syzkaller login: [ 41.926321] BUG: Bad rss-counter state mm:00000000b097e3f0 type:MM_FILEPAGES val:33 [ 41.927349] BUG: Bad rss-counter state mm:00000000b097e3f0 type:MM_ANONPAGES val:22 [ 42.086809] ================================================================== [ 42.087721] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.088681] Read of size 8 at addr ffff88800dec2c20 by task sshd/221 [ 42.089472] [ 42.089850] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.090716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.091707] Call Trace: [ 42.092050] [ 42.092336] dump_stack_lvl+0x91/0xf0 [ 42.092858] print_report+0xcc/0x620 [ 42.093351] ? __virt_addr_valid+0x102/0x340 [ 42.093907] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.094523] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.095149] kasan_report+0xbe/0xf0 [ 42.095627] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.096241] vma_interval_tree_remove+0xc75/0xec0 [ 42.096862] vma_prepare+0xc54/0x11a0 [ 42.097340] __split_vma+0x5af/0x950 [ 42.097812] ? __pfx___split_vma+0x10/0x10 [ 42.098351] ? find_held_lock+0x2c/0x110 [ 42.098880] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.099462] ? lock_is_held_type+0x9f/0x120 [ 42.100012] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.100639] ? mtree_range_walk+0x632/0x900 [ 42.101206] ? mas_walk+0x5c7/0x7c0 [ 42.101685] do_vmi_munmap+0x1f1/0x2b0 [ 42.102194] mmap_region+0x1f9/0x2660 [ 42.102679] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.103202] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.103921] ? __pfx_lock_acquire+0x10/0x10 [ 42.104475] ? __pfx_mmap_region+0x10/0x10 [ 42.105020] ? security_mmap_addr+0x7d/0xa0 [ 42.105556] ? get_unmapped_area+0x1f5/0x3f0 [ 42.106113] do_mmap+0x854/0xf00 [ 42.106552] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.107050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.107623] ksys_mmap_pgoff+0x3af/0x500 [ 42.108132] do_syscall_64+0x3f/0x90 [ 42.108632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.109282] RIP: 0033:0x7f85c8014d82 [ 42.109742] 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 [ 42.111875] RSP: 002b:00007ffde906d2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.112799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85c8014d82 [ 42.113657] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85c744e000 [ 42.114507] RBP: 00007f85c744e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.115362] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a962fb1f70 [ 42.116222] R13: 00007ffde906d310 R14: 00007ffde906d340 R15: 00007ffde906d6a0 [ 42.117111] [ 42.117403] [ 42.117621] Allocated by task 214: [ 42.118061] kasan_save_stack+0x22/0x50 [ 42.118566] kasan_set_track+0x25/0x30 [ 42.119065] __kasan_slab_alloc+0x59/0x70 [ 42.119594] kmem_cache_alloc+0x16b/0x370 [ 42.120111] vm_area_dup+0x20/0x160 [ 42.120575] __split_vma+0x170/0x950 [ 42.121040] split_vma+0xc6/0x110 [ 42.121478] mprotect_fixup+0x8d2/0xb30 [ 42.121990] do_mprotect_pkey+0x87e/0xd40 [ 42.122514] __x64_sys_mprotect+0x78/0xc0 [ 42.123035] do_syscall_64+0x3f/0x90 [ 42.123507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.124158] [ 42.124374] Freed by task 19: [ 42.124772] kasan_save_stack+0x22/0x50 [ 42.125271] kasan_set_track+0x25/0x30 [ 42.125772] kasan_save_free_info+0x2b/0x50 [ 42.126313] __kasan_slab_free+0x10a/0x190 [ 42.126852] kmem_cache_free+0x10d/0x4d0 [ 42.127359] rcu_core+0x8c8/0x2860 [ 42.127808] __do_softirq+0x1b7/0x7d4 [ 42.128280] [ 42.128510] Last potentially related work creation: [ 42.129093] kasan_save_stack+0x22/0x50 [ 42.129607] __kasan_record_aux_stack+0x8e/0xa0 [ 42.130179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.130817] remove_vma+0x139/0x170 [ 42.131308] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.131866] do_vmi_munmap+0x1f1/0x2b0 [ 42.132361] __vm_munmap+0x138/0x3a0 [ 42.132842] __x64_sys_munmap+0x59/0x80 [ 42.133345] do_syscall_64+0x3f/0x90 [ 42.133818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.134467] [ 42.134685] The buggy address belongs to the object at ffff88800dec2bc8 [ 42.134685] which belongs to the cache vm_area_struct of size 168 [ 42.136153] The buggy address is located 88 bytes inside of [ 42.136153] freed 168-byte region [ffff88800dec2bc8, ffff88800dec2c70) [ 42.137567] [ 42.137787] The buggy address belongs to the physical page: [ 42.138445] page:00000000e53b6748 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdec2 [ 42.139527] memcg:ffff88800ef13e01 [ 42.139959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.140671] page_type: 0xffffffff() [ 42.141131] raw: 0100000000000200 ffff88800879fc80 ffffea0000363e00 dead000000000005 [ 42.142046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef13e01 [ 42.142961] page dumped because: kasan: bad access detected [ 42.143627] [ 42.143845] Memory state around the buggy address: [ 42.144420] ffff88800dec2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.145304] ffff88800dec2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.146166] >ffff88800dec2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.147017] ^ [ 42.147551] ffff88800dec2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 42.148419] ffff88800dec2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 42.149285] ================================================================== [ 42.150203] Disabling lock debugging due to kernel taint [ 44.141757] BUG: Bad rss-counter state mm:0000000092f381bf type:MM_FILEPAGES val:33 [ 44.142737] BUG: Bad rss-counter state mm:0000000092f381bf type:MM_ANONPAGES val:22 [ 44.563580] BUG: Bad rss-counter state mm:00000000d35bd78f type:MM_FILEPAGES val:33 [ 44.564605] BUG: Bad rss-counter state mm:00000000d35bd78f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18897' (ECDSA) to the list of known hosts. 2023/06/19 18:51:15 fuzzer started 2023/06/19 18:51:15 dialing manager at localhost:44161 2023/06/19 18:51:15 checking machine... 2023/06/19 18:51:15 checking revisions... [ 45.338609] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:51:15 testing simple program... [ 45.397495] cgroup: Unknown subsys name 'net' [ 45.456099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652988 RCX=0000000000000000 RDX=ffff888016709b40 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801cd979c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff8880097445f0 RIP=ffffffff814c84e2 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 00007fce7771c900 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=00007ffddde6d000 CR3=0000000016d1c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f5e61494820 CR3=000000000f214000 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=de77f05b3a74b18c904aed1bf546436d XMM02=2c67c8bc2e329bc3000000000011de28 XMM03=fb795ef6d65770560000000000124030 XMM04=03dbbb3ec441939300000000000ae988 XMM05=e4cb8bb95a7664b60000000000133858 XMM06=40b0c093c10ad6030000000000132a30 XMM07=e042d86d42eb936e00000000001242b0 XMM08=ab970b0a140e390f000000000011de88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000