[ 24.187134] BUG: Bad rss-counter state mm:0000000003d48429 type:MM_FILEPAGES val:33 [ 24.188822] BUG: Bad rss-counter state mm:0000000003d48429 type:MM_ANONPAGES val:22 [ 24.348789] ================================================================== [ 24.349848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.351113] Read of size 8 at addr ffff88800e084a50 by task sshd/219 [ 24.352020] [ 24.352279] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.353279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.354243] Call Trace: [ 24.354557] [ 24.354836] dump_stack_lvl+0x91/0xf0 [ 24.355326] print_report+0xcc/0x620 [ 24.355809] ? __virt_addr_valid+0x102/0x340 [ 24.356358] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.356975] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.357588] kasan_report+0xbe/0xf0 [ 24.358052] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.358674] vma_interval_tree_remove+0xc75/0xec0 [ 24.359268] vma_prepare+0xc54/0x11a0 [ 24.359745] __split_vma+0x5af/0x950 [ 24.360209] ? __pfx___split_vma+0x10/0x10 [ 24.360735] ? find_held_lock+0x2c/0x110 [ 24.361259] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.361821] ? lock_is_held_type+0x9f/0x120 [ 24.362353] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.362955] ? mtree_range_walk+0x632/0x900 [ 24.363507] ? mas_walk+0x5c7/0x7c0 [ 24.363988] do_vmi_munmap+0x1f1/0x2b0 [ 24.364474] mmap_region+0x1f9/0x2660 [ 24.364978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.365489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.366201] ? __pfx_lock_acquire+0x10/0x10 [ 24.366736] ? __pfx_mmap_region+0x10/0x10 [ 24.367261] ? security_mmap_addr+0x7d/0xa0 [ 24.367789] ? get_unmapped_area+0x1f5/0x3f0 [ 24.368349] do_mmap+0x854/0xf00 [ 24.368791] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.369280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.369846] ksys_mmap_pgoff+0x3af/0x500 [ 24.370343] do_syscall_64+0x3f/0x90 [ 24.370820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.371468] RIP: 0033:0x7f5c7a749d82 [ 24.371916] 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 [ 24.374030] RSP: 002b:00007ffd1e7aec48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.374935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c7a749d82 [ 24.375775] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c79b83000 [ 24.376608] RBP: 00007f5c79b83000 R08: 0000000000000009 R09: 0000000000001000 [ 24.377466] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bed1ebe980 [ 24.378308] R13: 00007ffd1e7aec60 R14: 00007ffd1e7aec90 R15: 00007ffd1e7aeff0 [ 24.379171] [ 24.379462] [ 24.379681] Allocated by task 212: [ 24.380114] kasan_save_stack+0x22/0x50 [ 24.380616] kasan_set_track+0x25/0x30 [ 24.381113] __kasan_slab_alloc+0x59/0x70 [ 24.381633] kmem_cache_alloc+0x16b/0x370 [ 24.382152] vm_area_dup+0x20/0x160 [ 24.382610] __split_vma+0x170/0x950 [ 24.383078] split_vma+0xc6/0x110 [ 24.383519] mprotect_fixup+0x8d2/0xb30 [ 24.384016] do_mprotect_pkey+0x87e/0xd40 [ 24.384531] __x64_sys_mprotect+0x78/0xc0 [ 24.385067] do_syscall_64+0x3f/0x90 [ 24.385536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.386182] [ 24.386397] Freed by task 13: [ 24.386779] kasan_save_stack+0x22/0x50 [ 24.387280] kasan_set_track+0x25/0x30 [ 24.387767] kasan_save_free_info+0x2b/0x50 [ 24.388296] __kasan_slab_free+0x10a/0x190 [ 24.388833] kmem_cache_free+0x10d/0x4d0 [ 24.389337] rcu_core+0x8c8/0x2860 [ 24.389783] __do_softirq+0x1b7/0x7d4 [ 24.390260] [ 24.390476] Last potentially related work creation: [ 24.391064] kasan_save_stack+0x22/0x50 [ 24.391618] __kasan_record_aux_stack+0x8e/0xa0 [ 24.392194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.392855] remove_vma+0x139/0x170 [ 24.393308] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.393867] do_vmi_munmap+0x1f1/0x2b0 [ 24.394346] __vm_munmap+0x138/0x3a0 [ 24.394806] __x64_sys_munmap+0x59/0x80 [ 24.395301] do_syscall_64+0x3f/0x90 [ 24.395775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.396420] [ 24.396656] The buggy address belongs to the object at ffff88800e0849f8 [ 24.396656] which belongs to the cache vm_area_struct of size 168 [ 24.398110] The buggy address is located 88 bytes inside of [ 24.398110] freed 168-byte region [ffff88800e0849f8, ffff88800e084aa0) [ 24.399507] [ 24.399722] The buggy address belongs to the physical page: [ 24.400382] page:00000000e23ba57f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe084 [ 24.401471] memcg:ffff88800e0d3401 [ 24.401899] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.402539] page_type: 0xffffffff() [ 24.402987] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383200 dead000000000004 [ 24.403898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d3401 [ 24.404816] page dumped because: kasan: bad access detected [ 24.405464] [ 24.405681] Memory state around the buggy address: [ 24.406258] ffff88800e084900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.407112] ffff88800e084980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.407955] >ffff88800e084a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.408823] ^ [ 24.409516] ffff88800e084a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.410362] ffff88800e084b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.411207] ================================================================== [ 24.412203] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.976407] BUG: Bad rss-counter state mm:0000000042bac16a type:MM_FILEPAGES val:33 [ 26.977455] BUG: Bad rss-counter state mm:0000000042bac16a type:MM_ANONPAGES val:22 [ 27.531094] BUG: Bad rss-counter state mm:0000000031c6f8a2 type:MM_FILEPAGES val:33 [ 27.532253] BUG: Bad rss-counter state mm:0000000031c6f8a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23028' (ECDSA) to the list of known hosts. 2023/06/20 14:00:53 fuzzer started 2023/06/20 14:00:54 dialing manager at localhost:36067 2023/06/20 14:00:54 checking machine... 2023/06/20 14:00:54 checking revisions... [ 28.248397] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:00:54 testing simple program... [ 28.287387] cgroup: Unknown subsys name 'net' [ 28.322649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:00:53 Registers: info registers vcpu 0 RAX=1ffff110031fef43 RBX=ffff888018ff79e8 RCX=1ffff11001d00ed2 RDX=dffffc0000000000 RSI=ffff88800fc8ff60 RDI=ffff888018ff7a18 RBP=ffff88800eda72d8 RSP=ffff88800efc76c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800fc8ff40 R13=0000000000000000 R14=ffff88800cc64d58 R15=ffff88800cc64d10 RIP=ffffffff8184767e 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 00007f1fdb089700 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=00007f77aa1a4b20 CR3=000000000e162000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30363137352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffffea00006e6cc0 RCX=0000000000000000 RDX=ffff88800c6f9b40 RSI=ffffffff8176424d RDI=0000000000000001 RBP=ffffea00006e6cc0 RSP=ffff88801c64fbc0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800c5c00e8 R13=0000000000000001 R14=ffff8880159bbcc0 R15=ffffea00006e6cc0 RIP=ffffffff814c0880 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f696426f900 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=00007f6964826618 CR3=000000000ca4e000 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=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