syzkaller login: [ 40.515496] BUG: Bad rss-counter state mm:000000006a77ddd9 type:MM_FILEPAGES val:31 [ 40.516722] BUG: Bad rss-counter state mm:000000006a77ddd9 type:MM_ANONPAGES val:22 [ 40.553852] ================================================================== [ 40.554769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.555658] Read of size 8 at addr ffff88800d8d5ed8 by task sshd/222 [ 40.556378] [ 40.556594] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.557407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.558329] Call Trace: [ 40.558634] [ 40.558908] dump_stack_lvl+0x91/0xf0 [ 40.559374] print_report+0xcc/0x620 [ 40.559838] ? __virt_addr_valid+0x102/0x340 [ 40.560366] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.560966] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.561548] kasan_report+0xbe/0xf0 [ 40.562005] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.562598] vma_interval_tree_remove+0xc75/0xec0 [ 40.563171] vma_prepare+0xc54/0x11a0 [ 40.563644] __split_vma+0x5af/0x950 [ 40.564111] ? __pfx___split_vma+0x10/0x10 [ 40.564660] ? find_held_lock+0x2c/0x110 [ 40.565181] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.565735] ? lock_is_held_type+0x9f/0x120 [ 40.566270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.566879] ? mtree_range_walk+0x632/0x900 [ 40.567420] ? mas_walk+0x5c7/0x7c0 [ 40.567888] do_vmi_munmap+0x1f1/0x2b0 [ 40.568380] mmap_region+0x1f9/0x2660 [ 40.568892] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.569393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.570103] ? __pfx_lock_acquire+0x10/0x10 [ 40.570635] ? __pfx_mmap_region+0x10/0x10 [ 40.571154] ? security_mmap_addr+0x7d/0xa0 [ 40.571677] ? get_unmapped_area+0x1f5/0x3f0 [ 40.572222] do_mmap+0x854/0xf00 [ 40.572665] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.573159] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.573709] ksys_mmap_pgoff+0x3af/0x500 [ 40.574218] do_syscall_64+0x3f/0x90 [ 40.574684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.575323] RIP: 0033:0x7f5ff506ed82 [ 40.575777] 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 [ 40.578057] RSP: 002b:00007ffe6978eb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.578977] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ff506ed82 [ 40.579813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ff44a8000 [ 40.580667] RBP: 00007f5ff44a8000 R08: 0000000000000009 R09: 0000000000001000 [ 40.581642] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a1c570ec0 [ 40.582481] R13: 00007ffe6978eb60 R14: 00007ffe6978eb90 R15: 00007ffe6978eef0 [ 40.583340] [ 40.583640] [ 40.583856] Allocated by task 215: [ 40.584283] kasan_save_stack+0x22/0x50 [ 40.584801] kasan_set_track+0x25/0x30 [ 40.585287] __kasan_slab_alloc+0x59/0x70 [ 40.585809] kmem_cache_alloc+0x16b/0x370 [ 40.586317] vm_area_dup+0x20/0x160 [ 40.586766] __split_vma+0x170/0x950 [ 40.587229] split_vma+0xc6/0x110 [ 40.587657] mprotect_fixup+0x8d2/0xb30 [ 40.588151] do_mprotect_pkey+0x87e/0xd40 [ 40.588674] __x64_sys_mprotect+0x78/0xc0 [ 40.589185] do_syscall_64+0x3f/0x90 [ 40.589658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.590296] [ 40.590512] Freed by task 215: [ 40.590899] kasan_save_stack+0x22/0x50 [ 40.591399] kasan_set_track+0x25/0x30 [ 40.591889] kasan_save_free_info+0x2b/0x50 [ 40.592438] __kasan_slab_free+0x10a/0x190 [ 40.592977] kmem_cache_free+0x10d/0x4d0 [ 40.593472] rcu_core+0x8c8/0x2860 [ 40.593911] __do_softirq+0x1b7/0x7d4 [ 40.594390] [ 40.594607] Last potentially related work creation: [ 40.595198] kasan_save_stack+0x22/0x50 [ 40.595696] __kasan_record_aux_stack+0x8e/0xa0 [ 40.596256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.596866] remove_vma+0x139/0x170 [ 40.597296] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.597826] do_vmi_munmap+0x1f1/0x2b0 [ 40.598287] __vm_munmap+0x138/0x3a0 [ 40.598727] __x64_sys_munmap+0x59/0x80 [ 40.599196] do_syscall_64+0x3f/0x90 [ 40.599646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.600253] [ 40.600486] The buggy address belongs to the object at ffff88800d8d5e80 [ 40.600486] which belongs to the cache vm_area_struct of size 168 [ 40.601864] The buggy address is located 88 bytes inside of [ 40.601864] freed 168-byte region [ffff88800d8d5e80, ffff88800d8d5f28) [ 40.603183] [ 40.603389] The buggy address belongs to the physical page: [ 40.604014] page:00000000cd10c4e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8d5 [ 40.605111] memcg:ffff88800c9bc701 [ 40.605536] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.606221] page_type: 0xffffffff() [ 40.606661] raw: 0100000000000200 ffff88800879fc80 ffffea00003df880 dead000000000003 [ 40.607580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9bc701 [ 40.608482] page dumped because: kasan: bad access detected [ 40.609166] [ 40.609383] Memory state around the buggy address: [ 40.609961] ffff88800d8d5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.610813] ffff88800d8d5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.611672] >ffff88800d8d5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.612541] ^ [ 40.613267] ffff88800d8d5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.614112] ffff88800d8d5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.614957] ================================================================== [ 40.616269] Disabling lock debugging due to kernel taint [ 42.329046] BUG: Bad rss-counter state mm:0000000028fd58c1 type:MM_FILEPAGES val:33 [ 42.329721] BUG: Bad rss-counter state mm:0000000028fd58c1 type:MM_ANONPAGES val:22 [ 42.728688] BUG: Bad rss-counter state mm:00000000afc6c4ef type:MM_FILEPAGES val:33 [ 42.729450] BUG: Bad rss-counter state mm:00000000afc6c4ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33255' (ECDSA) to the list of known hosts. 2023/06/19 19:41:00 fuzzer started 2023/06/19 19:41:01 dialing manager at localhost:44161 2023/06/19 19:41:01 checking machine... 2023/06/19 19:41:01 checking revisions... [ 43.423920] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:41:01 testing simple program... [ 43.474799] cgroup: Unknown subsys name 'net' [ 43.521064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:40:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801590f910 RSI=ffff88801590fc58 RDI=ffff88801590f918 RBP=ffffffff83636790 RSP=ffff88801590f858 R8 =0000000000000001 R9 =ffff88801590f908 R10=0000000000038001 R11=000000000000fc0f R12=ffff88801590f928 R13=ffff88801590f910 R14=ffff88801590fc58 R15=ffff88801590f8c8 RIP=ffffffff81131c58 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 00007f74c8e0f900 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=00007ffe19002000 CR3=000000000e90e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f3c6195c018 CR3=000000000c966000 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=7c89b9767a31da963146f7f6e46e60bd XMM02=2c67c8bc2e329bc3000000000011d1f8 XMM03=fb795ef6d65770560000000000124660 XMM04=8c1d7c569da05ed900000000000ae988 XMM05=59d5b690e0af863b0000000000134168 XMM06=1df137fc23cf017f0000000000132fd0 XMM07=e042d86d42eb936e00000000001248e0 XMM08=dfd3118a804656b8000000000011d258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000