syzkaller login: [ 30.548812] BUG: Bad rss-counter state mm:00000000b322ca52 type:MM_FILEPAGES val:33 [ 30.550774] BUG: Bad rss-counter state mm:00000000b322ca52 type:MM_ANONPAGES val:22 [ 30.723796] ================================================================== [ 30.724910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.726002] Read of size 8 at addr ffff88800fe9ba50 by task sshd/220 [ 30.726965] [ 30.727205] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.728154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.729245] Call Trace: [ 30.729601] [ 30.729917] dump_stack_lvl+0x91/0xf0 [ 30.730463] print_report+0xcc/0x620 [ 30.730997] ? __virt_addr_valid+0x102/0x340 [ 30.731609] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.732296] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733010] kasan_report+0xbe/0xf0 [ 30.733542] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734230] vma_interval_tree_remove+0xc75/0xec0 [ 30.734913] vma_prepare+0xc54/0x11a0 [ 30.735453] __split_vma+0x5af/0x950 [ 30.735966] ? __pfx___split_vma+0x10/0x10 [ 30.736537] ? find_held_lock+0x2c/0x110 [ 30.737126] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.737723] ? lock_is_held_type+0x9f/0x120 [ 30.738294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.738946] ? mtree_range_walk+0x632/0x900 [ 30.739532] ? mas_walk+0x5c7/0x7c0 [ 30.740040] do_vmi_munmap+0x1f1/0x2b0 [ 30.740562] mmap_region+0x1f9/0x2660 [ 30.741098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.741655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.742410] ? __pfx_lock_acquire+0x10/0x10 [ 30.742974] ? __pfx_mmap_region+0x10/0x10 [ 30.743561] ? security_mmap_addr+0x7d/0xa0 [ 30.744139] ? get_unmapped_area+0x1f5/0x3f0 [ 30.744756] do_mmap+0x854/0xf00 [ 30.745262] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.745800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746407] ksys_mmap_pgoff+0x3af/0x500 [ 30.746958] do_syscall_64+0x3f/0x90 [ 30.747472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748161] RIP: 0033:0x7f61c31cbd82 [ 30.748646] 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 [ 30.750931] RSP: 002b:00007ffd3dbc4f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61c31cbd82 [ 30.752799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61c2605000 [ 30.753732] RBP: 00007f61c2605000 R08: 0000000000000009 R09: 0000000000001000 [ 30.754678] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af86e31b20 [ 30.755606] R13: 00007ffd3dbc4f80 R14: 00007ffd3dbc4fb0 R15: 00007ffd3dbc5310 [ 30.756559] [ 30.756867] [ 30.757115] Allocated by task 213: [ 30.757591] kasan_save_stack+0x22/0x50 [ 30.758149] kasan_set_track+0x25/0x30 [ 30.758690] __kasan_slab_alloc+0x59/0x70 [ 30.759269] kmem_cache_alloc+0x16b/0x370 [ 30.759840] vm_area_dup+0x20/0x160 [ 30.760341] __split_vma+0x170/0x950 [ 30.760855] split_vma+0xc6/0x110 [ 30.761351] mprotect_fixup+0x8d2/0xb30 [ 30.761905] do_mprotect_pkey+0x87e/0xd40 [ 30.762486] __x64_sys_mprotect+0x78/0xc0 [ 30.763077] do_syscall_64+0x3f/0x90 [ 30.763591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764315] [ 30.764544] Freed by task 210: [ 30.764981] kasan_save_stack+0x22/0x50 [ 30.765546] kasan_set_track+0x25/0x30 [ 30.766093] kasan_save_free_info+0x2b/0x50 [ 30.766662] __kasan_slab_free+0x10a/0x190 [ 30.767250] kmem_cache_free+0x10d/0x4d0 [ 30.767814] rcu_core+0x8c8/0x2860 [ 30.768302] __do_softirq+0x1b7/0x7d4 [ 30.768829] [ 30.769070] Last potentially related work creation: [ 30.769716] kasan_save_stack+0x22/0x50 [ 30.770273] __kasan_record_aux_stack+0x8e/0xa0 [ 30.770905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.771615] remove_vma+0x139/0x170 [ 30.772114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.772727] do_vmi_munmap+0x1f1/0x2b0 [ 30.773270] __vm_munmap+0x138/0x3a0 [ 30.773790] __x64_sys_munmap+0x59/0x80 [ 30.774342] do_syscall_64+0x3f/0x90 [ 30.774863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775573] [ 30.775813] The buggy address belongs to the object at ffff88800fe9b9f8 [ 30.775813] which belongs to the cache vm_area_struct of size 168 [ 30.777450] The buggy address is located 88 bytes inside of [ 30.777450] freed 168-byte region [ffff88800fe9b9f8, ffff88800fe9baa0) [ 30.779011] [ 30.779248] The buggy address belongs to the physical page: [ 30.779982] page:0000000081a816d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe9b [ 30.781188] memcg:ffff888016d8be01 [ 30.781658] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.782368] page_type: 0xffffffff() [ 30.782871] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.783885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d8be01 [ 30.784885] page dumped because: kasan: bad access detected [ 30.785674] [ 30.785915] Memory state around the buggy address: [ 30.786547] ffff88800fe9b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.787491] ffff88800fe9b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.788436] >ffff88800fe9ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.789397] ^ [ 30.790166] ffff88800fe9ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.791111] ffff88800fe9bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.792055] ================================================================== [ 30.793229] Disabling lock debugging due to kernel taint [ 33.034233] BUG: Bad rss-counter state mm:000000008ea39f3d type:MM_FILEPAGES val:33 [ 33.035770] BUG: Bad rss-counter state mm:000000008ea39f3d type:MM_ANONPAGES val:22 [ 33.637526] BUG: Bad rss-counter state mm:000000004d8420a0 type:MM_FILEPAGES val:33 [ 33.638558] BUG: Bad rss-counter state mm:000000004d8420a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46302' (ECDSA) to the list of known hosts. 2023/06/21 07:45:15 fuzzer started 2023/06/21 07:45:15 dialing manager at localhost:36067 2023/06/21 07:45:15 checking machine... 2023/06/21 07:45:15 checking revisions... [ 34.289423] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:45:15 testing simple program... [ 34.342340] cgroup: Unknown subsys name 'net' [ 34.401434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:45:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8120686e RDX=0000000000002068 RSI=0000000000002068 RDI=ffffffff864f1b90 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =0000000000000000 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=000000000000a20c R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9f9b9 R15=ffff888008d9f978 RIP=ffffffff8113077a RFL=00000216 [----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 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=00007ffe60b869e8 CR3=00000000184ce000 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=35343a3730203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035313a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383137 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=dffffc0000000000 RBX=ffff88806cf09a98 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135e RSI=ffff88806cf09b30 RDI=ffffffff813ad720 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800b881b40 R15=ffff88800dce27a0 RIP=ffffffff811303b2 RFL=00000246 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb8b57b9900 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=00007fe6e4a05650 CR3=000000000e7cc000 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=524f4dfb0637698c88443b256fb8fa21 XMM02=ec2efd57dc4c00df000000000011d408 XMM03=2c2dff2033d47612000000000011d4d8 XMM04=e1d541609fb4341500000000000ae988 XMM05=8e635957bc6212b60000000000132b58 XMM06=19e9129bd510f23500000000001319f0 XMM07=fb795ef6d65770560000000000121948 XMM08=2c67c8bc2e329bc3000000000011d478 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000