[ 36.174437] BUG: Bad rss-counter state mm:0000000084a50eb9 type:MM_FILEPAGES val:33 [ 36.175368] BUG: Bad rss-counter state mm:0000000084a50eb9 type:MM_ANONPAGES val:22 [ 36.291238] ================================================================== [ 36.291946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.292595] Read of size 8 at addr ffff88800e4e2140 by task sshd/219 [ 36.293140] [ 36.293288] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.293864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.294540] Call Trace: [ 36.294771] [ 36.294980] dump_stack_lvl+0x91/0xf0 [ 36.295330] print_report+0xcc/0x620 [ 36.295893] ? __virt_addr_valid+0x102/0x340 [ 36.296272] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.296727] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.297164] kasan_report+0xbe/0xf0 [ 36.297495] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.297996] vma_interval_tree_remove+0xc75/0xec0 [ 36.298432] vma_prepare+0xc54/0x11a0 [ 36.298763] __split_vma+0x5af/0x950 [ 36.299090] ? __pfx___split_vma+0x10/0x10 [ 36.299453] ? find_held_lock+0x2c/0x110 [ 36.299853] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.300251] ? lock_is_held_type+0x9f/0x120 [ 36.300627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.301048] ? mtree_range_walk+0x632/0x900 [ 36.301428] ? mas_walk+0x5c7/0x7c0 [ 36.301748] do_vmi_munmap+0x1f1/0x2b0 [ 36.302107] mmap_region+0x1f9/0x2660 [ 36.302437] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.302770] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.303232] ? __pfx_lock_acquire+0x10/0x10 [ 36.303636] ? __pfx_mmap_region+0x10/0x10 [ 36.304008] ? security_mmap_addr+0x7d/0xa0 [ 36.304391] ? get_unmapped_area+0x1f5/0x3f0 [ 36.304781] do_mmap+0x854/0xf00 [ 36.305070] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.305390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.305752] ksys_mmap_pgoff+0x3af/0x500 [ 36.306079] do_syscall_64+0x3f/0x90 [ 36.306388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.306828] RIP: 0033:0x7f91866cbd82 [ 36.307144] 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 [ 36.308631] RSP: 002b:00007fff404c60e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.309269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91866cbd82 [ 36.309867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9185b05000 [ 36.310474] RBP: 00007f9185b05000 R08: 0000000000000009 R09: 0000000000001000 [ 36.311097] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a4ccb5f70 [ 36.311719] R13: 00007fff404c6100 R14: 00007fff404c6130 R15: 00007fff404c6490 [ 36.312376] [ 36.312577] [ 36.312722] Allocated by task 212: [ 36.313025] kasan_save_stack+0x22/0x50 [ 36.313389] kasan_set_track+0x25/0x30 [ 36.313742] __kasan_slab_alloc+0x59/0x70 [ 36.314112] kmem_cache_alloc+0x16b/0x370 [ 36.314462] vm_area_dup+0x20/0x160 [ 36.314779] __split_vma+0x170/0x950 [ 36.315103] split_vma+0xc6/0x110 [ 36.315419] mprotect_fixup+0x8d2/0xb30 [ 36.315799] do_mprotect_pkey+0x87e/0xd40 [ 36.316159] __x64_sys_mprotect+0x78/0xc0 [ 36.316531] do_syscall_64+0x3f/0x90 [ 36.316878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.317340] [ 36.317496] Freed by task 203: [ 36.317775] kasan_save_stack+0x22/0x50 [ 36.318138] kasan_set_track+0x25/0x30 [ 36.318469] kasan_save_free_info+0x2b/0x50 [ 36.318824] __kasan_slab_free+0x10a/0x190 [ 36.319183] kmem_cache_free+0x10d/0x4d0 [ 36.319584] rcu_core+0x8c8/0x2860 [ 36.319882] __do_softirq+0x1b7/0x7d4 [ 36.320224] [ 36.320371] Last potentially related work creation: [ 36.320811] kasan_save_stack+0x22/0x50 [ 36.321168] __kasan_record_aux_stack+0x8e/0xa0 [ 36.321565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.322032] remove_vma+0x139/0x170 [ 36.322343] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.322724] do_vmi_munmap+0x1f1/0x2b0 [ 36.323068] __vm_munmap+0x138/0x3a0 [ 36.323403] __x64_sys_munmap+0x59/0x80 [ 36.323788] do_syscall_64+0x3f/0x90 [ 36.324135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.324624] [ 36.324790] The buggy address belongs to the object at ffff88800e4e20e8 [ 36.324790] which belongs to the cache vm_area_struct of size 168 [ 36.325811] The buggy address is located 88 bytes inside of [ 36.325811] freed 168-byte region [ffff88800e4e20e8, ffff88800e4e2190) [ 36.326828] [ 36.326984] The buggy address belongs to the physical page: [ 36.327446] page:000000003e046dce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4e2 [ 36.328255] memcg:ffff88800e4bf701 [ 36.328562] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.329020] page_type: 0xffffffff() [ 36.329325] raw: 0100000000000200 ffff88800879fc80 ffffea00003ba080 dead000000000005 [ 36.329991] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4bf701 [ 36.330641] page dumped because: kasan: bad access detected [ 36.331149] [ 36.331302] Memory state around the buggy address: [ 36.331774] ffff88800e4e2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.332352] ffff88800e4e2080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.332931] >ffff88800e4e2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.333533] ^ [ 36.334009] ffff88800e4e2180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 36.334599] ffff88800e4e2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.335197] ================================================================== [ 36.336018] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.764217] BUG: Bad rss-counter state mm:00000000169c40f9 type:MM_FILEPAGES val:33 [ 37.764896] BUG: Bad rss-counter state mm:00000000169c40f9 type:MM_ANONPAGES val:22 [ 38.114860] BUG: Bad rss-counter state mm:0000000032783a93 type:MM_FILEPAGES val:33 [ 38.115645] BUG: Bad rss-counter state mm:0000000032783a93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11413' (ECDSA) to the list of known hosts. 2023/06/20 09:02:42 fuzzer started 2023/06/20 09:02:42 dialing manager at localhost:44161 2023/06/20 09:02:42 checking machine... 2023/06/20 09:02:42 checking revisions... [ 38.684078] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:02:42 testing simple program... [ 38.716685] cgroup: Unknown subsys name 'net' [ 38.759670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:02:36 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffff88800f878130 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800f878134 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000202 R13=ffff88800f878170 R14=ffffffff8186b9c5 R15=ffff88800da99080 RIP=ffffffff812e004a RFL=00000046 [---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=00007ffd27058288 CR3=000000000f2ac000 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=2031343a32303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613fda5 RBX=0000000000000001 RCX=ffffffff8613fda0 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85e0250c RBP=ffff888015b777f8 RSP=ffff888015b77730 R8 =ffffffff8613fda0 R9 =ffff888015b777e0 R10=0000000000038001 R11=000000000002244e R12=ffff888015b77800 R13=ffff888015b777e8 R14=ffff888015b777e1 R15=ffff888015b777a0 RIP=ffffffff81130a7b 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 00007f8c71ba7900 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=00007ffdceb3d000 CR3=000000000cfec000 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