syzkaller login: [ 30.002453] BUG: Bad rss-counter state mm:000000000bea952a type:MM_FILEPAGES val:33 [ 30.003466] BUG: Bad rss-counter state mm:000000000bea952a type:MM_ANONPAGES val:22 [ 30.173540] ================================================================== [ 30.174446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.175392] Read of size 8 at addr ffff88800f636ed8 by task sshd/220 [ 30.176344] [ 30.176562] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.177429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.178423] Call Trace: [ 30.178752] [ 30.179039] dump_stack_lvl+0x91/0xf0 [ 30.179536] print_report+0xcc/0x620 [ 30.180018] ? __virt_addr_valid+0x102/0x340 [ 30.180577] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.181197] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.181808] kasan_report+0xbe/0xf0 [ 30.182283] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.182926] vma_interval_tree_remove+0xc75/0xec0 [ 30.183529] vma_prepare+0xc54/0x11a0 [ 30.184012] __split_vma+0x5af/0x950 [ 30.184492] ? __pfx___split_vma+0x10/0x10 [ 30.185025] ? find_held_lock+0x2c/0x110 [ 30.185549] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.186116] ? lock_is_held_type+0x9f/0x120 [ 30.186674] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.187281] ? mtree_range_walk+0x632/0x900 [ 30.187839] ? mas_walk+0x5c7/0x7c0 [ 30.188322] do_vmi_munmap+0x1f1/0x2b0 [ 30.188821] mmap_region+0x1f9/0x2660 [ 30.189308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.189816] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.190536] ? __pfx_lock_acquire+0x10/0x10 [ 30.191076] ? __pfx_mmap_region+0x10/0x10 [ 30.191608] ? security_mmap_addr+0x7d/0xa0 [ 30.192149] ? get_unmapped_area+0x1f5/0x3f0 [ 30.192693] do_mmap+0x854/0xf00 [ 30.193139] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.193640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.194203] ksys_mmap_pgoff+0x3af/0x500 [ 30.194724] do_syscall_64+0x3f/0x90 [ 30.195209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195862] RIP: 0033:0x7f24c4d4ed82 [ 30.196325] 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 [ 30.198472] RSP: 002b:00007ffc649f2a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.199405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24c4d4ed82 [ 30.200261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24c4188000 [ 30.201115] RBP: 00007f24c4188000 R08: 0000000000000009 R09: 0000000000001000 [ 30.201971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e89a9cdec0 [ 30.202870] R13: 00007ffc649f2a80 R14: 00007ffc649f2ab0 R15: 00007ffc649f2e10 [ 30.203739] [ 30.204032] [ 30.204247] Allocated by task 213: [ 30.204692] kasan_save_stack+0x22/0x50 [ 30.205214] kasan_set_track+0x25/0x30 [ 30.205722] __kasan_slab_alloc+0x59/0x70 [ 30.206251] kmem_cache_alloc+0x16b/0x370 [ 30.206773] vm_area_dup+0x20/0x160 [ 30.207236] __split_vma+0x170/0x950 [ 30.207709] split_vma+0xc6/0x110 [ 30.208159] mprotect_fixup+0x8d2/0xb30 [ 30.208665] do_mprotect_pkey+0x87e/0xd40 [ 30.209191] __x64_sys_mprotect+0x78/0xc0 [ 30.209722] do_syscall_64+0x3f/0x90 [ 30.210199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.210854] [ 30.211071] Freed by task 213: [ 30.211463] kasan_save_stack+0x22/0x50 [ 30.211973] kasan_set_track+0x25/0x30 [ 30.212465] kasan_save_free_info+0x2b/0x50 [ 30.213002] __kasan_slab_free+0x10a/0x190 [ 30.213541] kmem_cache_free+0x10d/0x4d0 [ 30.214058] rcu_core+0x8c8/0x2860 [ 30.214510] __do_softirq+0x1b7/0x7d4 [ 30.215008] [ 30.215226] Last potentially related work creation: [ 30.215805] kasan_save_stack+0x22/0x50 [ 30.216305] __kasan_record_aux_stack+0x8e/0xa0 [ 30.216883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.217606] remove_vma+0x139/0x170 [ 30.218064] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.218627] do_vmi_munmap+0x1f1/0x2b0 [ 30.219114] __vm_munmap+0x138/0x3a0 [ 30.219581] __x64_sys_munmap+0x59/0x80 [ 30.220088] do_syscall_64+0x3f/0x90 [ 30.220567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.221216] [ 30.221434] The buggy address belongs to the object at ffff88800f636e80 [ 30.221434] which belongs to the cache vm_area_struct of size 168 [ 30.222919] The buggy address is located 88 bytes inside of [ 30.222919] freed 168-byte region [ffff88800f636e80, ffff88800f636f28) [ 30.224307] [ 30.224529] The buggy address belongs to the physical page: [ 30.225203] page:0000000030ae6085 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf636 [ 30.226283] memcg:ffff88801bc5cb01 [ 30.226719] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.227364] page_type: 0xffffffff() [ 30.227813] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.228731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc5cb01 [ 30.229631] page dumped because: kasan: bad access detected [ 30.230296] [ 30.230514] Memory state around the buggy address: [ 30.231103] ffff88800f636d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.231963] ffff88800f636e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.232810] >ffff88800f636e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.233658] ^ [ 30.234377] ffff88800f636f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.235252] ffff88800f636f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.236105] ================================================================== [ 30.237037] Disabling lock debugging due to kernel taint [ 32.226165] BUG: Bad rss-counter state mm:000000002926daf4 type:MM_FILEPAGES val:33 [ 32.227160] BUG: Bad rss-counter state mm:000000002926daf4 type:MM_ANONPAGES val:22 [ 32.777221] BUG: Bad rss-counter state mm:000000007a13c39a type:MM_FILEPAGES val:33 [ 32.778418] BUG: Bad rss-counter state mm:000000007a13c39a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31619' (ECDSA) to the list of known hosts. 2023/06/20 15:33:22 fuzzer started 2023/06/20 15:33:22 dialing manager at localhost:36067 2023/06/20 15:33:22 checking machine... 2023/06/20 15:33:22 checking revisions... [ 33.424605] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:33:22 testing simple program... [ 33.484447] cgroup: Unknown subsys name 'net' [ 33.535465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:22 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800ee6bcf0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff84535d53 RBP=ffff888016ac45f0 RSP=ffff88806ce09dd8 R8 =0000000000000000 R9 =ffffed1002d588d0 R10=ffff888016ac4683 R11=00000000000b6d53 R12=0000000000000202 R13=ffff888016ac4630 R14=ffffffff813782f8 R15=ffff88800ee6bcf0 RIP=ffffffff815343b0 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efe69466900 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=00007efe69fba044 CR3=000000000cb96000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007f8da0049c80 CR3=000000000d856000 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=1587ae9fd8e486aaf84f431235f69b6f XMM02=000000000011b3f8eff9b2d0a8fce9cb XMM03=000000000011b4c82c67c8bc2e329bc3 XMM04=afa219ab0877b00f00000000000ae988 XMM05=ad445b3a261e42380000000000132e70 XMM06=4fda316b135da52b0000000000131f10 XMM07=e042d86d42eb936e00000000001224c8 XMM08=aa99191a02b518c4000000000011b4c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000