syzkaller login: [ 30.233748] BUG: Bad rss-counter state mm:000000002f50d865 type:MM_FILEPAGES val:33 [ 30.234824] BUG: Bad rss-counter state mm:000000002f50d865 type:MM_ANONPAGES val:22 [ 30.398914] ================================================================== [ 30.400255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.401466] Read of size 8 at addr ffff8880182364e0 by task sshd/219 [ 30.402443] [ 30.402716] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.403819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.405068] Call Trace: [ 30.405480] [ 30.405844] dump_stack_lvl+0x91/0xf0 [ 30.406478] print_report+0xcc/0x620 [ 30.407139] ? __virt_addr_valid+0x102/0x340 [ 30.407864] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.408639] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.409507] kasan_report+0xbe/0xf0 [ 30.410183] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.411075] vma_interval_tree_remove+0xc75/0xec0 [ 30.411867] vma_prepare+0xc54/0x11a0 [ 30.412545] __split_vma+0x5af/0x950 [ 30.413206] ? __pfx___split_vma+0x10/0x10 [ 30.413951] ? find_held_lock+0x2c/0x110 [ 30.414678] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.415517] ? lock_is_held_type+0x9f/0x120 [ 30.416273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.417082] ? mtree_range_walk+0x632/0x900 [ 30.417845] ? mas_walk+0x5c7/0x7c0 [ 30.418504] do_vmi_munmap+0x1f1/0x2b0 [ 30.419191] mmap_region+0x1f9/0x2660 [ 30.419845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.420533] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.421479] ? __pfx_lock_acquire+0x10/0x10 [ 30.422213] ? __pfx_mmap_region+0x10/0x10 [ 30.422939] ? security_mmap_addr+0x7d/0xa0 [ 30.423687] ? get_unmapped_area+0x1f5/0x3f0 [ 30.424314] do_mmap+0x854/0xf00 [ 30.424822] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.425381] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.425999] ksys_mmap_pgoff+0x3af/0x500 [ 30.426537] do_syscall_64+0x3f/0x90 [ 30.427110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.427802] RIP: 0033:0x7f47c66dbd82 [ 30.428292] 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 [ 30.430547] RSP: 002b:00007ffe1550a928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.431510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47c66dbd82 [ 30.432409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47c5b15000 [ 30.433309] RBP: 00007f47c5b15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.434210] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561937506d90 [ 30.435152] R13: 00007ffe1550a940 R14: 00007ffe1550a970 R15: 00007ffe1550acd0 [ 30.436074] [ 30.436379] [ 30.436601] Allocated by task 212: [ 30.437061] kasan_save_stack+0x22/0x50 [ 30.437586] kasan_set_track+0x25/0x30 [ 30.438112] __kasan_slab_alloc+0x59/0x70 [ 30.438663] kmem_cache_alloc+0x16b/0x370 [ 30.439219] vm_area_dup+0x20/0x160 [ 30.439700] __split_vma+0x170/0x950 [ 30.440351] split_vma+0xc6/0x110 [ 30.440830] mprotect_fixup+0x8d2/0xb30 [ 30.441368] do_mprotect_pkey+0x87e/0xd40 [ 30.441915] __x64_sys_mprotect+0x78/0xc0 [ 30.442462] do_syscall_64+0x3f/0x90 [ 30.442962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.443674] [ 30.443907] Freed by task 19: [ 30.444306] kasan_save_stack+0x22/0x50 [ 30.444832] kasan_set_track+0x25/0x30 [ 30.445378] kasan_save_free_info+0x2b/0x50 [ 30.445944] __kasan_slab_free+0x10a/0x190 [ 30.446497] kmem_cache_free+0x10d/0x4d0 [ 30.447042] rcu_core+0x8c8/0x2860 [ 30.447509] __do_softirq+0x1b7/0x7d4 [ 30.448019] [ 30.448244] Last potentially related work creation: [ 30.448863] kasan_save_stack+0x22/0x50 [ 30.449400] __kasan_record_aux_stack+0x8e/0xa0 [ 30.450032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.450699] remove_vma+0x139/0x170 [ 30.451201] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.451779] do_vmi_munmap+0x1f1/0x2b0 [ 30.452302] __vm_munmap+0x138/0x3a0 [ 30.452792] __x64_sys_munmap+0x59/0x80 [ 30.453335] do_syscall_64+0x3f/0x90 [ 30.453847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.454543] [ 30.454762] The buggy address belongs to the object at ffff888018236488 [ 30.454762] which belongs to the cache vm_area_struct of size 168 [ 30.456366] The buggy address is located 88 bytes inside of [ 30.456366] freed 168-byte region [ffff888018236488, ffff888018236530) [ 30.457866] [ 30.458094] The buggy address belongs to the physical page: [ 30.458783] page:0000000082bbb137 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18236 [ 30.459963] memcg:ffff888016622d01 [ 30.460424] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.461127] page_type: 0xffffffff() [ 30.461611] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.462584] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016622d01 [ 30.463550] page dumped because: kasan: bad access detected [ 30.464260] [ 30.464480] Memory state around the buggy address: [ 30.465114] ffff888018236380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.466034] ffff888018236400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.466946] >ffff888018236480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.467876] ^ [ 30.468692] ffff888018236500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.469619] ffff888018236580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.470562] ================================================================== [ 30.471579] Disabling lock debugging due to kernel taint [ 33.241984] BUG: Bad rss-counter state mm:0000000030cc08d6 type:MM_FILEPAGES val:33 [ 33.243055] BUG: Bad rss-counter state mm:0000000030cc08d6 type:MM_ANONPAGES val:22 [ 33.808275] BUG: Bad rss-counter state mm:00000000fdf900aa type:MM_FILEPAGES val:33 [ 33.809449] BUG: Bad rss-counter state mm:00000000fdf900aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59456' (ECDSA) to the list of known hosts. 2023/06/21 03:27:35 fuzzer started 2023/06/21 03:27:35 dialing manager at localhost:36067 2023/06/21 03:27:35 checking machine... 2023/06/21 03:27:35 checking revisions... [ 34.460734] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:27:35 testing simple program... [ 34.519569] cgroup: Unknown subsys name 'net' [ 34.563711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:35 Registers: info registers vcpu 0 RAX=ffff88806ce3e0d0 RBX=ffff888019f86200 RCX=ffff888008dc9400 RDX=ffff888008dc9400 RSI=ffffea0000237200 RDI=ffff8880084c6140 RBP=ffff888016577a28 RSP=ffff888016577a00 R8 =0000000000000001 R9 =ffffffff8181032f R10=ffffea0000237200 R11=0000000000100001 R12=ffffea0000237200 R13=ffff888016577a78 R14=ffff8880084c6140 R15=ffff888008dc9400 RIP=ffffffff818095f3 RFL=00000206 [-----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 00007fed5d572900 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=00007fff342eb000 CR3=0000000019cc4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84537da7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09f50 RDI=ffffffff84537da7 RBP=ffff88806cf09b30 RSP=ffff88806cf09a98 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff8880096a1b30 RIP=ffffffff810bd06d 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 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=00007f28e4d7b800 CR3=0000000018196000 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=2034333a37323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a37323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000