf RFL=00000086 [--S--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 00007feca591a900 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=00007ffe60647000 CR3=000000000d8ea000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000