syzkaller login: [ 264.447693] BUG: Bad rss-counter state mm:000000008b58a4a9 type:MM_FILEPAGES val:33 [ 264.448901] BUG: Bad rss-counter state mm:000000008b58a4a9 type:MM_ANONPAGES val:22 [ 264.489859] ================================================================== [ 264.491009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 264.492210] Read of size 8 at addr ffff88800e69a5c8 by task sshd/222 [ 264.493119] [ 264.493376] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 264.494619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 264.495793] Call Trace: [ 264.496181] [ 264.496517] dump_stack_lvl+0x91/0xf0 [ 264.497100] print_report+0xcc/0x620 [ 264.497677] ? __virt_addr_valid+0x102/0x340 [ 264.498373] ? vma_interval_tree_remove+0xc75/0xec0 [ 264.499114] ? vma_interval_tree_remove+0xc75/0xec0 [ 264.499729] kasan_report+0xbe/0xf0 [ 264.500209] ? vma_interval_tree_remove+0xc75/0xec0 [ 264.500829] vma_interval_tree_remove+0xc75/0xec0 [ 264.501441] vma_prepare+0xc54/0x11a0 [ 264.501921] __split_vma+0x5af/0x950 [ 264.502412] ? __pfx___split_vma+0x10/0x10 [ 264.502950] ? find_held_lock+0x2c/0x110 [ 264.503473] do_vmi_align_munmap+0x2ba/0x11f0 [ 264.504047] ? lock_is_held_type+0x9f/0x120 [ 264.504585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 264.505203] ? mtree_range_walk+0x632/0x900 [ 264.505749] ? mas_walk+0x5c7/0x7c0 [ 264.506234] do_vmi_munmap+0x1f1/0x2b0 [ 264.506723] mmap_region+0x1f9/0x2660 [ 264.507211] ? vm_mmap_pgoff+0x15c/0x3a0 [ 264.507726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 264.508440] ? __pfx_lock_acquire+0x10/0x10 [ 264.508982] ? __pfx_mmap_region+0x10/0x10 [ 264.509520] ? security_mmap_addr+0x7d/0xa0 [ 264.510070] ? get_unmapped_area+0x1f5/0x3f0 [ 264.510617] do_mmap+0x854/0xf00 [ 264.511055] vm_mmap_pgoff+0x1a6/0x3a0 [ 264.511559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 264.512131] ksys_mmap_pgoff+0x3af/0x500 [ 264.512642] do_syscall_64+0x3f/0x90 [ 264.513131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 264.513814] RIP: 0033:0x7f19680cbd82 [ 264.514312] 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 [ 264.516448] RSP: 002b:00007ffe093898b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 264.517367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19680cbd82 [ 264.518253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1967505000 [ 264.519055] RBP: 00007f1967505000 R08: 0000000000000009 R09: 0000000000001000 [ 264.519863] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644e4366d90 [ 264.520672] R13: 00007ffe093898d0 R14: 00007ffe09389900 R15: 00007ffe09389c60 [ 264.521484] [ 264.521762] [ 264.521978] Allocated by task 215: [ 264.522399] kasan_save_stack+0x22/0x50 [ 264.522898] kasan_set_track+0x25/0x30 [ 264.523396] __kasan_slab_alloc+0x59/0x70 [ 264.523917] kmem_cache_alloc+0x16b/0x370 [ 264.524422] vm_area_dup+0x20/0x160 [ 264.524863] __split_vma+0x170/0x950 [ 264.525320] split_vma+0xc6/0x110 [ 264.525751] mprotect_fixup+0x8d2/0xb30 [ 264.526270] do_mprotect_pkey+0x87e/0xd40 [ 264.526785] __x64_sys_mprotect+0x78/0xc0 [ 264.527301] do_syscall_64+0x3f/0x90 [ 264.527770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 264.528413] [ 264.528620] Freed by task 215: [ 264.529003] kasan_save_stack+0x22/0x50 [ 264.529545] kasan_set_track+0x25/0x30 [ 264.530059] kasan_save_free_info+0x2b/0x50 [ 264.530640] __kasan_slab_free+0x10a/0x190 [ 264.531182] kmem_cache_free+0x10d/0x4d0 [ 264.531674] rcu_core+0x8c8/0x2860 [ 264.532120] __do_softirq+0x1b7/0x7d4 [ 264.532584] [ 264.532792] Last potentially related work creation: [ 264.533365] kasan_save_stack+0x22/0x50 [ 264.533857] __kasan_record_aux_stack+0x8e/0xa0 [ 264.534440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 264.535065] remove_vma+0x139/0x170 [ 264.535505] do_vmi_align_munmap+0xd4a/0x11f0 [ 264.536041] do_vmi_munmap+0x1f1/0x2b0 [ 264.536507] __vm_munmap+0x138/0x3a0 [ 264.536960] __x64_sys_munmap+0x59/0x80 [ 264.537501] do_syscall_64+0x3f/0x90 [ 264.537995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 264.538669] [ 264.538876] Second to last potentially related work creation: [ 264.539547] kasan_save_stack+0x22/0x50 [ 264.540038] __kasan_record_aux_stack+0x8e/0xa0 [ 264.540595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 264.541224] remove_vma+0x139/0x170 [ 264.541678] do_vmi_align_munmap+0xd4a/0x11f0 [ 264.542244] do_vmi_munmap+0x1f1/0x2b0 [ 264.542722] mmap_region+0x1f9/0x2660 [ 264.543190] do_mmap+0x854/0xf00 [ 264.543611] vm_mmap_pgoff+0x1a6/0x3a0 [ 264.544094] ksys_mmap_pgoff+0x3af/0x500 [ 264.544582] do_syscall_64+0x3f/0x90 [ 264.545058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 264.545685] [ 264.545899] The buggy address belongs to the object at ffff88800e69a570 [ 264.545899] which belongs to the cache vm_area_struct of size 168 [ 264.547368] The buggy address is located 88 bytes inside of [ 264.547368] freed 168-byte region [ffff88800e69a570, ffff88800e69a618) [ 264.548744] [ 264.548954] The buggy address belongs to the physical page: [ 264.549601] page:0000000008f9c855 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe69a [ 264.550749] memcg:ffff88800ed76201 [ 264.551197] flags: 0x100000000000200(slab|node=0|zone=1) [ 264.551863] page_type: 0xffffffff() [ 264.552326] raw: 0100000000000200 ffff88800879fc80 ffffea00003a8d80 dead000000000002 [ 264.553271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed76201 [ 264.554237] page dumped because: kasan: bad access detected [ 264.554911] [ 264.555134] Memory state around the buggy address: [ 264.555741] ffff88800e69a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 264.556606] ffff88800e69a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 264.557485] >ffff88800e69a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 264.558362] ^ [ 264.559063] ffff88800e69a600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 264.559969] ffff88800e69a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 264.560868] ================================================================== [ 264.562209] Disabling lock debugging due to kernel taint [ 267.069599] BUG: Bad rss-counter state mm:00000000c08b0b8d type:MM_FILEPAGES val:33 [ 267.070797] BUG: Bad rss-counter state mm:00000000c08b0b8d type:MM_ANONPAGES val:22 [ 267.528170] BUG: Bad rss-counter state mm:000000006e5c18b2 type:MM_FILEPAGES val:33 [ 267.529425] BUG: Bad rss-counter state mm:000000006e5c18b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8487' (ECDSA) to the list of known hosts. 2023/06/20 00:41:30 fuzzer started 2023/06/20 00:41:31 dialing manager at localhost:44161 2023/06/20 00:41:31 checking machine... 2023/06/20 00:41:31 checking revisions... [ 268.200405] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:41:31 testing simple program... [ 268.250125] cgroup: Unknown subsys name 'net' [ 268.293350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fe40000 RCX=ffffffff83873f57 RDX=ffff8880146c8000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888008e9c000 RSP=ffff88800fd7fb10 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff888008e9c000 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801692f780 R14=0000000000000007 R15=ffff88801692f780 RIP=ffffffff814c07e4 RFL=00000287 [--S--PC] 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 00007fba71c07900 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=00007fba721be618 CR3=000000000e1dc000 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=2030333a31343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a31343a3030203032 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=00007f0215967050 CR3=000000000c424000 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=cde58437957e0eac5c48b3a400cc0231 XMM02=0000000000139e50eff9b2d0a8fce9cb XMM03=0000000000139f202c67c8bc2e329bc3 XMM04=5e98ae71dc2a58d900000000000ae988 XMM05=5a9d233068761c4a0000000000162128 XMM06=db20f175d54767f00000000000161fb0 XMM07=e042d86d42eb936e0000000000140ef0 XMM08=6ec4649cf438f3d20000000000139f20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000