syzkaller login: [ 30.613367] BUG: Bad rss-counter state mm:00000000daae93ae type:MM_FILEPAGES val:33 [ 30.615373] BUG: Bad rss-counter state mm:00000000daae93ae type:MM_ANONPAGES val:22 [ 30.785817] ================================================================== [ 30.787008] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.788386] Read of size 8 at addr ffff8880186f74e0 by task sshd/220 [ 30.789215] [ 30.789442] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.790332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.791382] Call Trace: [ 30.791725] [ 30.792014] dump_stack_lvl+0x91/0xf0 [ 30.792547] print_report+0xcc/0x620 [ 30.793048] ? __virt_addr_valid+0x102/0x340 [ 30.793603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794243] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794879] kasan_report+0xbe/0xf0 [ 30.795362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795990] vma_interval_tree_remove+0xc75/0xec0 [ 30.796634] vma_prepare+0xc54/0x11a0 [ 30.797133] __split_vma+0x5af/0x950 [ 30.797614] ? __pfx___split_vma+0x10/0x10 [ 30.798139] ? find_held_lock+0x2c/0x110 [ 30.798661] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.799235] ? lock_is_held_type+0x9f/0x120 [ 30.799795] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.800448] ? mtree_range_walk+0x632/0x900 [ 30.801028] ? mas_walk+0x5c7/0x7c0 [ 30.801516] do_vmi_munmap+0x1f1/0x2b0 [ 30.802024] mmap_region+0x1f9/0x2660 [ 30.802520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.803048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.803794] ? __pfx_lock_acquire+0x10/0x10 [ 30.804346] ? __pfx_mmap_region+0x10/0x10 [ 30.804877] ? security_mmap_addr+0x7d/0xa0 [ 30.805412] ? get_unmapped_area+0x1f5/0x3f0 [ 30.805972] do_mmap+0x854/0xf00 [ 30.806415] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.806919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.807481] ksys_mmap_pgoff+0x3af/0x500 [ 30.808013] do_syscall_64+0x3f/0x90 [ 30.808533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809197] RIP: 0033:0x7fbaca27fd82 [ 30.809662] 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 [ 30.811862] RSP: 002b:00007ffe681e4928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.812838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbaca27fd82 [ 30.813734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbac96b9000 [ 30.814594] RBP: 00007fbac96b9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.815436] R10: 0000000000000812 R11: 0000000000000206 R12: 000056278a18aec0 [ 30.816328] R13: 00007ffe681e4940 R14: 00007ffe681e4970 R15: 00007ffe681e4cd0 [ 30.817209] [ 30.817511] [ 30.817729] Allocated by task 213: [ 30.818172] kasan_save_stack+0x22/0x50 [ 30.818701] kasan_set_track+0x25/0x30 [ 30.819232] __kasan_slab_alloc+0x59/0x70 [ 30.819757] kmem_cache_alloc+0x16b/0x370 [ 30.820309] vm_area_dup+0x20/0x160 [ 30.820781] __split_vma+0x170/0x950 [ 30.821257] split_vma+0xc6/0x110 [ 30.821720] mprotect_fixup+0x8d2/0xb30 [ 30.822232] do_mprotect_pkey+0x87e/0xd40 [ 30.822768] __x64_sys_mprotect+0x78/0xc0 [ 30.823310] do_syscall_64+0x3f/0x90 [ 30.823784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824436] [ 30.824657] Freed by task 213: [ 30.825047] kasan_save_stack+0x22/0x50 [ 30.825554] kasan_set_track+0x25/0x30 [ 30.826044] kasan_save_free_info+0x2b/0x50 [ 30.826578] __kasan_slab_free+0x10a/0x190 [ 30.827109] kmem_cache_free+0x10d/0x4d0 [ 30.827615] rcu_core+0x8c8/0x2860 [ 30.828063] __do_softirq+0x1b7/0x7d4 [ 30.828562] [ 30.828781] Last potentially related work creation: [ 30.829369] kasan_save_stack+0x22/0x50 [ 30.829879] __kasan_record_aux_stack+0x8e/0xa0 [ 30.830448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.831096] remove_vma+0x139/0x170 [ 30.831547] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.832109] do_vmi_munmap+0x1f1/0x2b0 [ 30.832602] __vm_munmap+0x138/0x3a0 [ 30.833070] __x64_sys_munmap+0x59/0x80 [ 30.833564] do_syscall_64+0x3f/0x90 [ 30.834040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834676] [ 30.834897] The buggy address belongs to the object at ffff8880186f7488 [ 30.834897] which belongs to the cache vm_area_struct of size 168 [ 30.836381] The buggy address is located 88 bytes inside of [ 30.836381] freed 168-byte region [ffff8880186f7488, ffff8880186f7530) [ 30.837817] [ 30.838035] The buggy address belongs to the physical page: [ 30.838730] page:00000000b19afa98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186f7 [ 30.839845] memcg:ffff888017143401 [ 30.840297] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.840934] page_type: 0xffffffff() [ 30.841383] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.842298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017143401 [ 30.843187] page dumped because: kasan: bad access detected [ 30.843835] [ 30.844056] Memory state around the buggy address: [ 30.844636] ffff8880186f7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.845481] ffff8880186f7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.846342] >ffff8880186f7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.847220] ^ [ 30.847985] ffff8880186f7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.848874] ffff8880186f7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.849747] ================================================================== [ 30.850900] Disabling lock debugging due to kernel taint [ 33.217375] BUG: Bad rss-counter state mm:00000000e91f0806 type:MM_FILEPAGES val:33 [ 33.218568] BUG: Bad rss-counter state mm:00000000e91f0806 type:MM_ANONPAGES val:22 [ 33.709300] BUG: Bad rss-counter state mm:000000007b8d999e type:MM_FILEPAGES val:33 [ 33.710465] BUG: Bad rss-counter state mm:000000007b8d999e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24104' (ECDSA) to the list of known hosts. 2023/06/21 06:21:49 fuzzer started 2023/06/21 06:21:50 dialing manager at localhost:36067 2023/06/21 06:21:50 checking machine... 2023/06/21 06:21:50 checking revisions... [ 34.460243] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:21:50 testing simple program... [ 34.513088] cgroup: Unknown subsys name 'net' [ 34.575813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:49 Registers: info registers vcpu 0 RAX=ffffffff818080c9 RBX=ffffffff85dfdb10 RCX=ffffffff818080da RDX=0000000000000000 RSI=ffffffff861386ee RDI=ffffffff85dfdb08 RBP=ffffffff85dfdb14 RSP=ffff88800f23f3c0 R8 =ffffffff861386ee R9 =ffff88800f23f4b8 R10=0000000000038001 R11=0000000000020c51 R12=ffffffff85dfdb10 R13=ffffffff85dfdb08 R14=0000000000000002 R15=dffffc0000000000 RIP=ffffffff8112fcab 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 00007f3383269700 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=00007fff9e7b1000 CR3=0000000016700000 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=2039343a31323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31323a3630203132 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007fc8f47dd000 CR3=000000000d65e000 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=11f15eb50b149aa2fe4acb186b75b6d8 XMM02=000000000011a740eff9b2d0a8fce9cb XMM03=000000000011a8102c67c8bc2e329bc3 XMM04=d69984c1bfae93cc00000000000ae988 XMM05=19e9129bd510f2350000000000131b00 XMM06=246242d559db213c0000000000130968 XMM07=e042d86d42eb936e0000000000121fa8 XMM08=5f2e2ef60c770314000000000011a810 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000