[ 32.251834] BUG: Bad rss-counter state mm:000000008f44e8b8 type:MM_FILEPAGES val:33 [ 32.252740] BUG: Bad rss-counter state mm:000000008f44e8b8 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.368849] ================================================================== [ 32.369557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.370142] Read of size 8 at addr ffff888015a0f310 by task sshd/220 [ 32.370629] [ 32.370782] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.371325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.371940] Call Trace: [ 32.372147] <TASK> [ 32.372323] dump_stack_lvl+0x91/0xf0 [ 32.372629] print_report+0xcc/0x620 [ 32.373194] ? __virt_addr_valid+0x102/0x340 [ 32.373562] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.373956] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.374338] kasan_report+0xbe/0xf0 [ 32.374641] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.375024] vma_interval_tree_remove+0xc75/0xec0 [ 32.375485] vma_prepare+0xc54/0x11a0 [ 32.375816] __split_vma+0x5af/0x950 [ 32.376138] ? __pfx___split_vma+0x10/0x10 [ 32.376487] ? find_held_lock+0x2c/0x110 [ 32.376842] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.377206] ? lock_is_held_type+0x9f/0x120 [ 32.377583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.377985] ? mtree_range_walk+0x632/0x900 [ 32.378351] ? mas_walk+0x5c7/0x7c0 [ 32.378666] do_vmi_munmap+0x1f1/0x2b0 [ 32.379000] mmap_region+0x1f9/0x2660 [ 32.379331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.379683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.380162] ? __pfx_lock_acquire+0x10/0x10 [ 32.380549] ? __pfx_mmap_region+0x10/0x10 [ 32.380908] ? security_mmap_addr+0x7d/0xa0 [ 32.381268] ? get_unmapped_area+0x1f5/0x3f0 [ 32.381692] do_mmap+0x854/0xf00 [ 32.381992] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.382335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.382731] ksys_mmap_pgoff+0x3af/0x500 [ 32.383085] do_syscall_64+0x3f/0x90 [ 32.383413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.383891] RIP: 0033:0x7fbceb29bd82 [ 32.384207] 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 [ 32.385781] RSP: 002b:00007fff4bbab228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.386411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbceb29bd82 [ 32.387010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcea6d5000 [ 32.387608] RBP: 00007fbcea6d5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.388186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b04cb29d90 [ 32.388785] R13: 00007fff4bbab240 R14: 00007fff4bbab270 R15: 00007fff4bbab5d0 [ 32.389414] </TASK> [ 32.389662] [ 32.389808] Allocated by task 213: [ 32.390101] kasan_save_stack+0x22/0x50 [ 32.390453] kasan_set_track+0x25/0x30 [ 32.390838] __kasan_slab_alloc+0x59/0x70 [ 32.391220] kmem_cache_alloc+0x16b/0x370 [ 32.391586] vm_area_dup+0x20/0x160 [ 32.391904] __split_vma+0x170/0x950 [ 32.392235] split_vma+0xc6/0x110 [ 32.392542] mprotect_fixup+0x8d2/0xb30 [ 32.392910] do_mprotect_pkey+0x87e/0xd40 [ 32.393271] __x64_sys_mprotect+0x78/0xc0 [ 32.393694] do_syscall_64+0x3f/0x90 [ 32.394032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.394484] [ 32.394642] Freed by task 213: [ 32.394921] kasan_save_stack+0x22/0x50 [ 32.395267] kasan_set_track+0x25/0x30 [ 32.395601] kasan_save_free_info+0x2b/0x50 [ 32.395976] __kasan_slab_free+0x10a/0x190 [ 32.396339] kmem_cache_free+0x10d/0x4d0 [ 32.396686] rcu_core+0x8c8/0x2860 [ 32.396994] __do_softirq+0x1b7/0x7d4 [ 32.397316] [ 32.397507] Last potentially related work creation: [ 32.397914] kasan_save_stack+0x22/0x50 [ 32.398265] __kasan_record_aux_stack+0x8e/0xa0 [ 32.398674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.399121] remove_vma+0x139/0x170 [ 32.399435] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.399846] do_vmi_munmap+0x1f1/0x2b0 [ 32.400208] __vm_munmap+0x138/0x3a0 [ 32.400532] __x64_sys_munmap+0x59/0x80 [ 32.400936] do_syscall_64+0x3f/0x90 [ 32.401277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.401816] [ 32.401981] The buggy address belongs to the object at ffff888015a0f2b8 [ 32.401981] which belongs to the cache vm_area_struct of size 168 [ 32.403030] The buggy address is located 88 bytes inside of [ 32.403030] freed 168-byte region [ffff888015a0f2b8, ffff888015a0f360) [ 32.404009] [ 32.404156] The buggy address belongs to the physical page: [ 32.404630] page:000000002b2e613b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a0f [ 32.405414] memcg:ffff88800e9c8301 [ 32.405740] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.406188] page_type: 0xffffffff() [ 32.406507] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.407191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9c8301 [ 32.407857] page dumped because: kasan: bad access detected [ 32.408336] [ 32.408492] Memory state around the buggy address: [ 32.408899] ffff888015a0f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.409512] ffff888015a0f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.410111] >ffff888015a0f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.410722] ^ [ 32.411050] ffff888015a0f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.411684] ffff888015a0f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.412280] ================================================================== [ 32.413055] Disabling lock debugging due to kernel taint [ 34.366571] BUG: Bad rss-counter state mm:0000000012e5afdc type:MM_FILEPAGES val:33 [ 34.367420] BUG: Bad rss-counter state mm:0000000012e5afdc type:MM_ANONPAGES val:22 [ 34.735868] BUG: Bad rss-counter state mm:000000001c6874b0 type:MM_FILEPAGES val:33 [ 34.736603] BUG: Bad rss-counter state mm:000000001c6874b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32039' (ECDSA) to the list of known hosts. 2023/06/20 08:42:13 fuzzer started 2023/06/20 08:42:13 dialing manager at localhost:44161 2023/06/20 08:42:13 checking machine... 2023/06/20 08:42:13 checking revisions... [ 35.315110] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:42:13 testing simple program... [ 35.366987] cgroup: Unknown subsys name 'net' [ 35.430936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:42:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f6db803b550 CR3=000000000c964000 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=2033313a32343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a32343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000607f92e02000 RBX=ffff888016616370 RCX=ffff888016616370 RDX=ffff88800af9a280 RSI=ffff888016616370 RDI=ffff88800af9a280 RBP=ffff88800fce7a28 RSP=ffff88800fce7a18 R8 =ffff888016616370 R9 =ffffffff818101af R10=ffffea0000598580 R11=0000000000070006 R12=dffffc0000000000 R13=ffff88800fce7a78 R14=ffff88800af9a280 R15=ffff888016616370 RIP=ffffffff8180b013 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 00007fc57037f900 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=00007fff8fdda000 CR3=000000001caf0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000