[ 30.545859] BUG: Bad rss-counter state mm:00000000a98e69eb type:MM_FILEPAGES val:33 [ 30.546872] BUG: Bad rss-counter state mm:00000000a98e69eb type:MM_ANONPAGES val:22 [ 30.703243] ================================================================== [ 30.704136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.705084] Read of size 8 at addr ffff88800dd94880 by task sshd/221 [ 30.705838] [ 30.706049] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.707024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.707997] Call Trace: [ 30.708331] [ 30.708615] dump_stack_lvl+0x91/0xf0 [ 30.709104] print_report+0xcc/0x620 [ 30.709603] ? __virt_addr_valid+0x102/0x340 [ 30.710154] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710770] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711384] kasan_report+0xbe/0xf0 [ 30.711855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712491] vma_interval_tree_remove+0xc75/0xec0 [ 30.713086] vma_prepare+0xc54/0x11a0 [ 30.713560] __split_vma+0x5af/0x950 [ 30.714024] ? __pfx___split_vma+0x10/0x10 [ 30.714540] ? find_held_lock+0x2c/0x110 [ 30.715057] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.715618] ? lock_is_held_type+0x9f/0x120 [ 30.716155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.716753] ? mtree_range_walk+0x632/0x900 [ 30.717294] ? mas_walk+0x5c7/0x7c0 [ 30.717765] do_vmi_munmap+0x1f1/0x2b0 [ 30.718251] mmap_region+0x1f9/0x2660 [ 30.718725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.719228] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.719939] ? __pfx_lock_acquire+0x10/0x10 [ 30.720473] ? __pfx_mmap_region+0x10/0x10 [ 30.720992] ? security_mmap_addr+0x7d/0xa0 [ 30.721510] ? get_unmapped_area+0x1f5/0x3f0 [ 30.722054] do_mmap+0x854/0xf00 [ 30.722490] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.722974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.723526] ksys_mmap_pgoff+0x3af/0x500 [ 30.724027] do_syscall_64+0x3f/0x90 [ 30.724518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.725156] RIP: 0033:0x7ff51d524d82 [ 30.725602] 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 [ 30.727675] RSP: 002b:00007fff7faf9458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728572] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff51d524d82 [ 30.729409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff51c95e000 [ 30.730241] RBP: 00007ff51c95e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.731075] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da806b6ec0 [ 30.731915] R13: 00007fff7faf9470 R14: 00007fff7faf94a0 R15: 00007fff7faf9800 [ 30.732783] [ 30.733070] [ 30.733280] Allocated by task 214: [ 30.733699] kasan_save_stack+0x22/0x50 [ 30.734192] kasan_set_track+0x25/0x30 [ 30.734681] __kasan_slab_alloc+0x59/0x70 [ 30.735199] kmem_cache_alloc+0x16b/0x370 [ 30.735703] vm_area_dup+0x20/0x160 [ 30.736145] __split_vma+0x170/0x950 [ 30.736612] split_vma+0xc6/0x110 [ 30.737043] mprotect_fixup+0x8d2/0xb30 [ 30.737533] do_mprotect_pkey+0x87e/0xd40 [ 30.738042] __x64_sys_mprotect+0x78/0xc0 [ 30.738553] do_syscall_64+0x3f/0x90 [ 30.739018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739649] [ 30.739860] Freed by task 214: [ 30.740268] kasan_save_stack+0x22/0x50 [ 30.740763] kasan_set_track+0x25/0x30 [ 30.741253] kasan_save_free_info+0x2b/0x50 [ 30.741783] __kasan_slab_free+0x10a/0x190 [ 30.742312] kmem_cache_free+0x10d/0x4d0 [ 30.742807] rcu_core+0x8c8/0x2860 [ 30.743250] __do_softirq+0x1b7/0x7d4 [ 30.743717] [ 30.743928] Last potentially related work creation: [ 30.744512] kasan_save_stack+0x22/0x50 [ 30.745003] __kasan_record_aux_stack+0x8e/0xa0 [ 30.745583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.746230] remove_vma+0x139/0x170 [ 30.746683] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.747240] do_vmi_munmap+0x1f1/0x2b0 [ 30.747721] __vm_munmap+0x138/0x3a0 [ 30.748261] __x64_sys_munmap+0x59/0x80 [ 30.748760] do_syscall_64+0x3f/0x90 [ 30.749223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749865] [ 30.750075] Second to last potentially related work creation: [ 30.750741] kasan_save_stack+0x22/0x50 [ 30.751235] __kasan_record_aux_stack+0x8e/0xa0 [ 30.751801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.752438] remove_vma+0x139/0x170 [ 30.752889] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.753455] do_vmi_munmap+0x1f1/0x2b0 [ 30.753953] mmap_region+0x1f9/0x2660 [ 30.754432] do_mmap+0x854/0xf00 [ 30.754864] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755359] ksys_mmap_pgoff+0x3af/0x500 [ 30.755873] do_syscall_64+0x3f/0x90 [ 30.756359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757001] [ 30.757216] The buggy address belongs to the object at ffff88800dd94828 [ 30.757216] which belongs to the cache vm_area_struct of size 168 [ 30.758669] The buggy address is located 88 bytes inside of [ 30.758669] freed 168-byte region [ffff88800dd94828, ffff88800dd948d0) [ 30.760079] [ 30.760342] The buggy address belongs to the physical page: [ 30.760986] page:000000002a0837a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd94 [ 30.762043] memcg:ffff888009477d01 [ 30.762466] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763101] page_type: 0xffffffff() [ 30.763541] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b9600 dead000000000002 [ 30.764449] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009477d01 [ 30.765343] page dumped because: kasan: bad access detected [ 30.765995] [ 30.766207] Memory state around the buggy address: [ 30.766780] ffff88800dd94780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.767626] ffff88800dd94800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.768472] >ffff88800dd94880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.769327] ^ [ 30.769731] ffff88800dd94900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.770572] ffff88800dd94980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.771402] ================================================================== [ 30.772502] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.791188] BUG: Bad rss-counter state mm:0000000004354898 type:MM_FILEPAGES val:33 [ 32.792371] BUG: Bad rss-counter state mm:0000000004354898 type:MM_ANONPAGES val:22 [ 33.196057] BUG: Bad rss-counter state mm:000000002e93cfdf type:MM_FILEPAGES val:33 [ 33.197534] BUG: Bad rss-counter state mm:000000002e93cfdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11528' (ECDSA) to the list of known hosts. 2023/06/20 22:01:34 fuzzer started 2023/06/20 22:01:34 dialing manager at localhost:36067 2023/06/20 22:01:34 checking machine... 2023/06/20 22:01:34 checking revisions... [ 33.911950] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:01:34 testing simple program... [ 33.963875] cgroup: Unknown subsys name 'net' [ 34.004134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801c9afe30 RCX=0000000000000000 RDX=1ffff110033044a2 RSI=ffffffff8386c656 RDI=0000000000000007 RBP=ffff888019822510 RSP=ffff88801c9afd18 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888019822000 R13=0000000000000000 R14=0000000000000000 R15=ffff8880162aa280 RIP=ffffffff8386c673 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 00007f2c6c464900 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=00007f2c6ca1b618 CR3=0000000008cc0000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b37a2 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b37a6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b2b RFL=00000297 [--S-APC] 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 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=00007f4f79ac8a00 CR3=000000000c530000 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=bcdef2249a00c8903441fdcfe9dd5e25 XMM02=000000000011a8e0ec2efd57dc4c00df XMM03=00000000001212a0052ac0a39fdf7886 XMM04=9b340131e5d45bc400000000000ae988 XMM05=e4cb8bb95a7664b60000000000132180 XMM06=ea26067abb1dfa9b0000000000131358 XMM07=e042d86d42eb936e0000000000121520 XMM08=052ac0a39fdf7886000000000011a940 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000