syzkaller login: [ 31.025679] BUG: Bad rss-counter state mm:00000000cbfb0d41 type:MM_FILEPAGES val:33 [ 31.026877] BUG: Bad rss-counter state mm:00000000cbfb0d41 type:MM_ANONPAGES val:22 [ 31.206566] ================================================================== [ 31.207602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.208646] Read of size 8 at addr ffff8880167966b0 by task sshd/221 [ 31.209613] [ 31.209854] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.210807] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.211880] Call Trace: [ 31.212233] [ 31.212546] dump_stack_lvl+0x91/0xf0 [ 31.213088] print_report+0xcc/0x620 [ 31.213647] ? __virt_addr_valid+0x102/0x340 [ 31.214254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215612] kasan_report+0xbe/0xf0 [ 31.216156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216870] vma_interval_tree_remove+0xc75/0xec0 [ 31.217569] vma_prepare+0xc54/0x11a0 [ 31.218117] __split_vma+0x5af/0x950 [ 31.218658] ? __pfx___split_vma+0x10/0x10 [ 31.219267] ? find_held_lock+0x2c/0x110 [ 31.219863] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.220501] ? lock_is_held_type+0x9f/0x120 [ 31.221124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.221826] ? mtree_range_walk+0x632/0x900 [ 31.222450] ? mas_walk+0x5c7/0x7c0 [ 31.222993] do_vmi_munmap+0x1f1/0x2b0 [ 31.223549] mmap_region+0x1f9/0x2660 [ 31.224098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.224682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.225513] ? __pfx_lock_acquire+0x10/0x10 [ 31.226118] ? __pfx_mmap_region+0x10/0x10 [ 31.226722] ? security_mmap_addr+0x7d/0xa0 [ 31.227320] ? get_unmapped_area+0x1f5/0x3f0 [ 31.227939] do_mmap+0x854/0xf00 [ 31.228436] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.229640] ksys_mmap_pgoff+0x3af/0x500 [ 31.230221] do_syscall_64+0x3f/0x90 [ 31.230767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231501] RIP: 0033:0x7fb595bb8d82 [ 31.232019] 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 [ 31.234438] RSP: 002b:00007ffcc56c2488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.235463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb595bb8d82 [ 31.236423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb594ff2000 [ 31.237398] RBP: 00007fb594ff2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.238356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc3c8ecec0 [ 31.239318] R13: 00007ffcc56c24a0 R14: 00007ffcc56c24d0 R15: 00007ffcc56c2830 [ 31.240286] [ 31.240614] [ 31.240853] Allocated by task 214: [ 31.241334] kasan_save_stack+0x22/0x50 [ 31.241905] kasan_set_track+0x25/0x30 [ 31.242457] __kasan_slab_alloc+0x59/0x70 [ 31.243042] kmem_cache_alloc+0x16b/0x370 [ 31.243623] vm_area_dup+0x20/0x160 [ 31.244131] __split_vma+0x170/0x950 [ 31.244648] split_vma+0xc6/0x110 [ 31.245139] mprotect_fixup+0x8d2/0xb30 [ 31.245728] do_mprotect_pkey+0x87e/0xd40 [ 31.246320] __x64_sys_mprotect+0x78/0xc0 [ 31.246900] do_syscall_64+0x3f/0x90 [ 31.247434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248151] [ 31.248390] Freed by task 214: [ 31.248833] kasan_save_stack+0x22/0x50 [ 31.249408] kasan_set_track+0x25/0x30 [ 31.249957] kasan_save_free_info+0x2b/0x50 [ 31.250549] __kasan_slab_free+0x10a/0x190 [ 31.251149] kmem_cache_free+0x10d/0x4d0 [ 31.251724] rcu_core+0x8c8/0x2860 [ 31.252223] __do_softirq+0x1b7/0x7d4 [ 31.252762] [ 31.253001] Last potentially related work creation: [ 31.253675] kasan_save_stack+0x22/0x50 [ 31.254240] __kasan_record_aux_stack+0x8e/0xa0 [ 31.254883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.255598] remove_vma+0x139/0x170 [ 31.256106] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.256729] do_vmi_munmap+0x1f1/0x2b0 [ 31.257283] __vm_munmap+0x138/0x3a0 [ 31.257818] __x64_sys_munmap+0x59/0x80 [ 31.258370] do_syscall_64+0x3f/0x90 [ 31.258912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259651] [ 31.259900] The buggy address belongs to the object at ffff888016796658 [ 31.259900] which belongs to the cache vm_area_struct of size 168 [ 31.261614] The buggy address is located 88 bytes inside of [ 31.261614] freed 168-byte region [ffff888016796658, ffff888016796700) [ 31.263257] [ 31.263503] The buggy address belongs to the physical page: [ 31.264263] page:00000000eb268908 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16796 [ 31.265546] memcg:ffff88801917ba01 [ 31.266038] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.266782] page_type: 0xffffffff() [ 31.267300] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.268367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801917ba01 [ 31.269420] page dumped because: kasan: bad access detected [ 31.270190] [ 31.270435] Memory state around the buggy address: [ 31.271107] ffff888016796580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.272102] ffff888016796600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.273090] >ffff888016796680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.274099] ^ [ 31.274775] ffff888016796700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.275768] ffff888016796780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.276748] ================================================================== [ 31.277921] Disabling lock debugging due to kernel taint [ 33.222844] BUG: Bad rss-counter state mm:00000000f18ede70 type:MM_FILEPAGES val:33 [ 33.224236] BUG: Bad rss-counter state mm:00000000f18ede70 type:MM_ANONPAGES val:22 [ 33.687847] BUG: Bad rss-counter state mm:00000000c97d7204 type:MM_FILEPAGES val:33 [ 33.688824] BUG: Bad rss-counter state mm:00000000c97d7204 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38004' (ECDSA) to the list of known hosts. 2023/06/21 03:42:19 fuzzer started 2023/06/21 03:42:19 dialing manager at localhost:36067 2023/06/21 03:42:19 checking machine... 2023/06/21 03:42:19 checking revisions... [ 34.421031] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:42:19 testing simple program... [ 34.462374] cgroup: Unknown subsys name 'net' [ 34.525467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:42:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f0497478340 CR3=000000000c97c000 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=5c875352ec6268a4b346e3609bb9b836 XMM02=0000000000119fa8eff9b2d0a8fce9cb XMM03=000000000011a0782c67c8bc2e329bc3 XMM04=ea339b9207bb8a1600000000000ae988 XMM05=e4cb8bb95a7664b60000000000131320 XMM06=b35868f93db02d4c0000000000130188 XMM07=e042d86d42eb936e0000000000121738 XMM08=8a4b0d9de15779d1000000000011a078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81745be8 RDX=0000000000000007 RSI=ffffffff86129a96 RDI=ffffffff85df3d78 RBP=ffffffff85df3d78 RSP=ffff8880102870a0 R8 =ffffffff86129a96 R9 =ffff888010287198 R10=0000000000038001 R11=000000000001e4ed R12=ffffffff85df3d94 R13=ffffffff85df3d78 R14=ffffffff85df3d78 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000217 [----APC] 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 00007f7b6b639900 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=00007f7b6b618020 CR3=000000000e3e2000 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