syzkaller login: [ 73.890327] BUG: Bad rss-counter state mm:00000000d85cfa72 type:MM_FILEPAGES val:33 [ 73.891551] BUG: Bad rss-counter state mm:00000000d85cfa72 type:MM_ANONPAGES val:22 [ 73.967179] ================================================================== [ 73.968097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.969052] Read of size 8 at addr ffff888019642c20 by task sshd/221 [ 73.969819] [ 73.970116] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 73.971153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.972184] Call Trace: [ 73.972507] [ 73.972794] dump_stack_lvl+0x91/0xf0 [ 73.973287] print_report+0xcc/0x620 [ 73.973776] ? __virt_addr_valid+0x102/0x340 [ 73.974334] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.974961] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.975598] kasan_report+0xbe/0xf0 [ 73.976079] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.976702] vma_interval_tree_remove+0xc75/0xec0 [ 73.977305] vma_prepare+0xc54/0x11a0 [ 73.977784] __split_vma+0x5af/0x950 [ 73.978259] ? __pfx___split_vma+0x10/0x10 [ 73.978800] ? find_held_lock+0x2c/0x110 [ 73.979326] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.979893] ? lock_is_held_type+0x9f/0x120 [ 73.980434] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.981049] ? mtree_range_walk+0x632/0x900 [ 73.981602] ? mas_walk+0x5c7/0x7c0 [ 73.982087] do_vmi_munmap+0x1f1/0x2b0 [ 73.982580] mmap_region+0x1f9/0x2660 [ 73.983081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.983607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.984332] ? __pfx_lock_acquire+0x10/0x10 [ 73.984867] ? __pfx_mmap_region+0x10/0x10 [ 73.985409] ? security_mmap_addr+0x7d/0xa0 [ 73.985942] ? get_unmapped_area+0x1f5/0x3f0 [ 73.986503] do_mmap+0x854/0xf00 [ 73.986955] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.987463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.988030] ksys_mmap_pgoff+0x3af/0x500 [ 73.988541] do_syscall_64+0x3f/0x90 [ 73.989022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.989680] RIP: 0033:0x7f5a6b035d82 [ 73.990138] 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 [ 73.992293] RSP: 002b:00007ffef6451688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.993213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a6b035d82 [ 73.994066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a6a46f000 [ 73.994934] RBP: 00007f5a6a46f000 R08: 0000000000000009 R09: 0000000000001000 [ 73.995779] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614d571aec0 [ 73.996646] R13: 00007ffef64516a0 R14: 00007ffef64516d0 R15: 00007ffef6451a30 [ 73.997513] [ 73.997808] [ 73.998025] Allocated by task 214: [ 73.998457] kasan_save_stack+0x22/0x50 [ 73.998971] kasan_set_track+0x25/0x30 [ 73.999472] __kasan_slab_alloc+0x59/0x70 [ 73.999994] kmem_cache_alloc+0x16b/0x370 [ 74.000521] vm_area_dup+0x20/0x160 [ 74.000975] __split_vma+0x170/0x950 [ 74.001449] split_vma+0xc6/0x110 [ 74.001888] mprotect_fixup+0x8d2/0xb30 [ 74.002393] do_mprotect_pkey+0x87e/0xd40 [ 74.002936] __x64_sys_mprotect+0x78/0xc0 [ 74.003458] do_syscall_64+0x3f/0x90 [ 74.003936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.004587] [ 74.004801] Freed by task 214: [ 74.005193] kasan_save_stack+0x22/0x50 [ 74.005702] kasan_set_track+0x25/0x30 [ 74.006200] kasan_save_free_info+0x2b/0x50 [ 74.006735] __kasan_slab_free+0x10a/0x190 [ 74.007291] kmem_cache_free+0x10d/0x4d0 [ 74.007802] rcu_core+0x8c8/0x2860 [ 74.008248] __do_softirq+0x1b7/0x7d4 [ 74.008726] [ 74.008942] Last potentially related work creation: [ 74.009537] kasan_save_stack+0x22/0x50 [ 74.010040] __kasan_record_aux_stack+0x8e/0xa0 [ 74.010616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.011272] remove_vma+0x139/0x170 [ 74.011721] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.012290] do_vmi_munmap+0x1f1/0x2b0 [ 74.012774] __vm_munmap+0x138/0x3a0 [ 74.013246] __x64_sys_munmap+0x59/0x80 [ 74.013752] do_syscall_64+0x3f/0x90 [ 74.014230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.014900] [ 74.015117] The buggy address belongs to the object at ffff888019642bc8 [ 74.015117] which belongs to the cache vm_area_struct of size 168 [ 74.016595] The buggy address is located 88 bytes inside of [ 74.016595] freed 168-byte region [ffff888019642bc8, ffff888019642c70) [ 74.018006] [ 74.018226] The buggy address belongs to the physical page: [ 74.018909] page:00000000987ccda3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19642 [ 74.020009] memcg:ffff88800d0e4d01 [ 74.020437] flags: 0x100000000000200(slab|node=0|zone=1) [ 74.021081] page_type: 0xffffffff() [ 74.021541] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 74.022466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0e4d01 [ 74.023388] page dumped because: kasan: bad access detected [ 74.024058] [ 74.024280] Memory state around the buggy address: [ 74.024864] ffff888019642b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.025729] ffff888019642b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 74.026596] >ffff888019642c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 74.027468] ^ [ 74.027998] ffff888019642c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 74.028857] ffff888019642d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 74.029722] ================================================================== [ 74.030805] Disabling lock debugging due to kernel taint [ 75.846925] BUG: Bad rss-counter state mm:000000002096270a type:MM_FILEPAGES val:33 [ 75.847620] BUG: Bad rss-counter state mm:000000002096270a type:MM_ANONPAGES val:22 [ 76.273885] BUG: Bad rss-counter state mm:0000000006212903 type:MM_FILEPAGES val:33 [ 76.274494] BUG: Bad rss-counter state mm:0000000006212903 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50658' (ECDSA) to the list of known hosts. 2023/06/20 04:52:36 fuzzer started 2023/06/20 04:52:36 dialing manager at localhost:44161 2023/06/20 04:52:36 checking machine... 2023/06/20 04:52:36 checking revisions... [ 76.967382] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:52:37 testing simple program... [ 77.024579] cgroup: Unknown subsys name 'net' [ 77.062061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a78 RCX=ffffffff86137501 RDX=1ffff1100d9c135a RSI=0000000000000000 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a60 R8 =ffffffff86137542 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800caed1c0 R15=ffff88800ca95180 RIP=ffffffff8113038e 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 00007f8392d29900 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=00007f83932e0618 CR3=000000000e8e4000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801b1518c0 RCX=0000000000000000 RDX=ffff888009fb51c0 RSI=ffff88801b1518c0 RDI=ffff888009db79c8 RBP=ffff888009db79c8 RSP=ffff888009db7950 R8 =0000000000000000 R9 =0000000000000000 R10=000000000000000c R11=0000000000000128 R12=ffff88801b1518c2 R13=dffffc0000000000 R14=0000000000000000 R15=000000000000000c RIP=ffffffff844f02d2 RFL=00000093 [--S-A-C] 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 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=00007ffc2ec8d000 CR3=0000000005482000 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=00007fb26c92151000005648519f2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000