syzkaller login: [ 30.060403] BUG: Bad rss-counter state mm:00000000c0b74afd type:MM_FILEPAGES val:33 [ 30.061760] BUG: Bad rss-counter state mm:00000000c0b74afd type:MM_ANONPAGES val:22 [ 30.218593] ================================================================== [ 30.219697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.220846] Read of size 8 at addr ffff88800e1e7798 by task sshd/220 [ 30.221965] [ 30.222242] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.223305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.224504] Call Trace: [ 30.224920] [ 30.225253] dump_stack_lvl+0x91/0xf0 [ 30.225843] print_report+0xcc/0x620 [ 30.226432] ? __virt_addr_valid+0x102/0x340 [ 30.227102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.227853] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.228608] kasan_report+0xbe/0xf0 [ 30.229198] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.229967] vma_interval_tree_remove+0xc75/0xec0 [ 30.230702] vma_prepare+0xc54/0x11a0 [ 30.231292] __split_vma+0x5af/0x950 [ 30.231869] ? __pfx___split_vma+0x10/0x10 [ 30.232535] ? find_held_lock+0x2c/0x110 [ 30.233174] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.233867] ? lock_is_held_type+0x9f/0x120 [ 30.234531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.235281] ? mtree_range_walk+0x632/0x900 [ 30.235969] ? mas_walk+0x5c7/0x7c0 [ 30.236573] do_vmi_munmap+0x1f1/0x2b0 [ 30.237183] mmap_region+0x1f9/0x2660 [ 30.237777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.238401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.239275] ? __pfx_lock_acquire+0x10/0x10 [ 30.239924] ? __pfx_mmap_region+0x10/0x10 [ 30.240579] ? security_mmap_addr+0x7d/0xa0 [ 30.241226] ? get_unmapped_area+0x1f5/0x3f0 [ 30.241901] do_mmap+0x854/0xf00 [ 30.242441] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.243052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.243742] ksys_mmap_pgoff+0x3af/0x500 [ 30.244348] do_syscall_64+0x3f/0x90 [ 30.244934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.245713] RIP: 0033:0x7f2a38eb9d82 [ 30.246269] 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 [ 30.248911] RSP: 002b:00007ffe52bf8448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.250024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a38eb9d82 [ 30.251059] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a382f3000 [ 30.252107] RBP: 00007f2a382f3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.253169] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d35edc9b20 [ 30.254225] R13: 00007ffe52bf8460 R14: 00007ffe52bf8490 R15: 00007ffe52bf87f0 [ 30.255281] [ 30.255643] [ 30.255907] Allocated by task 213: [ 30.256439] kasan_save_stack+0x22/0x50 [ 30.257074] kasan_set_track+0x25/0x30 [ 30.257670] __kasan_slab_alloc+0x59/0x70 [ 30.258300] kmem_cache_alloc+0x16b/0x370 [ 30.258923] vm_area_dup+0x20/0x160 [ 30.259479] __split_vma+0x170/0x950 [ 30.260044] split_vma+0xc6/0x110 [ 30.260588] mprotect_fixup+0x8d2/0xb30 [ 30.261202] do_mprotect_pkey+0x87e/0xd40 [ 30.261829] __x64_sys_mprotect+0x78/0xc0 [ 30.262463] do_syscall_64+0x3f/0x90 [ 30.263122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.263921] [ 30.264186] Freed by task 203: [ 30.264689] kasan_save_stack+0x22/0x50 [ 30.265307] kasan_set_track+0x25/0x30 [ 30.265913] kasan_save_free_info+0x2b/0x50 [ 30.266570] __kasan_slab_free+0x10a/0x190 [ 30.267209] kmem_cache_free+0x10d/0x4d0 [ 30.267817] rcu_core+0x8c8/0x2860 [ 30.268367] __do_softirq+0x1b7/0x7d4 [ 30.268962] [ 30.269228] Last potentially related work creation: [ 30.269952] kasan_save_stack+0x22/0x50 [ 30.270561] __kasan_record_aux_stack+0x8e/0xa0 [ 30.271256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.272042] remove_vma+0x139/0x170 [ 30.272607] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.273189] do_vmi_munmap+0x1f1/0x2b0 [ 30.273715] __vm_munmap+0x138/0x3a0 [ 30.274201] __x64_sys_munmap+0x59/0x80 [ 30.274708] do_syscall_64+0x3f/0x90 [ 30.275180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.275813] [ 30.276024] The buggy address belongs to the object at ffff88800e1e7740 [ 30.276024] which belongs to the cache vm_area_struct of size 168 [ 30.277522] The buggy address is located 88 bytes inside of [ 30.277522] freed 168-byte region [ffff88800e1e7740, ffff88800e1e77e8) [ 30.278925] [ 30.279135] The buggy address belongs to the physical page: [ 30.279794] page:00000000080d96a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1e7 [ 30.280884] memcg:ffff8880095c0601 [ 30.281312] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.282016] page_type: 0xffffffff() [ 30.282472] raw: 0100000000000200 ffff8880087a0c80 ffffea000025a680 dead000000000003 [ 30.283390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c0601 [ 30.284304] page dumped because: kasan: bad access detected [ 30.284982] [ 30.285197] Memory state around the buggy address: [ 30.285776] ffff88800e1e7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.286639] ffff88800e1e7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.287483] >ffff88800e1e7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.288331] ^ [ 30.288831] ffff88800e1e7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.289679] ffff88800e1e7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.290526] ================================================================== [ 30.291503] Disabling lock debugging due to kernel taint [ 32.282044] BUG: Bad rss-counter state mm:000000005983f1fa type:MM_FILEPAGES val:33 [ 32.283098] BUG: Bad rss-counter state mm:000000005983f1fa type:MM_ANONPAGES val:22 [ 32.846579] BUG: Bad rss-counter state mm:00000000df819e53 type:MM_FILEPAGES val:33 [ 32.847568] BUG: Bad rss-counter state mm:00000000df819e53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36798' (ECDSA) to the list of known hosts. 2023/06/20 15:59:41 fuzzer started 2023/06/20 15:59:41 dialing manager at localhost:36067 2023/06/20 15:59:41 checking machine... 2023/06/20 15:59:41 checking revisions... [ 33.578071] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:59:41 testing simple program... [ 33.621188] cgroup: Unknown subsys name 'net' [ 33.675419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110010f8662 RSI=ffffffff81f16c03 RDI=ffff8880087c3312 RBP=ffff888008c28768 RSP=ffff88800cb8f828 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff8880087c32f0 R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff81f16c1d RFL=00000212 [----A--] 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 00007fd8a567d900 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=00007fd8a5c32650 CR3=000000001a3d6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffd6ce5a6c8 CR3=000000000fdfa000 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=2030343a39353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000