syzkaller login: [ 34.662573] BUG: Bad rss-counter state mm:000000008ace008a type:MM_FILEPAGES val:33 [ 34.664050] BUG: Bad rss-counter state mm:000000008ace008a type:MM_ANONPAGES val:22 [ 34.805967] ================================================================== [ 34.806878] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.807807] Read of size 8 at addr ffff888015d84058 by task sshd/221 [ 34.808569] [ 34.808817] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.809758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.810729] Call Trace: [ 34.811043] [ 34.811453] dump_stack_lvl+0x91/0xf0 [ 34.812050] print_report+0xcc/0x620 [ 34.812641] ? __virt_addr_valid+0x102/0x340 [ 34.813327] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.814085] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.814835] kasan_report+0xbe/0xf0 [ 34.815408] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.816160] vma_interval_tree_remove+0xc75/0xec0 [ 34.816904] vma_prepare+0xc54/0x11a0 [ 34.817513] __split_vma+0x5af/0x950 [ 34.818089] ? __pfx___split_vma+0x10/0x10 [ 34.818735] ? find_held_lock+0x2c/0x110 [ 34.819362] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.820051] ? lock_is_held_type+0x9f/0x120 [ 34.820720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.821461] ? mtree_range_walk+0x632/0x900 [ 34.822008] ? mas_walk+0x5c7/0x7c0 [ 34.822478] do_vmi_munmap+0x1f1/0x2b0 [ 34.822963] mmap_region+0x1f9/0x2660 [ 34.823443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.823948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.824671] ? __pfx_lock_acquire+0x10/0x10 [ 34.825212] ? __pfx_mmap_region+0x10/0x10 [ 34.825734] ? security_mmap_addr+0x7d/0xa0 [ 34.826257] ? get_unmapped_area+0x1f5/0x3f0 [ 34.826809] do_mmap+0x854/0xf00 [ 34.827242] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.827734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.828293] ksys_mmap_pgoff+0x3af/0x500 [ 34.828803] do_syscall_64+0x3f/0x90 [ 34.829275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.829913] RIP: 0033:0x7fc8a030fd82 [ 34.830366] 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 [ 34.832474] RSP: 002b:00007ffd08318a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.833381] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8a030fd82 [ 34.834220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc89f749000 [ 34.835058] RBP: 00007fc89f749000 R08: 0000000000000009 R09: 0000000000001000 [ 34.835919] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563434676ec0 [ 34.836772] R13: 00007ffd08318ab0 R14: 00007ffd08318ae0 R15: 00007ffd08318e40 [ 34.837617] [ 34.837909] [ 34.838121] Allocated by task 214: [ 34.838544] kasan_save_stack+0x22/0x50 [ 34.839049] kasan_set_track+0x25/0x30 [ 34.839551] __kasan_slab_alloc+0x59/0x70 [ 34.840070] kmem_cache_alloc+0x16b/0x370 [ 34.840579] vm_area_dup+0x20/0x160 [ 34.841033] __split_vma+0x170/0x950 [ 34.841493] split_vma+0xc6/0x110 [ 34.841931] mprotect_fixup+0x8d2/0xb30 [ 34.842433] do_mprotect_pkey+0x87e/0xd40 [ 34.842955] __x64_sys_mprotect+0x78/0xc0 [ 34.843472] do_syscall_64+0x3f/0x90 [ 34.843945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.844586] [ 34.844819] Freed by task 214: [ 34.845208] kasan_save_stack+0x22/0x50 [ 34.845706] kasan_set_track+0x25/0x30 [ 34.846203] kasan_save_free_info+0x2b/0x50 [ 34.846727] __kasan_slab_free+0x10a/0x190 [ 34.847265] kmem_cache_free+0x10d/0x4d0 [ 34.847768] rcu_core+0x8c8/0x2860 [ 34.848208] __do_softirq+0x1b7/0x7d4 [ 34.848693] [ 34.848911] Last potentially related work creation: [ 34.849503] kasan_save_stack+0x22/0x50 [ 34.850004] __kasan_record_aux_stack+0x8e/0xa0 [ 34.850570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.851205] remove_vma+0x139/0x170 [ 34.851656] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.852208] do_vmi_munmap+0x1f1/0x2b0 [ 34.852699] __vm_munmap+0x138/0x3a0 [ 34.853167] __x64_sys_munmap+0x59/0x80 [ 34.853657] do_syscall_64+0x3f/0x90 [ 34.854123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.854760] [ 34.854974] The buggy address belongs to the object at ffff888015d84000 [ 34.854974] which belongs to the cache vm_area_struct of size 168 [ 34.856436] The buggy address is located 88 bytes inside of [ 34.856436] freed 168-byte region [ffff888015d84000, ffff888015d840a8) [ 34.857854] [ 34.858069] The buggy address belongs to the physical page: [ 34.858724] page:00000000620529ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d84 [ 34.859810] memcg:ffff88800e696601 [ 34.860236] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.860935] page_type: 0xffffffff() [ 34.861395] raw: 0100000000000200 ffff88800879fc80 ffffea0000353800 dead000000000003 [ 34.862323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e696601 [ 34.863230] page dumped because: kasan: bad access detected [ 34.863893] [ 34.864115] Memory state around the buggy address: [ 34.864712] ffff888015d83f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 34.865576] ffff888015d83f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.866431] >ffff888015d84000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.867283] ^ [ 34.868013] ffff888015d84080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.868887] ffff888015d84100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.869736] ================================================================== [ 34.870707] Disabling lock debugging due to kernel taint [ 36.990481] BUG: Bad rss-counter state mm:000000002131531f type:MM_FILEPAGES val:33 [ 36.991607] BUG: Bad rss-counter state mm:000000002131531f type:MM_ANONPAGES val:22 [ 37.595844] BUG: Bad rss-counter state mm:0000000068faf260 type:MM_FILEPAGES val:33 [ 37.597149] BUG: Bad rss-counter state mm:0000000068faf260 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26180' (ECDSA) to the list of known hosts. 2023/06/20 02:39:44 fuzzer started 2023/06/20 02:39:44 dialing manager at localhost:44161 2023/06/20 02:39:44 checking machine... 2023/06/20 02:39:44 checking revisions... [ 38.259058] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:39:45 testing simple program... [ 38.311085] cgroup: Unknown subsys name 'net' [ 38.379811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:39:39 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=00007f93173363f0 CR3=0000000015da0000 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=2034343a39333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b0c6a RDX=0000000000000008 RSI=ffff88800efdfe78 RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf099d8 R8 =ffffffff863b0c6e R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008a6be R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88800efdfe80 R15=ffff88806cf09a50 RIP=ffffffff811303f0 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 00007fa11cdf4900 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=00007ffff2bef000 CR3=0000000015e80000 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