syzkaller login: [ 31.180991] BUG: Bad rss-counter state mm:0000000001040913 type:MM_FILEPAGES val:33 [ 31.182301] BUG: Bad rss-counter state mm:0000000001040913 type:MM_ANONPAGES val:22 [ 31.220219] ================================================================== [ 31.221180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.222115] Read of size 8 at addr ffff88801a05cdf0 by task sshd/220 [ 31.222828] [ 31.223041] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.223837] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.224736] Call Trace: [ 31.225026] [ 31.225294] dump_stack_lvl+0x91/0xf0 [ 31.225741] print_report+0xcc/0x620 [ 31.226194] ? __virt_addr_valid+0x102/0x340 [ 31.226705] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227296] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227857] kasan_report+0xbe/0xf0 [ 31.228294] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.228865] vma_interval_tree_remove+0xc75/0xec0 [ 31.229427] vma_prepare+0xc54/0x11a0 [ 31.229880] __split_vma+0x5af/0x950 [ 31.230323] ? __pfx___split_vma+0x10/0x10 [ 31.230808] ? find_held_lock+0x2c/0x110 [ 31.231294] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.231823] ? lock_is_held_type+0x9f/0x120 [ 31.232320] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.232886] ? mtree_range_walk+0x632/0x900 [ 31.233401] ? mas_walk+0x5c7/0x7c0 [ 31.233836] do_vmi_munmap+0x1f1/0x2b0 [ 31.234300] mmap_region+0x1f9/0x2660 [ 31.234750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.235229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235899] ? __pfx_lock_acquire+0x10/0x10 [ 31.236394] ? __pfx_mmap_region+0x10/0x10 [ 31.236894] ? security_mmap_addr+0x7d/0xa0 [ 31.237394] ? get_unmapped_area+0x1f5/0x3f0 [ 31.237912] do_mmap+0x854/0xf00 [ 31.238313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.238777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239313] ksys_mmap_pgoff+0x3af/0x500 [ 31.239775] do_syscall_64+0x3f/0x90 [ 31.240216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240815] RIP: 0033:0x7fdb4432ad82 [ 31.241241] 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 [ 31.243211] RSP: 002b:00007ffe6e757428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.244049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb4432ad82 [ 31.244845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb43764000 [ 31.245626] RBP: 00007fdb43764000 R08: 0000000000000009 R09: 0000000000001000 [ 31.246428] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561beabaeec0 [ 31.247224] R13: 00007ffe6e757440 R14: 00007ffe6e757470 R15: 00007ffe6e7577d0 [ 31.248034] [ 31.248305] [ 31.248508] Allocated by task 213: [ 31.248913] kasan_save_stack+0x22/0x50 [ 31.249375] kasan_set_track+0x25/0x30 [ 31.249832] __kasan_slab_alloc+0x59/0x70 [ 31.250309] kmem_cache_alloc+0x16b/0x370 [ 31.250781] vm_area_dup+0x20/0x160 [ 31.251225] __split_vma+0x170/0x950 [ 31.251656] split_vma+0xc6/0x110 [ 31.252062] mprotect_fixup+0x8d2/0xb30 [ 31.252520] do_mprotect_pkey+0x87e/0xd40 [ 31.252999] __x64_sys_mprotect+0x78/0xc0 [ 31.253482] do_syscall_64+0x3f/0x90 [ 31.253922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254516] [ 31.254714] Freed by task 213: [ 31.255088] kasan_save_stack+0x22/0x50 [ 31.255554] kasan_set_track+0x25/0x30 [ 31.256009] kasan_save_free_info+0x2b/0x50 [ 31.256503] __kasan_slab_free+0x10a/0x190 [ 31.256999] kmem_cache_free+0x10d/0x4d0 [ 31.257472] rcu_core+0x8c8/0x2860 [ 31.257885] __do_softirq+0x1b7/0x7d4 [ 31.258328] [ 31.258525] Last potentially related work creation: [ 31.259072] kasan_save_stack+0x22/0x50 [ 31.259542] __kasan_record_aux_stack+0x8e/0xa0 [ 31.260076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.260675] remove_vma+0x139/0x170 [ 31.261095] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.261620] do_vmi_munmap+0x1f1/0x2b0 [ 31.262073] __vm_munmap+0x138/0x3a0 [ 31.262504] __x64_sys_munmap+0x59/0x80 [ 31.262997] do_syscall_64+0x3f/0x90 [ 31.263440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264041] [ 31.264240] The buggy address belongs to the object at ffff88801a05cd98 [ 31.264240] which belongs to the cache vm_area_struct of size 168 [ 31.265603] The buggy address is located 88 bytes inside of [ 31.265603] freed 168-byte region [ffff88801a05cd98, ffff88801a05ce40) [ 31.266914] [ 31.267114] The buggy address belongs to the physical page: [ 31.267734] page:0000000023ffa8d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a05c [ 31.268755] memcg:ffff88800edf3b01 [ 31.269156] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.269753] page_type: 0xffffffff() [ 31.270167] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.271051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf3b01 [ 31.271891] page dumped because: kasan: bad access detected [ 31.272503] [ 31.272705] Memory state around the buggy address: [ 31.273252] ffff88801a05cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.274050] ffff88801a05cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.274847] >ffff88801a05cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.275653] ^ [ 31.276410] ffff88801a05ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.277208] ffff88801a05ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.277995] ================================================================== [ 31.278963] Disabling lock debugging due to kernel taint [ 32.852642] BUG: Bad rss-counter state mm:000000000fdd3c14 type:MM_FILEPAGES val:33 [ 32.853639] BUG: Bad rss-counter state mm:000000000fdd3c14 type:MM_ANONPAGES val:22 [ 33.347226] BUG: Bad rss-counter state mm:000000002a2e3c95 type:MM_FILEPAGES val:33 [ 33.348491] BUG: Bad rss-counter state mm:000000002a2e3c95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13753' (ECDSA) to the list of known hosts. 2023/06/20 13:08:29 fuzzer started 2023/06/20 13:08:30 dialing manager at localhost:36067 2023/06/20 13:08:30 checking machine... 2023/06/20 13:08:30 checking revisions... [ 34.075372] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:08:30 testing simple program... [ 34.115485] cgroup: Unknown subsys name 'net' [ 34.153472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:08:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff864bd701 RDX=1ffff1100d9c1353 RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a80 R8 =ffffffff864bd7f0 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800f50ec60 RIP=ffffffff8113037f RFL=00000202 [-------] 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 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=00007ffc97f9e5a8 CR3=0000000005482000 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=00007f877593a51000005572616c5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=00000000000080c6 RDI=ffff88800fb7f578 RBP=ffff88800fb7f5d0 RSP=ffff88800fb7f508 R8 =ffffffff860d825a R9 =ffff88800fb7f5b8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800fb7f5d8 R13=ffff88800fb7f5c0 R14=ffff88800fb7f5b9 R15=ffff88800fb7f578 RIP=ffffffff81130754 RFL=00000287 [--S--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 00007fa24f614700 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=00007fe257224a40 CR3=000000000e508000 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=2039323a38303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a38303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000