syzkaller login: [ 30.799840] BUG: Bad rss-counter state mm:00000000470146f7 type:MM_FILEPAGES val:33 [ 30.801039] BUG: Bad rss-counter state mm:00000000470146f7 type:MM_ANONPAGES val:22 [ 30.841642] ================================================================== [ 30.842683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.843568] Read of size 8 at addr ffff8880198813f8 by task sshd/220 [ 30.844298] [ 30.844509] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.845322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.846254] Call Trace: [ 30.846557] <TASK> [ 30.846828] dump_stack_lvl+0x91/0xf0 [ 30.847296] print_report+0xcc/0x620 [ 30.847759] ? __virt_addr_valid+0x102/0x340 [ 30.848282] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848864] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849476] kasan_report+0xbe/0xf0 [ 30.849929] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850582] vma_interval_tree_remove+0xc75/0xec0 [ 30.851257] vma_prepare+0xc54/0x11a0 [ 30.851801] __split_vma+0x5af/0x950 [ 30.852328] ? __pfx___split_vma+0x10/0x10 [ 30.852921] ? find_held_lock+0x2c/0x110 [ 30.853532] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.854170] ? lock_is_held_type+0x9f/0x120 [ 30.854777] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.855453] ? mtree_range_walk+0x632/0x900 [ 30.856081] ? mas_walk+0x5c7/0x7c0 [ 30.856615] do_vmi_munmap+0x1f1/0x2b0 [ 30.857175] mmap_region+0x1f9/0x2660 [ 30.857756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.858338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.859136] ? __pfx_lock_acquire+0x10/0x10 [ 30.859732] ? __pfx_mmap_region+0x10/0x10 [ 30.860323] ? security_mmap_addr+0x7d/0xa0 [ 30.860923] ? get_unmapped_area+0x1f5/0x3f0 [ 30.861547] do_mmap+0x854/0xf00 [ 30.862040] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.862595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.863229] ksys_mmap_pgoff+0x3af/0x500 [ 30.863814] do_syscall_64+0x3f/0x90 [ 30.864355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865087] RIP: 0033:0x7efed5da5d82 [ 30.865631] 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 [ 30.868177] RSP: 002b:00007fffffe61ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efed5da5d82 [ 30.870187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efed51df000 [ 30.871146] RBP: 00007efed51df000 R08: 0000000000000009 R09: 0000000000001000 [ 30.872138] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557cc6e15ec0 [ 30.873142] R13: 00007fffffe61d00 R14: 00007fffffe61d30 R15: 00007fffffe62090 [ 30.874153] </TASK> [ 30.874497] [ 30.874745] Allocated by task 213: [ 30.875243] kasan_save_stack+0x22/0x50 [ 30.875834] kasan_set_track+0x25/0x30 [ 30.876405] __kasan_slab_alloc+0x59/0x70 [ 30.877014] kmem_cache_alloc+0x16b/0x370 [ 30.877636] vm_area_dup+0x20/0x160 [ 30.878166] __split_vma+0x170/0x950 [ 30.878717] split_vma+0xc6/0x110 [ 30.879238] mprotect_fixup+0x8d2/0xb30 [ 30.879824] do_mprotect_pkey+0x87e/0xd40 [ 30.880429] __x64_sys_mprotect+0x78/0xc0 [ 30.881034] do_syscall_64+0x3f/0x90 [ 30.881603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882352] [ 30.882605] Freed by task 213: [ 30.883060] kasan_save_stack+0x22/0x50 [ 30.883642] kasan_set_track+0x25/0x30 [ 30.884222] kasan_save_free_info+0x2b/0x50 [ 30.884840] __kasan_slab_free+0x10a/0x190 [ 30.885485] kmem_cache_free+0x10d/0x4d0 [ 30.886076] rcu_core+0x8c8/0x2860 [ 30.886596] __do_softirq+0x1b7/0x7d4 [ 30.887161] [ 30.887412] Last potentially related work creation: [ 30.888102] kasan_save_stack+0x22/0x50 [ 30.888694] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890126] remove_vma+0x139/0x170 [ 30.890643] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891302] do_vmi_munmap+0x1f1/0x2b0 [ 30.891877] __vm_munmap+0x138/0x3a0 [ 30.892432] __x64_sys_munmap+0x59/0x80 [ 30.893021] do_syscall_64+0x3f/0x90 [ 30.893559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894331] [ 30.894583] The buggy address belongs to the object at ffff8880198813a0 [ 30.894583] which belongs to the cache vm_area_struct of size 168 [ 30.896340] The buggy address is located 88 bytes inside of [ 30.896340] freed 168-byte region [ffff8880198813a0, ffff888019881448) [ 30.898011] [ 30.898270] The buggy address belongs to the physical page: [ 30.899076] page:000000004a20829a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19881 [ 30.900371] memcg:ffff88800ca16901 [ 30.900953] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901871] page_type: 0xffffffff() [ 30.902503] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.903776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca16901 [ 30.904976] page dumped because: kasan: bad access detected [ 30.905733] [ 30.905963] Memory state around the buggy address: [ 30.906590] ffff888019881280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.907505] ffff888019881300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.908417] >ffff888019881380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.909467] ^ [ 30.910365] ffff888019881400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.911279] ffff888019881480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.912180] ================================================================== [ 30.913781] Disabling lock debugging due to kernel taint [ 33.269065] BUG: Bad rss-counter state mm:00000000b8937a47 type:MM_FILEPAGES val:33 [ 33.270114] BUG: Bad rss-counter state mm:00000000b8937a47 type:MM_ANONPAGES val:22 [ 33.759834] BUG: Bad rss-counter state mm:000000001cb5798c type:MM_FILEPAGES val:33 [ 33.761088] BUG: Bad rss-counter state mm:000000001cb5798c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38768' (ECDSA) to the list of known hosts. 2023/06/21 05:07:39 fuzzer started 2023/06/21 05:07:39 dialing manager at localhost:36067 2023/06/21 05:07:39 checking machine... 2023/06/21 05:07:39 checking revisions... [ 34.512786] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:07:39 testing simple program... [ 34.554112] cgroup: Unknown subsys name 'net' [ 34.596074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:07:39 Registers: info registers vcpu 0 RAX=00007fe2b0007bd0 RBX=000000000000004e RCX=0000000000000000 RDX=00007fe2bd5926c0 RSI=00007fe2b0007bd0 RDI=0000555aab6f38c0 RBP=0000000000000000 RSP=00007fe2bd592650 R8 =0000000000000000 R9 =0000000000000000 R10=00007fe2bd592788 R11=0000000000000000 R12=0000000000000000 R13=00007fe2b0007bd0 R14=00007fe2b0000ba0 R15=00007fe2bd592788 RIP=0000555aa9f79d8f RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe2bd596700 00000000 00000000 GS =0000 0000000000000000 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=00007fd839ea6000 CR3=0000000015dc8000 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=37303a3530203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039333a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe79a83000 CR3=0000000009ab6000 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