syzkaller login: [ 38.895597] BUG: Bad rss-counter state mm:000000004d86b292 type:MM_FILEPAGES val:33 [ 38.896779] BUG: Bad rss-counter state mm:000000004d86b292 type:MM_ANONPAGES val:22 [ 38.936235] ================================================================== [ 38.937184] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.938179] Read of size 8 at addr ffff88800d6513f8 by task sshd/218 [ 38.938988] [ 38.939316] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.940225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.941255] Call Trace: [ 38.941590] [ 38.941887] dump_stack_lvl+0x91/0xf0 [ 38.942423] print_report+0xcc/0x620 [ 38.942924] ? __virt_addr_valid+0x102/0x340 [ 38.943524] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.944178] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.944833] kasan_report+0xbe/0xf0 [ 38.945354] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946014] vma_interval_tree_remove+0xc75/0xec0 [ 38.946675] vma_prepare+0xc54/0x11a0 [ 38.947215] __split_vma+0x5af/0x950 [ 38.947715] ? __pfx___split_vma+0x10/0x10 [ 38.948293] ? find_held_lock+0x2c/0x110 [ 38.948848] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.949458] ? lock_is_held_type+0x9f/0x120 [ 38.950043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.950721] ? mtree_range_walk+0x632/0x900 [ 38.951353] ? mas_walk+0x5c7/0x7c0 [ 38.951856] do_vmi_munmap+0x1f1/0x2b0 [ 38.952398] mmap_region+0x1f9/0x2660 [ 38.952910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.953469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.954263] ? __pfx_lock_acquire+0x10/0x10 [ 38.954827] ? __pfx_mmap_region+0x10/0x10 [ 38.955414] ? security_mmap_addr+0x7d/0xa0 [ 38.955976] ? get_unmapped_area+0x1f5/0x3f0 [ 38.956581] do_mmap+0x854/0xf00 [ 38.957067] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.957591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.958218] ksys_mmap_pgoff+0x3af/0x500 [ 38.958763] do_syscall_64+0x3f/0x90 [ 38.959298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959980] RIP: 0033:0x7f46d3c0dd82 [ 38.960486] 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 [ 38.962783] RSP: 002b:00007ffc8c5fe1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.963839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46d3c0dd82 [ 38.965042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46d3047000 [ 38.966248] RBP: 00007f46d3047000 R08: 0000000000000009 R09: 0000000000001000 [ 38.967470] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560337061f70 [ 38.968494] R13: 00007ffc8c5fe1e0 R14: 00007ffc8c5fe210 R15: 00007ffc8c5fe570 [ 38.969420] [ 38.969731] [ 38.969958] Allocated by task 211: [ 38.970443] kasan_save_stack+0x22/0x50 [ 38.971003] kasan_set_track+0x25/0x30 [ 38.971541] __kasan_slab_alloc+0x59/0x70 [ 38.972118] kmem_cache_alloc+0x16b/0x370 [ 38.972662] vm_area_dup+0x20/0x160 [ 38.973157] __split_vma+0x170/0x950 [ 38.973649] split_vma+0xc6/0x110 [ 38.974144] mprotect_fixup+0x8d2/0xb30 [ 38.974684] do_mprotect_pkey+0x87e/0xd40 [ 38.975258] __x64_sys_mprotect+0x78/0xc0 [ 38.975811] do_syscall_64+0x3f/0x90 [ 38.976332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977025] [ 38.977257] Freed by task 13: [ 38.977663] kasan_save_stack+0x22/0x50 [ 38.978229] kasan_set_track+0x25/0x30 [ 38.978759] kasan_save_free_info+0x2b/0x50 [ 38.979354] __kasan_slab_free+0x10a/0x190 [ 38.979917] kmem_cache_free+0x10d/0x4d0 [ 38.980481] rcu_core+0x8c8/0x2860 [ 38.980950] __do_softirq+0x1b7/0x7d4 [ 38.981471] [ 38.981699] Last potentially related work creation: [ 38.982352] kasan_save_stack+0x22/0x50 [ 38.982884] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.984227] remove_vma+0x139/0x170 [ 38.984705] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.985332] do_vmi_munmap+0x1f1/0x2b0 [ 38.985849] __vm_munmap+0x138/0x3a0 [ 38.986373] __x64_sys_munmap+0x59/0x80 [ 38.986899] do_syscall_64+0x3f/0x90 [ 38.987429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.988130] [ 38.988359] The buggy address belongs to the object at ffff88800d6513a0 [ 38.988359] which belongs to the cache vm_area_struct of size 168 [ 38.989922] The buggy address is located 88 bytes inside of [ 38.989922] freed 168-byte region [ffff88800d6513a0, ffff88800d651448) [ 38.991457] [ 38.991690] The buggy address belongs to the physical page: [ 38.992415] page:000000003987cc14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd651 [ 38.993584] memcg:ffff88800e098d01 [ 38.994060] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.994813] page_type: 0xffffffff() [ 38.995330] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.996318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e098d01 [ 38.997302] page dumped because: kasan: bad access detected [ 38.998006] [ 38.998257] Memory state around the buggy address: [ 38.998874] ffff88800d651280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.999804] ffff88800d651300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.000725] >ffff88800d651380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.001647] ^ [ 39.002555] ffff88800d651400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.003512] ffff88800d651480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.004434] ================================================================== [ 39.005743] Disabling lock debugging due to kernel taint [ 40.903204] BUG: Bad rss-counter state mm:000000006358cda1 type:MM_FILEPAGES val:33 [ 40.904108] BUG: Bad rss-counter state mm:000000006358cda1 type:MM_ANONPAGES val:22 [ 41.379217] BUG: Bad rss-counter state mm:00000000e0147fcd type:MM_FILEPAGES val:33 [ 41.380938] BUG: Bad rss-counter state mm:00000000e0147fcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44118' (ECDSA) to the list of known hosts. 2023/06/21 09:41:42 fuzzer started 2023/06/21 09:41:42 dialing manager at localhost:36067 2023/06/21 09:41:42 checking machine... 2023/06/21 09:41:42 checking revisions... [ 42.122380] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:41:42 testing simple program... [ 42.176849] cgroup: Unknown subsys name 'net' [ 42.221547] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff88801034d5b4 RBP=ffff88801034d1c0 RSP=ffff888019637940 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800f368000 RIP=ffffffff813744e1 RFL=00000213 [----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 00007fdc12a6e900 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=00007fdc130260b0 CR3=0000000017e54000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f7e0b968000 CR3=000000000c85a000 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=46f4795d83f4fc825446dc34eb09b7e0 XMM02=2c67c8bc2e329bc3000000000011b210 XMM03=fb795ef6d65770560000000000121bd0 XMM04=cc7cdeaa374d07e200000000000ae988 XMM05=751b9502027dc0b900000000001316f8 XMM06=be7cc2aeb325992000000000001308d0 XMM07=e042d86d42eb936e0000000000121ea8 XMM08=32f70c0cf70d8540000000000011b270 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000