syzkaller login: [ 66.389588] BUG: Bad rss-counter state mm:00000000f602a4df type:MM_FILEPAGES val:33 [ 66.390792] BUG: Bad rss-counter state mm:00000000f602a4df type:MM_ANONPAGES val:22 [ 66.428248] ================================================================== [ 66.429198] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.430138] Read of size 8 at addr ffff88800d62cb38 by task sshd/220 [ 66.430931] [ 66.431153] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 66.432178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.433152] Call Trace: [ 66.433476] [ 66.433760] dump_stack_lvl+0x91/0xf0 [ 66.434251] print_report+0xcc/0x620 [ 66.434735] ? __virt_addr_valid+0x102/0x340 [ 66.435302] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.435921] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.436542] kasan_report+0xbe/0xf0 [ 66.437024] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.437647] vma_interval_tree_remove+0xc75/0xec0 [ 66.438249] vma_prepare+0xc54/0x11a0 [ 66.438724] __split_vma+0x5af/0x950 [ 66.439198] ? __pfx___split_vma+0x10/0x10 [ 66.439731] ? find_held_lock+0x2c/0x110 [ 66.440257] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.440822] ? lock_is_held_type+0x9f/0x120 [ 66.441364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.441968] ? mtree_range_walk+0x632/0x900 [ 66.442516] ? mas_walk+0x5c7/0x7c0 [ 66.443009] do_vmi_munmap+0x1f1/0x2b0 [ 66.443507] mmap_region+0x1f9/0x2660 [ 66.443988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.444505] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.445229] ? __pfx_lock_acquire+0x10/0x10 [ 66.445758] ? __pfx_mmap_region+0x10/0x10 [ 66.446290] ? security_mmap_addr+0x7d/0xa0 [ 66.446818] ? get_unmapped_area+0x1f5/0x3f0 [ 66.447386] do_mmap+0x854/0xf00 [ 66.447823] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.448321] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.448883] ksys_mmap_pgoff+0x3af/0x500 [ 66.449392] do_syscall_64+0x3f/0x90 [ 66.449868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.450519] RIP: 0033:0x7f98f1ebcd82 [ 66.450982] 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 [ 66.453126] RSP: 002b:00007ffe8bb518b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.454048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98f1ebcd82 [ 66.454933] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f98f12f6000 [ 66.455780] RBP: 00007f98f12f6000 R08: 0000000000000009 R09: 0000000000001000 [ 66.456646] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651a85c7ec0 [ 66.457515] R13: 00007ffe8bb518d0 R14: 00007ffe8bb51900 R15: 00007ffe8bb51c60 [ 66.458370] [ 66.458666] [ 66.458885] Allocated by task 213: [ 66.459317] kasan_save_stack+0x22/0x50 [ 66.459823] kasan_set_track+0x25/0x30 [ 66.460315] __kasan_slab_alloc+0x59/0x70 [ 66.460839] kmem_cache_alloc+0x16b/0x370 [ 66.461352] vm_area_dup+0x20/0x160 [ 66.461808] __split_vma+0x170/0x950 [ 66.462282] split_vma+0xc6/0x110 [ 66.462728] mprotect_fixup+0x8d2/0xb30 [ 66.463248] do_mprotect_pkey+0x87e/0xd40 [ 66.463776] __x64_sys_mprotect+0x78/0xc0 [ 66.464300] do_syscall_64+0x3f/0x90 [ 66.464829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.465471] [ 66.465685] Freed by task 213: [ 66.466078] kasan_save_stack+0x22/0x50 [ 66.466580] kasan_set_track+0x25/0x30 [ 66.467088] kasan_save_free_info+0x2b/0x50 [ 66.467626] __kasan_slab_free+0x10a/0x190 [ 66.468191] kmem_cache_free+0x10d/0x4d0 [ 66.468715] rcu_core+0x8c8/0x2860 [ 66.469175] __do_softirq+0x1b7/0x7d4 [ 66.469673] [ 66.469903] Last potentially related work creation: [ 66.470519] kasan_save_stack+0x22/0x50 [ 66.471047] __kasan_record_aux_stack+0x8e/0xa0 [ 66.471652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.472337] remove_vma+0x139/0x170 [ 66.472816] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.473404] do_vmi_munmap+0x1f1/0x2b0 [ 66.473905] __vm_munmap+0x138/0x3a0 [ 66.474399] __x64_sys_munmap+0x59/0x80 [ 66.474936] do_syscall_64+0x3f/0x90 [ 66.475453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.476127] [ 66.476352] The buggy address belongs to the object at ffff88800d62cae0 [ 66.476352] which belongs to the cache vm_area_struct of size 168 [ 66.477901] The buggy address is located 88 bytes inside of [ 66.477901] freed 168-byte region [ffff88800d62cae0, ffff88800d62cb88) [ 66.479384] [ 66.479619] The buggy address belongs to the physical page: [ 66.480306] page:000000002b97a00f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd62c [ 66.481424] memcg:ffff88800fcd5701 [ 66.481866] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.482538] page_type: 0xffffffff() [ 66.483037] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.484000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcd5701 [ 66.484939] page dumped because: kasan: bad access detected [ 66.485622] [ 66.485847] Memory state around the buggy address: [ 66.486456] ffff88800d62ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.487369] ffff88800d62ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 66.488254] >ffff88800d62cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.489145] ^ [ 66.489774] ffff88800d62cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 66.490678] ffff88800d62cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 66.491605] ================================================================== [ 66.492710] Disabling lock debugging due to kernel taint [ 68.422995] BUG: Bad rss-counter state mm:000000006c097825 type:MM_FILEPAGES val:33 [ 68.424621] BUG: Bad rss-counter state mm:000000006c097825 type:MM_ANONPAGES val:22 [ 68.893978] BUG: Bad rss-counter state mm:00000000f16cb427 type:MM_FILEPAGES val:33 [ 68.895033] BUG: Bad rss-counter state mm:00000000f16cb427 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43092' (ECDSA) to the list of known hosts. 2023/06/19 15:25:38 fuzzer started 2023/06/19 15:25:39 dialing manager at localhost:44161 2023/06/19 15:25:39 checking machine... 2023/06/19 15:25:39 checking revisions... [ 69.625669] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:25:39 testing simple program... [ 69.679350] cgroup: Unknown subsys name 'net' [ 69.718685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:25:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018138000 RCX=ffffffff83862a5b RDX=1ffffffff0b74940 RSI=0000000000000004 RDI=ffffffff85ba4a00 RBP=ffffffff85ba4900 RSP=ffff888018177750 R8 =0000000000000001 R9 =ffffed1003027042 R10=ffff888018138213 R11=00000000000b6996 R12=0000000000000380 R13=0000000000000380 R14=ffff888018138210 R15=ffff888018138238 RIP=ffffffff83862ad8 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 00007f244ee8d900 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=00007ffe28b17000 CR3=000000000df10000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=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 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=00007f474a8ae8d0 CR3=0000000015b30000 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=2038333a35323a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35323a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000