syzkaller login: [ 60.646401] BUG: Bad rss-counter state mm:000000009116a7ff type:MM_FILEPAGES val:33 [ 60.647800] BUG: Bad rss-counter state mm:000000009116a7ff type:MM_ANONPAGES val:22 [ 60.812867] ================================================================== [ 60.813873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.814884] Read of size 8 at addr ffff88801ac25d08 by task sshd/226 [ 60.815821] [ 60.816055] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.816976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.818051] Call Trace: [ 60.818389] [ 60.818691] dump_stack_lvl+0x91/0xf0 [ 60.819217] print_report+0xcc/0x620 [ 60.819731] ? __virt_addr_valid+0x102/0x340 [ 60.820312] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.820996] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.821644] kasan_report+0xbe/0xf0 [ 60.822155] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.822822] vma_interval_tree_remove+0xc75/0xec0 [ 60.823467] vma_prepare+0xc54/0x11a0 [ 60.824027] __split_vma+0x5af/0x950 [ 60.824545] ? __pfx___split_vma+0x10/0x10 [ 60.825138] ? find_held_lock+0x2c/0x110 [ 60.825714] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.826335] ? lock_is_held_type+0x9f/0x120 [ 60.826938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.827597] ? mtree_range_walk+0x632/0x900 [ 60.828194] ? mas_walk+0x5c7/0x7c0 [ 60.828723] do_vmi_munmap+0x1f1/0x2b0 [ 60.829263] mmap_region+0x1f9/0x2660 [ 60.829794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.830354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.831141] ? __pfx_lock_acquire+0x10/0x10 [ 60.831729] ? __pfx_mmap_region+0x10/0x10 [ 60.832309] ? security_mmap_addr+0x7d/0xa0 [ 60.832908] ? get_unmapped_area+0x1f5/0x3f0 [ 60.833510] do_mmap+0x854/0xf00 [ 60.833991] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.834534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.835152] ksys_mmap_pgoff+0x3af/0x500 [ 60.835708] do_syscall_64+0x3f/0x90 [ 60.836229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.836957] RIP: 0033:0x7fcd91991d82 [ 60.837456] 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 [ 60.839786] RSP: 002b:00007ffca2652bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.840759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd91991d82 [ 60.841664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd90dcb000 [ 60.842557] RBP: 00007fcd90dcb000 R08: 0000000000000009 R09: 0000000000001000 [ 60.843456] R10: 0000000000000812 R11: 0000000000000206 R12: 000055877985dec0 [ 60.844387] R13: 00007ffca2652bd0 R14: 00007ffca2652c00 R15: 00007ffca2652f60 [ 60.845311] [ 60.845622] [ 60.845849] Allocated by task 219: [ 60.846299] kasan_save_stack+0x22/0x50 [ 60.846836] kasan_set_track+0x25/0x30 [ 60.847366] __kasan_slab_alloc+0x59/0x70 [ 60.847926] kmem_cache_alloc+0x16b/0x370 [ 60.848481] vm_area_dup+0x20/0x160 [ 60.848983] __split_vma+0x170/0x950 [ 60.849495] split_vma+0xc6/0x110 [ 60.849979] mprotect_fixup+0x8d2/0xb30 [ 60.850527] do_mprotect_pkey+0x87e/0xd40 [ 60.851097] __x64_sys_mprotect+0x78/0xc0 [ 60.851668] do_syscall_64+0x3f/0x90 [ 60.852187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.852900] [ 60.853134] Freed by task 203: [ 60.853558] kasan_save_stack+0x22/0x50 [ 60.854117] kasan_set_track+0x25/0x30 [ 60.854661] kasan_save_free_info+0x2b/0x50 [ 60.855249] __kasan_slab_free+0x10a/0x190 [ 60.855830] kmem_cache_free+0x10d/0x4d0 [ 60.856387] rcu_core+0x8c8/0x2860 [ 60.856897] __do_softirq+0x1b7/0x7d4 [ 60.857420] [ 60.857714] Last potentially related work creation: [ 60.858357] kasan_save_stack+0x22/0x50 [ 60.858912] __kasan_record_aux_stack+0x8e/0xa0 [ 60.859539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.860249] remove_vma+0x139/0x170 [ 60.860747] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.861359] do_vmi_munmap+0x1f1/0x2b0 [ 60.861887] __vm_munmap+0x138/0x3a0 [ 60.862397] __x64_sys_munmap+0x59/0x80 [ 60.862936] do_syscall_64+0x3f/0x90 [ 60.863456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.864198] [ 60.864431] The buggy address belongs to the object at ffff88801ac25cb0 [ 60.864431] which belongs to the cache vm_area_struct of size 168 [ 60.866051] The buggy address is located 88 bytes inside of [ 60.866051] freed 168-byte region [ffff88801ac25cb0, ffff88801ac25d58) [ 60.867596] [ 60.867827] The buggy address belongs to the physical page: [ 60.868556] page:00000000d3678292 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac25 [ 60.869753] memcg:ffff88801ac0e601 [ 60.870219] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.870930] page_type: 0xffffffff() [ 60.871423] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.872423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ac0e601 [ 60.873413] page dumped because: kasan: bad access detected [ 60.874137] [ 60.874368] Memory state around the buggy address: [ 60.875007] ffff88801ac25c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 60.875942] ffff88801ac25c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.876894] >ffff88801ac25d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.877832] ^ [ 60.878311] ffff88801ac25d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.879244] ffff88801ac25e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.880167] ================================================================== [ 60.881225] Disabling lock debugging due to kernel taint [ 62.311474] BUG: Bad rss-counter state mm:000000005db0d320 type:MM_FILEPAGES val:33 [ 62.312235] BUG: Bad rss-counter state mm:000000005db0d320 type:MM_ANONPAGES val:22 [ 62.707679] BUG: Bad rss-counter state mm:00000000b9d2cc24 type:MM_FILEPAGES val:33 [ 62.709380] BUG: Bad rss-counter state mm:00000000b9d2cc24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17320' (ECDSA) to the list of known hosts. 2023/06/20 11:33:36 fuzzer started 2023/06/20 11:33:36 dialing manager at localhost:36067 2023/06/20 11:33:36 checking machine... 2023/06/20 11:33:36 checking revisions... [ 63.463075] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:33:37 testing simple program... [ 63.501751] cgroup: Unknown subsys name 'net' [ 63.547333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:33:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ff0c212b998 CR3=000000000cbaa000 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=2036333a33333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002ce0f59 RSI=ffff888016707de0 RDI=ffff888016707ad0 RBP=0000000000000010 RSP=ffff888016707a10 R8 =0000000000000001 R9 =ffff888016707ac0 R10=0000000000038001 R11=00000000000247f6 R12=ffff888016707ae0 R13=ffff888016707ac8 R14=ffff888016707de0 R15=ffff888016707a80 RIP=ffffffff81131c60 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 00007efe74087900 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=00007fffb2bf1000 CR3=000000000e9f4000 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