syzkaller login: [ 37.129763] BUG: Bad rss-counter state mm:00000000624684bb type:MM_FILEPAGES val:33 [ 37.131052] BUG: Bad rss-counter state mm:00000000624684bb type:MM_ANONPAGES val:22 [ 37.168940] ================================================================== [ 37.169916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.170987] Read of size 8 at addr ffff88800ff8d6b0 by task sshd/220 [ 37.171774] [ 37.172001] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.172893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.173920] Call Trace: [ 37.174265] [ 37.174558] dump_stack_lvl+0x91/0xf0 [ 37.175067] print_report+0xcc/0x620 [ 37.175568] ? __virt_addr_valid+0x102/0x340 [ 37.176142] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.176789] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.177423] kasan_report+0xbe/0xf0 [ 37.177906] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.178585] vma_interval_tree_remove+0xc75/0xec0 [ 37.179213] vma_prepare+0xc54/0x11a0 [ 37.179711] __split_vma+0x5af/0x950 [ 37.180202] ? __pfx___split_vma+0x10/0x10 [ 37.180753] ? find_held_lock+0x2c/0x110 [ 37.181295] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.181881] ? lock_is_held_type+0x9f/0x120 [ 37.182445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.183069] ? mtree_range_walk+0x632/0x900 [ 37.183637] ? mas_walk+0x5c7/0x7c0 [ 37.184124] do_vmi_munmap+0x1f1/0x2b0 [ 37.184633] mmap_region+0x1f9/0x2660 [ 37.185132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.185660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.186414] ? __pfx_lock_acquire+0x10/0x10 [ 37.186976] ? __pfx_mmap_region+0x10/0x10 [ 37.187533] ? security_mmap_addr+0x7d/0xa0 [ 37.188091] ? get_unmapped_area+0x1f5/0x3f0 [ 37.188665] do_mmap+0x854/0xf00 [ 37.189115] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.189627] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.190213] ksys_mmap_pgoff+0x3af/0x500 [ 37.190743] do_syscall_64+0x3f/0x90 [ 37.191230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.191901] RIP: 0033:0x7f66a0211d82 [ 37.192379] 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 [ 37.194612] RSP: 002b:00007ffc8bd84a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.195523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66a0211d82 [ 37.196385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f669f64b000 [ 37.197239] RBP: 00007f669f64b000 R08: 0000000000000009 R09: 0000000000001000 [ 37.198105] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b91243ec0 [ 37.198984] R13: 00007ffc8bd84a90 R14: 00007ffc8bd84ac0 R15: 00007ffc8bd84e20 [ 37.199866] [ 37.200161] [ 37.200381] Allocated by task 213: [ 37.200822] kasan_save_stack+0x22/0x50 [ 37.201326] kasan_set_track+0x25/0x30 [ 37.201824] __kasan_slab_alloc+0x59/0x70 [ 37.202360] kmem_cache_alloc+0x16b/0x370 [ 37.202885] vm_area_dup+0x20/0x160 [ 37.203349] __split_vma+0x170/0x950 [ 37.203928] split_vma+0xc6/0x110 [ 37.204374] mprotect_fixup+0x8d2/0xb30 [ 37.204980] do_mprotect_pkey+0x87e/0xd40 [ 37.205498] __x64_sys_mprotect+0x78/0xc0 [ 37.206021] do_syscall_64+0x3f/0x90 [ 37.206519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.207157] [ 37.207375] Freed by task 213: [ 37.207763] kasan_save_stack+0x22/0x50 [ 37.208273] kasan_set_track+0x25/0x30 [ 37.208770] kasan_save_free_info+0x2b/0x50 [ 37.209300] __kasan_slab_free+0x10a/0x190 [ 37.209836] kmem_cache_free+0x10d/0x4d0 [ 37.210351] rcu_core+0x8c8/0x2860 [ 37.210796] __do_softirq+0x1b7/0x7d4 [ 37.211269] [ 37.211485] Last potentially related work creation: [ 37.212073] kasan_save_stack+0x22/0x50 [ 37.212576] __kasan_record_aux_stack+0x8e/0xa0 [ 37.213146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.213785] remove_vma+0x139/0x170 [ 37.214239] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.214795] do_vmi_munmap+0x1f1/0x2b0 [ 37.215278] __vm_munmap+0x138/0x3a0 [ 37.215744] __x64_sys_munmap+0x59/0x80 [ 37.216238] do_syscall_64+0x3f/0x90 [ 37.216715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.217355] [ 37.217581] Second to last potentially related work creation: [ 37.218287] kasan_save_stack+0x22/0x50 [ 37.218794] __kasan_record_aux_stack+0x8e/0xa0 [ 37.219363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.219999] remove_vma+0x139/0x170 [ 37.220451] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.221009] do_vmi_munmap+0x1f1/0x2b0 [ 37.221492] mmap_region+0x1f9/0x2660 [ 37.221968] do_mmap+0x854/0xf00 [ 37.222410] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.222895] ksys_mmap_pgoff+0x3af/0x500 [ 37.223393] do_syscall_64+0x3f/0x90 [ 37.223866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.224507] [ 37.224724] The buggy address belongs to the object at ffff88800ff8d658 [ 37.224724] which belongs to the cache vm_area_struct of size 168 [ 37.226203] The buggy address is located 88 bytes inside of [ 37.226203] freed 168-byte region [ffff88800ff8d658, ffff88800ff8d700) [ 37.227606] [ 37.227820] The buggy address belongs to the physical page: [ 37.228481] page:00000000fd829fe9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff8d [ 37.229572] memcg:ffff88800ff33501 [ 37.230004] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.230705] page_type: 0xffffffff() [ 37.231154] raw: 0100000000000200 ffff88800879fc80 ffffea00003c5580 dead000000000003 [ 37.232074] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff33501 [ 37.232977] page dumped because: kasan: bad access detected [ 37.233643] [ 37.233859] Memory state around the buggy address: [ 37.234470] ffff88800ff8d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.235323] ffff88800ff8d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.236176] >ffff88800ff8d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.237021] ^ [ 37.237610] ffff88800ff8d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.238494] ffff88800ff8d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.239345] ================================================================== [ 37.240382] Disabling lock debugging due to kernel taint [ 39.493756] BUG: Bad rss-counter state mm:000000004659d9e0 type:MM_FILEPAGES val:33 [ 39.494941] BUG: Bad rss-counter state mm:000000004659d9e0 type:MM_ANONPAGES val:22 [ 39.872466] BUG: Bad rss-counter state mm:00000000884bb1bf type:MM_FILEPAGES val:33 [ 39.873667] BUG: Bad rss-counter state mm:00000000884bb1bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43105' (ECDSA) to the list of known hosts. 2023/06/19 23:39:51 fuzzer started 2023/06/19 23:39:52 dialing manager at localhost:44161 2023/06/19 23:39:52 checking machine... 2023/06/19 23:39:52 checking revisions... [ 40.530612] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:39:52 testing simple program... [ 40.575120] cgroup: Unknown subsys name 'net' [ 40.614148] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:39:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008ff0608 RCX=0000000000000000 RDX=ffff888015e61b40 RSI=ffff888008ff0648 RDI=ffff888016f4fcc0 RBP=ffff888016f4fcc0 RSP=ffff88800d87fc48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008ff0600 R13=0000000000000000 R14=ffff88800cc88028 R15=00005622158a0000 RIP=ffffffff844c50e4 RFL=00000293 [--S-A-C] 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 00007fe58da9c700 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=00007f8e1c5a50b0 CR3=000000000e1f4000 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=39333a3332203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383632 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0305f8c8c0 CR3=000000000cd78000 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=bc7d192b32dc87b832418accb2ee22d4 XMM02=2c67c8bc2e329bc3000000000011e3d0 XMM03=fb795ef6d657705600000000001245f8 XMM04=e68e7809cd281b3a00000000000ae988 XMM05=19e9129bd510f2350000000000135218 XMM06=43f35dd395fe7d3100000000001343f0 XMM07=e042d86d42eb936e00000000001248d0 XMM08=f02e923a2f80a86a000000000011e430 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000