syzkaller login: [ 34.386866] BUG: Bad rss-counter state mm:000000004de40926 type:MM_FILEPAGES val:33 [ 34.388557] BUG: Bad rss-counter state mm:000000004de40926 type:MM_ANONPAGES val:22 [ 34.554013] ================================================================== [ 34.555127] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.556312] Read of size 8 at addr ffff88800e491140 by task sshd/222 [ 34.557326] [ 34.557546] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.558410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.559393] Call Trace: [ 34.559712] [ 34.560014] dump_stack_lvl+0x91/0xf0 [ 34.560505] print_report+0xcc/0x620 [ 34.560981] ? __virt_addr_valid+0x102/0x340 [ 34.561540] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.562164] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.562784] kasan_report+0xbe/0xf0 [ 34.563257] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.563890] vma_interval_tree_remove+0xc75/0xec0 [ 34.564500] vma_prepare+0xc54/0x11a0 [ 34.564974] __split_vma+0x5af/0x950 [ 34.565449] ? __pfx___split_vma+0x10/0x10 [ 34.565979] ? find_held_lock+0x2c/0x110 [ 34.566503] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.567074] ? lock_is_held_type+0x9f/0x120 [ 34.567614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.568249] ? mtree_range_walk+0x632/0x900 [ 34.568797] ? mas_walk+0x5c7/0x7c0 [ 34.569270] do_vmi_munmap+0x1f1/0x2b0 [ 34.569763] mmap_region+0x1f9/0x2660 [ 34.570245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.570761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.571475] ? __pfx_lock_acquire+0x10/0x10 [ 34.572018] ? __pfx_mmap_region+0x10/0x10 [ 34.572548] ? security_mmap_addr+0x7d/0xa0 [ 34.573079] ? get_unmapped_area+0x1f5/0x3f0 [ 34.573631] do_mmap+0x854/0xf00 [ 34.574077] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.574584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.575146] ksys_mmap_pgoff+0x3af/0x500 [ 34.575650] do_syscall_64+0x3f/0x90 [ 34.576133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.576794] RIP: 0033:0x7f2d49fe9d82 [ 34.577254] 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 [ 34.579380] RSP: 002b:00007ffd3f189268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.580302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d49fe9d82 [ 34.581146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d49423000 [ 34.581993] RBP: 00007f2d49423000 R08: 0000000000000009 R09: 0000000000001000 [ 34.582844] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b581236ec0 [ 34.583692] R13: 00007ffd3f189280 R14: 00007ffd3f1892b0 R15: 00007ffd3f189610 [ 34.584549] [ 34.584840] [ 34.585056] Allocated by task 214: [ 34.585490] kasan_save_stack+0x22/0x50 [ 34.586001] kasan_set_track+0x25/0x30 [ 34.586505] __kasan_slab_alloc+0x59/0x70 [ 34.587027] kmem_cache_alloc+0x16b/0x370 [ 34.587538] vm_area_dup+0x20/0x160 [ 34.588022] __split_vma+0x170/0x950 [ 34.588491] split_vma+0xc6/0x110 [ 34.588930] mprotect_fixup+0x8d2/0xb30 [ 34.589438] do_mprotect_pkey+0x87e/0xd40 [ 34.589960] __x64_sys_mprotect+0x78/0xc0 [ 34.590478] do_syscall_64+0x3f/0x90 [ 34.590951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.591602] [ 34.591815] Freed by task 13: [ 34.592211] kasan_save_stack+0x22/0x50 [ 34.592714] kasan_set_track+0x25/0x30 [ 34.593218] kasan_save_free_info+0x2b/0x50 [ 34.593746] __kasan_slab_free+0x10a/0x190 [ 34.594298] kmem_cache_free+0x10d/0x4d0 [ 34.594813] rcu_core+0x8c8/0x2860 [ 34.595258] __do_softirq+0x1b7/0x7d4 [ 34.595732] [ 34.595957] Last potentially related work creation: [ 34.596544] kasan_save_stack+0x22/0x50 [ 34.597051] __kasan_record_aux_stack+0x8e/0xa0 [ 34.597623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.598258] remove_vma+0x139/0x170 [ 34.598707] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.599259] do_vmi_munmap+0x1f1/0x2b0 [ 34.599744] __vm_munmap+0x138/0x3a0 [ 34.600231] __x64_sys_munmap+0x59/0x80 [ 34.600732] do_syscall_64+0x3f/0x90 [ 34.601209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.601847] [ 34.602065] The buggy address belongs to the object at ffff88800e4910e8 [ 34.602065] which belongs to the cache vm_area_struct of size 168 [ 34.603523] The buggy address is located 88 bytes inside of [ 34.603523] freed 168-byte region [ffff88800e4910e8, ffff88800e491190) [ 34.604920] [ 34.605141] The buggy address belongs to the physical page: [ 34.605795] page:000000008a47ea55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe491 [ 34.606869] memcg:ffff88800e815701 [ 34.607301] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.608022] page_type: 0xffffffff() [ 34.608482] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3300 dead000000000007 [ 34.609423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e815701 [ 34.610326] page dumped because: kasan: bad access detected [ 34.610984] [ 34.611204] Memory state around the buggy address: [ 34.611783] ffff88800e491000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.612654] ffff88800e491080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.613512] >ffff88800e491100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.614365] ^ [ 34.614997] ffff88800e491180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.615862] ffff88800e491200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.616724] ================================================================== [ 34.617861] Disabling lock debugging due to kernel taint [ 36.647264] BUG: Bad rss-counter state mm:0000000042f6993a type:MM_FILEPAGES val:33 [ 36.648445] BUG: Bad rss-counter state mm:0000000042f6993a type:MM_ANONPAGES val:22 [ 37.038581] BUG: Bad rss-counter state mm:000000004575c85e type:MM_FILEPAGES val:33 [ 37.040267] BUG: Bad rss-counter state mm:000000004575c85e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34170' (ECDSA) to the list of known hosts. 2023/06/20 05:55:15 fuzzer started 2023/06/20 05:55:15 dialing manager at localhost:44161 2023/06/20 05:55:15 checking machine... 2023/06/20 05:55:15 checking revisions... [ 37.784918] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:55:15 testing simple program... [ 37.836179] cgroup: Unknown subsys name 'net' [ 37.878095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:55:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff888017b776e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008441500 R13=0000000000000820 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 00007fb58dd52700 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=00007ff134b180b0 CR3=0000000019cca000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3233325b646873732035313a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343239 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f7b48e4b018 RBX=000055e4c961fd60 RCX=000055e4c9630630 RDX=000055e4c9627870 RSI=00007fff83b81520 RDI=000055e4c9627330 RBP=0000000000000006 RSP=00007fff83b81430 R8 =0000000000000001 R9 =0000000000134018 R10=0000000000000002 R11=00007f7b48e4cd10 R12=000055e4c9630630 R13=0000000000134018 R14=0000000000134018 R15=0000000000000000 RIP=00007f7b4a4be8ff RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7b4992c900 00000000 00000000 GS =0000 0000000000000000 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=00007f7b48da2df8 CR3=000000000da54000 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=b3285ca56c489dff000000000010dbf0 XMM01=0f189ffbaaa79696f842fa0ec3c6083a XMM02=ec2efd57dc4c00df000000000011deb8 XMM03=b885f022952a4cf2000000000011df88 XMM04=1ce2d62eedd108da00000000000ae988 XMM05=7793c09e15e6cca500000000001355c8 XMM06=db20f175d54767f00000000000134668 XMM07=e042d86d42eb936e00000000001247b8 XMM08=b885f022952a4cf2000000000011df88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000