syzkaller login: [ 33.127288] BUG: Bad rss-counter state mm:0000000076257e7c type:MM_FILEPAGES val:33 [ 33.128550] BUG: Bad rss-counter state mm:0000000076257e7c type:MM_ANONPAGES val:22 [ 33.199643] ================================================================== [ 33.200553] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.201501] Read of size 8 at addr ffff888019dff880 by task sshd/220 [ 33.202269] [ 33.202509] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.203755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.204750] Call Trace: [ 33.205078] [ 33.205375] dump_stack_lvl+0x91/0xf0 [ 33.205881] print_report+0xcc/0x620 [ 33.206375] ? __virt_addr_valid+0x102/0x340 [ 33.206935] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.207586] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.208228] kasan_report+0xbe/0xf0 [ 33.208722] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.209353] vma_interval_tree_remove+0xc75/0xec0 [ 33.209976] vma_prepare+0xc54/0x11a0 [ 33.210477] __split_vma+0x5af/0x950 [ 33.210959] ? __pfx___split_vma+0x10/0x10 [ 33.211513] ? find_held_lock+0x2c/0x110 [ 33.212078] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.212670] ? lock_is_held_type+0x9f/0x120 [ 33.213220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.213850] ? mtree_range_walk+0x632/0x900 [ 33.214427] ? mas_walk+0x5c7/0x7c0 [ 33.214910] do_vmi_munmap+0x1f1/0x2b0 [ 33.215428] mmap_region+0x1f9/0x2660 [ 33.215939] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.216473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.217212] ? __pfx_lock_acquire+0x10/0x10 [ 33.217768] ? __pfx_mmap_region+0x10/0x10 [ 33.218316] ? security_mmap_addr+0x7d/0xa0 [ 33.218867] ? get_unmapped_area+0x1f5/0x3f0 [ 33.219427] do_mmap+0x854/0xf00 [ 33.219881] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.220393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.220961] ksys_mmap_pgoff+0x3af/0x500 [ 33.221491] do_syscall_64+0x3f/0x90 [ 33.221974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.222637] RIP: 0033:0x7f7f8379bd82 [ 33.223099] 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 [ 33.225289] RSP: 002b:00007ffeb558d0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.226211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f8379bd82 [ 33.227082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f82bd5000 [ 33.227964] RBP: 00007f7f82bd5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.228836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bd01faec0 [ 33.229704] R13: 00007ffeb558d0d0 R14: 00007ffeb558d100 R15: 00007ffeb558d460 [ 33.230586] [ 33.230882] [ 33.231103] Allocated by task 213: [ 33.231569] kasan_save_stack+0x22/0x50 [ 33.232083] kasan_set_track+0x25/0x30 [ 33.232607] __kasan_slab_alloc+0x59/0x70 [ 33.233137] kmem_cache_alloc+0x16b/0x370 [ 33.233671] vm_area_dup+0x20/0x160 [ 33.234148] __split_vma+0x170/0x950 [ 33.234634] split_vma+0xc6/0x110 [ 33.235079] mprotect_fixup+0x8d2/0xb30 [ 33.235614] do_mprotect_pkey+0x87e/0xd40 [ 33.236138] __x64_sys_mprotect+0x78/0xc0 [ 33.236682] do_syscall_64+0x3f/0x90 [ 33.237164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.237818] [ 33.238039] Freed by task 213: [ 33.238441] kasan_save_stack+0x22/0x50 [ 33.238948] kasan_set_track+0x25/0x30 [ 33.239467] kasan_save_free_info+0x2b/0x50 [ 33.240025] __kasan_slab_free+0x10a/0x190 [ 33.240575] kmem_cache_free+0x10d/0x4d0 [ 33.241084] rcu_core+0x8c8/0x2860 [ 33.241550] __do_softirq+0x1b7/0x7d4 [ 33.242028] [ 33.242245] Last potentially related work creation: [ 33.242853] kasan_save_stack+0x22/0x50 [ 33.243366] __kasan_record_aux_stack+0x8e/0xa0 [ 33.243960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.244704] remove_vma+0x139/0x170 [ 33.245220] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.245800] do_vmi_munmap+0x1f1/0x2b0 [ 33.246287] __vm_munmap+0x138/0x3a0 [ 33.246763] __x64_sys_munmap+0x59/0x80 [ 33.247260] do_syscall_64+0x3f/0x90 [ 33.247775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.248432] [ 33.248648] The buggy address belongs to the object at ffff888019dff828 [ 33.248648] which belongs to the cache vm_area_struct of size 168 [ 33.250143] The buggy address is located 88 bytes inside of [ 33.250143] freed 168-byte region [ffff888019dff828, ffff888019dff8d0) [ 33.251583] [ 33.251809] The buggy address belongs to the physical page: [ 33.252490] page:00000000e76ec102 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dff [ 33.253599] memcg:ffff888015e39e01 [ 33.254030] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.254693] page_type: 0xffffffff() [ 33.255148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.256097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e39e01 [ 33.257018] page dumped because: kasan: bad access detected [ 33.257699] [ 33.257925] Memory state around the buggy address: [ 33.258535] ffff888019dff780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.259414] ffff888019dff800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.260296] >ffff888019dff880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.261156] ^ [ 33.261581] ffff888019dff900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.262459] ffff888019dff980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.263325] ================================================================== [ 33.264292] Disabling lock debugging due to kernel taint [ 35.174730] BUG: Bad rss-counter state mm:00000000f998986b type:MM_FILEPAGES val:33 [ 35.175601] BUG: Bad rss-counter state mm:00000000f998986b type:MM_ANONPAGES val:22 [ 35.673427] BUG: Bad rss-counter state mm:00000000e124af50 type:MM_FILEPAGES val:33 [ 35.674643] BUG: Bad rss-counter state mm:00000000e124af50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30654' (ECDSA) to the list of known hosts. 2023/06/19 10:58:54 fuzzer started 2023/06/19 10:58:54 dialing manager at localhost:44161 2023/06/19 10:58:54 checking machine... 2023/06/19 10:58:54 checking revisions... [ 36.394612] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:58:55 testing simple program... [ 36.448858] cgroup: Unknown subsys name 'net' [ 36.503135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:51 Registers: info registers vcpu 0 RAX=ffff888018050001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801804f501 RSI=ffff88801804f588 RDI=ffff88806ce09aa8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801804f590 R15=ffff88806ce09a98 RIP=ffffffff81131039 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 00007f7054ab6700 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=00007fc1cb5532a0 CR3=000000000d6e0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36333034352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363330 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=ffffffff84506c7f RBX=0000000000000001 RCX=ffffffff86128101 RDX=ffff888019ce7098 RSI=ffffffff84506c7f RDI=ffff888019ce7050 RBP=ffff888019ce70a8 RSP=ffff888019ce6fe0 R8 =ffffffff86128140 R9 =ffff888019ce7090 R10=0000000000038001 R11=000000000001e4e6 R12=ffff888019ce7118 R13=ffff888019ce7098 R14=ffff88800f1551c0 R15=ffff888019ce7050 RIP=ffffffff81130641 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 00007f106f543900 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=00007f106f508008 CR3=000000000e4ae000 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