syzkaller login: [ 72.631400] BUG: Bad rss-counter state mm:0000000035d0e624 type:MM_FILEPAGES val:33 [ 72.632394] BUG: Bad rss-counter state mm:0000000035d0e624 type:MM_ANONPAGES val:22 [ 72.791176] ================================================================== [ 72.792057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.793002] Read of size 8 at addr ffff888018df94e0 by task sshd/227 [ 72.793752] [ 72.793960] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 72.794807] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.795900] Call Trace: [ 72.796212] [ 72.796486] dump_stack_lvl+0x91/0xf0 [ 72.796980] print_report+0xcc/0x620 [ 72.797480] ? __virt_addr_valid+0x102/0x340 [ 72.798025] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.798632] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.799229] kasan_report+0xbe/0xf0 [ 72.799697] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.800303] vma_interval_tree_remove+0xc75/0xec0 [ 72.800914] vma_prepare+0xc54/0x11a0 [ 72.801390] __split_vma+0x5af/0x950 [ 72.801861] ? __pfx___split_vma+0x10/0x10 [ 72.802380] ? find_held_lock+0x2c/0x110 [ 72.802890] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.803446] ? lock_is_held_type+0x9f/0x120 [ 72.803970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.804576] ? mtree_range_walk+0x632/0x900 [ 72.805115] ? mas_walk+0x5c7/0x7c0 [ 72.805587] do_vmi_munmap+0x1f1/0x2b0 [ 72.806065] mmap_region+0x1f9/0x2660 [ 72.806541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.807042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.807745] ? __pfx_lock_acquire+0x10/0x10 [ 72.808262] ? __pfx_mmap_region+0x10/0x10 [ 72.808778] ? security_mmap_addr+0x7d/0xa0 [ 72.809300] ? get_unmapped_area+0x1f5/0x3f0 [ 72.809840] do_mmap+0x854/0xf00 [ 72.810269] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.810762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.811316] ksys_mmap_pgoff+0x3af/0x500 [ 72.811818] do_syscall_64+0x3f/0x90 [ 72.812287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.812946] RIP: 0033:0x7f581a7c5d82 [ 72.813400] 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 [ 72.815497] RSP: 002b:00007ffd900e9e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.816383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f581a7c5d82 [ 72.817230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5819bff000 [ 72.818054] RBP: 00007f5819bff000 R08: 0000000000000009 R09: 0000000000001000 [ 72.818887] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da55a2fec0 [ 72.819715] R13: 00007ffd900e9e70 R14: 00007ffd900e9ea0 R15: 00007ffd900ea200 [ 72.820565] [ 72.820849] [ 72.821056] Allocated by task 220: [ 72.821477] kasan_save_stack+0x22/0x50 [ 72.821965] kasan_set_track+0x25/0x30 [ 72.822448] __kasan_slab_alloc+0x59/0x70 [ 72.822952] kmem_cache_alloc+0x16b/0x370 [ 72.823462] vm_area_dup+0x20/0x160 [ 72.823912] __split_vma+0x170/0x950 [ 72.824365] split_vma+0xc6/0x110 [ 72.824817] mprotect_fixup+0x8d2/0xb30 [ 72.825313] do_mprotect_pkey+0x87e/0xd40 [ 72.825818] __x64_sys_mprotect+0x78/0xc0 [ 72.826331] do_syscall_64+0x3f/0x90 [ 72.826801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.827439] [ 72.827657] Freed by task 204: [ 72.828033] kasan_save_stack+0x22/0x50 [ 72.828537] kasan_set_track+0x25/0x30 [ 72.829030] kasan_save_free_info+0x2b/0x50 [ 72.829558] __kasan_slab_free+0x10a/0x190 [ 72.830085] kmem_cache_free+0x10d/0x4d0 [ 72.830581] rcu_core+0x8c8/0x2860 [ 72.831020] __do_softirq+0x1b7/0x7d4 [ 72.831499] [ 72.831711] Last potentially related work creation: [ 72.832279] kasan_save_stack+0x22/0x50 [ 72.832789] __kasan_record_aux_stack+0x8e/0xa0 [ 72.833346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.833982] remove_vma+0x139/0x170 [ 72.834423] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.834972] do_vmi_munmap+0x1f1/0x2b0 [ 72.835447] __vm_munmap+0x138/0x3a0 [ 72.835913] __x64_sys_munmap+0x59/0x80 [ 72.836408] do_syscall_64+0x3f/0x90 [ 72.836956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.837594] [ 72.837805] The buggy address belongs to the object at ffff888018df9488 [ 72.837805] which belongs to the cache vm_area_struct of size 168 [ 72.839254] The buggy address is located 88 bytes inside of [ 72.839254] freed 168-byte region [ffff888018df9488, ffff888018df9530) [ 72.840652] [ 72.840862] The buggy address belongs to the physical page: [ 72.841512] page:000000008ad86234 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18df9 [ 72.842594] memcg:ffff888018e8fc01 [ 72.843016] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.843655] page_type: 0xffffffff() [ 72.844099] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 72.845025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e8fc01 [ 72.845915] page dumped because: kasan: bad access detected [ 72.846562] [ 72.846774] Memory state around the buggy address: [ 72.847341] ffff888018df9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.848187] ffff888018df9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 72.849044] >ffff888018df9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.849885] ^ [ 72.850637] ffff888018df9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 72.851468] ffff888018df9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.852296] ================================================================== [ 72.853285] Disabling lock debugging due to kernel taint [ 75.429132] BUG: Bad rss-counter state mm:000000005ff9d4e3 type:MM_FILEPAGES val:33 [ 75.430322] BUG: Bad rss-counter state mm:000000005ff9d4e3 type:MM_ANONPAGES val:22 [ 75.801136] BUG: Bad rss-counter state mm:000000001b8a3d5c type:MM_FILEPAGES val:33 [ 75.802117] BUG: Bad rss-counter state mm:000000001b8a3d5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2127' (ECDSA) to the list of known hosts. 2023/06/20 06:43:57 fuzzer started 2023/06/20 06:43:57 dialing manager at localhost:44161 2023/06/20 06:43:57 checking machine... 2023/06/20 06:43:57 checking revisions... [ 76.499213] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:43:58 testing simple program... [ 76.550622] cgroup: Unknown subsys name 'net' [ 76.587869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:43:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001e51f2e RSI=ffffffff84506c8c RDI=ffff88800f28f930 RBP=ffff88800f28f988 RSP=ffff88800f28f8c0 R8 =0000000000000001 R9 =ffff88800f28f970 R10=0000000000038001 R11=00000000000b5311 R12=ffff88800f28f990 R13=ffff88800f28f978 R14=ffff88800f28f971 R15=ffff88800f28f930 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007f0bf4899900 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=00007ffc0d484000 CR3=000000000fcea000 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=dffffc0000000000 RBX=ffff88807ffdc000 RCX=1ffffffff0ba77d6 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888008d71f34 RBP=ffff888008d71b40 RSP=ffff88806cf09cd0 R8 =0000000000000000 R9 =fffffbfff0f70c08 R10=0000000000000003 R11=0000000000000128 R12=0000000000000006 R13=00000000fffff868 R14=0000000000000000 R15=ffff88806cf361f0 RIP=ffffffff81374491 RFL=00000013 [----A-C] 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=00007f1e35183490 CR3=000000000dfd4000 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=2037353a33343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a33343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000