[ 25.362324] BUG: Bad rss-counter state mm:00000000bfe814b5 type:MM_FILEPAGES val:33 [ 25.363583] BUG: Bad rss-counter state mm:00000000bfe814b5 type:MM_ANONPAGES val:22 [ 25.405439] ================================================================== [ 25.406354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.407287] Read of size 8 at addr ffff88800ccad058 by task sshd/218 [ 25.408048] [ 25.408269] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.409259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.410243] Call Trace: [ 25.410559] [ 25.410842] dump_stack_lvl+0x91/0xf0 [ 25.411341] print_report+0xcc/0x620 [ 25.411819] ? __virt_addr_valid+0x102/0x340 [ 25.412377] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.413004] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.413629] kasan_report+0xbe/0xf0 [ 25.414102] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.414720] vma_interval_tree_remove+0xc75/0xec0 [ 25.415319] vma_prepare+0xc54/0x11a0 [ 25.415805] __split_vma+0x5af/0x950 [ 25.416276] ? __pfx___split_vma+0x10/0x10 [ 25.416803] ? find_held_lock+0x2c/0x110 [ 25.417332] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.417925] ? lock_is_held_type+0x9f/0x120 [ 25.418469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.419073] ? mtree_range_walk+0x632/0x900 [ 25.419620] ? mas_walk+0x5c7/0x7c0 [ 25.420106] do_vmi_munmap+0x1f1/0x2b0 [ 25.420640] mmap_region+0x1f9/0x2660 [ 25.421188] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.421717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.422432] ? __pfx_lock_acquire+0x10/0x10 [ 25.422964] ? __pfx_mmap_region+0x10/0x10 [ 25.423487] ? security_mmap_addr+0x7d/0xa0 [ 25.424019] ? get_unmapped_area+0x1f5/0x3f0 [ 25.424560] do_mmap+0x854/0xf00 [ 25.424998] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.425486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.426067] ksys_mmap_pgoff+0x3af/0x500 [ 25.426568] do_syscall_64+0x3f/0x90 [ 25.427040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.427675] RIP: 0033:0x7f3749574d82 [ 25.428126] 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 [ 25.430231] RSP: 002b:00007fff62dd53e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.431124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3749574d82 [ 25.431959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37489ae000 [ 25.432797] RBP: 00007f37489ae000 R08: 0000000000000009 R09: 0000000000001000 [ 25.433633] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dc9f9eec0 [ 25.434486] R13: 00007fff62dd5400 R14: 00007fff62dd5430 R15: 00007fff62dd5790 [ 25.435349] [ 25.435638] [ 25.435856] Allocated by task 211: [ 25.436280] kasan_save_stack+0x22/0x50 [ 25.436794] kasan_set_track+0x25/0x30 [ 25.437285] __kasan_slab_alloc+0x59/0x70 [ 25.437824] kmem_cache_alloc+0x16b/0x370 [ 25.438340] vm_area_dup+0x20/0x160 [ 25.438792] __split_vma+0x170/0x950 [ 25.439266] split_vma+0xc6/0x110 [ 25.439707] mprotect_fixup+0x8d2/0xb30 [ 25.440204] do_mprotect_pkey+0x87e/0xd40 [ 25.440728] __x64_sys_mprotect+0x78/0xc0 [ 25.441250] do_syscall_64+0x3f/0x90 [ 25.441737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.442383] [ 25.442595] Freed by task 211: [ 25.442994] kasan_save_stack+0x22/0x50 [ 25.443490] kasan_set_track+0x25/0x30 [ 25.443981] kasan_save_free_info+0x2b/0x50 [ 25.444505] __kasan_slab_free+0x10a/0x190 [ 25.445031] kmem_cache_free+0x10d/0x4d0 [ 25.445543] rcu_core+0x8c8/0x2860 [ 25.446013] __do_softirq+0x1b7/0x7d4 [ 25.446486] [ 25.446698] Last potentially related work creation: [ 25.447273] kasan_save_stack+0x22/0x50 [ 25.447770] __kasan_record_aux_stack+0x8e/0xa0 [ 25.448339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.448971] remove_vma+0x139/0x170 [ 25.449417] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.449974] do_vmi_munmap+0x1f1/0x2b0 [ 25.450532] __vm_munmap+0x138/0x3a0 [ 25.450997] __x64_sys_munmap+0x59/0x80 [ 25.451497] do_syscall_64+0x3f/0x90 [ 25.451968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.452611] [ 25.452822] Second to last potentially related work creation: [ 25.453492] kasan_save_stack+0x22/0x50 [ 25.454003] __kasan_record_aux_stack+0x8e/0xa0 [ 25.454572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.455207] remove_vma+0x139/0x170 [ 25.455657] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.456213] do_vmi_munmap+0x1f1/0x2b0 [ 25.456672] mmap_region+0x1f9/0x2660 [ 25.457129] do_mmap+0x854/0xf00 [ 25.457543] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.458015] ksys_mmap_pgoff+0x3af/0x500 [ 25.458493] do_syscall_64+0x3f/0x90 [ 25.458941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.459550] [ 25.459753] The buggy address belongs to the object at ffff88800ccad000 [ 25.459753] which belongs to the cache vm_area_struct of size 168 [ 25.461137] The buggy address is located 88 bytes inside of [ 25.461137] freed 168-byte region [ffff88800ccad000, ffff88800ccad0a8) [ 25.462456] [ 25.462662] The buggy address belongs to the physical page: [ 25.463277] page:00000000de52a5ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xccad [ 25.464291] memcg:ffff88800d1f9301 [ 25.464693] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.465349] page_type: 0xffffffff() [ 25.465813] raw: 0100000000000200 ffff88800879fc80 ffffea0000369080 dead000000000003 [ 25.466726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1f9301 [ 25.467620] page dumped because: kasan: bad access detected [ 25.468302] [ 25.468521] Memory state around the buggy address: [ 25.469123] ffff88800ccacf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 25.469986] ffff88800ccacf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.470849] >ffff88800ccad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.471717] ^ [ 25.472441] ffff88800ccad080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 25.473302] ffff88800ccad100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.474176] ================================================================== [ 25.475096] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.747933] BUG: Bad rss-counter state mm:00000000b373e729 type:MM_FILEPAGES val:33 [ 27.749091] BUG: Bad rss-counter state mm:00000000b373e729 type:MM_ANONPAGES val:22 [ 28.136712] BUG: Bad rss-counter state mm:000000000dd1ae4e type:MM_FILEPAGES val:33 [ 28.137635] BUG: Bad rss-counter state mm:000000000dd1ae4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2972' (ECDSA) to the list of known hosts. 2023/06/19 21:20:38 fuzzer started 2023/06/19 21:20:38 dialing manager at localhost:44161 2023/06/19 21:20:38 checking machine... 2023/06/19 21:20:38 checking revisions... [ 28.816990] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:20:38 testing simple program... [ 28.866601] cgroup: Unknown subsys name 'net' [ 28.904994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:20:36 Registers: info registers vcpu 0 RAX=ffff88800d8d0000 RBX=ffff8880146751c0 RCX=ffff88800d8d7a20 RDX=ffff88800d8d7a00 RSI=ffff8880146751c0 RDI=ffff88800d8d79b0 RBP=ffff88800d8d7a00 RSP=ffff88800d8d7968 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88800d8d7a00 R11=00000000000b6996 R12=ffff88800d8d79b0 R13=ffff88800d8d7a28 R14=ffff88800d8d7a48 R15=ffff88800d8d7a00 RIP=ffffffff84508188 RFL=00000282 [--S----] 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 00007f988b220900 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=00007ffce491f000 CR3=000000000dbd2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fabc4ce1400 CR3=0000000008da4000 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=df361f66f5e9a295994b32d2cd586896 XMM02=ec2efd57dc4c00df000000000011e178 XMM03=3a034ade82014c9e000000000011e248 XMM04=cd036fcf531fd92b00000000000ae988 XMM05=751b9502027dc0b90000000000134b88 XMM06=87a25d8617a369e80000000000133d60 XMM07=e042d86d42eb936e0000000000123f60 XMM08=3a034ade82014c9e000000000011e248 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000