syzkaller login: [ 31.180117] BUG: Bad rss-counter state mm:00000000ef2adcc4 type:MM_FILEPAGES val:33 [ 31.181296] BUG: Bad rss-counter state mm:00000000ef2adcc4 type:MM_ANONPAGES val:22 [ 31.219725] ================================================================== [ 31.220703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.221731] Read of size 8 at addr ffff88800e0745c8 by task sshd/219 [ 31.222549] [ 31.222768] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.223732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.224715] Call Trace: [ 31.225019] [ 31.225286] dump_stack_lvl+0x91/0xf0 [ 31.225754] print_report+0xcc/0x620 [ 31.226221] ? __virt_addr_valid+0x102/0x340 [ 31.226754] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227478] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.228087] kasan_report+0xbe/0xf0 [ 31.228627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.229337] vma_interval_tree_remove+0xc75/0xec0 [ 31.229936] vma_prepare+0xc54/0x11a0 [ 31.230538] __split_vma+0x5af/0x950 [ 31.231011] ? __pfx___split_vma+0x10/0x10 [ 31.231531] ? find_held_lock+0x2c/0x110 [ 31.232051] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.232696] ? lock_is_held_type+0x9f/0x120 [ 31.233331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.233969] ? mtree_range_walk+0x632/0x900 [ 31.234527] ? mas_walk+0x5c7/0x7c0 [ 31.234998] do_vmi_munmap+0x1f1/0x2b0 [ 31.235481] mmap_region+0x1f9/0x2660 [ 31.235957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.236456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.237170] ? __pfx_lock_acquire+0x10/0x10 [ 31.237696] ? __pfx_mmap_region+0x10/0x10 [ 31.238242] ? security_mmap_addr+0x7d/0xa0 [ 31.238774] ? get_unmapped_area+0x1f5/0x3f0 [ 31.239320] do_mmap+0x854/0xf00 [ 31.239752] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.240247] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.240809] ksys_mmap_pgoff+0x3af/0x500 [ 31.241313] do_syscall_64+0x3f/0x90 [ 31.241793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.242445] RIP: 0033:0x7f83f894dd82 [ 31.242974] 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 [ 31.245074] RSP: 002b:00007ffcf6332848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.245957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83f894dd82 [ 31.246805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83f7d87000 [ 31.247653] RBP: 00007f83f7d87000 R08: 0000000000000009 R09: 0000000000001000 [ 31.248497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c89fd9f60 [ 31.249338] R13: 00007ffcf6332860 R14: 00007ffcf6332890 R15: 00007ffcf6332bf0 [ 31.250186] [ 31.250469] [ 31.250679] Allocated by task 212: [ 31.251096] kasan_save_stack+0x22/0x50 [ 31.251603] kasan_set_track+0x25/0x30 [ 31.252090] __kasan_slab_alloc+0x59/0x70 [ 31.252611] kmem_cache_alloc+0x16b/0x370 [ 31.253113] vm_area_dup+0x20/0x160 [ 31.253555] __split_vma+0x170/0x950 [ 31.254016] split_vma+0xc6/0x110 [ 31.254434] mprotect_fixup+0x8d2/0xb30 [ 31.254908] do_mprotect_pkey+0x87e/0xd40 [ 31.255403] __x64_sys_mprotect+0x78/0xc0 [ 31.255892] do_syscall_64+0x3f/0x90 [ 31.256341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256952] [ 31.257165] Freed by task 212: [ 31.257535] kasan_save_stack+0x22/0x50 [ 31.258017] kasan_set_track+0x25/0x30 [ 31.258482] kasan_save_free_info+0x2b/0x50 [ 31.258984] __kasan_slab_free+0x10a/0x190 [ 31.259512] kmem_cache_free+0x10d/0x4d0 [ 31.260005] rcu_core+0x8c8/0x2860 [ 31.260426] __do_softirq+0x1b7/0x7d4 [ 31.260906] [ 31.261117] Last potentially related work creation: [ 31.261692] kasan_save_stack+0x22/0x50 [ 31.262206] __kasan_record_aux_stack+0x8e/0xa0 [ 31.262772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.263400] remove_vma+0x139/0x170 [ 31.263835] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.264364] do_vmi_munmap+0x1f1/0x2b0 [ 31.264874] __vm_munmap+0x138/0x3a0 [ 31.265319] __x64_sys_munmap+0x59/0x80 [ 31.265804] do_syscall_64+0x3f/0x90 [ 31.266274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266905] [ 31.267121] The buggy address belongs to the object at ffff88800e074570 [ 31.267121] which belongs to the cache vm_area_struct of size 168 [ 31.268595] The buggy address is located 88 bytes inside of [ 31.268595] freed 168-byte region [ffff88800e074570, ffff88800e074618) [ 31.269992] [ 31.270203] The buggy address belongs to the physical page: [ 31.270854] page:0000000023e5875e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe074 [ 31.271933] memcg:ffff88800dc89601 [ 31.272351] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.272986] page_type: 0xffffffff() [ 31.273429] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390d80 dead000000000006 [ 31.274356] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc89601 [ 31.275247] page dumped because: kasan: bad access detected [ 31.275894] [ 31.276112] Memory state around the buggy address: [ 31.276684] ffff88800e074480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.277527] ffff88800e074500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.278389] >ffff88800e074580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.279220] ^ [ 31.279846] ffff88800e074600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.280650] ffff88800e074680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.281454] ================================================================== [ 31.282325] Disabling lock debugging due to kernel taint [ 33.223107] BUG: Bad rss-counter state mm:000000004ed555bb type:MM_FILEPAGES val:33 [ 33.224277] BUG: Bad rss-counter state mm:000000004ed555bb type:MM_ANONPAGES val:22 [ 33.719380] BUG: Bad rss-counter state mm:00000000143f94ad type:MM_FILEPAGES val:33 [ 33.720400] BUG: Bad rss-counter state mm:00000000143f94ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44503' (ECDSA) to the list of known hosts. 2023/06/20 21:42:17 fuzzer started 2023/06/20 21:42:18 dialing manager at localhost:36067 2023/06/20 21:42:18 checking machine... 2023/06/20 21:42:18 checking revisions... [ 34.413155] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:42:18 testing simple program... [ 34.466464] cgroup: Unknown subsys name 'net' [ 34.529174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:42:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000200 RCX=ffffffff815343f6 RDX=0000000000000004 RSI=0000000000000008 RDI=ffff88806ce3a2d4 RBP=ffffffff8136abdd RSP=ffff88806ce09e20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000006161 R15=ffff88806ce3a2d2 RIP=ffffffff815342b7 RFL=00000002 [-------] 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 00007f43ad8bd900 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=00007f43ad87101c CR3=000000001a7da000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007f70a92ffca0 CR3=000000000f556000 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=f6d948290ee962b9194c35faa19d998e XMM02=000000000011a620d59e07bde36eea69 XMM03=000000000011a748ec2efd57dc4c00df XMM04=91ff9d7cfdaa485700000000000ae988 XMM05=466b7ac41da21bfd0000000000132cd0 XMM06=59e8e1a6b88b2efd0000000000131a70 XMM07=fb795ef6d65770560000000000121cc0 XMM08=2c67c8bc2e329bc3000000000011a748 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000