syzkaller login: [ 33.366756] BUG: Bad rss-counter state mm:00000000bdf4ff31 type:MM_FILEPAGES val:33 [ 33.368807] BUG: Bad rss-counter state mm:00000000bdf4ff31 type:MM_ANONPAGES val:22 [ 33.527380] ================================================================== [ 33.528318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.529279] Read of size 8 at addr ffff888016976df0 by task sshd/221 [ 33.530072] [ 33.530424] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.531311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.532361] Call Trace: [ 33.532702] [ 33.532996] dump_stack_lvl+0x91/0xf0 [ 33.533498] print_report+0xcc/0x620 [ 33.534000] ? __virt_addr_valid+0x102/0x340 [ 33.534568] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.535208] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.535859] kasan_report+0xbe/0xf0 [ 33.536340] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.536982] vma_interval_tree_remove+0xc75/0xec0 [ 33.537599] vma_prepare+0xc54/0x11a0 [ 33.538085] __split_vma+0x5af/0x950 [ 33.538571] ? __pfx___split_vma+0x10/0x10 [ 33.539103] ? find_held_lock+0x2c/0x110 [ 33.539625] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.540213] ? lock_is_held_type+0x9f/0x120 [ 33.540765] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.541376] ? mtree_range_walk+0x632/0x900 [ 33.541933] ? mas_walk+0x5c7/0x7c0 [ 33.542413] do_vmi_munmap+0x1f1/0x2b0 [ 33.542913] mmap_region+0x1f9/0x2660 [ 33.543410] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.543948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.544679] ? __pfx_lock_acquire+0x10/0x10 [ 33.545226] ? __pfx_mmap_region+0x10/0x10 [ 33.545767] ? security_mmap_addr+0x7d/0xa0 [ 33.546302] ? get_unmapped_area+0x1f5/0x3f0 [ 33.546867] do_mmap+0x854/0xf00 [ 33.547306] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.547809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.548380] ksys_mmap_pgoff+0x3af/0x500 [ 33.548889] do_syscall_64+0x3f/0x90 [ 33.549384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.550047] RIP: 0033:0x7f6d9d799d82 [ 33.550515] 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 [ 33.552697] RSP: 002b:00007fff358c9688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.553625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d9d799d82 [ 33.554499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d9cbd3000 [ 33.555375] RBP: 00007f6d9cbd3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.556266] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ded96bb20 [ 33.557127] R13: 00007fff358c96a0 R14: 00007fff358c96d0 R15: 00007fff358c9a30 [ 33.557997] [ 33.558290] [ 33.558511] Allocated by task 214: [ 33.558943] kasan_save_stack+0x22/0x50 [ 33.559473] kasan_set_track+0x25/0x30 [ 33.559998] __kasan_slab_alloc+0x59/0x70 [ 33.560540] kmem_cache_alloc+0x16b/0x370 [ 33.561080] vm_area_dup+0x20/0x160 [ 33.561543] __split_vma+0x170/0x950 [ 33.562016] split_vma+0xc6/0x110 [ 33.562467] mprotect_fixup+0x8d2/0xb30 [ 33.562981] do_mprotect_pkey+0x87e/0xd40 [ 33.563515] __x64_sys_mprotect+0x78/0xc0 [ 33.564058] do_syscall_64+0x3f/0x90 [ 33.564542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.565194] [ 33.565414] Freed by task 214: [ 33.565815] kasan_save_stack+0x22/0x50 [ 33.566335] kasan_set_track+0x25/0x30 [ 33.566830] kasan_save_free_info+0x2b/0x50 [ 33.567377] __kasan_slab_free+0x10a/0x190 [ 33.567927] kmem_cache_free+0x10d/0x4d0 [ 33.568450] rcu_core+0x8c8/0x2860 [ 33.568912] __do_softirq+0x1b7/0x7d4 [ 33.569401] [ 33.569624] Last potentially related work creation: [ 33.570227] kasan_save_stack+0x22/0x50 [ 33.570736] __kasan_record_aux_stack+0x8e/0xa0 [ 33.571326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.572016] remove_vma+0x139/0x170 [ 33.572485] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.573067] do_vmi_munmap+0x1f1/0x2b0 [ 33.573569] __vm_munmap+0x138/0x3a0 [ 33.574060] __x64_sys_munmap+0x59/0x80 [ 33.574576] do_syscall_64+0x3f/0x90 [ 33.575057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.575719] [ 33.575940] The buggy address belongs to the object at ffff888016976d98 [ 33.575940] which belongs to the cache vm_area_struct of size 168 [ 33.577446] The buggy address is located 88 bytes inside of [ 33.577446] freed 168-byte region [ffff888016976d98, ffff888016976e40) [ 33.578902] [ 33.579128] The buggy address belongs to the physical page: [ 33.579831] page:00000000fcb26036 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16976 [ 33.580934] memcg:ffff8880095b4501 [ 33.581363] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.582022] page_type: 0xffffffff() [ 33.582476] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.583418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095b4501 [ 33.584339] page dumped because: kasan: bad access detected [ 33.585007] [ 33.585223] Memory state around the buggy address: [ 33.585810] ffff888016976c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.586667] ffff888016976d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.587541] >ffff888016976d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.588403] ^ [ 33.589221] ffff888016976e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.590084] ffff888016976e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.590942] ================================================================== [ 33.591971] Disabling lock debugging due to kernel taint [ 35.618754] BUG: Bad rss-counter state mm:000000001fbe464f type:MM_FILEPAGES val:33 [ 35.619803] BUG: Bad rss-counter state mm:000000001fbe464f type:MM_ANONPAGES val:22 [ 36.082810] BUG: Bad rss-counter state mm:0000000023c3becf type:MM_FILEPAGES val:33 [ 36.083837] BUG: Bad rss-counter state mm:0000000023c3becf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13674' (ECDSA) to the list of known hosts. 2023/06/19 21:58:26 fuzzer started 2023/06/19 21:58:26 dialing manager at localhost:44161 2023/06/19 21:58:26 checking machine... 2023/06/19 21:58:26 checking revisions... [ 36.787261] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:58:26 testing simple program... [ 36.834234] cgroup: Unknown subsys name 'net' [ 36.871412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:58:23 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff8661f20f RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=ffffffff8661f20f RSP=ffff88806ce09a40 R8 =0000000000000007 R9 =ffffffffff600000 R10=ffffffff8661f000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800c6a9d90 RIP=ffffffff811fc73d RFL=00000202 [-------] 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 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=00007f4135ddef10 CR3=000000000ea00000 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=2035323a38353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a38353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010000 RBX=ffff88806cf349c8 RCX=0000000000000000 RDX=ffff88801686d1c0 RSI=ffffffff8159893a RDI=ffff88806cf349c8 RBP=0000000000000000 RSP=ffff88806cf09db0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000010000 R11=ffff88806cf09ff8 R12=ffffffffffffffc8 R13=ffff88806cf2c240 R14=ffff888015cdee68 R15=dffffc0000000000 RIP=ffffffff814c07eb RFL=00000082 [--S----] 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 00007f9749209900 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=00007f97491e8020 CR3=0000000019bd8000 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=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