syzkaller login: [ 36.970322] BUG: Bad rss-counter state mm:000000009c236fb4 type:MM_FILEPAGES val:33 [ 36.971530] BUG: Bad rss-counter state mm:000000009c236fb4 type:MM_ANONPAGES val:22 [ 37.008018] ================================================================== [ 37.009084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.010170] Read of size 8 at addr ffff88800e0214e0 by task sshd/219 [ 37.011008] [ 37.011328] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.012265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.013361] Call Trace: [ 37.013728] [ 37.014054] dump_stack_lvl+0x91/0xf0 [ 37.014592] print_report+0xcc/0x620 [ 37.015131] ? __virt_addr_valid+0x102/0x340 [ 37.015760] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.016422] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.017192] kasan_report+0xbe/0xf0 [ 37.017682] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.018315] vma_interval_tree_remove+0xc75/0xec0 [ 37.018921] vma_prepare+0xc54/0x11a0 [ 37.019404] __split_vma+0x5af/0x950 [ 37.019878] ? __pfx___split_vma+0x10/0x10 [ 37.020418] ? find_held_lock+0x2c/0x110 [ 37.020956] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.021540] ? lock_is_held_type+0x9f/0x120 [ 37.022081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.022702] ? mtree_range_walk+0x632/0x900 [ 37.023256] ? mas_walk+0x5c7/0x7c0 [ 37.023740] do_vmi_munmap+0x1f1/0x2b0 [ 37.024235] mmap_region+0x1f9/0x2660 [ 37.024732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.025261] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.025977] ? __pfx_lock_acquire+0x10/0x10 [ 37.026513] ? __pfx_mmap_region+0x10/0x10 [ 37.027044] ? security_mmap_addr+0x7d/0xa0 [ 37.027580] ? get_unmapped_area+0x1f5/0x3f0 [ 37.028136] do_mmap+0x854/0xf00 [ 37.028583] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.029091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.029659] ksys_mmap_pgoff+0x3af/0x500 [ 37.030168] do_syscall_64+0x3f/0x90 [ 37.030654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.031303] RIP: 0033:0x7fdd90d10d82 [ 37.031761] 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 [ 37.033897] RSP: 002b:00007ffd3f08ecd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.034826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd90d10d82 [ 37.035702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd9014a000 [ 37.036584] RBP: 00007fdd9014a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.037468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc5beebf70 [ 37.038331] R13: 00007ffd3f08ecf0 R14: 00007ffd3f08ed20 R15: 00007ffd3f08f080 [ 37.039207] [ 37.039499] [ 37.039716] Allocated by task 212: [ 37.040156] kasan_save_stack+0x22/0x50 [ 37.040664] kasan_set_track+0x25/0x30 [ 37.041168] __kasan_slab_alloc+0x59/0x70 [ 37.041708] kmem_cache_alloc+0x16b/0x370 [ 37.042234] vm_area_dup+0x20/0x160 [ 37.042697] __split_vma+0x170/0x950 [ 37.043172] split_vma+0xc6/0x110 [ 37.043614] mprotect_fixup+0x8d2/0xb30 [ 37.044113] do_mprotect_pkey+0x87e/0xd40 [ 37.044636] __x64_sys_mprotect+0x78/0xc0 [ 37.045170] do_syscall_64+0x3f/0x90 [ 37.045646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.046296] [ 37.046512] Freed by task 19: [ 37.046897] kasan_save_stack+0x22/0x50 [ 37.047401] kasan_set_track+0x25/0x30 [ 37.047893] kasan_save_free_info+0x2b/0x50 [ 37.048425] __kasan_slab_free+0x10a/0x190 [ 37.048974] kmem_cache_free+0x10d/0x4d0 [ 37.049485] rcu_core+0x8c8/0x2860 [ 37.049927] __do_softirq+0x1b7/0x7d4 [ 37.050401] [ 37.050622] Last potentially related work creation: [ 37.051203] kasan_save_stack+0x22/0x50 [ 37.051709] __kasan_record_aux_stack+0x8e/0xa0 [ 37.052280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.052924] remove_vma+0x139/0x170 [ 37.053431] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.053989] do_vmi_munmap+0x1f1/0x2b0 [ 37.054475] __vm_munmap+0x138/0x3a0 [ 37.054941] __x64_sys_munmap+0x59/0x80 [ 37.055435] do_syscall_64+0x3f/0x90 [ 37.055906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.056556] [ 37.056773] The buggy address belongs to the object at ffff88800e021488 [ 37.056773] which belongs to the cache vm_area_struct of size 168 [ 37.058253] The buggy address is located 88 bytes inside of [ 37.058253] freed 168-byte region [ffff88800e021488, ffff88800e021530) [ 37.059685] [ 37.059897] The buggy address belongs to the physical page: [ 37.060556] page:00000000a5e2a695 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe021 [ 37.061665] memcg:ffff888016d90101 [ 37.062099] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.062746] page_type: 0xffffffff() [ 37.063199] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.064131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d90101 [ 37.065051] page dumped because: kasan: bad access detected [ 37.065716] [ 37.065934] Memory state around the buggy address: [ 37.066518] ffff88800e021380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.067395] ffff88800e021400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 37.068264] >ffff88800e021480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.069154] ^ [ 37.069912] ffff88800e021500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 37.070765] ffff88800e021580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.071631] ================================================================== [ 37.072630] Disabling lock debugging due to kernel taint [ 39.297601] BUG: Bad rss-counter state mm:00000000ad5f50f3 type:MM_FILEPAGES val:33 [ 39.298680] BUG: Bad rss-counter state mm:00000000ad5f50f3 type:MM_ANONPAGES val:22 [ 39.780814] BUG: Bad rss-counter state mm:00000000eb08a716 type:MM_FILEPAGES val:33 [ 39.781876] BUG: Bad rss-counter state mm:00000000eb08a716 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31581' (ECDSA) to the list of known hosts. 2023/06/19 17:54:04 fuzzer started 2023/06/19 17:54:04 dialing manager at localhost:44161 2023/06/19 17:54:04 checking machine... 2023/06/19 17:54:04 checking revisions... [ 40.505446] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:54:04 testing simple program... [ 40.558322] cgroup: Unknown subsys name 'net' [ 40.623509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800689fa70 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88800689f9d8 RBP=ffff8880068a0000 RSP=ffff88800689f980 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88800689f9d8 R11=00000000000b6cb2 R12=0000000000000000 R13=ffff88800689fa00 R14=ffff8880068a0000 R15=ffff88800689f9d8 RIP=ffffffff8450d412 RFL=00000247 [---Z-PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0f4a3de900 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=00007f0f49864a50 CR3=0000000013b9a000 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=000000000010f9b02fccd54c36d8a3f3 XMM01=fb9af9efe088bab07a406b0e89805465 XMM02=000000000011e6c0eff9b2d0a8fce9cb XMM03=000000000011e7902c67c8bc2e329bc3 XMM04=dcd029d1f55cfb9c00000000000ae988 XMM05=dfcdbad4f1609c370000000000134d00 XMM06=c80d548b1ad5e14c0000000000133b68 XMM07=e042d86d42eb936e00000000001253e0 XMM08=dc631b8513d3d38f000000000011e790 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800ff84000 RBX=ffff88800e3939e8 RCX=1ffff1100281351e RDX=dffffc0000000000 RSI=ffff88800ff7a000 RDI=ffff88800e393a18 RBP=ffff88801409a8c0 RSP=ffff888016b57638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800ff78000 R13=0000000000000000 R14=ffff888019fe3898 R15=ffff888019fe3850 RIP=ffffffff81847508 RFL=00000046 [---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 00007fccb32cf900 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=00007fff84935000 CR3=0000000015f5c000 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