[ 24.162579] BUG: Bad rss-counter state mm:00000000f612a403 type:MM_FILEPAGES val:33 [ 24.163849] BUG: Bad rss-counter state mm:00000000f612a403 type:MM_ANONPAGES val:22 [ 24.424077] ================================================================== [ 24.425057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.426075] Read of size 8 at addr ffff88801a347d08 by task sshd/219 [ 24.426909] [ 24.427145] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.428247] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.429313] Call Trace: [ 24.429653] [ 24.429988] dump_stack_lvl+0x91/0xf0 [ 24.430535] print_report+0xcc/0x620 [ 24.431051] ? __virt_addr_valid+0x102/0x340 [ 24.431647] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.432298] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.432956] kasan_report+0xbe/0xf0 [ 24.433462] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.434151] vma_interval_tree_remove+0xc75/0xec0 [ 24.434806] vma_prepare+0xc54/0x11a0 [ 24.435322] __split_vma+0x5af/0x950 [ 24.435829] ? __pfx___split_vma+0x10/0x10 [ 24.436393] ? find_held_lock+0x2c/0x110 [ 24.436957] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.437555] ? lock_is_held_type+0x9f/0x120 [ 24.438149] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.438805] ? mtree_range_walk+0x632/0x900 [ 24.439398] ? mas_walk+0x5c7/0x7c0 [ 24.439910] do_vmi_munmap+0x1f1/0x2b0 [ 24.440440] mmap_region+0x1f9/0x2660 [ 24.440957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.441510] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.442291] ? __pfx_lock_acquire+0x10/0x10 [ 24.442872] ? __pfx_mmap_region+0x10/0x10 [ 24.443448] ? security_mmap_addr+0x7d/0xa0 [ 24.444020] ? get_unmapped_area+0x1f5/0x3f0 [ 24.444614] do_mmap+0x854/0xf00 [ 24.445085] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.445609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.446223] ksys_mmap_pgoff+0x3af/0x500 [ 24.446767] do_syscall_64+0x3f/0x90 [ 24.447275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.447973] RIP: 0033:0x7f3464aa8d82 [ 24.448463] 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 [ 24.450791] RSP: 002b:00007ffd0e8e27a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.451767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3464aa8d82 [ 24.452683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3463ee2000 [ 24.453614] RBP: 00007f3463ee2000 R08: 0000000000000009 R09: 0000000000001000 [ 24.454562] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628d6df0ec0 [ 24.455483] R13: 00007ffd0e8e27c0 R14: 00007ffd0e8e27f0 R15: 00007ffd0e8e2b50 [ 24.456413] [ 24.456731] [ 24.456960] Allocated by task 206: [ 24.457420] kasan_save_stack+0x22/0x50 [ 24.457944] kasan_set_track+0x25/0x30 [ 24.458434] __kasan_slab_alloc+0x59/0x70 [ 24.458954] kmem_cache_alloc+0x16b/0x370 [ 24.459464] vm_area_dup+0x20/0x160 [ 24.459918] __split_vma+0x170/0x950 [ 24.460375] split_vma+0xc6/0x110 [ 24.460814] mprotect_fixup+0x8d2/0xb30 [ 24.461313] do_mprotect_pkey+0x87e/0xd40 [ 24.461849] __x64_sys_mprotect+0x78/0xc0 [ 24.462362] do_syscall_64+0x3f/0x90 [ 24.462837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.463476] [ 24.463686] Freed by task 111: [ 24.464077] kasan_save_stack+0x22/0x50 [ 24.464576] kasan_set_track+0x25/0x30 [ 24.465066] kasan_save_free_info+0x2b/0x50 [ 24.465593] __kasan_slab_free+0x10a/0x190 [ 24.466136] kmem_cache_free+0x10d/0x4d0 [ 24.466638] rcu_core+0x8c8/0x2860 [ 24.467079] __do_softirq+0x1b7/0x7d4 [ 24.467554] [ 24.467777] Last potentially related work creation: [ 24.468358] kasan_save_stack+0x22/0x50 [ 24.468864] __kasan_record_aux_stack+0x8e/0xa0 [ 24.469510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.470163] remove_vma+0x139/0x170 [ 24.470609] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.471162] do_vmi_munmap+0x1f1/0x2b0 [ 24.471641] __vm_munmap+0x138/0x3a0 [ 24.472107] __x64_sys_munmap+0x59/0x80 [ 24.472599] do_syscall_64+0x3f/0x90 [ 24.473075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.473724] [ 24.473943] The buggy address belongs to the object at ffff88801a347cb0 [ 24.473943] which belongs to the cache vm_area_struct of size 168 [ 24.475408] The buggy address is located 88 bytes inside of [ 24.475408] freed 168-byte region [ffff88801a347cb0, ffff88801a347d58) [ 24.476800] [ 24.477014] The buggy address belongs to the physical page: [ 24.477664] page:00000000c3e5709c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a347 [ 24.478781] memcg:ffff88801a30dc01 [ 24.479201] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.479841] page_type: 0xffffffff() [ 24.480291] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.481209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a30dc01 [ 24.482115] page dumped because: kasan: bad access detected [ 24.482770] [ 24.482983] Memory state around the buggy address: [ 24.483566] ffff88801a347c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.484430] ffff88801a347c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.485284] >ffff88801a347d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.486129] ^ [ 24.486564] ffff88801a347d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.487421] ffff88801a347e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.488273] ================================================================== [ 24.489195] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.841363] BUG: Bad rss-counter state mm:00000000cd2064dc type:MM_FILEPAGES val:33 [ 26.842331] BUG: Bad rss-counter state mm:00000000cd2064dc type:MM_ANONPAGES val:22 [ 27.447560] BUG: Bad rss-counter state mm:00000000c67a84da type:MM_FILEPAGES val:33 [ 27.448782] BUG: Bad rss-counter state mm:00000000c67a84da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42274' (ECDSA) to the list of known hosts. 2023/06/20 18:53:29 fuzzer started 2023/06/20 18:53:29 dialing manager at localhost:36067 2023/06/20 18:53:29 checking machine... 2023/06/20 18:53:29 checking revisions... [ 28.097286] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:53:29 testing simple program... [ 28.150001] cgroup: Unknown subsys name 'net' [ 28.224554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:53:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d9f9f8 RCX=ffffffff860d8201 RDX=1ffff110011b3f40 RSI=ffffffff8180c6a2 RDI=ffff888008d9fa00 RBP=0000000000000000 RSP=ffff888008d9f910 R8 =ffffffff860d825a R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000010b8d R12=ffff888008d9f9f8 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800ee03d80 RIP=ffffffff813ad4be RFL=00000212 [----A--] 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=00007f44f2973650 CR3=000000000b372000 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=ffffffff818dac68 RBX=ffffffff85e0bef8 RCX=ffffffff818dae7a RDX=0000000000000000 RSI=ffffffff8614dcd6 RDI=ffffffff85e0bef8 RBP=ffffffff85e0befc RSP=ffff8880147773c8 R8 =ffffffff8614dcd6 R9 =ffff8880147774c0 R10=0000000000038001 R11=000000000002454d R12=ffffffff85e0bef8 R13=ffffffff85e0bef8 R14=ffffffff85e0bef8 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 00007f13c595a900 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=00007f13c4ded530 CR3=000000000b368000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=765de960560632b700000000000ae988 XMM05=6be2b90a0e717d530000000000132e98 XMM06=806171799158d9670000000000131648 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000