syzkaller login: [ 30.021983] BUG: Bad rss-counter state mm:00000000dc918e7f type:MM_FILEPAGES val:33 [ 30.023086] BUG: Bad rss-counter state mm:00000000dc918e7f type:MM_ANONPAGES val:22 [ 30.194099] ================================================================== [ 30.195281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.196252] Read of size 8 at addr ffff88800ecb0d08 by task sshd/222 [ 30.197031] [ 30.197261] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.198140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.199130] Call Trace: [ 30.199454] [ 30.199769] dump_stack_lvl+0x91/0xf0 [ 30.200269] print_report+0xcc/0x620 [ 30.200758] ? __virt_addr_valid+0x102/0x340 [ 30.201314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.201926] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.202563] kasan_report+0xbe/0xf0 [ 30.203041] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.203689] vma_interval_tree_remove+0xc75/0xec0 [ 30.204295] vma_prepare+0xc54/0x11a0 [ 30.204771] __split_vma+0x5af/0x950 [ 30.205253] ? __pfx___split_vma+0x10/0x10 [ 30.205790] ? find_held_lock+0x2c/0x110 [ 30.206308] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.206880] ? lock_is_held_type+0x9f/0x120 [ 30.207430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.208073] ? mtree_range_walk+0x632/0x900 [ 30.208630] ? mas_walk+0x5c7/0x7c0 [ 30.209125] do_vmi_munmap+0x1f1/0x2b0 [ 30.209623] mmap_region+0x1f9/0x2660 [ 30.210110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.210617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.211332] ? __pfx_lock_acquire+0x10/0x10 [ 30.211891] ? __pfx_mmap_region+0x10/0x10 [ 30.212427] ? security_mmap_addr+0x7d/0xa0 [ 30.212966] ? get_unmapped_area+0x1f5/0x3f0 [ 30.213523] do_mmap+0x854/0xf00 [ 30.213961] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.214475] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.215050] ksys_mmap_pgoff+0x3af/0x500 [ 30.215567] do_syscall_64+0x3f/0x90 [ 30.216079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.216738] RIP: 0033:0x7feafda83d82 [ 30.217212] 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 [ 30.219386] RSP: 002b:00007ffc9eff6738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.220311] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feafda83d82 [ 30.221171] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feafcebd000 [ 30.222035] RBP: 00007feafcebd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.222883] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a529e3af70 [ 30.223766] R13: 00007ffc9eff6750 R14: 00007ffc9eff6780 R15: 00007ffc9eff6ae0 [ 30.224651] [ 30.224958] [ 30.225179] Allocated by task 213: [ 30.225612] kasan_save_stack+0x22/0x50 [ 30.226133] kasan_set_track+0x25/0x30 [ 30.226637] __kasan_slab_alloc+0x59/0x70 [ 30.227166] kmem_cache_alloc+0x16b/0x370 [ 30.227714] vm_area_dup+0x20/0x160 [ 30.228174] __split_vma+0x170/0x950 [ 30.228680] split_vma+0xc6/0x110 [ 30.229127] mprotect_fixup+0x8d2/0xb30 [ 30.229639] do_mprotect_pkey+0x87e/0xd40 [ 30.230170] __x64_sys_mprotect+0x78/0xc0 [ 30.230694] do_syscall_64+0x3f/0x90 [ 30.231172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.231832] [ 30.232047] Freed by task 19: [ 30.232444] kasan_save_stack+0x22/0x50 [ 30.232958] kasan_set_track+0x25/0x30 [ 30.233463] kasan_save_free_info+0x2b/0x50 [ 30.234011] __kasan_slab_free+0x10a/0x190 [ 30.234561] kmem_cache_free+0x10d/0x4d0 [ 30.235075] rcu_core+0x8c8/0x2860 [ 30.235522] __do_softirq+0x1b7/0x7d4 [ 30.236009] [ 30.236223] Last potentially related work creation: [ 30.236816] kasan_save_stack+0x22/0x50 [ 30.237323] __kasan_record_aux_stack+0x8e/0xa0 [ 30.237936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.238582] remove_vma+0x139/0x170 [ 30.239040] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.239628] do_vmi_munmap+0x1f1/0x2b0 [ 30.240130] __vm_munmap+0x138/0x3a0 [ 30.240600] __x64_sys_munmap+0x59/0x80 [ 30.241104] do_syscall_64+0x3f/0x90 [ 30.241592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.242268] [ 30.242487] The buggy address belongs to the object at ffff88800ecb0cb0 [ 30.242487] which belongs to the cache vm_area_struct of size 168 [ 30.243994] The buggy address is located 88 bytes inside of [ 30.243994] freed 168-byte region [ffff88800ecb0cb0, ffff88800ecb0d58) [ 30.245422] [ 30.245637] The buggy address belongs to the physical page: [ 30.246318] page:000000007dec5788 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecb0 [ 30.247424] memcg:ffff88800eefbe01 [ 30.247878] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.248554] page_type: 0xffffffff() [ 30.249023] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.249949] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eefbe01 [ 30.250865] page dumped because: kasan: bad access detected [ 30.251532] [ 30.251759] Memory state around the buggy address: [ 30.252337] ffff88800ecb0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.253240] ffff88800ecb0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.254108] >ffff88800ecb0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.254959] ^ [ 30.255398] ffff88800ecb0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.256266] ffff88800ecb0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.257166] ================================================================== [ 30.258221] Disabling lock debugging due to kernel taint [ 32.132358] BUG: Bad rss-counter state mm:000000007a689a78 type:MM_FILEPAGES val:33 [ 32.133355] BUG: Bad rss-counter state mm:000000007a689a78 type:MM_ANONPAGES val:22 [ 32.552364] BUG: Bad rss-counter state mm:000000005c15749f type:MM_FILEPAGES val:33 [ 32.553371] BUG: Bad rss-counter state mm:000000005c15749f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1086' (ECDSA) to the list of known hosts. 2023/06/20 17:30:59 fuzzer started 2023/06/20 17:31:00 dialing manager at localhost:36067 2023/06/20 17:31:00 checking machine... 2023/06/20 17:31:00 checking revisions... [ 33.269826] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:31:00 testing simple program... [ 33.312538] cgroup: Unknown subsys name 'net' [ 33.350912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:30:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110028fcef6 RSP=ffff8880147e77a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800fe9f030 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007fa8be698900 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=00007ffee108c000 CR3=000000001a2ce000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b18 RCX=0000000000000001 RDX=1ffff1100d9e1365 RSI=ffffffff8186b835 RDI=ffff88806cf09b28 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a30 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800e97a500 RIP=ffffffff813ad496 RFL=00000286 [--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 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=00007f0578d02550 CR3=000000000c9ba000 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=2039353a30333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a30333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000