[ 32.092644] BUG: Bad rss-counter state mm:000000007b5d4134 type:MM_FILEPAGES val:33 [ 32.093642] BUG: Bad rss-counter state mm:000000007b5d4134 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.256184] ================================================================== [ 32.257395] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.258560] Read of size 8 at addr ffff88800ca35c20 by task sshd/218 [ 32.259497] [ 32.259781] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.260836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.261817] Call Trace: [ 32.262142] [ 32.262424] dump_stack_lvl+0x91/0xf0 [ 32.262917] print_report+0xcc/0x620 [ 32.263401] ? __virt_addr_valid+0x102/0x340 [ 32.263958] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.264586] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.265206] kasan_report+0xbe/0xf0 [ 32.265685] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.266306] vma_interval_tree_remove+0xc75/0xec0 [ 32.266916] vma_prepare+0xc54/0x11a0 [ 32.267404] __split_vma+0x5af/0x950 [ 32.267887] ? __pfx___split_vma+0x10/0x10 [ 32.268429] ? find_held_lock+0x2c/0x110 [ 32.268960] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.269528] ? lock_is_held_type+0x9f/0x120 [ 32.270074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.270684] ? mtree_range_walk+0x632/0x900 [ 32.271242] ? mas_walk+0x5c7/0x7c0 [ 32.271716] do_vmi_munmap+0x1f1/0x2b0 [ 32.272232] mmap_region+0x1f9/0x2660 [ 32.272719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.273238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.273956] ? __pfx_lock_acquire+0x10/0x10 [ 32.274496] ? __pfx_mmap_region+0x10/0x10 [ 32.275031] ? security_mmap_addr+0x7d/0xa0 [ 32.275564] ? get_unmapped_area+0x1f5/0x3f0 [ 32.276139] do_mmap+0x854/0xf00 [ 32.276591] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.277082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.277651] ksys_mmap_pgoff+0x3af/0x500 [ 32.278169] do_syscall_64+0x3f/0x90 [ 32.278656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.279319] RIP: 0033:0x7f761510ed82 [ 32.279780] 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 [ 32.281938] RSP: 002b:00007ffd705f7768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.282862] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f761510ed82 [ 32.283724] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7614548000 [ 32.284584] RBP: 00007f7614548000 R08: 0000000000000009 R09: 0000000000001000 [ 32.285442] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7e7890f70 [ 32.286292] R13: 00007ffd705f7780 R14: 00007ffd705f77b0 R15: 00007ffd705f7b10 [ 32.287157] [ 32.287455] [ 32.287674] Allocated by task 211: [ 32.288116] kasan_save_stack+0x22/0x50 [ 32.288621] kasan_set_track+0x25/0x30 [ 32.289118] __kasan_slab_alloc+0x59/0x70 [ 32.289641] kmem_cache_alloc+0x16b/0x370 [ 32.290159] vm_area_dup+0x20/0x160 [ 32.290618] __split_vma+0x170/0x950 [ 32.291090] split_vma+0xc6/0x110 [ 32.291530] mprotect_fixup+0x8d2/0xb30 [ 32.292055] do_mprotect_pkey+0x87e/0xd40 [ 32.292572] __x64_sys_mprotect+0x78/0xc0 [ 32.293089] do_syscall_64+0x3f/0x90 [ 32.293565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.294203] [ 32.294422] Freed by task 211: [ 32.294819] kasan_save_stack+0x22/0x50 [ 32.295330] kasan_set_track+0x25/0x30 [ 32.295828] kasan_save_free_info+0x2b/0x50 [ 32.296372] __kasan_slab_free+0x10a/0x190 [ 32.296918] kmem_cache_free+0x10d/0x4d0 [ 32.297431] rcu_core+0x8c8/0x2860 [ 32.297880] __do_softirq+0x1b7/0x7d4 [ 32.298355] [ 32.298572] Last potentially related work creation: [ 32.299159] kasan_save_stack+0x22/0x50 [ 32.299668] __kasan_record_aux_stack+0x8e/0xa0 [ 32.300266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.300910] remove_vma+0x139/0x170 [ 32.301367] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.301935] do_vmi_munmap+0x1f1/0x2b0 [ 32.302424] __vm_munmap+0x138/0x3a0 [ 32.302894] __x64_sys_munmap+0x59/0x80 [ 32.303391] do_syscall_64+0x3f/0x90 [ 32.303866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.304517] [ 32.304736] The buggy address belongs to the object at ffff88800ca35bc8 [ 32.304736] which belongs to the cache vm_area_struct of size 168 [ 32.306221] The buggy address is located 88 bytes inside of [ 32.306221] freed 168-byte region [ffff88800ca35bc8, ffff88800ca35c70) [ 32.307628] [ 32.307850] The buggy address belongs to the physical page: [ 32.308533] page:000000005629706a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca35 [ 32.309626] memcg:ffff88800eb58d01 [ 32.310053] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.310755] page_type: 0xffffffff() [ 32.311210] raw: 0100000000000200 ffff88800879fc80 ffffea00005a9b80 dead000000000005 [ 32.312151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb58d01 [ 32.313061] page dumped because: kasan: bad access detected [ 32.313726] [ 32.313947] Memory state around the buggy address: [ 32.314533] ffff88800ca35b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.315401] ffff88800ca35b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.316280] >ffff88800ca35c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.317139] ^ [ 32.317665] ffff88800ca35c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.318528] ffff88800ca35d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.319388] ================================================================== [ 32.320638] Disabling lock debugging due to kernel taint [ 34.993532] BUG: Bad rss-counter state mm:000000005daae1e6 type:MM_FILEPAGES val:33 [ 34.994328] BUG: Bad rss-counter state mm:000000005daae1e6 type:MM_ANONPAGES val:22 [ 35.427558] BUG: Bad rss-counter state mm:000000004a12fbff type:MM_FILEPAGES val:33 [ 35.428346] BUG: Bad rss-counter state mm:000000004a12fbff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38503' (ECDSA) to the list of known hosts. 2023/06/20 10:03:43 fuzzer started 2023/06/20 10:03:44 dialing manager at localhost:44161 2023/06/20 10:03:44 checking machine... 2023/06/20 10:03:44 checking revisions... [ 36.100782] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:03:44 testing simple program... [ 36.160317] cgroup: Unknown subsys name 'net' [ 36.201637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:03:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81364a8e RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8488b000 RSP=ffff888008d87d20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000006ee0 R13=ffffffff85616740 R14=dffffc0000000000 R15=0000000000006ee0 RIP=ffffffff81364a96 RFL=00000047 [---Z-PC] 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=00007f12887df0b0 CR3=000000001581c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84531da7 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880102ffe01 RSI=ffff8880102ffec0 RDI=ffff8880102ffec0 RBP=ffff8880102ff9f8 RSP=ffff8880102ff928 R8 =ffffffff860d1680 R9 =ffff8880102ff9e0 R10=0000000000038001 R11=000000000000fdc6 R12=ffff8880102ffa00 R13=ffff8880102ff9e8 R14=ffff8880102ffec8 R15=ffff8880102ff9a0 RIP=ffffffff8112fbf3 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f504fa11900 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=00007f504ee88430 CR3=000000000c70c000 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=7e8a42789393c4b700000000001205d0 XMM01=bbcd7a2f131c0586574ec28c69e8f86e XMM02=2c67c8bc2e329bc300000000001208a8 XMM03=fb795ef6d65770560000000000124490 XMM04=c52161f5cd68cf0e00000000000ae988 XMM05=751b9502027dc0b90000000000133cb8 XMM06=38c79cbffc086d9b0000000000132e90 XMM07=e042d86d42eb936e0000000000124768 XMM08=7647615cbe864ecd0000000000120908 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000