syzkaller login: [ 38.605351] BUG: Bad rss-counter state mm:000000003357258b type:MM_FILEPAGES val:33 [ 38.606100] BUG: Bad rss-counter state mm:000000003357258b type:MM_ANONPAGES val:22 [ 38.749059] ================================================================== [ 38.749845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.750645] Read of size 8 at addr ffff888016adcdf0 by task sshd/227 [ 38.751297] [ 38.751479] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.752322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.753149] Call Trace: [ 38.753419] [ 38.753671] dump_stack_lvl+0x91/0xf0 [ 38.754091] print_report+0xcc/0x620 [ 38.754521] ? __virt_addr_valid+0x102/0x340 [ 38.754992] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.755509] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.756032] kasan_report+0xbe/0xf0 [ 38.756435] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.756967] vma_interval_tree_remove+0xc75/0xec0 [ 38.757482] vma_prepare+0xc54/0x11a0 [ 38.757890] __split_vma+0x5af/0x950 [ 38.758289] ? __pfx___split_vma+0x10/0x10 [ 38.758736] ? find_held_lock+0x2c/0x110 [ 38.759179] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.759655] ? lock_is_held_type+0x9f/0x120 [ 38.760113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.760638] ? mtree_range_walk+0x632/0x900 [ 38.761106] ? mas_walk+0x5c7/0x7c0 [ 38.761527] do_vmi_munmap+0x1f1/0x2b0 [ 38.761948] mmap_region+0x1f9/0x2660 [ 38.762356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.762787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.763395] ? __pfx_lock_acquire+0x10/0x10 [ 38.763852] ? __pfx_mmap_region+0x10/0x10 [ 38.764299] ? security_mmap_addr+0x7d/0xa0 [ 38.764752] ? get_unmapped_area+0x1f5/0x3f0 [ 38.765222] do_mmap+0x854/0xf00 [ 38.765610] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.766031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.766504] ksys_mmap_pgoff+0x3af/0x500 [ 38.766935] do_syscall_64+0x3f/0x90 [ 38.767337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.767879] RIP: 0033:0x7f2a22b20d82 [ 38.768264] 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 [ 38.770069] RSP: 002b:00007fff236fe318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.770831] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a22b20d82 [ 38.771544] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a21f5a000 [ 38.772255] RBP: 00007f2a21f5a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.772966] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac1d940ec0 [ 38.773690] R13: 00007fff236fe330 R14: 00007fff236fe360 R15: 00007fff236fe6c0 [ 38.774403] [ 38.774651] [ 38.774830] Allocated by task 220: [ 38.775185] kasan_save_stack+0x22/0x50 [ 38.775606] kasan_set_track+0x25/0x30 [ 38.776020] __kasan_slab_alloc+0x59/0x70 [ 38.776457] kmem_cache_alloc+0x16b/0x370 [ 38.776885] vm_area_dup+0x20/0x160 [ 38.777272] __split_vma+0x170/0x950 [ 38.777673] split_vma+0xc6/0x110 [ 38.778039] mprotect_fixup+0x8d2/0xb30 [ 38.778457] do_mprotect_pkey+0x87e/0xd40 [ 38.778891] __x64_sys_mprotect+0x78/0xc0 [ 38.779325] do_syscall_64+0x3f/0x90 [ 38.779719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.780257] [ 38.780436] Freed by task 204: [ 38.780766] kasan_save_stack+0x22/0x50 [ 38.781188] kasan_set_track+0x25/0x30 [ 38.781622] kasan_save_free_info+0x2b/0x50 [ 38.782064] __kasan_slab_free+0x10a/0x190 [ 38.782513] kmem_cache_free+0x10d/0x4d0 [ 38.782947] rcu_core+0x8c8/0x2860 [ 38.783320] __do_softirq+0x1b7/0x7d4 [ 38.783719] [ 38.783904] Last potentially related work creation: [ 38.784392] kasan_save_stack+0x22/0x50 [ 38.784813] __kasan_record_aux_stack+0x8e/0xa0 [ 38.785300] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.785848] remove_vma+0x139/0x170 [ 38.786224] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.786695] do_vmi_munmap+0x1f1/0x2b0 [ 38.787102] __vm_munmap+0x138/0x3a0 [ 38.787492] __x64_sys_munmap+0x59/0x80 [ 38.787906] do_syscall_64+0x3f/0x90 [ 38.788305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.788844] [ 38.789023] The buggy address belongs to the object at ffff888016adcd98 [ 38.789023] which belongs to the cache vm_area_struct of size 168 [ 38.790263] The buggy address is located 88 bytes inside of [ 38.790263] freed 168-byte region [ffff888016adcd98, ffff888016adce40) [ 38.791444] [ 38.791624] The buggy address belongs to the physical page: [ 38.792185] page:00000000086cea43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16adc [ 38.793105] memcg:ffff88801688b301 [ 38.793478] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.794022] page_type: 0xffffffff() [ 38.794415] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.795185] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801688b301 [ 38.795937] page dumped because: kasan: bad access detected [ 38.796502] [ 38.796683] Memory state around the buggy address: [ 38.797169] ffff888016adcc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.797906] ffff888016adcd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.798638] >ffff888016adcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.799368] ^ [ 38.800061] ffff888016adce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.800784] ffff888016adce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.801517] ================================================================== [ 38.802446] Disabling lock debugging due to kernel taint [ 40.245583] BUG: Bad rss-counter state mm:00000000b52b8686 type:MM_FILEPAGES val:33 [ 40.246160] BUG: Bad rss-counter state mm:00000000b52b8686 type:MM_ANONPAGES val:22 [ 40.733859] BUG: Bad rss-counter state mm:00000000e344205f type:MM_FILEPAGES val:33 [ 40.735030] BUG: Bad rss-counter state mm:00000000e344205f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46447' (ECDSA) to the list of known hosts. 2023/06/19 12:58:05 fuzzer started 2023/06/19 12:58:06 dialing manager at localhost:44161 2023/06/19 12:58:06 checking machine... 2023/06/19 12:58:06 checking revisions... [ 41.483816] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:58:06 testing simple program... [ 41.525234] cgroup: Unknown subsys name 'net' [ 41.588108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:57:57 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=00007f737a618ee0 CR3=000000000c5c4000 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=ac0ace2f6bd593b4a842cf24410f15be XMM02=ec2efd57dc4c00df000000000011d710 XMM03=4cab68f7ab5f9d40000000000011d7e0 XMM04=0a355621533007b900000000000ae988 XMM05=1fc4551c688da41a00000000001358b8 XMM06=e8008b1642ea3e6000000000001346a8 XMM07=fb795ef6d65770560000000000124cb0 XMM08=2c67c8bc2e329bc3000000000011d780 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001d3424c RBX=ffff88800e9a1260 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed1001d3424e RBP=0000000000000010 RSP=ffff8880166d7c18 R8 =ffff88800e9a1260 R9 =0000000000000004 R10=ffffed1001d3424c R11=00000000000b6996 R12=ffff88800e9a1260 R13=0000000000000dc0 R14=0000000000000001 R15=0000000000000dc0 RIP=ffffffff8450d45d 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 00007fc28c142900 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=00007fc28c6fa0b0 CR3=000000000e620000 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=2035303a38353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000