[ 38.286034] BUG: Bad rss-counter state mm:00000000ae8ddc01 type:MM_FILEPAGES val:33 [ 38.287537] BUG: Bad rss-counter state mm:00000000ae8ddc01 type:MM_ANONPAGES val:22 [ 38.436648] ================================================================== [ 38.437551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.438502] Read of size 8 at addr ffff8880094b5058 by task sshd/221 [ 38.439261] [ 38.439478] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.440488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.441455] Call Trace: [ 38.441779] [ 38.442106] dump_stack_lvl+0x91/0xf0 [ 38.442593] print_report+0xcc/0x620 [ 38.443072] ? __virt_addr_valid+0x102/0x340 [ 38.443622] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.444228] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.444836] kasan_report+0xbe/0xf0 [ 38.445312] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.445940] vma_interval_tree_remove+0xc75/0xec0 [ 38.446541] vma_prepare+0xc54/0x11a0 [ 38.447011] __split_vma+0x5af/0x950 [ 38.447483] ? __pfx___split_vma+0x10/0x10 [ 38.448005] ? find_held_lock+0x2c/0x110 [ 38.448526] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.449087] ? lock_is_held_type+0x9f/0x120 [ 38.449625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.450252] ? mtree_range_walk+0x632/0x900 [ 38.450799] ? mas_walk+0x5c7/0x7c0 [ 38.451270] do_vmi_munmap+0x1f1/0x2b0 [ 38.451768] mmap_region+0x1f9/0x2660 [ 38.452245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.452752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.453471] ? __pfx_lock_acquire+0x10/0x10 [ 38.454007] ? __pfx_mmap_region+0x10/0x10 [ 38.454536] ? security_mmap_addr+0x7d/0xa0 [ 38.455062] ? get_unmapped_area+0x1f5/0x3f0 [ 38.455610] do_mmap+0x854/0xf00 [ 38.456045] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.456537] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.457098] ksys_mmap_pgoff+0x3af/0x500 [ 38.457598] do_syscall_64+0x3f/0x90 [ 38.458080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.458722] RIP: 0033:0x7f4f1b7f3d82 [ 38.459178] 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 [ 38.461297] RSP: 002b:00007ffebd0165e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.462211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f1b7f3d82 [ 38.463068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f1ac2d000 [ 38.463928] RBP: 00007f4f1ac2d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.464802] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e2129bb20 [ 38.465650] R13: 00007ffebd016600 R14: 00007ffebd016630 R15: 00007ffebd016990 [ 38.466511] [ 38.466807] [ 38.467024] Allocated by task 214: [ 38.467459] kasan_save_stack+0x22/0x50 [ 38.467963] kasan_set_track+0x25/0x30 [ 38.468456] __kasan_slab_alloc+0x59/0x70 [ 38.468983] kmem_cache_alloc+0x16b/0x370 [ 38.469497] vm_area_dup+0x20/0x160 [ 38.469961] __split_vma+0x170/0x950 [ 38.470439] split_vma+0xc6/0x110 [ 38.470875] mprotect_fixup+0x8d2/0xb30 [ 38.471379] do_mprotect_pkey+0x87e/0xd40 [ 38.471902] __x64_sys_mprotect+0x78/0xc0 [ 38.472420] do_syscall_64+0x3f/0x90 [ 38.472890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.473548] [ 38.473763] Freed by task 214: [ 38.474173] kasan_save_stack+0x22/0x50 [ 38.474673] kasan_set_track+0x25/0x30 [ 38.475180] kasan_save_free_info+0x2b/0x50 [ 38.475710] __kasan_slab_free+0x10a/0x190 [ 38.476246] kmem_cache_free+0x10d/0x4d0 [ 38.476752] rcu_core+0x8c8/0x2860 [ 38.477199] __do_softirq+0x1b7/0x7d4 [ 38.477674] [ 38.477889] Last potentially related work creation: [ 38.478486] kasan_save_stack+0x22/0x50 [ 38.478995] __kasan_record_aux_stack+0x8e/0xa0 [ 38.479577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.480226] remove_vma+0x139/0x170 [ 38.480679] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.481294] do_vmi_munmap+0x1f1/0x2b0 [ 38.481781] __vm_munmap+0x138/0x3a0 [ 38.482273] __x64_sys_munmap+0x59/0x80 [ 38.482780] do_syscall_64+0x3f/0x90 [ 38.483267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.483921] [ 38.484136] The buggy address belongs to the object at ffff8880094b5000 [ 38.484136] which belongs to the cache vm_area_struct of size 168 [ 38.485619] The buggy address is located 88 bytes inside of [ 38.485619] freed 168-byte region [ffff8880094b5000, ffff8880094b50a8) [ 38.487057] [ 38.487278] The buggy address belongs to the physical page: [ 38.487960] page:00000000580d3c13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94b5 [ 38.489050] memcg:ffff88800e07b501 [ 38.489480] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.490196] page_type: 0xffffffff() [ 38.490654] raw: 0100000000000200 ffff88800879fc80 ffffea00003ff500 dead000000000003 [ 38.491581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e07b501 [ 38.492495] page dumped because: kasan: bad access detected [ 38.493165] [ 38.493385] Memory state around the buggy address: [ 38.493988] ffff8880094b4f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.494840] ffff8880094b4f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.495724] >ffff8880094b5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.496589] ^ [ 38.497365] ffff8880094b5080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.498313] ffff8880094b5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.499234] ================================================================== [ 38.500249] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.309767] BUG: Bad rss-counter state mm:00000000179ebbac type:MM_FILEPAGES val:33 [ 41.310774] BUG: Bad rss-counter state mm:00000000179ebbac type:MM_ANONPAGES val:22 [ 41.806481] BUG: Bad rss-counter state mm:00000000b6fa23c6 type:MM_FILEPAGES val:33 [ 41.807467] BUG: Bad rss-counter state mm:00000000b6fa23c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47197' (ECDSA) to the list of known hosts. 2023/06/20 01:29:48 fuzzer started 2023/06/20 01:29:49 dialing manager at localhost:44161 2023/06/20 01:29:49 checking machine... 2023/06/20 01:29:49 checking revisions... [ 42.567828] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:29:49 testing simple program... [ 42.614788] cgroup: Unknown subsys name 'net' [ 42.683582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:29:34 Registers: info registers vcpu 0 RAX=ffffffff861255df RBX=0000000000000001 RCX=ffffffff861255da RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85df0a88 RBP=ffff8880183f75f8 RSP=ffff8880183f7530 R8 =ffffffff861255da R9 =ffff8880183f75e0 R10=0000000000038001 R11=000000000001ddad R12=ffff8880183f7600 R13=ffff8880183f75e8 R14=ffff8880183f75e1 R15=ffff8880183f75a0 RIP=ffffffff81130a6e 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=000055c342322650 CR3=0000000019aba000 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=c78b46463c63f2b4c9453bce8c560647 XMM02=ec2efd57dc4c00df000000000011cc78 XMM03=400efde97e3cf249000000000011cd48 XMM04=cffe7e940708254000000000000ae988 XMM05=da1e03018d94c3ac00000000001344a0 XMM06=c291bd5c70af25b900000000001331d0 XMM07=fb795ef6d65770560000000000123730 XMM08=2c67c8bc2e329bc3000000000011cce8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff83c194c0 RCX=0000000000000000 RDX=ffff88800f277b68 RSI=ffff8880142bb3c0 RDI=ffff88800caca500 RBP=ffff8880142bb3c0 RSP=ffff88800f277908 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f277b68 R13=ffff88800caca500 R14=ffff8880142bb3e0 R15=0000000000000000 RIP=ffffffff83c194c4 RFL=00000293 [--S-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 00007f6832c54700 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=00007f23422a20b0 CR3=000000000e908000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000