syzkaller login: [ 31.387718] BUG: Bad rss-counter state mm:000000009c78af10 type:MM_FILEPAGES val:33 [ 31.388713] BUG: Bad rss-counter state mm:000000009c78af10 type:MM_ANONPAGES val:22 [ 31.555606] ================================================================== [ 31.556546] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.557490] Read of size 8 at addr ffff8880168516b0 by task sshd/220 [ 31.558262] [ 31.558484] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.559541] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.560541] Call Trace: [ 31.560866] <TASK> [ 31.561166] dump_stack_lvl+0x91/0xf0 [ 31.561686] print_report+0xcc/0x620 [ 31.562186] ? __virt_addr_valid+0x102/0x340 [ 31.562767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.563394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564011] kasan_report+0xbe/0xf0 [ 31.564524] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.565168] vma_interval_tree_remove+0xc75/0xec0 [ 31.565780] vma_prepare+0xc54/0x11a0 [ 31.566278] __split_vma+0x5af/0x950 [ 31.566761] ? __pfx___split_vma+0x10/0x10 [ 31.567308] ? find_held_lock+0x2c/0x110 [ 31.567833] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.568417] ? lock_is_held_type+0x9f/0x120 [ 31.568954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.569579] ? mtree_range_walk+0x632/0x900 [ 31.570146] ? mas_walk+0x5c7/0x7c0 [ 31.570649] do_vmi_munmap+0x1f1/0x2b0 [ 31.571161] mmap_region+0x1f9/0x2660 [ 31.571643] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.572176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.572885] ? __pfx_lock_acquire+0x10/0x10 [ 31.573429] ? __pfx_mmap_region+0x10/0x10 [ 31.573958] ? security_mmap_addr+0x7d/0xa0 [ 31.574503] ? get_unmapped_area+0x1f5/0x3f0 [ 31.575100] do_mmap+0x854/0xf00 [ 31.575544] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.576038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.576631] ksys_mmap_pgoff+0x3af/0x500 [ 31.577151] do_syscall_64+0x3f/0x90 [ 31.577625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.578281] RIP: 0033:0x7ff6c7d61d82 [ 31.578746] 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 [ 31.580895] RSP: 002b:00007fff0d965478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.581813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6c7d61d82 [ 31.582691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6c719b000 [ 31.583541] RBP: 00007ff6c719b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.584400] R10: 0000000000000812 R11: 0000000000000206 R12: 000055644ebeab20 [ 31.585264] R13: 00007fff0d965490 R14: 00007fff0d9654c0 R15: 00007fff0d965820 [ 31.586134] </TASK> [ 31.586430] [ 31.586666] Allocated by task 213: [ 31.587108] kasan_save_stack+0x22/0x50 [ 31.587608] kasan_set_track+0x25/0x30 [ 31.588118] __kasan_slab_alloc+0x59/0x70 [ 31.588642] kmem_cache_alloc+0x16b/0x370 [ 31.589187] vm_area_dup+0x20/0x160 [ 31.589650] __split_vma+0x170/0x950 [ 31.590123] split_vma+0xc6/0x110 [ 31.590560] mprotect_fixup+0x8d2/0xb30 [ 31.591100] do_mprotect_pkey+0x87e/0xd40 [ 31.591625] __x64_sys_mprotect+0x78/0xc0 [ 31.592151] do_syscall_64+0x3f/0x90 [ 31.592621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.593282] [ 31.593501] Freed by task 213: [ 31.593900] kasan_save_stack+0x22/0x50 [ 31.594416] kasan_set_track+0x25/0x30 [ 31.594917] kasan_save_free_info+0x2b/0x50 [ 31.595465] __kasan_slab_free+0x10a/0x190 [ 31.596007] kmem_cache_free+0x10d/0x4d0 [ 31.596534] rcu_core+0x8c8/0x2860 [ 31.596974] __do_softirq+0x1b7/0x7d4 [ 31.597469] [ 31.597685] Last potentially related work creation: [ 31.598283] kasan_save_stack+0x22/0x50 [ 31.598794] __kasan_record_aux_stack+0x8e/0xa0 [ 31.599382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.600031] remove_vma+0x139/0x170 [ 31.600541] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.601122] do_vmi_munmap+0x1f1/0x2b0 [ 31.601613] __vm_munmap+0x138/0x3a0 [ 31.602095] __x64_sys_munmap+0x59/0x80 [ 31.602599] do_syscall_64+0x3f/0x90 [ 31.603093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603733] [ 31.603946] The buggy address belongs to the object at ffff888016851658 [ 31.603946] which belongs to the cache vm_area_struct of size 168 [ 31.605434] The buggy address is located 88 bytes inside of [ 31.605434] freed 168-byte region [ffff888016851658, ffff888016851700) [ 31.606872] [ 31.607105] The buggy address belongs to the physical page: [ 31.607751] page:000000000d4c40eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16851 [ 31.608850] memcg:ffff88800ec2f101 [ 31.609303] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.609946] page_type: 0xffffffff() [ 31.610418] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.611367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec2f101 [ 31.612282] page dumped because: kasan: bad access detected [ 31.612939] [ 31.613183] Memory state around the buggy address: [ 31.613771] ffff888016851580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.614654] ffff888016851600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.615517] >ffff888016851680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.616380] ^ [ 31.616958] ffff888016851700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.617826] ffff888016851780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.618704] ================================================================== [ 31.619649] Disabling lock debugging due to kernel taint [ 33.841082] BUG: Bad rss-counter state mm:0000000009586cec type:MM_FILEPAGES val:33 [ 33.842181] BUG: Bad rss-counter state mm:0000000009586cec type:MM_ANONPAGES val:22 [ 34.315918] BUG: Bad rss-counter state mm:00000000a923650c type:MM_FILEPAGES val:33 [ 34.317317] BUG: Bad rss-counter state mm:00000000a923650c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38644' (ECDSA) to the list of known hosts. 2023/06/19 15:38:30 fuzzer started 2023/06/19 15:38:30 dialing manager at localhost:44161 2023/06/19 15:38:30 checking machine... 2023/06/19 15:38:30 checking revisions... [ 35.035580] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:38:30 testing simple program... [ 35.092674] cgroup: Unknown subsys name 'net' [ 35.140418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:27 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000d40 RSI=0000000000000010 RDI=ffff888016bf77e0 RBP=ffff88800bb8a640 RSP=ffff888016bf76f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000d40 R14=ffff888016bf7760 R15=0000000000000d40 RIP=ffffffff813ad61a RFL=00000286 [--S--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 00007f5842424700 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=00007fafd9794630 CR3=0000000019212000 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=2030333a38333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a38333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135b RSI=ffff88806cf09a68 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007f2620355900 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=00007f2620334020 CR3=0000000018574000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000