syzkaller login: [ 38.860822] BUG: Bad rss-counter state mm:00000000d3705b72 type:MM_FILEPAGES val:33 [ 38.861578] BUG: Bad rss-counter state mm:00000000d3705b72 type:MM_ANONPAGES val:22 [ 39.034630] ================================================================== [ 39.035300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.035962] Read of size 8 at addr ffff88800c9ca5c8 by task sshd/222 [ 39.036509] [ 39.036669] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.038418] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.039388] Call Trace: [ 39.039639] [ 39.039853] dump_stack_lvl+0x91/0xf0 [ 39.040231] print_report+0xcc/0x620 [ 39.040608] ? __virt_addr_valid+0x102/0x340 [ 39.041158] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.041705] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.042264] kasan_report+0xbe/0xf0 [ 39.043484] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.044346] vma_interval_tree_remove+0xc75/0xec0 [ 39.044796] vma_prepare+0xc54/0x11a0 [ 39.045167] __split_vma+0x5af/0x950 [ 39.045579] ? __pfx___split_vma+0x10/0x10 [ 39.045965] ? find_held_lock+0x2c/0x110 [ 39.046361] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.046769] ? lock_is_held_type+0x9f/0x120 [ 39.047155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.047583] ? mtree_range_walk+0x632/0x900 [ 39.047977] ? mas_walk+0x5c7/0x7c0 [ 39.048312] do_vmi_munmap+0x1f1/0x2b0 [ 39.048669] mmap_region+0x1f9/0x2660 [ 39.053605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.054764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.056420] ? __pfx_lock_acquire+0x10/0x10 [ 39.057762] ? __pfx_mmap_region+0x10/0x10 [ 39.058964] ? security_mmap_addr+0x7d/0xa0 [ 39.060218] ? get_unmapped_area+0x1f5/0x3f0 [ 39.061607] do_mmap+0x854/0xf00 [ 39.062561] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.063694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.064961] ksys_mmap_pgoff+0x3af/0x500 [ 39.066064] do_syscall_64+0x3f/0x90 [ 39.067134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.068543] RIP: 0033:0x7f8345666d82 [ 39.069562] 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 [ 39.074666] RSP: 002b:00007ffd1f593828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.076710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8345666d82 [ 39.078696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8344aa0000 [ 39.080670] RBP: 00007f8344aa0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.082674] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562faa3aaec0 [ 39.084698] R13: 00007ffd1f593840 R14: 00007ffd1f593870 R15: 00007ffd1f593bd0 [ 39.086661] [ 39.087266] [ 39.087732] Allocated by task 213: [ 39.088718] kasan_save_stack+0x22/0x50 [ 39.089849] kasan_set_track+0x25/0x30 [ 39.091201] __kasan_slab_alloc+0x59/0x70 [ 39.091611] kmem_cache_alloc+0x16b/0x370 [ 39.092011] vm_area_dup+0x20/0x160 [ 39.092821] __split_vma+0x170/0x950 [ 39.093859] split_vma+0xc6/0x110 [ 39.094804] mprotect_fixup+0x8d2/0xb30 [ 39.095889] do_mprotect_pkey+0x87e/0xd40 [ 39.097219] __x64_sys_mprotect+0x78/0xc0 [ 39.098554] do_syscall_64+0x3f/0x90 [ 39.099609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.101112] [ 39.101556] Freed by task 213: [ 39.102471] kasan_save_stack+0x22/0x50 [ 39.103577] kasan_set_track+0x25/0x30 [ 39.104639] kasan_save_free_info+0x2b/0x50 [ 39.105779] __kasan_slab_free+0x10a/0x190 [ 39.106943] kmem_cache_free+0x10d/0x4d0 [ 39.108069] rcu_core+0x8c8/0x2860 [ 39.108956] __do_softirq+0x1b7/0x7d4 [ 39.109300] [ 39.109458] Last potentially related work creation: [ 39.109874] kasan_save_stack+0x22/0x50 [ 39.110233] __kasan_record_aux_stack+0x8e/0xa0 [ 39.110642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.111111] remove_vma+0x139/0x170 [ 39.111439] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.111843] do_vmi_munmap+0x1f1/0x2b0 [ 39.112196] __vm_munmap+0x138/0x3a0 [ 39.112528] __x64_sys_munmap+0x59/0x80 [ 39.112922] do_syscall_64+0x3f/0x90 [ 39.113264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.113722] [ 39.113878] The buggy address belongs to the object at ffff88800c9ca570 [ 39.113878] which belongs to the cache vm_area_struct of size 168 [ 39.114893] The buggy address is located 88 bytes inside of [ 39.114893] freed 168-byte region [ffff88800c9ca570, ffff88800c9ca618) [ 39.115869] [ 39.116031] The buggy address belongs to the physical page: [ 39.116496] page:000000006bdb43f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ca [ 39.117323] memcg:ffff88800e285701 [ 39.117626] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.118116] page_type: 0xffffffff() [ 39.118436] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.119080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e285701 [ 39.119714] page dumped because: kasan: bad access detected [ 39.120191] [ 39.120345] Memory state around the buggy address: [ 39.120754] ffff88800c9ca480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.121386] ffff88800c9ca500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.121993] >ffff88800c9ca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.122597] ^ [ 39.123071] ffff88800c9ca600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.123675] ffff88800c9ca680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.124290] ================================================================== [ 39.125367] Disabling lock debugging due to kernel taint [ 41.429090] BUG: Bad rss-counter state mm:00000000a5e9c2c0 type:MM_FILEPAGES val:33 [ 41.430020] BUG: Bad rss-counter state mm:00000000a5e9c2c0 type:MM_ANONPAGES val:22 [ 42.031857] BUG: Bad rss-counter state mm:00000000b53dc04b type:MM_FILEPAGES val:33 [ 42.033580] BUG: Bad rss-counter state mm:00000000b53dc04b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62945' (ECDSA) to the list of known hosts. 2023/06/20 08:16:41 fuzzer started 2023/06/20 08:16:41 dialing manager at localhost:44161 2023/06/20 08:16:41 checking machine... 2023/06/20 08:16:41 checking revisions... [ 42.868954] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:16:41 testing simple program... [ 42.909035] cgroup: Unknown subsys name 'net' [ 42.976415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:40 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800e577ab8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff845136aa R14=ffffffff811654d8 R15=ffff88800cd9ca00 RIP=ffffffff8180f009 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=00007fdc23c5b328 CR3=0000000005482000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=1ffffffff0ba7a02 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001fa4efa RSP=ffff88800fd277c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800fb91df0 R13=ffffffff81709f49 R14=0000000000000001 R15=ffff8880169322e0 RIP=ffffffff812d86c0 RFL=00000212 [----A--] 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=00007faf88363790 CR3=000000001a19a000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=f309e092c30d04ed0000000000000000 XMM05=382dde69cf85135b9f9db73599e7b4f0 XMM06=0c78084cb3510b6f8a13fd7a0cb206f1 XMM07=d4c63d958b01129b3a601ac1115979fb XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000