syzkaller login: [ 38.919056] BUG: Bad rss-counter state mm:00000000827500db type:MM_FILEPAGES val:33 [ 38.920090] BUG: Bad rss-counter state mm:00000000827500db type:MM_ANONPAGES val:22 [ 38.954974] ================================================================== [ 38.955988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.957015] Read of size 8 at addr ffff888009780310 by task sshd/220 [ 38.957974] [ 38.958201] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.959233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.960425] Call Trace: [ 38.960773] [ 38.961111] dump_stack_lvl+0x91/0xf0 [ 38.961727] print_report+0xcc/0x620 [ 38.962315] ? __virt_addr_valid+0x102/0x340 [ 38.962981] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.963853] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.964664] kasan_report+0xbe/0xf0 [ 38.965274] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.966036] vma_interval_tree_remove+0xc75/0xec0 [ 38.966777] vma_prepare+0xc54/0x11a0 [ 38.967376] __split_vma+0x5af/0x950 [ 38.967973] ? __pfx___split_vma+0x10/0x10 [ 38.968658] ? find_held_lock+0x2c/0x110 [ 38.969297] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.969891] ? lock_is_held_type+0x9f/0x120 [ 38.970443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.971052] ? mtree_range_walk+0x632/0x900 [ 38.971603] ? mas_walk+0x5c7/0x7c0 [ 38.972090] do_vmi_munmap+0x1f1/0x2b0 [ 38.972601] mmap_region+0x1f9/0x2660 [ 38.973088] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.973613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.974320] ? __pfx_lock_acquire+0x10/0x10 [ 38.974857] ? __pfx_mmap_region+0x10/0x10 [ 38.975383] ? security_mmap_addr+0x7d/0xa0 [ 38.975925] ? get_unmapped_area+0x1f5/0x3f0 [ 38.976498] do_mmap+0x854/0xf00 [ 38.976947] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.977448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.978022] ksys_mmap_pgoff+0x3af/0x500 [ 38.978534] do_syscall_64+0x3f/0x90 [ 38.979023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979679] RIP: 0033:0x7f0f2698ed82 [ 38.980146] 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 [ 38.982277] RSP: 002b:00007ffda595bba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.983175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f2698ed82 [ 38.984024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f25dc8000 [ 38.984889] RBP: 00007f0f25dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.985756] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565487fb1ec0 [ 38.986608] R13: 00007ffda595bbc0 R14: 00007ffda595bbf0 R15: 00007ffda595bf50 [ 38.987470] [ 38.987766] [ 38.987981] Allocated by task 213: [ 38.988426] kasan_save_stack+0x22/0x50 [ 38.988932] kasan_set_track+0x25/0x30 [ 38.989430] __kasan_slab_alloc+0x59/0x70 [ 38.989958] kmem_cache_alloc+0x16b/0x370 [ 38.990473] vm_area_dup+0x20/0x160 [ 38.990927] __split_vma+0x170/0x950 [ 38.991392] split_vma+0xc6/0x110 [ 38.991838] mprotect_fixup+0x8d2/0xb30 [ 38.992348] do_mprotect_pkey+0x87e/0xd40 [ 38.992878] __x64_sys_mprotect+0x78/0xc0 [ 38.993402] do_syscall_64+0x3f/0x90 [ 38.993884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.994523] [ 38.994746] Freed by task 213: [ 38.995132] kasan_save_stack+0x22/0x50 [ 38.995647] kasan_set_track+0x25/0x30 [ 38.996136] kasan_save_free_info+0x2b/0x50 [ 38.996680] __kasan_slab_free+0x10a/0x190 [ 38.997210] kmem_cache_free+0x10d/0x4d0 [ 38.997714] rcu_core+0x8c8/0x2860 [ 38.998162] __do_softirq+0x1b7/0x7d4 [ 38.998658] [ 38.998878] Last potentially related work creation: [ 38.999465] kasan_save_stack+0x22/0x50 [ 38.999984] __kasan_record_aux_stack+0x8e/0xa0 [ 39.000566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.001210] remove_vma+0x139/0x170 [ 39.001660] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.002226] do_vmi_munmap+0x1f1/0x2b0 [ 39.002715] __vm_munmap+0x138/0x3a0 [ 39.003186] __x64_sys_munmap+0x59/0x80 [ 39.003684] do_syscall_64+0x3f/0x90 [ 39.004156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.004817] [ 39.005033] Second to last potentially related work creation: [ 39.005719] kasan_save_stack+0x22/0x50 [ 39.006225] __kasan_record_aux_stack+0x8e/0xa0 [ 39.006799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007434] remove_vma+0x139/0x170 [ 39.007889] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.008448] do_vmi_munmap+0x1f1/0x2b0 [ 39.008935] mmap_region+0x1f9/0x2660 [ 39.009415] do_mmap+0x854/0xf00 [ 39.009842] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.010327] ksys_mmap_pgoff+0x7d/0x500 [ 39.010817] do_syscall_64+0x3f/0x90 [ 39.011288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.011929] [ 39.012141] The buggy address belongs to the object at ffff8880097802b8 [ 39.012141] which belongs to the cache vm_area_struct of size 168 [ 39.013621] The buggy address is located 88 bytes inside of [ 39.013621] freed 168-byte region [ffff8880097802b8, ffff888009780360) [ 39.015016] [ 39.015229] The buggy address belongs to the physical page: [ 39.015880] page:00000000f3cccb0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9780 [ 39.016975] memcg:ffff888009efc701 [ 39.017394] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.018086] page_type: 0xffffffff() [ 39.018528] raw: 0100000000000200 ffff8880087a0c80 ffffea0000315a80 dead00000000000b [ 39.019437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009efc701 [ 39.020337] page dumped because: kasan: bad access detected [ 39.020997] [ 39.021214] Memory state around the buggy address: [ 39.021798] ffff888009780200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.022668] ffff888009780280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.023529] >ffff888009780300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.024412] ^ [ 39.024879] ffff888009780380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.025752] ffff888009780400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.026614] ================================================================== [ 39.027639] Disabling lock debugging due to kernel taint [ 41.197064] BUG: Bad rss-counter state mm:000000005b10767a type:MM_FILEPAGES val:33 [ 41.197898] BUG: Bad rss-counter state mm:000000005b10767a type:MM_ANONPAGES val:22 [ 41.553142] BUG: Bad rss-counter state mm:00000000bfb79ff4 type:MM_FILEPAGES val:33 [ 41.554193] BUG: Bad rss-counter state mm:00000000bfb79ff4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58518' (ECDSA) to the list of known hosts. 2023/06/21 06:28:24 fuzzer started 2023/06/21 06:28:25 dialing manager at localhost:36067 2023/06/21 06:28:25 checking machine... 2023/06/21 06:28:25 checking revisions... [ 42.224728] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:28:25 testing simple program... [ 42.272009] cgroup: Unknown subsys name 'net' [ 42.337509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff864bce01 RDX=1ffff1100d9c1359 RSI=ffffffff813745aa RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =ffffffff864bce30 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888015dc8000 R15=ffff88800ef8dd00 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007f4a73b8f900 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=00007ffdbeabd000 CR3=00000000146b0000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f307b5413c0 CR3=000000000f046000 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=38323a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000