syzkaller login: [ 31.054367] BUG: Bad rss-counter state mm:000000003f47df78 type:MM_FILEPAGES val:33 [ 31.055311] BUG: Bad rss-counter state mm:000000003f47df78 type:MM_ANONPAGES val:22 [ 31.214914] ================================================================== [ 31.215895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.216948] Read of size 8 at addr ffff8880146bd3f8 by task sshd/221 [ 31.217992] [ 31.218252] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.219311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.220543] Call Trace: [ 31.220942] [ 31.221292] dump_stack_lvl+0x91/0xf0 [ 31.221881] print_report+0xcc/0x620 [ 31.222481] ? __virt_addr_valid+0x102/0x340 [ 31.223164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.224673] kasan_report+0xbe/0xf0 [ 31.225244] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226006] vma_interval_tree_remove+0xc75/0xec0 [ 31.226730] vma_prepare+0xc54/0x11a0 [ 31.227317] __split_vma+0x5af/0x950 [ 31.227921] ? __pfx___split_vma+0x10/0x10 [ 31.228552] ? find_held_lock+0x2c/0x110 [ 31.229179] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.229864] ? lock_is_held_type+0x9f/0x120 [ 31.230516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.231260] ? mtree_range_walk+0x632/0x900 [ 31.231946] ? mas_walk+0x5c7/0x7c0 [ 31.232517] do_vmi_munmap+0x1f1/0x2b0 [ 31.233110] mmap_region+0x1f9/0x2660 [ 31.233687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.234311] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235182] ? __pfx_lock_acquire+0x10/0x10 [ 31.235841] ? __pfx_mmap_region+0x10/0x10 [ 31.236482] ? security_mmap_addr+0x7d/0xa0 [ 31.237132] ? get_unmapped_area+0x1f5/0x3f0 [ 31.237792] do_mmap+0x854/0xf00 [ 31.238320] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.238925] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239602] ksys_mmap_pgoff+0x3af/0x500 [ 31.240245] do_syscall_64+0x3f/0x90 [ 31.240829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241620] RIP: 0033:0x7f362683ad82 [ 31.242175] 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 [ 31.244778] RSP: 002b:00007ffe41ce22c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.245874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f362683ad82 [ 31.246910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3625c74000 [ 31.247942] RBP: 00007f3625c74000 R08: 0000000000000009 R09: 0000000000001000 [ 31.248742] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561da1374b20 [ 31.249550] R13: 00007ffe41ce22e0 R14: 00007ffe41ce2310 R15: 00007ffe41ce2670 [ 31.250361] [ 31.250638] [ 31.250849] Allocated by task 214: [ 31.251251] kasan_save_stack+0x22/0x50 [ 31.251728] kasan_set_track+0x25/0x30 [ 31.252218] __kasan_slab_alloc+0x59/0x70 [ 31.252719] kmem_cache_alloc+0x16b/0x370 [ 31.253206] vm_area_dup+0x20/0x160 [ 31.253633] __split_vma+0x170/0x950 [ 31.254076] split_vma+0xc6/0x110 [ 31.254490] mprotect_fixup+0x8d2/0xb30 [ 31.254964] do_mprotect_pkey+0x87e/0xd40 [ 31.255458] __x64_sys_mprotect+0x78/0xc0 [ 31.255963] do_syscall_64+0x3f/0x90 [ 31.256412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257019] [ 31.257221] Freed by task 19: [ 31.257590] kasan_save_stack+0x22/0x50 [ 31.258087] kasan_set_track+0x25/0x30 [ 31.258569] kasan_save_free_info+0x2b/0x50 [ 31.259085] __kasan_slab_free+0x10a/0x190 [ 31.259643] kmem_cache_free+0x10d/0x4d0 [ 31.260159] rcu_core+0x8c8/0x2860 [ 31.260596] __do_softirq+0x1b7/0x7d4 [ 31.261063] [ 31.261273] Last potentially related work creation: [ 31.261843] kasan_save_stack+0x22/0x50 [ 31.262332] __kasan_record_aux_stack+0x8e/0xa0 [ 31.262902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.263529] remove_vma+0x139/0x170 [ 31.263968] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.264513] do_vmi_munmap+0x1f1/0x2b0 [ 31.264989] __vm_munmap+0x138/0x3a0 [ 31.265442] __x64_sys_munmap+0x59/0x80 [ 31.265930] do_syscall_64+0x3f/0x90 [ 31.266397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267024] [ 31.267236] The buggy address belongs to the object at ffff8880146bd3a0 [ 31.267236] which belongs to the cache vm_area_struct of size 168 [ 31.268706] The buggy address is located 88 bytes inside of [ 31.268706] freed 168-byte region [ffff8880146bd3a0, ffff8880146bd448) [ 31.270068] [ 31.270279] The buggy address belongs to the physical page: [ 31.270919] page:000000007bbec0a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146bd [ 31.271994] memcg:ffff888018fae201 [ 31.272408] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.273044] page_type: 0xffffffff() [ 31.273481] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.274386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fae201 [ 31.275277] page dumped because: kasan: bad access detected [ 31.275934] [ 31.276142] Memory state around the buggy address: [ 31.276706] ffff8880146bd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.277541] ffff8880146bd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.278376] >ffff8880146bd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.279222] ^ [ 31.280054] ffff8880146bd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.280896] ffff8880146bd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.281746] ================================================================== [ 31.282690] Disabling lock debugging due to kernel taint [ 33.241423] BUG: Bad rss-counter state mm:00000000097205e0 type:MM_FILEPAGES val:33 [ 33.242894] BUG: Bad rss-counter state mm:00000000097205e0 type:MM_ANONPAGES val:22 [ 33.756944] BUG: Bad rss-counter state mm:000000003066f1cf type:MM_FILEPAGES val:33 [ 33.758184] BUG: Bad rss-counter state mm:000000003066f1cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5755' (ECDSA) to the list of known hosts. 2023/06/21 07:35:44 fuzzer started 2023/06/21 07:35:44 dialing manager at localhost:36067 2023/06/21 07:35:44 checking machine... 2023/06/21 07:35:44 checking revisions... [ 34.439943] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:35:45 testing simple program... [ 34.490113] cgroup: Unknown subsys name 'net' [ 34.541813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c527a20 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888015f0e130 RBP=0000000000000001 RSP=ffff88800c527a10 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff888015f0e130 R15=0000000000000000 RIP=ffffffff812d8e97 RFL=00000282 [--S----] 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 00007f7c76327900 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=00007f7c768de618 CR3=0000000019bb4000 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=0000000000000001 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=00007f7b16b6a668 CR3=000000000c704000 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=b1e1cea1da346cb84243c2f23a54c845 XMM02=2c67c8bc2e329bc3000000000011d7e0 XMM03=fb795ef6d65770560000000000121f80 XMM04=362c17b6139ce6e400000000000ae988 XMM05=e4cb8bb95a7664b60000000000131e70 XMM06=c291bd5c70af25b90000000000131cf8 XMM07=e042d86d42eb936e0000000000122200 XMM08=f8a6a38db508811f000000000011d840 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000