syzkaller login: [ 31.635411] BUG: Bad rss-counter state mm:00000000b1de3449 type:MM_FILEPAGES val:33 [ 31.636157] BUG: Bad rss-counter state mm:00000000b1de3449 type:MM_ANONPAGES val:22 [ 31.767744] ================================================================== [ 31.768448] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.769112] Read of size 8 at addr ffff88800ed84ed8 by task sshd/222 [ 31.769653] [ 31.769804] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.770401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.771062] Call Trace: [ 31.771291] [ 31.771493] dump_stack_lvl+0x91/0xf0 [ 31.772004] print_report+0xcc/0x620 [ 31.772366] ? __virt_addr_valid+0x102/0x340 [ 31.772742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773551] kasan_report+0xbe/0xf0 [ 31.773860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.774325] vma_interval_tree_remove+0xc75/0xec0 [ 31.774733] vma_prepare+0xc54/0x11a0 [ 31.775066] __split_vma+0x5af/0x950 [ 31.775412] ? __pfx___split_vma+0x10/0x10 [ 31.775782] ? find_held_lock+0x2c/0x110 [ 31.776140] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.776544] ? lock_is_held_type+0x9f/0x120 [ 31.776887] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.777279] ? mtree_range_walk+0x632/0x900 [ 31.777666] ? mas_walk+0x5c7/0x7c0 [ 31.777990] do_vmi_munmap+0x1f1/0x2b0 [ 31.778334] mmap_region+0x1f9/0x2660 [ 31.778674] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.779016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.779505] ? __pfx_lock_acquire+0x10/0x10 [ 31.779858] ? __pfx_mmap_region+0x10/0x10 [ 31.780191] ? security_mmap_addr+0x7d/0xa0 [ 31.780587] ? get_unmapped_area+0x1f5/0x3f0 [ 31.780950] do_mmap+0x854/0xf00 [ 31.781245] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.781596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.781985] ksys_mmap_pgoff+0x3af/0x500 [ 31.782314] do_syscall_64+0x3f/0x90 [ 31.782623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.783042] RIP: 0033:0x7f672559ed82 [ 31.783337] 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 [ 31.784800] RSP: 002b:00007ffdf6f9b388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.785430] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f672559ed82 [ 31.786015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67249d8000 [ 31.786586] RBP: 00007f67249d8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.787154] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1df5c8980 [ 31.787748] R13: 00007ffdf6f9b3a0 R14: 00007ffdf6f9b3d0 R15: 00007ffdf6f9b730 [ 31.788437] [ 31.788635] [ 31.788773] Allocated by task 213: [ 31.789065] kasan_save_stack+0x22/0x50 [ 31.789413] kasan_set_track+0x25/0x30 [ 31.789769] __kasan_slab_alloc+0x59/0x70 [ 31.790134] kmem_cache_alloc+0x16b/0x370 [ 31.790492] vm_area_dup+0x20/0x160 [ 31.790811] __split_vma+0x170/0x950 [ 31.791127] split_vma+0xc6/0x110 [ 31.791436] mprotect_fixup+0x8d2/0xb30 [ 31.791783] do_mprotect_pkey+0x87e/0xd40 [ 31.792135] __x64_sys_mprotect+0x78/0xc0 [ 31.792512] do_syscall_64+0x3f/0x90 [ 31.792840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.793270] [ 31.793415] Freed by task 203: [ 31.793674] kasan_save_stack+0x22/0x50 [ 31.794024] kasan_set_track+0x25/0x30 [ 31.794392] kasan_save_free_info+0x2b/0x50 [ 31.794765] __kasan_slab_free+0x10a/0x190 [ 31.795138] kmem_cache_free+0x10d/0x4d0 [ 31.795491] rcu_core+0x8c8/0x2860 [ 31.795799] __do_softirq+0x1b7/0x7d4 [ 31.796144] [ 31.796334] Last potentially related work creation: [ 31.796741] kasan_save_stack+0x22/0x50 [ 31.797091] __kasan_record_aux_stack+0x8e/0xa0 [ 31.797496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.797941] remove_vma+0x139/0x170 [ 31.798257] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.798652] do_vmi_munmap+0x1f1/0x2b0 [ 31.798996] __vm_munmap+0x138/0x3a0 [ 31.799328] __x64_sys_munmap+0x59/0x80 [ 31.799674] do_syscall_64+0x3f/0x90 [ 31.800006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.800502] [ 31.800655] The buggy address belongs to the object at ffff88800ed84e80 [ 31.800655] which belongs to the cache vm_area_struct of size 168 [ 31.801685] The buggy address is located 88 bytes inside of [ 31.801685] freed 168-byte region [ffff88800ed84e80, ffff88800ed84f28) [ 31.802651] [ 31.802804] The buggy address belongs to the physical page: [ 31.803255] page:000000007a2ae740 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed84 [ 31.804013] memcg:ffff88800e75d201 [ 31.804350] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.804803] page_type: 0xffffffff() [ 31.805123] raw: 0100000000000200 ffff8880087a0c80 ffffea0000396500 dead000000000006 [ 31.805751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e75d201 [ 31.806388] page dumped because: kasan: bad access detected [ 31.806856] [ 31.807003] Memory state around the buggy address: [ 31.807418] ffff88800ed84d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.808023] ffff88800ed84e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.808720] >ffff88800ed84e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.809300] ^ [ 31.809804] ffff88800ed84f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.810409] ffff88800ed84f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.811021] ================================================================== [ 31.811773] Disabling lock debugging due to kernel taint [ 33.787635] BUG: Bad rss-counter state mm:00000000aca534fa type:MM_FILEPAGES val:33 [ 33.788423] BUG: Bad rss-counter state mm:00000000aca534fa type:MM_ANONPAGES val:22 [ 34.173767] BUG: Bad rss-counter state mm:00000000b81f8c01 type:MM_FILEPAGES val:33 [ 34.174468] BUG: Bad rss-counter state mm:00000000b81f8c01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42084' (ECDSA) to the list of known hosts. 2023/06/21 08:57:02 fuzzer started 2023/06/21 08:57:02 dialing manager at localhost:36067 2023/06/21 08:57:02 checking machine... 2023/06/21 08:57:02 checking revisions... [ 34.782828] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:57:02 testing simple program... [ 34.819424] cgroup: Unknown subsys name 'net' [ 34.856767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:02 Registers: info registers vcpu 0 RAX=ffffffff8186c183 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8186c183 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000024253 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880102151c0 R15=ffff8880096ef1b0 RIP=ffffffff813ad474 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 00007f0199db0900 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=00007ffe98f0b000 CR3=0000000014792000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffd40000e09b0 RBX=dffffc0000000000 RCX=ffffffff81b3372f RDX=fffff940000e09b1 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea0000704d80 RSP=ffff88800f3df250 R8 =0000000000000000 R9 =fffff940000e09b0 R10=ffffea0000704d87 R11=0000000000000128 R12=ffff88800f3df638 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0430 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 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=00007f019a367618 CR3=0000000014792000 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=563412feff00545000000000000080fe 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