syzkaller login: [ 40.268387] BUG: Bad rss-counter state mm:000000002b2bfb95 type:MM_FILEPAGES val:33 [ 40.269082] BUG: Bad rss-counter state mm:000000002b2bfb95 type:MM_ANONPAGES val:22 [ 40.298634] ================================================================== [ 40.299389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.300113] Read of size 8 at addr ffff88800e98a058 by task sshd/221 [ 40.300729] [ 40.300894] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.301521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.302153] Call Trace: [ 40.302450] [ 40.302707] dump_stack_lvl+0x91/0xf0 [ 40.303018] print_report+0xcc/0x620 [ 40.303335] ? __virt_addr_valid+0x102/0x340 [ 40.303671] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.304038] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.304409] kasan_report+0xbe/0xf0 [ 40.304694] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.305067] vma_interval_tree_remove+0xc75/0xec0 [ 40.305447] vma_prepare+0xc54/0x11a0 [ 40.305754] __split_vma+0x5af/0x950 [ 40.306038] ? __pfx___split_vma+0x10/0x10 [ 40.306348] ? find_held_lock+0x2c/0x110 [ 40.306679] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.307056] ? lock_is_held_type+0x9f/0x120 [ 40.307409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.307762] ? mtree_range_walk+0x632/0x900 [ 40.308097] ? mas_walk+0x5c7/0x7c0 [ 40.308402] do_vmi_munmap+0x1f1/0x2b0 [ 40.308728] mmap_region+0x1f9/0x2660 [ 40.309045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.309386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.309900] ? __pfx_lock_acquire+0x10/0x10 [ 40.310253] ? __pfx_mmap_region+0x10/0x10 [ 40.310605] ? security_mmap_addr+0x7d/0xa0 [ 40.310963] ? get_unmapped_area+0x1f5/0x3f0 [ 40.311332] do_mmap+0x854/0xf00 [ 40.311611] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.311920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.312271] ksys_mmap_pgoff+0x3af/0x500 [ 40.312588] do_syscall_64+0x3f/0x90 [ 40.312891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.313346] RIP: 0033:0x7f07bd9dad82 [ 40.313685] 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 [ 40.315131] RSP: 002b:00007ffedc7767d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.315734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07bd9dad82 [ 40.316291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07bce14000 [ 40.316858] RBP: 00007f07bce14000 R08: 0000000000000009 R09: 0000000000001000 [ 40.317419] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cf3e93ec0 [ 40.318014] R13: 00007ffedc7767f0 R14: 00007ffedc776820 R15: 00007ffedc776b80 [ 40.318600] [ 40.318795] [ 40.318940] Allocated by task 214: [ 40.319228] kasan_save_stack+0x22/0x50 [ 40.319567] kasan_set_track+0x25/0x30 [ 40.319901] __kasan_slab_alloc+0x59/0x70 [ 40.320257] kmem_cache_alloc+0x16b/0x370 [ 40.320582] vm_area_dup+0x20/0x160 [ 40.320891] __split_vma+0x170/0x950 [ 40.321216] split_vma+0xc6/0x110 [ 40.321527] mprotect_fixup+0x8d2/0xb30 [ 40.321888] do_mprotect_pkey+0x87e/0xd40 [ 40.322245] __x64_sys_mprotect+0x78/0xc0 [ 40.322605] do_syscall_64+0x3f/0x90 [ 40.322923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.323342] [ 40.323483] Freed by task 214: [ 40.323737] kasan_save_stack+0x22/0x50 [ 40.324060] kasan_set_track+0x25/0x30 [ 40.324374] kasan_save_free_info+0x2b/0x50 [ 40.324713] __kasan_slab_free+0x10a/0x190 [ 40.325051] kmem_cache_free+0x10d/0x4d0 [ 40.325402] rcu_core+0x8c8/0x2860 [ 40.325705] __do_softirq+0x1b7/0x7d4 [ 40.326010] [ 40.326145] Last potentially related work creation: [ 40.326568] kasan_save_stack+0x22/0x50 [ 40.326900] __kasan_record_aux_stack+0x8e/0xa0 [ 40.327271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.327870] remove_vma+0x139/0x170 [ 40.328229] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.328588] do_vmi_munmap+0x1f1/0x2b0 [ 40.328899] __vm_munmap+0x138/0x3a0 [ 40.329198] __x64_sys_munmap+0x59/0x80 [ 40.329532] do_syscall_64+0x3f/0x90 [ 40.329885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.330313] [ 40.330456] The buggy address belongs to the object at ffff88800e98a000 [ 40.330456] which belongs to the cache vm_area_struct of size 168 [ 40.331418] The buggy address is located 88 bytes inside of [ 40.331418] freed 168-byte region [ffff88800e98a000, ffff88800e98a0a8) [ 40.332371] [ 40.332512] The buggy address belongs to the physical page: [ 40.332938] page:000000005c934ec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe98a [ 40.333674] memcg:ffff88800edcf401 [ 40.333949] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.334360] page_type: 0xffffffff() [ 40.334645] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.335235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edcf401 [ 40.335828] page dumped because: kasan: bad access detected [ 40.336252] [ 40.336389] Memory state around the buggy address: [ 40.336765] ffff88800e989f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 40.337345] ffff88800e989f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.337962] >ffff88800e98a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.338584] ^ [ 40.339063] ffff88800e98a080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 40.339663] ffff88800e98a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.340221] ================================================================== [ 40.341009] Disabling lock debugging due to kernel taint [ 42.145923] BUG: Bad rss-counter state mm:00000000e2f6458d type:MM_FILEPAGES val:33 [ 42.146656] BUG: Bad rss-counter state mm:00000000e2f6458d type:MM_ANONPAGES val:22 [ 42.591760] BUG: Bad rss-counter state mm:00000000fb077e5e type:MM_FILEPAGES val:33 [ 42.592519] BUG: Bad rss-counter state mm:00000000fb077e5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58549' (ECDSA) to the list of known hosts. 2023/06/20 09:52:22 fuzzer started 2023/06/20 09:52:22 dialing manager at localhost:44161 2023/06/20 09:52:22 checking machine... 2023/06/20 09:52:22 checking revisions... [ 43.104858] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:52:22 testing simple program... [ 43.147963] cgroup: Unknown subsys name 'net' [ 43.183360] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:52:12 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801598d1c0 RCX=0000000000000000 RDX=1ffff11002b31b2e RSI=ffff88800f7a1f00 RDI=0000000000000002 RBP=0000000000000002 RSP=ffff8880159f7d10 R8 =0000000000000000 R9 =ffffed1002be5f41 R10=ffff888015f2fa0b R11=00000000000b6996 R12=0000000000000002 R13=ffff88800f7a1f00 R14=0000000000000000 R15=ffff888008eaa000 RIP=ffffffff814c07eb RFL=00000246 [---Z-P-] 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 00007f07c135a900 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=00007f07c1911618 CR3=000000000cb72000 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=ffff888015dd5d10 RBX=ffff888008e57dc8 RCX=1ffff11002bbaba2 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008e57dd8 RBP=0000000000000003 RSP=ffff888008e57d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e57dc8 R14=ffff88806cf35000 R15=ffff888019a7f170 RIP=ffffffff8137fc84 RFL=00000246 [---Z-P-] 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 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=00007fbf45c18e00 CR3=000000000d802000 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=2032323a32353a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a32353a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000