[ 23.747909] BUG: Bad rss-counter state mm:00000000c4eda601 type:MM_FILEPAGES val:33 [ 23.749113] BUG: Bad rss-counter state mm:00000000c4eda601 type:MM_ANONPAGES val:22 [ 23.884647] ================================================================== [ 23.885614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.886557] Read of size 8 at addr ffff88800d62fa50 by task sshd/218 [ 23.887335] [ 23.887553] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.888573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.889544] Call Trace: [ 23.889863] [ 23.890169] dump_stack_lvl+0x91/0xf0 [ 23.890661] print_report+0xcc/0x620 [ 23.891150] ? __virt_addr_valid+0x102/0x340 [ 23.891711] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.892341] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.892965] kasan_report+0xbe/0xf0 [ 23.893447] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.894081] vma_interval_tree_remove+0xc75/0xec0 [ 23.894685] vma_prepare+0xc54/0x11a0 [ 23.895164] __split_vma+0x5af/0x950 [ 23.895633] ? __pfx___split_vma+0x10/0x10 [ 23.896177] ? find_held_lock+0x2c/0x110 [ 23.896700] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.897272] ? lock_is_held_type+0x9f/0x120 [ 23.897812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.898425] ? mtree_range_walk+0x632/0x900 [ 23.898985] ? mas_walk+0x5c7/0x7c0 [ 23.899465] do_vmi_munmap+0x1f1/0x2b0 [ 23.899978] mmap_region+0x1f9/0x2660 [ 23.900462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.900977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.901688] ? __pfx_lock_acquire+0x10/0x10 [ 23.902221] ? __pfx_mmap_region+0x10/0x10 [ 23.902751] ? security_mmap_addr+0x7d/0xa0 [ 23.903283] ? get_unmapped_area+0x1f5/0x3f0 [ 23.903845] do_mmap+0x854/0xf00 [ 23.904287] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.904786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.905351] ksys_mmap_pgoff+0x3af/0x500 [ 23.905859] do_syscall_64+0x3f/0x90 [ 23.906344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906998] RIP: 0033:0x7fd835a4cd82 [ 23.907456] 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 [ 23.909625] RSP: 002b:00007ffd4efa36e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.910537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd835a4cd82 [ 23.911390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd834e86000 [ 23.912248] RBP: 00007fd834e86000 R08: 0000000000000009 R09: 0000000000001000 [ 23.913103] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597bbe93b20 [ 23.913957] R13: 00007ffd4efa3700 R14: 00007ffd4efa3730 R15: 00007ffd4efa3a90 [ 23.914820] [ 23.915110] [ 23.915323] Allocated by task 211: [ 23.915749] kasan_save_stack+0x22/0x50 [ 23.916275] kasan_set_track+0x25/0x30 [ 23.916781] __kasan_slab_alloc+0x59/0x70 [ 23.917315] kmem_cache_alloc+0x16b/0x370 [ 23.917834] vm_area_dup+0x20/0x160 [ 23.918291] __split_vma+0x170/0x950 [ 23.918766] split_vma+0xc6/0x110 [ 23.919206] mprotect_fixup+0x8d2/0xb30 [ 23.919713] do_mprotect_pkey+0x87e/0xd40 [ 23.920244] __x64_sys_mprotect+0x78/0xc0 [ 23.920770] do_syscall_64+0x3f/0x90 [ 23.921252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.921899] [ 23.922113] Freed by task 211: [ 23.922506] kasan_save_stack+0x22/0x50 [ 23.923012] kasan_set_track+0x25/0x30 [ 23.923515] kasan_save_free_info+0x2b/0x50 [ 23.924072] __kasan_slab_free+0x10a/0x190 [ 23.924607] kmem_cache_free+0x10d/0x4d0 [ 23.925120] rcu_core+0x8c8/0x2860 [ 23.925571] __do_softirq+0x1b7/0x7d4 [ 23.926058] [ 23.926277] Last potentially related work creation: [ 23.926866] kasan_save_stack+0x22/0x50 [ 23.927373] __kasan_record_aux_stack+0x8e/0xa0 [ 23.927968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.928615] remove_vma+0x139/0x170 [ 23.929070] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.929629] do_vmi_munmap+0x1f1/0x2b0 [ 23.930117] __vm_munmap+0x138/0x3a0 [ 23.930586] __x64_sys_munmap+0x59/0x80 [ 23.931083] do_syscall_64+0x3f/0x90 [ 23.931557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.932210] [ 23.932423] Second to last potentially related work creation: [ 23.933115] kasan_save_stack+0x22/0x50 [ 23.933626] __kasan_record_aux_stack+0x8e/0xa0 [ 23.934203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.934851] remove_vma+0x139/0x170 [ 23.935315] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.935911] do_vmi_munmap+0x1f1/0x2b0 [ 23.936396] __vm_munmap+0x138/0x3a0 [ 23.936872] elf_map+0x26f/0x310 [ 23.937317] load_elf_binary+0x3417/0x5030 [ 23.937854] bprm_execve+0x803/0x1940 [ 23.938321] do_execveat_common+0x734/0x8e0 [ 23.938848] __x64_sys_execve+0x93/0xc0 [ 23.939343] do_syscall_64+0x3f/0x90 [ 23.939832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.940480] [ 23.940694] The buggy address belongs to the object at ffff88800d62f9f8 [ 23.940694] which belongs to the cache vm_area_struct of size 168 [ 23.942192] The buggy address is located 88 bytes inside of [ 23.942192] freed 168-byte region [ffff88800d62f9f8, ffff88800d62faa0) [ 23.943628] [ 23.943859] The buggy address belongs to the physical page: [ 23.944517] page:00000000eac64b1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd62f [ 23.945622] memcg:ffff88800e285301 [ 23.946057] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.946706] page_type: 0xffffffff() [ 23.947159] raw: 0100000000000200 ffff8880087a0c80 ffffea0000357e00 dead000000000008 [ 23.948096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e285301 [ 23.948993] page dumped because: kasan: bad access detected [ 23.949657] [ 23.949875] Memory state around the buggy address: [ 23.950461] ffff88800d62f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.951313] ffff88800d62f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 23.952192] >ffff88800d62fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.953042] ^ [ 23.953741] ffff88800d62fa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 23.954592] ffff88800d62fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.955441] ================================================================== [ 23.956461] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.688796] BUG: Bad rss-counter state mm:000000000fb98c6d type:MM_FILEPAGES val:33 [ 26.689771] BUG: Bad rss-counter state mm:000000000fb98c6d type:MM_ANONPAGES val:22 [ 27.189799] BUG: Bad rss-counter state mm:00000000fa24b529 type:MM_FILEPAGES val:33 [ 27.190837] BUG: Bad rss-counter state mm:00000000fa24b529 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26656' (ECDSA) to the list of known hosts. 2023/06/21 06:59:01 fuzzer started 2023/06/21 06:59:02 dialing manager at localhost:36067 2023/06/21 06:59:02 checking machine... 2023/06/21 06:59:02 checking revisions... [ 27.933406] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:59:02 testing simple program... [ 27.998247] cgroup: Unknown subsys name 'net' [ 28.050585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:01 Registers: info registers vcpu 0 RAX=ffffffff84514288 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806ce09ac0 RSI=ffffffff84514288 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806ce09b40 R13=ffff88806ce09ac0 R14=ffffffff8542a6c0 R15=ffff88806ce09a78 RIP=ffffffff81130641 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=00007f736899a000 CR3=00000000144d4000 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=0232c9823aa261bc85470d881fc9be29 XMM02=000000000011b9f0eff9b2d0a8fce9cb XMM03=000000000011bac02c67c8bc2e329bc3 XMM04=af9ca7d9d2a1408c00000000000ae988 XMM05=dfcdbad4f1609c370000000000133718 XMM06=806171799158d96700000000001335a0 XMM07=e042d86d42eb936e00000000001223f0 XMM08=ade873f879042463000000000011bac0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff888016a083a0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff888016a083a0 RBP=ffffffff84d30840 RSP=ffff8880145bfd00 R8 =0000000000000001 R9 =ffffed1002d4100c R10=ffff888016a08067 R11=00000000000b6a61 R12=ffff888016a083a0 R13=ffff888015a7d1c0 R14=ffffffff87f97640 R15=0000000000000001 RIP=ffffffff812c9518 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 00007f850713b900 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=00007fff2e190000 CR3=000000001b844000 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=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