syzkaller login: [ 31.050454] BUG: Bad rss-counter state mm:000000009567c504 type:MM_FILEPAGES val:33 [ 31.051886] BUG: Bad rss-counter state mm:000000009567c504 type:MM_ANONPAGES val:22 [ 31.196340] ================================================================== [ 31.197245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.198182] Read of size 8 at addr ffff88801a2c8c20 by task sshd/220 [ 31.199045] [ 31.199270] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.200156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.201174] Call Trace: [ 31.201503] [ 31.201797] dump_stack_lvl+0x91/0xf0 [ 31.202287] print_report+0xcc/0x620 [ 31.202773] ? __virt_addr_valid+0x102/0x340 [ 31.203334] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204577] kasan_report+0xbe/0xf0 [ 31.205054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205696] vma_interval_tree_remove+0xc75/0xec0 [ 31.206307] vma_prepare+0xc54/0x11a0 [ 31.206787] __split_vma+0x5af/0x950 [ 31.207259] ? __pfx___split_vma+0x10/0x10 [ 31.207809] ? find_held_lock+0x2c/0x110 [ 31.208332] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208920] ? lock_is_held_type+0x9f/0x120 [ 31.209472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.210075] ? mtree_range_walk+0x632/0x900 [ 31.210622] ? mas_walk+0x5c7/0x7c0 [ 31.211091] do_vmi_munmap+0x1f1/0x2b0 [ 31.211588] mmap_region+0x1f9/0x2660 [ 31.212064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.212570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213292] ? __pfx_lock_acquire+0x10/0x10 [ 31.213825] ? __pfx_mmap_region+0x10/0x10 [ 31.214353] ? security_mmap_addr+0x7d/0xa0 [ 31.214896] ? get_unmapped_area+0x1f5/0x3f0 [ 31.215465] do_mmap+0x854/0xf00 [ 31.215904] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.217024] ksys_mmap_pgoff+0x3af/0x500 [ 31.217528] do_syscall_64+0x3f/0x90 [ 31.218011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218663] RIP: 0033:0x7fa4c3843d82 [ 31.219124] 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 [ 31.221314] RSP: 002b:00007ffcd69f7c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.222233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4c3843d82 [ 31.223084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4c2c7d000 [ 31.223929] RBP: 00007fa4c2c7d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.224770] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565170480ec0 [ 31.225630] R13: 00007ffcd69f7c30 R14: 00007ffcd69f7c60 R15: 00007ffcd69f7fc0 [ 31.226482] [ 31.226771] [ 31.226985] Allocated by task 213: [ 31.227431] kasan_save_stack+0x22/0x50 [ 31.227935] kasan_set_track+0x25/0x30 [ 31.228427] __kasan_slab_alloc+0x59/0x70 [ 31.228946] kmem_cache_alloc+0x16b/0x370 [ 31.229453] vm_area_dup+0x20/0x160 [ 31.229899] __split_vma+0x170/0x950 [ 31.230368] split_vma+0xc6/0x110 [ 31.230809] mprotect_fixup+0x8d2/0xb30 [ 31.231312] do_mprotect_pkey+0x87e/0xd40 [ 31.231839] __x64_sys_mprotect+0x78/0xc0 [ 31.232367] do_syscall_64+0x3f/0x90 [ 31.232836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233505] [ 31.233729] Freed by task 19: [ 31.234119] kasan_save_stack+0x22/0x50 [ 31.234642] kasan_set_track+0x25/0x30 [ 31.235139] kasan_save_free_info+0x2b/0x50 [ 31.235679] __kasan_slab_free+0x10a/0x190 [ 31.236212] kmem_cache_free+0x10d/0x4d0 [ 31.236714] rcu_core+0x8c8/0x2860 [ 31.237153] __do_softirq+0x1b7/0x7d4 [ 31.237626] [ 31.237838] Last potentially related work creation: [ 31.238425] kasan_save_stack+0x22/0x50 [ 31.238920] __kasan_record_aux_stack+0x8e/0xa0 [ 31.239537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.240173] remove_vma+0x139/0x170 [ 31.240619] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.241167] do_vmi_munmap+0x1f1/0x2b0 [ 31.241652] __vm_munmap+0x138/0x3a0 [ 31.242127] __x64_sys_munmap+0x59/0x80 [ 31.242634] do_syscall_64+0x3f/0x90 [ 31.243122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243801] [ 31.244015] The buggy address belongs to the object at ffff88801a2c8bc8 [ 31.244015] which belongs to the cache vm_area_struct of size 168 [ 31.245524] The buggy address is located 88 bytes inside of [ 31.245524] freed 168-byte region [ffff88801a2c8bc8, ffff88801a2c8c70) [ 31.246948] [ 31.247166] The buggy address belongs to the physical page: [ 31.247875] page:000000007b3864e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2c8 [ 31.249002] memcg:ffff888018204701 [ 31.249440] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.250100] page_type: 0xffffffff() [ 31.250579] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.251521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018204701 [ 31.252421] page dumped because: kasan: bad access detected [ 31.253075] [ 31.253302] Memory state around the buggy address: [ 31.253907] ffff88801a2c8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.254773] ffff88801a2c8b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.255638] >ffff88801a2c8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.256497] ^ [ 31.257034] ffff88801a2c8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.257903] ffff88801a2c8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.258765] ================================================================== [ 31.259908] Disabling lock debugging due to kernel taint [ 33.903431] BUG: Bad rss-counter state mm:0000000083e04b85 type:MM_FILEPAGES val:33 [ 33.904450] BUG: Bad rss-counter state mm:0000000083e04b85 type:MM_ANONPAGES val:22 [ 34.300271] BUG: Bad rss-counter state mm:00000000ef067b6f type:MM_FILEPAGES val:33 [ 34.301006] BUG: Bad rss-counter state mm:00000000ef067b6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18460' (ECDSA) to the list of known hosts. 2023/06/20 22:46:00 fuzzer started 2023/06/20 22:46:00 dialing manager at localhost:36067 2023/06/20 22:46:00 checking machine... 2023/06/20 22:46:00 checking revisions... [ 34.940465] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:46:00 testing simple program... [ 34.997801] cgroup: Unknown subsys name 'net' [ 35.051939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:46:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001b58f40 RCX=0000000080000000 RDX=ffffffff818f6c10 RSI=ffffffff818f6cd3 RDI=0000000000000005 RBP=ffff888008ea3200 RSP=ffff88800dac79c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800dac7a20 R13=0000000000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff814c0871 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 00007fb3db441900 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=00007fb3db9f90b0 CR3=000000000d970000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b08 RCX=0000000000000000 RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=ffff88806cf09ae0 RBP=ffff888008d951c0 RSP=ffff88806cf09a20 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806cf09a70 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09a98 R14=ffff888008d951c0 R15=ffff88806cf09a70 RIP=ffffffff81132ac0 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 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=00007f776bfca180 CR3=000000000f2ee000 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=4304993f9b9379b1a74a700f072f3bf4 XMM02=000000000011a4e8eff9b2d0a8fce9cb XMM03=000000000011a5b82c67c8bc2e329bc3 XMM04=7c010350691323ed00000000000ae988 XMM05=4f99ecd04bc643d10000000000132e50 XMM06=4fda316b135da52b0000000000131ef0 XMM07=e042d86d42eb936e0000000000122420 XMM08=53441156105be453000000000011a5b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000