syzkaller login: [ 235.521337] BUG: Bad rss-counter state mm:00000000619f0ec3 type:MM_FILEPAGES val:33 [ 235.522790] BUG: Bad rss-counter state mm:00000000619f0ec3 type:MM_ANONPAGES val:22 [ 235.695681] ================================================================== [ 235.696821] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 235.697991] Read of size 8 at addr ffff88800fc79228 by task sshd/220 [ 235.699121] [ 235.699355] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 235.700382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 235.701380] Call Trace: [ 235.701698] [ 235.701984] dump_stack_lvl+0x91/0xf0 [ 235.702471] print_report+0xcc/0x620 [ 235.702977] ? __virt_addr_valid+0x102/0x340 [ 235.703528] ? vma_interval_tree_remove+0xc75/0xec0 [ 235.704151] ? vma_interval_tree_remove+0xc75/0xec0 [ 235.704768] kasan_report+0xbe/0xf0 [ 235.705250] ? vma_interval_tree_remove+0xc75/0xec0 [ 235.705875] vma_interval_tree_remove+0xc75/0xec0 [ 235.706487] vma_prepare+0xc54/0x11a0 [ 235.706996] __split_vma+0x5af/0x950 [ 235.707475] ? __pfx___split_vma+0x10/0x10 [ 235.708011] ? find_held_lock+0x2c/0x110 [ 235.708544] do_vmi_align_munmap+0x2ba/0x11f0 [ 235.709117] ? lock_is_held_type+0x9f/0x120 [ 235.709658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 235.710268] ? mtree_range_walk+0x632/0x900 [ 235.710843] ? mas_walk+0x5c7/0x7c0 [ 235.711319] do_vmi_munmap+0x1f1/0x2b0 [ 235.711816] mmap_region+0x1f9/0x2660 [ 235.712302] ? vm_mmap_pgoff+0x15c/0x3a0 [ 235.712815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 235.713538] ? __pfx_lock_acquire+0x10/0x10 [ 235.714072] ? __pfx_mmap_region+0x10/0x10 [ 235.714618] ? security_mmap_addr+0x7d/0xa0 [ 235.715161] ? get_unmapped_area+0x1f5/0x3f0 [ 235.715724] do_mmap+0x854/0xf00 [ 235.716173] vm_mmap_pgoff+0x1a6/0x3a0 [ 235.716684] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 235.717253] ksys_mmap_pgoff+0x3af/0x500 [ 235.717768] do_syscall_64+0x3f/0x90 [ 235.718254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 235.719094] RIP: 0033:0x7fcad4d94d82 [ 235.719654] 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 [ 235.722286] RSP: 002b:00007ffda54843a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 235.723430] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcad4d94d82 [ 235.724464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcad41ce000 [ 235.725504] RBP: 00007fcad41ce000 R08: 0000000000000009 R09: 0000000000001000 [ 235.726542] R10: 0000000000000812 R11: 0000000000000206 R12: 000056004a004ec0 [ 235.727580] R13: 00007ffda54843c0 R14: 00007ffda54843f0 R15: 00007ffda5484750 [ 235.728628] [ 235.728988] [ 235.729256] Allocated by task 213: [ 235.729780] kasan_save_stack+0x22/0x50 [ 235.730401] kasan_set_track+0x25/0x30 [ 235.731076] __kasan_slab_alloc+0x59/0x70 [ 235.731727] kmem_cache_alloc+0x16b/0x370 [ 235.732364] vm_area_dup+0x20/0x160 [ 235.732919] __split_vma+0x170/0x950 [ 235.733501] split_vma+0xc6/0x110 [ 235.734036] mprotect_fixup+0x8d2/0xb30 [ 235.734680] do_mprotect_pkey+0x87e/0xd40 [ 235.735300] __x64_sys_mprotect+0x78/0xc0 [ 235.735834] do_syscall_64+0x3f/0x90 [ 235.736328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 235.736977] [ 235.737199] Freed by task 213: [ 235.737607] kasan_save_stack+0x22/0x50 [ 235.738122] kasan_set_track+0x25/0x30 [ 235.738654] kasan_save_free_info+0x2b/0x50 [ 235.739203] __kasan_slab_free+0x10a/0x190 [ 235.739776] kmem_cache_free+0x10d/0x4d0 [ 235.740296] rcu_core+0x8c8/0x2860 [ 235.740746] __do_softirq+0x1b7/0x7d4 [ 235.741229] [ 235.741450] Last potentially related work creation: [ 235.742048] kasan_save_stack+0x22/0x50 [ 235.742587] __kasan_record_aux_stack+0x8e/0xa0 [ 235.743173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 235.743828] remove_vma+0x139/0x170 [ 235.744286] do_vmi_align_munmap+0xd4a/0x11f0 [ 235.744854] do_vmi_munmap+0x1f1/0x2b0 [ 235.745358] __vm_munmap+0x138/0x3a0 [ 235.745835] __x64_sys_munmap+0x59/0x80 [ 235.746342] do_syscall_64+0x3f/0x90 [ 235.746833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 235.747492] [ 235.747711] The buggy address belongs to the object at ffff88800fc791d0 [ 235.747711] which belongs to the cache vm_area_struct of size 168 [ 235.749217] The buggy address is located 88 bytes inside of [ 235.749217] freed 168-byte region [ffff88800fc791d0, ffff88800fc79278) [ 235.750650] [ 235.750867] The buggy address belongs to the physical page: [ 235.751533] page:000000004b606488 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc79 [ 235.752629] memcg:ffff88800fcc5101 [ 235.753063] flags: 0x100000000000200(slab|node=0|zone=1) [ 235.753716] page_type: 0xffffffff() [ 235.754175] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 235.755133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcc5101 [ 235.756075] page dumped because: kasan: bad access detected [ 235.756750] [ 235.756973] Memory state around the buggy address: [ 235.757564] ffff88800fc79100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 235.758441] ffff88800fc79180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 235.759319] >ffff88800fc79200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 235.760200] ^ [ 235.760767] ffff88800fc79280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 235.761639] ffff88800fc79300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 235.762517] ================================================================== [ 235.763478] Disabling lock debugging due to kernel taint [ 237.995582] BUG: Bad rss-counter state mm:000000000003c9b6 type:MM_FILEPAGES val:33 [ 237.996572] BUG: Bad rss-counter state mm:000000000003c9b6 type:MM_ANONPAGES val:22 [ 238.474207] BUG: Bad rss-counter state mm:000000009b500d02 type:MM_FILEPAGES val:33 [ 238.475234] BUG: Bad rss-counter state mm:000000009b500d02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5391' (ECDSA) to the list of known hosts. 2023/06/19 21:23:02 fuzzer started 2023/06/19 21:23:02 dialing manager at localhost:44161 2023/06/19 21:23:02 checking machine... 2023/06/19 21:23:02 checking revisions... [ 239.195911] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:23:03 testing simple program... [ 239.250744] cgroup: Unknown subsys name 'net' [ 239.331984] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:19:37 Registers: info registers vcpu 0 RAX=1ffff11001983839 RBX=ffff88800cc1c198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cc1c1c8 RBP=ffff88800c070ee8 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800d95d680 R14=ffffffff8186b9c5 R15=ffff88800f092a00 RIP=ffffffff81846362 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 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=00007fff7acea8d8 CR3=000000000e924000 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=2032303a33323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a33323a3132203931 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007ff99eab0000 CR3=000000000f3ec000 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=bc8be9fc9a56bc85a044256ddb8a0baa XMM02=0000000000136be0ec2efd57dc4c00df XMM03=000000000013afe0b235e4473dad1fab XMM04=faf431ab4208924f00000000000ae988 XMM05=19e9129bd510f235000000000015ca18 XMM06=4fda316b135da52b000000000015c8a0 XMM07=e042d86d42eb936e000000000013b260 XMM08=b235e4473dad1fab0000000000136c40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000