syzkaller login: [ 72.397095] BUG: Bad rss-counter state mm:00000000428c3db2 type:MM_FILEPAGES val:33 [ 72.398622] BUG: Bad rss-counter state mm:00000000428c3db2 type:MM_ANONPAGES val:22 [ 72.560904] ================================================================== [ 72.561973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.563044] Read of size 8 at addr ffff8880159306b0 by task sshd/219 [ 72.564042] [ 72.564295] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 72.565279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.566426] Call Trace: [ 72.566791] [ 72.567115] dump_stack_lvl+0x91/0xf0 [ 72.567674] print_report+0xcc/0x620 [ 72.568233] ? __virt_addr_valid+0x102/0x340 [ 72.568872] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.569578] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.570289] kasan_report+0xbe/0xf0 [ 72.570831] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.571544] vma_interval_tree_remove+0xc75/0xec0 [ 72.572251] vma_prepare+0xc54/0x11a0 [ 72.572798] __split_vma+0x5af/0x950 [ 72.573342] ? __pfx___split_vma+0x10/0x10 [ 72.573949] ? find_held_lock+0x2c/0x110 [ 72.574548] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.575191] ? lock_is_held_type+0x9f/0x120 [ 72.575808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.576525] ? mtree_range_walk+0x632/0x900 [ 72.577160] ? mas_walk+0x5c7/0x7c0 [ 72.577709] do_vmi_munmap+0x1f1/0x2b0 [ 72.578280] mmap_region+0x1f9/0x2660 [ 72.578838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.579426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.580261] ? __pfx_lock_acquire+0x10/0x10 [ 72.580872] ? __pfx_mmap_region+0x10/0x10 [ 72.581481] ? security_mmap_addr+0x7d/0xa0 [ 72.582094] ? get_unmapped_area+0x1f5/0x3f0 [ 72.582723] do_mmap+0x854/0xf00 [ 72.583226] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.583793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.584453] ksys_mmap_pgoff+0x3af/0x500 [ 72.585034] do_syscall_64+0x3f/0x90 [ 72.585580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.586329] RIP: 0033:0x7fbe911ded82 [ 72.586856] 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 [ 72.589323] RSP: 002b:00007fff10cc9278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.590374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe911ded82 [ 72.591358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe90618000 [ 72.592342] RBP: 00007fbe90618000 R08: 0000000000000009 R09: 0000000000001000 [ 72.593314] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629177c7ec0 [ 72.594291] R13: 00007fff10cc9290 R14: 00007fff10cc92c0 R15: 00007fff10cc9620 [ 72.595283] [ 72.595616] [ 72.595863] Allocated by task 212: [ 72.596368] kasan_save_stack+0x22/0x50 [ 72.596947] kasan_set_track+0x25/0x30 [ 72.597514] __kasan_slab_alloc+0x59/0x70 [ 72.598121] kmem_cache_alloc+0x16b/0x370 [ 72.598718] vm_area_dup+0x20/0x160 [ 72.599238] __split_vma+0x170/0x950 [ 72.599773] split_vma+0xc6/0x110 [ 72.600297] mprotect_fixup+0x8d2/0xb30 [ 72.600869] do_mprotect_pkey+0x87e/0xd40 [ 72.601464] __x64_sys_mprotect+0x78/0xc0 [ 72.602062] do_syscall_64+0x3f/0x90 [ 72.602607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.603349] [ 72.603595] Freed by task 212: [ 72.604060] kasan_save_stack+0x22/0x50 [ 72.604637] kasan_set_track+0x25/0x30 [ 72.605203] kasan_save_free_info+0x2b/0x50 [ 72.605809] __kasan_slab_free+0x10a/0x190 [ 72.606422] kmem_cache_free+0x10d/0x4d0 [ 72.607004] rcu_core+0x8c8/0x2860 [ 72.607511] __do_softirq+0x1b7/0x7d4 [ 72.608068] [ 72.608317] Last potentially related work creation: [ 72.608984] kasan_save_stack+0x22/0x50 [ 72.609567] __kasan_record_aux_stack+0x8e/0xa0 [ 72.610231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.610967] remove_vma+0x139/0x170 [ 72.611484] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.612134] do_vmi_munmap+0x1f1/0x2b0 [ 72.612690] __vm_munmap+0x138/0x3a0 [ 72.613224] __x64_sys_munmap+0x59/0x80 [ 72.613802] do_syscall_64+0x3f/0x90 [ 72.614344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.615075] [ 72.615320] Second to last potentially related work creation: [ 72.616110] kasan_save_stack+0x22/0x50 [ 72.616685] __kasan_record_aux_stack+0x8e/0xa0 [ 72.617338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.618073] remove_vma+0x139/0x170 [ 72.618591] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.619229] do_vmi_munmap+0x1f1/0x2b0 [ 72.619786] __vm_munmap+0x138/0x3a0 [ 72.620340] __x64_sys_munmap+0x59/0x80 [ 72.620909] do_syscall_64+0x3f/0x90 [ 72.621458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.622197] [ 72.622443] The buggy address belongs to the object at ffff888015930658 [ 72.622443] which belongs to the cache vm_area_struct of size 168 [ 72.624142] The buggy address is located 88 bytes inside of [ 72.624142] freed 168-byte region [ffff888015930658, ffff888015930700) [ 72.625711] [ 72.625937] The buggy address belongs to the physical page: [ 72.626626] page:000000002d44fabf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15930 [ 72.627774] memcg:ffff888016db4901 [ 72.628250] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 72.628977] page_type: 0xffffffff() [ 72.629445] raw: 0100000000000200 ffff88800879fc80 ffffea0000569f80 dead000000000007 [ 72.630418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016db4901 [ 72.631380] page dumped because: kasan: bad access detected [ 72.632080] [ 72.632295] Memory state around the buggy address: [ 72.632874] ffff888015930580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.633744] ffff888015930600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 72.634612] >ffff888015930680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.635482] ^ [ 72.636093] ffff888015930700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 72.636957] ffff888015930780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 72.637825] ================================================================== [ 72.638945] Disabling lock debugging due to kernel taint [ 74.514408] BUG: Bad rss-counter state mm:0000000031e7c3dd type:MM_FILEPAGES val:33 [ 74.515590] BUG: Bad rss-counter state mm:0000000031e7c3dd type:MM_ANONPAGES val:22 [ 74.848263] BUG: Bad rss-counter state mm:00000000e08328bc type:MM_FILEPAGES val:33 [ 74.849296] BUG: Bad rss-counter state mm:00000000e08328bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45585' (ECDSA) to the list of known hosts. 2023/06/20 10:31:39 fuzzer started 2023/06/20 10:31:40 dialing manager at localhost:44161 2023/06/20 10:31:40 checking machine... 2023/06/20 10:31:40 checking revisions... [ 75.565487] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:31:40 testing simple program... [ 75.616667] cgroup: Unknown subsys name 'net' [ 75.655273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:31:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fed4e82c870 CR3=000000000dbca000 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=2039333a31333a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31333a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880198ef878 RCX=0000000000000001 RDX=1ffff1100331df10 RSI=ffff8880198efef0 RDI=ffff8880198ef880 RBP=ffff8880198efef0 RSP=ffff8880198ef7d0 R8 =0000000000000001 R9 =ffff8880198ef8b8 R10=0000000000038001 R11=000000000008a973 R12=0000000000000008 R13=ffff8880198ef8c0 R14=ffff8880198efef0 R15=ffff8880198ef878 RIP=ffffffff81130445 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 00007ff1f49ae900 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=00007ffe5efbd000 CR3=0000000017a8e000 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