[ 31.308632] BUG: Bad rss-counter state mm:00000000014bfef3 type:MM_FILEPAGES val:33 [ 31.309855] BUG: Bad rss-counter state mm:00000000014bfef3 type:MM_ANONPAGES val:22 [ 31.347341] ================================================================== [ 31.348217] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.349093] Read of size 8 at addr ffff88800f276a50 by task sshd/219 [ 31.349823] [ 31.350030] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.350851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.351764] Call Trace: [ 31.352067] [ 31.352340] dump_stack_lvl+0x91/0xf0 [ 31.352806] print_report+0xcc/0x620 [ 31.353265] ? __virt_addr_valid+0x102/0x340 [ 31.353789] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354974] kasan_report+0xbe/0xf0 [ 31.355425] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356006] vma_interval_tree_remove+0xc75/0xec0 [ 31.356577] vma_prepare+0xc54/0x11a0 [ 31.357031] __split_vma+0x5af/0x950 [ 31.357482] ? __pfx___split_vma+0x10/0x10 [ 31.357983] ? find_held_lock+0x2c/0x110 [ 31.358512] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.359086] ? lock_is_held_type+0x9f/0x120 [ 31.359615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.360219] ? mtree_range_walk+0x632/0x900 [ 31.360759] ? mas_walk+0x5c7/0x7c0 [ 31.361227] do_vmi_munmap+0x1f1/0x2b0 [ 31.361710] mmap_region+0x1f9/0x2660 [ 31.362189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362725] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.363437] ? __pfx_lock_acquire+0x10/0x10 [ 31.363957] ? __pfx_mmap_region+0x10/0x10 [ 31.364496] ? security_mmap_addr+0x7d/0xa0 [ 31.365031] ? get_unmapped_area+0x1f5/0x3f0 [ 31.365587] do_mmap+0x854/0xf00 [ 31.366029] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.366519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.367080] ksys_mmap_pgoff+0x3af/0x500 [ 31.367591] do_syscall_64+0x3f/0x90 [ 31.368071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368715] RIP: 0033:0x7f5ec87aad82 [ 31.369158] 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 [ 31.371711] RSP: 002b:00007fff26614668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.372943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ec87aad82 [ 31.374227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ec7be4000 [ 31.375414] RBP: 00007f5ec7be4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.376547] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d83e4c2ec0 [ 31.377641] R13: 00007fff26614680 R14: 00007fff266146b0 R15: 00007fff26614a10 [ 31.378774] [ 31.379168] [ 31.379459] Allocated by task 212: [ 31.380037] kasan_save_stack+0x22/0x50 [ 31.380714] kasan_set_track+0x25/0x30 [ 31.381233] __kasan_slab_alloc+0x59/0x70 [ 31.381745] kmem_cache_alloc+0x16b/0x370 [ 31.382291] vm_area_dup+0x20/0x160 [ 31.382752] __split_vma+0x170/0x950 [ 31.383264] split_vma+0xc6/0x110 [ 31.383721] mprotect_fixup+0x8d2/0xb30 [ 31.384285] do_mprotect_pkey+0x87e/0xd40 [ 31.384992] __x64_sys_mprotect+0x78/0xc0 [ 31.385694] do_syscall_64+0x3f/0x90 [ 31.386264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386920] [ 31.387159] Freed by task 212: [ 31.387561] kasan_save_stack+0x22/0x50 [ 31.388054] kasan_set_track+0x25/0x30 [ 31.388715] kasan_save_free_info+0x2b/0x50 [ 31.389444] __kasan_slab_free+0x10a/0x190 [ 31.389998] kmem_cache_free+0x10d/0x4d0 [ 31.390607] rcu_core+0x8c8/0x2860 [ 31.391051] __do_softirq+0x1b7/0x7d4 [ 31.391541] [ 31.391751] Last potentially related work creation: [ 31.392347] kasan_save_stack+0x22/0x50 [ 31.392851] __kasan_record_aux_stack+0x8e/0xa0 [ 31.393449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.394092] remove_vma+0x139/0x170 [ 31.394564] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.395142] do_vmi_munmap+0x1f1/0x2b0 [ 31.395638] __vm_munmap+0x138/0x3a0 [ 31.396253] __x64_sys_munmap+0x59/0x80 [ 31.396925] do_syscall_64+0x3f/0x90 [ 31.397580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.398247] [ 31.398454] The buggy address belongs to the object at ffff88800f2769f8 [ 31.398454] which belongs to the cache vm_area_struct of size 168 [ 31.399943] The buggy address is located 88 bytes inside of [ 31.399943] freed 168-byte region [ffff88800f2769f8, ffff88800f276aa0) [ 31.401432] [ 31.401645] The buggy address belongs to the physical page: [ 31.402322] page:0000000063d693fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf276 [ 31.403425] memcg:ffff888019395401 [ 31.403840] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.404507] page_type: 0xffffffff() [ 31.404958] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.405908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019395401 [ 31.406825] page dumped because: kasan: bad access detected [ 31.407510] [ 31.407728] Memory state around the buggy address: [ 31.408297] ffff88800f276900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.409148] ffff88800f276980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.409998] >ffff88800f276a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410873] ^ [ 31.411582] ffff88800f276a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.412429] ffff88800f276b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.413264] ================================================================== [ 31.414510] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.272080] BUG: Bad rss-counter state mm:0000000055cb5e1e type:MM_FILEPAGES val:33 [ 33.273245] BUG: Bad rss-counter state mm:0000000055cb5e1e type:MM_ANONPAGES val:22 [ 33.708783] BUG: Bad rss-counter state mm:000000005cfa18e0 type:MM_FILEPAGES val:33 [ 33.709789] BUG: Bad rss-counter state mm:000000005cfa18e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46319' (ECDSA) to the list of known hosts. 2023/06/20 20:05:24 fuzzer started 2023/06/20 20:05:24 dialing manager at localhost:36067 2023/06/20 20:05:24 checking machine... 2023/06/20 20:05:24 checking revisions... [ 34.415273] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:05:24 testing simple program... [ 34.471340] cgroup: Unknown subsys name 'net' [ 34.515267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:05:24 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffffffff85dfe190 RCX=ffffffff8180ce88 RDX=0000000000000009 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff88800f5e7840 R8 =ffffffff86139066 R9 =ffff88800f5e7938 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe1a4 R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----A-C] 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 00007f1fc2773900 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=00007f1fc2d2a618 CR3=00000000192e0000 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=0000000000000002 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff8180c705 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 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=00007f92fff20af0 CR3=000000000d580000 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=181989ecfd9e0599f74fc920364c86df XMM02=000000000011cb20ec2efd57dc4c00df XMM03=0000000000122d289f18a41f13d06957 XMM04=b42ed1883c1dad5a00000000000ae988 XMM05=75e58cc6650f54980000000000133a60 XMM06=806171799158d9670000000000132790 XMM07=e042d86d42eb936e0000000000123000 XMM08=9f18a41f13d06957000000000011cb80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000