syzkaller login: [ 39.127195] BUG: Bad rss-counter state mm:000000009f8b9df1 type:MM_FILEPAGES val:33 [ 39.128503] BUG: Bad rss-counter state mm:000000009f8b9df1 type:MM_ANONPAGES val:22 [ 39.173504] ================================================================== [ 39.174576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.175912] Read of size 8 at addr ffff88800d7136b0 by task sshd/220 [ 39.176767] [ 39.177001] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.177925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.178950] Call Trace: [ 39.179285] [ 39.179586] dump_stack_lvl+0x91/0xf0 [ 39.180126] print_report+0xcc/0x620 [ 39.180637] ? __virt_addr_valid+0x102/0x340 [ 39.181228] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.181881] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.182531] kasan_report+0xbe/0xf0 [ 39.183037] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.183694] vma_interval_tree_remove+0xc75/0xec0 [ 39.184349] vma_prepare+0xc54/0x11a0 [ 39.184864] __split_vma+0x5af/0x950 [ 39.185366] ? __pfx___split_vma+0x10/0x10 [ 39.185931] ? find_held_lock+0x2c/0x110 [ 39.186485] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.187088] ? lock_is_held_type+0x9f/0x120 [ 39.187656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.188319] ? mtree_range_walk+0x632/0x900 [ 39.188909] ? mas_walk+0x5c7/0x7c0 [ 39.189410] do_vmi_munmap+0x1f1/0x2b0 [ 39.189933] mmap_region+0x1f9/0x2660 [ 39.190443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.190987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.191742] ? __pfx_lock_acquire+0x10/0x10 [ 39.192321] ? __pfx_mmap_region+0x10/0x10 [ 39.192887] ? security_mmap_addr+0x7d/0xa0 [ 39.193451] ? get_unmapped_area+0x1f5/0x3f0 [ 39.194039] do_mmap+0x854/0xf00 [ 39.194513] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.195041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.195634] ksys_mmap_pgoff+0x3af/0x500 [ 39.196183] do_syscall_64+0x3f/0x90 [ 39.196699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.197393] RIP: 0033:0x7f3d359aad82 [ 39.197884] 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 [ 39.200156] RSP: 002b:00007ffd44dca8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.201119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d359aad82 [ 39.202019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d34de4000 [ 39.202923] RBP: 00007f3d34de4000 R08: 0000000000000009 R09: 0000000000001000 [ 39.203821] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb8090ab20 [ 39.204709] R13: 00007ffd44dca8e0 R14: 00007ffd44dca910 R15: 00007ffd44dcac70 [ 39.205621] [ 39.205929] [ 39.206159] Allocated by task 213: [ 39.206615] kasan_save_stack+0x22/0x50 [ 39.207151] kasan_set_track+0x25/0x30 [ 39.207677] __kasan_slab_alloc+0x59/0x70 [ 39.208240] kmem_cache_alloc+0x16b/0x370 [ 39.208786] vm_area_dup+0x20/0x160 [ 39.209267] __split_vma+0x170/0x950 [ 39.209760] split_vma+0xc6/0x110 [ 39.210223] mprotect_fixup+0x8d2/0xb30 [ 39.210763] do_mprotect_pkey+0x87e/0xd40 [ 39.211314] __x64_sys_mprotect+0x78/0xc0 [ 39.211877] do_syscall_64+0x3f/0x90 [ 39.212401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.213109] [ 39.213345] Freed by task 213: [ 39.213775] kasan_save_stack+0x22/0x50 [ 39.214332] kasan_set_track+0x25/0x30 [ 39.214880] kasan_save_free_info+0x2b/0x50 [ 39.215447] __kasan_slab_free+0x10a/0x190 [ 39.216018] kmem_cache_free+0x10d/0x4d0 [ 39.216643] rcu_core+0x8c8/0x2860 [ 39.217122] __do_softirq+0x1b7/0x7d4 [ 39.217636] [ 39.217867] Last potentially related work creation: [ 39.218514] kasan_save_stack+0x22/0x50 [ 39.219050] __kasan_record_aux_stack+0x8e/0xa0 [ 39.219668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.220377] remove_vma+0x139/0x170 [ 39.220860] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.221455] do_vmi_munmap+0x1f1/0x2b0 [ 39.221976] __vm_munmap+0x138/0x3a0 [ 39.222477] __x64_sys_munmap+0x59/0x80 [ 39.223011] do_syscall_64+0x3f/0x90 [ 39.223522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.224221] [ 39.224457] The buggy address belongs to the object at ffff88800d713658 [ 39.224457] which belongs to the cache vm_area_struct of size 168 [ 39.226034] The buggy address is located 88 bytes inside of [ 39.226034] freed 168-byte region [ffff88800d713658, ffff88800d713700) [ 39.227541] [ 39.227794] The buggy address belongs to the physical page: [ 39.228497] page:0000000098a55105 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd713 [ 39.229666] memcg:ffff888019952901 [ 39.230126] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.230817] page_type: 0xffffffff() [ 39.231296] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.232294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019952901 [ 39.233269] page dumped because: kasan: bad access detected [ 39.233975] [ 39.234208] Memory state around the buggy address: [ 39.234830] ffff88800d713580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.235747] ffff88800d713600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.236676] >ffff88800d713680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.237591] ^ [ 39.238219] ffff88800d713700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.239136] ffff88800d713780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.240072] ================================================================== [ 39.241179] Disabling lock debugging due to kernel taint [ 41.208390] BUG: Bad rss-counter state mm:000000009458f2c1 type:MM_FILEPAGES val:33 [ 41.210139] BUG: Bad rss-counter state mm:000000009458f2c1 type:MM_ANONPAGES val:22 [ 41.800094] BUG: Bad rss-counter state mm:00000000b2830476 type:MM_FILEPAGES val:33 [ 41.801352] BUG: Bad rss-counter state mm:00000000b2830476 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48671' (ECDSA) to the list of known hosts. 2023/06/21 05:59:34 fuzzer started 2023/06/21 05:59:34 dialing manager at localhost:36067 2023/06/21 05:59:35 checking machine... 2023/06/21 05:59:35 checking revisions... [ 42.484328] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:59:35 testing simple program... [ 42.535247] cgroup: Unknown subsys name 'net' [ 42.584592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:59:34 Registers: info registers vcpu 0 RAX=ffffffff86098092 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c24 RSP=ffff88800fdbf118 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 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 00007f48c1f66900 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=00007f48c251d618 CR3=000000000f63a000 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=00007f44b6ae41f0 CR3=000000000d56c000 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=39afefc3ee1e60b829434f0d2e05277e XMM02=000000000011b3e0eff9b2d0a8fce9cb XMM03=000000000011b4b02c67c8bc2e329bc3 XMM04=4ef6820a7dd4603300000000000ae988 XMM05=19e9129bd510f2350000000000131a18 XMM06=4fda316b135da52b00000000001318a0 XMM07=e042d86d42eb936e00000000001220e8 XMM08=d6067bb7c0bdf96a000000000011b4b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000