syzkaller login: [ 37.903087] BUG: Bad rss-counter state mm:0000000030f230c2 type:MM_FILEPAGES val:33 [ 37.903762] BUG: Bad rss-counter state mm:0000000030f230c2 type:MM_ANONPAGES val:22 [ 38.034237] ================================================================== [ 38.034920] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.035814] Read of size 8 at addr ffff88800e49e6b0 by task sshd/220 [ 38.036397] [ 38.036593] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.037248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.038008] Call Trace: [ 38.038249] [ 38.038463] dump_stack_lvl+0x91/0xf0 [ 38.038837] print_report+0xcc/0x620 [ 38.039207] ? __virt_addr_valid+0x102/0x340 [ 38.039628] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.040095] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.040598] kasan_report+0xbe/0xf0 [ 38.040958] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.041427] vma_interval_tree_remove+0xc75/0xec0 [ 38.041884] vma_prepare+0xc54/0x11a0 [ 38.042247] __split_vma+0x5af/0x950 [ 38.042600] ? __pfx___split_vma+0x10/0x10 [ 38.043000] ? find_held_lock+0x2c/0x110 [ 38.043394] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.043821] ? lock_is_held_type+0x9f/0x120 [ 38.044228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.044697] ? mtree_range_walk+0x632/0x900 [ 38.045113] ? mas_walk+0x5c7/0x7c0 [ 38.045471] do_vmi_munmap+0x1f1/0x2b0 [ 38.045844] mmap_region+0x1f9/0x2660 [ 38.046211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.046596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.047136] ? __pfx_lock_acquire+0x10/0x10 [ 38.047539] ? __pfx_mmap_region+0x10/0x10 [ 38.047942] ? security_mmap_addr+0x7d/0xa0 [ 38.048341] ? get_unmapped_area+0x1f5/0x3f0 [ 38.048765] do_mmap+0x854/0xf00 [ 38.049099] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.049474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.049897] ksys_mmap_pgoff+0x3af/0x500 [ 38.050280] do_syscall_64+0x3f/0x90 [ 38.050641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.051142] RIP: 0033:0x7f77239d8d82 [ 38.051484] 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 [ 38.053102] RSP: 002b:00007fffedee2598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.053784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77239d8d82 [ 38.054421] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7722e12000 [ 38.055062] RBP: 00007f7722e12000 R08: 0000000000000009 R09: 0000000000001000 [ 38.055708] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d65447ec0 [ 38.056347] R13: 00007fffedee25b0 R14: 00007fffedee25e0 R15: 00007fffedee2940 [ 38.057006] [ 38.057228] [ 38.057390] Allocated by task 213: [ 38.057714] kasan_save_stack+0x22/0x50 [ 38.058096] kasan_set_track+0x25/0x30 [ 38.058478] __kasan_slab_alloc+0x59/0x70 [ 38.058874] kmem_cache_alloc+0x16b/0x370 [ 38.059264] vm_area_dup+0x20/0x160 [ 38.059610] __split_vma+0x170/0x950 [ 38.059963] split_vma+0xc6/0x110 [ 38.060295] mprotect_fixup+0x8d2/0xb30 [ 38.060692] do_mprotect_pkey+0x87e/0xd40 [ 38.061085] __x64_sys_mprotect+0x78/0xc0 [ 38.061477] do_syscall_64+0x3f/0x90 [ 38.061833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.062317] [ 38.062479] Freed by task 213: [ 38.062776] kasan_save_stack+0x22/0x50 [ 38.063157] kasan_set_track+0x25/0x30 [ 38.063534] kasan_save_free_info+0x2b/0x50 [ 38.063940] __kasan_slab_free+0x10a/0x190 [ 38.064341] kmem_cache_free+0x10d/0x4d0 [ 38.064732] rcu_core+0x8c8/0x2860 [ 38.065067] __do_softirq+0x1b7/0x7d4 [ 38.065428] [ 38.065591] Last potentially related work creation: [ 38.066035] kasan_save_stack+0x22/0x50 [ 38.066415] __kasan_record_aux_stack+0x8e/0xa0 [ 38.066848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.067333] remove_vma+0x139/0x170 [ 38.067674] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.068094] do_vmi_munmap+0x1f1/0x2b0 [ 38.068469] __vm_munmap+0x138/0x3a0 [ 38.068846] __x64_sys_munmap+0x59/0x80 [ 38.069224] do_syscall_64+0x3f/0x90 [ 38.069584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.070073] [ 38.070238] The buggy address belongs to the object at ffff88800e49e658 [ 38.070238] which belongs to the cache vm_area_struct of size 168 [ 38.071354] The buggy address is located 88 bytes inside of [ 38.071354] freed 168-byte region [ffff88800e49e658, ffff88800e49e700) [ 38.072414] [ 38.072586] The buggy address belongs to the physical page: [ 38.073087] page:00000000f6574a03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe49e [ 38.073919] memcg:ffff888008dbf801 [ 38.074244] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.074732] page_type: 0xffffffff() [ 38.075075] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.075771] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008dbf801 [ 38.076568] page dumped because: kasan: bad access detected [ 38.077076] [ 38.077241] Memory state around the buggy address: [ 38.077684] ffff88800e49e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.078330] ffff88800e49e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.078981] >ffff88800e49e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.079632] ^ [ 38.080078] ffff88800e49e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.080737] ffff88800e49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.081381] ================================================================== [ 38.082101] Disabling lock debugging due to kernel taint [ 40.666201] BUG: Bad rss-counter state mm:00000000a452b04c type:MM_FILEPAGES val:33 [ 40.666925] BUG: Bad rss-counter state mm:00000000a452b04c type:MM_ANONPAGES val:22 [ 41.100133] BUG: Bad rss-counter state mm:0000000064c00d1d type:MM_FILEPAGES val:33 [ 41.100873] BUG: Bad rss-counter state mm:0000000064c00d1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33049' (ECDSA) to the list of known hosts. 2023/06/20 03:22:04 fuzzer started 2023/06/20 03:22:04 dialing manager at localhost:44161 2023/06/20 03:22:04 checking machine... 2023/06/20 03:22:04 checking revisions... [ 41.828580] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:22:04 testing simple program... [ 41.876317] cgroup: Unknown subsys name 'net' [ 41.924548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:56 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=00007f48b79987f0 CR3=000000000fe5e000 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=2033303a32323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32323a3330203032 XMM08=00007f95e80162700000007700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff811fc87d RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff811fc87d RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000979d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888014343680 R15=ffff88801a31da10 RIP=ffffffff813ad424 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 00007f4525d3a900 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=00007f45262f1618 CR3=000000000b8ac000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000