syzkaller login: [ 38.874337] BUG: Bad rss-counter state mm:0000000030766a85 type:MM_FILEPAGES val:33 [ 38.875352] BUG: Bad rss-counter state mm:0000000030766a85 type:MM_ANONPAGES val:22 [ 39.038340] ================================================================== [ 39.039449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.040401] Read of size 8 at addr ffff88800cbe83f8 by task sshd/221 [ 39.041275] [ 39.041494] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.042342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.043336] Call Trace: [ 39.043652] [ 39.043936] dump_stack_lvl+0x91/0xf0 [ 39.044423] print_report+0xcc/0x620 [ 39.044904] ? __virt_addr_valid+0x102/0x340 [ 39.045450] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.046063] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.046670] kasan_report+0xbe/0xf0 [ 39.047150] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.047764] vma_interval_tree_remove+0xc75/0xec0 [ 39.048359] vma_prepare+0xc54/0x11a0 [ 39.048837] __split_vma+0x5af/0x950 [ 39.049309] ? __pfx___split_vma+0x10/0x10 [ 39.049839] ? find_held_lock+0x2c/0x110 [ 39.050359] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.050922] ? lock_is_held_type+0x9f/0x120 [ 39.051485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.052088] ? mtree_range_walk+0x632/0x900 [ 39.052639] ? mas_walk+0x5c7/0x7c0 [ 39.053123] do_vmi_munmap+0x1f1/0x2b0 [ 39.053610] mmap_region+0x1f9/0x2660 [ 39.054084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.054596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.055309] ? __pfx_lock_acquire+0x10/0x10 [ 39.055843] ? __pfx_mmap_region+0x10/0x10 [ 39.056371] ? security_mmap_addr+0x7d/0xa0 [ 39.056894] ? get_unmapped_area+0x1f5/0x3f0 [ 39.057445] do_mmap+0x854/0xf00 [ 39.057883] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.058376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.058937] ksys_mmap_pgoff+0x3af/0x500 [ 39.059456] do_syscall_64+0x3f/0x90 [ 39.059933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.060585] RIP: 0033:0x7f005d706d82 [ 39.061045] 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 [ 39.063175] RSP: 002b:00007ffe241cd278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.064083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f005d706d82 [ 39.064920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f005cb40000 [ 39.065770] RBP: 00007f005cb40000 R08: 0000000000000009 R09: 0000000000001000 [ 39.066613] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ca115fec0 [ 39.067475] R13: 00007ffe241cd290 R14: 00007ffe241cd2c0 R15: 00007ffe241cd620 [ 39.068335] [ 39.068628] [ 39.068847] Allocated by task 214: [ 39.069273] kasan_save_stack+0x22/0x50 [ 39.069783] kasan_set_track+0x25/0x30 [ 39.070273] __kasan_slab_alloc+0x59/0x70 [ 39.070800] kmem_cache_alloc+0x16b/0x370 [ 39.071333] vm_area_dup+0x20/0x160 [ 39.071795] __split_vma+0x170/0x950 [ 39.072258] split_vma+0xc6/0x110 [ 39.072707] mprotect_fixup+0x8d2/0xb30 [ 39.073216] do_mprotect_pkey+0x87e/0xd40 [ 39.073740] __x64_sys_mprotect+0x78/0xc0 [ 39.074258] do_syscall_64+0x3f/0x90 [ 39.074740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.075395] [ 39.075608] Freed by task 214: [ 39.075996] kasan_save_stack+0x22/0x50 [ 39.076501] kasan_set_track+0x25/0x30 [ 39.076994] kasan_save_free_info+0x2b/0x50 [ 39.077527] __kasan_slab_free+0x10a/0x190 [ 39.078060] kmem_cache_free+0x10d/0x4d0 [ 39.078564] rcu_core+0x8c8/0x2860 [ 39.079013] __do_softirq+0x1b7/0x7d4 [ 39.079507] [ 39.079725] Last potentially related work creation: [ 39.080304] kasan_save_stack+0x22/0x50 [ 39.080804] __kasan_record_aux_stack+0x8e/0xa0 [ 39.081372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.082011] remove_vma+0x139/0x170 [ 39.082458] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.083014] do_vmi_munmap+0x1f1/0x2b0 [ 39.083505] __vm_munmap+0x138/0x3a0 [ 39.083965] __x64_sys_munmap+0x59/0x80 [ 39.084463] do_syscall_64+0x3f/0x90 [ 39.084938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.085587] [ 39.085805] The buggy address belongs to the object at ffff88800cbe83a0 [ 39.085805] which belongs to the cache vm_area_struct of size 168 [ 39.087288] The buggy address is located 88 bytes inside of [ 39.087288] freed 168-byte region [ffff88800cbe83a0, ffff88800cbe8448) [ 39.088672] [ 39.088887] The buggy address belongs to the physical page: [ 39.089539] page:00000000f98f9449 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbe8 [ 39.090620] memcg:ffff88800dec2a01 [ 39.091075] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.091805] page_type: 0xffffffff() [ 39.092273] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.093234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dec2a01 [ 39.094177] page dumped because: kasan: bad access detected [ 39.094886] [ 39.095127] Memory state around the buggy address: [ 39.095744] ffff88800cbe8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.096645] ffff88800cbe8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.097535] >ffff88800cbe8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.098425] ^ [ 39.099315] ffff88800cbe8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.100202] ffff88800cbe8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.101088] ================================================================== [ 39.102096] Disabling lock debugging due to kernel taint [ 41.420276] BUG: Bad rss-counter state mm:000000008e4c8ff4 type:MM_FILEPAGES val:33 [ 41.421352] BUG: Bad rss-counter state mm:000000008e4c8ff4 type:MM_ANONPAGES val:22 [ 41.944738] BUG: Bad rss-counter state mm:000000007f037090 type:MM_FILEPAGES val:33 [ 41.945896] BUG: Bad rss-counter state mm:000000007f037090 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2368' (ECDSA) to the list of known hosts. 2023/06/21 06:47:39 fuzzer started 2023/06/21 06:47:39 dialing manager at localhost:36067 2023/06/21 06:47:39 checking machine... 2023/06/21 06:47:39 checking revisions... [ 42.674394] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:47:39 testing simple program... [ 42.726963] cgroup: Unknown subsys name 'net' [ 42.775329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:47:39 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1329 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d928f RFL=00000247 [---Z-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 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=00007ffb256faed0 CR3=0000000014556000 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=2039333a37343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a37343a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861390a8 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800950f4f0 RSP=ffff88800950f428 R8 =ffffffff861390ac R9 =ffff88800950f4d8 R10=0000000000038001 R11=0000000000020de5 R12=ffff88800950f4f8 R13=ffff88800950f4e0 R14=ffff88800950f4d9 R15=ffff88800950f498 RIP=ffffffff81130ad6 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 00007f5b64814900 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=00007ffc39d3f000 CR3=000000000cb92000 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=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