syzkaller login: [ 29.976122] BUG: Bad rss-counter state mm:000000005f019f4c type:MM_FILEPAGES val:33 [ 29.977681] BUG: Bad rss-counter state mm:000000005f019f4c type:MM_ANONPAGES val:22 [ 30.142993] ================================================================== [ 30.144083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.145194] Read of size 8 at addr ffff88800f2414e0 by task sshd/221 [ 30.146080] [ 30.146292] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.147130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.148099] Call Trace: [ 30.148412] <TASK> [ 30.148687] dump_stack_lvl+0x91/0xf0 [ 30.149171] print_report+0xcc/0x620 [ 30.149649] ? __virt_addr_valid+0x102/0x340 [ 30.150187] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.150791] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.151415] kasan_report+0xbe/0xf0 [ 30.151885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.152498] vma_interval_tree_remove+0xc75/0xec0 [ 30.153091] vma_prepare+0xc54/0x11a0 [ 30.153559] __split_vma+0x5af/0x950 [ 30.154023] ? __pfx___split_vma+0x10/0x10 [ 30.154547] ? find_held_lock+0x2c/0x110 [ 30.155072] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.155627] ? lock_is_held_type+0x9f/0x120 [ 30.156157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.156747] ? mtree_range_walk+0x632/0x900 [ 30.157294] ? mas_walk+0x5c7/0x7c0 [ 30.157759] do_vmi_munmap+0x1f1/0x2b0 [ 30.158249] mmap_region+0x1f9/0x2660 [ 30.158724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.159249] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.159953] ? __pfx_lock_acquire+0x10/0x10 [ 30.160477] ? __pfx_mmap_region+0x10/0x10 [ 30.160998] ? security_mmap_addr+0x7d/0xa0 [ 30.161531] ? get_unmapped_area+0x1f5/0x3f0 [ 30.162069] do_mmap+0x854/0xf00 [ 30.162508] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.162996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.163599] ksys_mmap_pgoff+0x3af/0x500 [ 30.164103] do_syscall_64+0x3f/0x90 [ 30.164575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.165223] RIP: 0033:0x7fb563ebcd82 [ 30.165672] 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 [ 30.167773] RSP: 002b:00007ffc118679e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.168664] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb563ebcd82 [ 30.169504] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5632f6000 [ 30.170340] RBP: 00007fb5632f6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.171179] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b219ddcec0 [ 30.172012] R13: 00007ffc11867a00 R14: 00007ffc11867a30 R15: 00007ffc11867d90 [ 30.172861] </TASK> [ 30.173149] [ 30.173361] Allocated by task 214: [ 30.173791] kasan_save_stack+0x22/0x50 [ 30.174289] kasan_set_track+0x25/0x30 [ 30.174778] __kasan_slab_alloc+0x59/0x70 [ 30.175317] kmem_cache_alloc+0x16b/0x370 [ 30.175825] vm_area_dup+0x20/0x160 [ 30.176272] __split_vma+0x170/0x950 [ 30.176735] split_vma+0xc6/0x110 [ 30.177169] mprotect_fixup+0x8d2/0xb30 [ 30.177664] do_mprotect_pkey+0x87e/0xd40 [ 30.178176] __x64_sys_mprotect+0x78/0xc0 [ 30.178687] do_syscall_64+0x3f/0x90 [ 30.179273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.179927] [ 30.180141] Freed by task 203: [ 30.180537] kasan_save_stack+0x22/0x50 [ 30.181035] kasan_set_track+0x25/0x30 [ 30.181531] kasan_save_free_info+0x2b/0x50 [ 30.182067] __kasan_slab_free+0x10a/0x190 [ 30.182612] kmem_cache_free+0x10d/0x4d0 [ 30.183143] rcu_core+0x8c8/0x2860 [ 30.183587] __do_softirq+0x1b7/0x7d4 [ 30.184068] [ 30.184288] Last potentially related work creation: [ 30.184873] kasan_save_stack+0x22/0x50 [ 30.185375] __kasan_record_aux_stack+0x8e/0xa0 [ 30.185954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.186601] remove_vma+0x139/0x170 [ 30.187063] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.187623] do_vmi_munmap+0x1f1/0x2b0 [ 30.188118] __vm_munmap+0x138/0x3a0 [ 30.188592] __x64_sys_munmap+0x59/0x80 [ 30.189090] do_syscall_64+0x3f/0x90 [ 30.189574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.190219] [ 30.190436] The buggy address belongs to the object at ffff88800f241488 [ 30.190436] which belongs to the cache vm_area_struct of size 168 [ 30.191921] The buggy address is located 88 bytes inside of [ 30.191921] freed 168-byte region [ffff88800f241488, ffff88800f241530) [ 30.193330] [ 30.193546] The buggy address belongs to the physical page: [ 30.194209] page:00000000ce5a23c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf241 [ 30.195328] memcg:ffff88801418d501 [ 30.195764] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.196419] page_type: 0xffffffff() [ 30.196874] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.197803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801418d501 [ 30.198721] page dumped because: kasan: bad access detected [ 30.199392] [ 30.199609] Memory state around the buggy address: [ 30.200204] ffff88800f241380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.201179] ffff88800f241400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.202015] >ffff88800f241480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.202857] ^ [ 30.203621] ffff88800f241500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.204471] ffff88800f241580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.205320] ================================================================== [ 30.206267] Disabling lock debugging due to kernel taint [ 32.108105] BUG: Bad rss-counter state mm:00000000713964cd type:MM_FILEPAGES val:33 [ 32.109119] BUG: Bad rss-counter state mm:00000000713964cd type:MM_ANONPAGES val:22 [ 32.560076] BUG: Bad rss-counter state mm:00000000af69d8ac type:MM_FILEPAGES val:33 [ 32.561743] BUG: Bad rss-counter state mm:00000000af69d8ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44677' (ECDSA) to the list of known hosts. 2023/06/20 18:23:15 fuzzer started 2023/06/20 18:23:15 dialing manager at localhost:36067 2023/06/20 18:23:15 checking machine... 2023/06/20 18:23:15 checking revisions... [ 33.292386] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:23:15 testing simple program... [ 33.334655] cgroup: Unknown subsys name 'net' [ 33.374131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:15 Registers: info registers vcpu 0 RAX=ffffffff8180b2d5 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f1d7801 RSI=ffff88800f1d78d8 RDI=ffff88800f1d78d8 RBP=ffff88800f1d7578 RSP=ffff88800f1d74b0 R8 =ffffffff860d258a R9 =ffff88800f1d7560 R10=0000000000038001 R11=000000000000fc0c R12=ffff88800f1d7580 R13=ffff88800f1d7568 R14=ffff88800f1d78e0 R15=ffff88800f1d7520 RIP=ffffffff81131041 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 00007f445f0c4900 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=00007f445f67b618 CR3=00000000166a0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f80cebde6d0 CR3=000000000d428000 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=b7bb7c506c6c988ec5486f06279f0b52 XMM02=ec2efd57dc4c00df000000000011a8d0 XMM03=523797c7227f5849000000000011a9a0 XMM04=9ce06e7b073bd50900000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c58 XMM06=bc24b75fae9db19d0000000000130ac0 XMM07=e042d86d42eb936e0000000000122100 XMM08=523797c7227f5849000000000011a9a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000