syzkaller login: [ 31.094611] BUG: Bad rss-counter state mm:0000000087aa4d66 type:MM_FILEPAGES val:33 [ 31.096057] BUG: Bad rss-counter state mm:0000000087aa4d66 type:MM_ANONPAGES val:22 [ 31.244080] ================================================================== [ 31.245202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.246359] Read of size 8 at addr ffff88800fb08968 by task sshd/220 [ 31.247372] [ 31.247594] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.248448] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.249423] Call Trace: [ 31.249741] [ 31.250027] dump_stack_lvl+0x91/0xf0 [ 31.250512] print_report+0xcc/0x620 [ 31.251007] ? __virt_addr_valid+0x102/0x340 [ 31.251565] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252175] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252795] kasan_report+0xbe/0xf0 [ 31.253276] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253892] vma_interval_tree_remove+0xc75/0xec0 [ 31.254485] vma_prepare+0xc54/0x11a0 [ 31.254980] __split_vma+0x5af/0x950 [ 31.255452] ? __pfx___split_vma+0x10/0x10 [ 31.255994] ? find_held_lock+0x2c/0x110 [ 31.256523] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.257086] ? lock_is_held_type+0x9f/0x120 [ 31.257622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.258226] ? mtree_range_walk+0x632/0x900 [ 31.258783] ? mas_walk+0x5c7/0x7c0 [ 31.259259] do_vmi_munmap+0x1f1/0x2b0 [ 31.259747] mmap_region+0x1f9/0x2660 [ 31.260238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.260748] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.261454] ? __pfx_lock_acquire+0x10/0x10 [ 31.261980] ? __pfx_mmap_region+0x10/0x10 [ 31.262507] ? security_mmap_addr+0x7d/0xa0 [ 31.263067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.263614] do_mmap+0x854/0xf00 [ 31.264052] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.264545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.265105] ksys_mmap_pgoff+0x3af/0x500 [ 31.265611] do_syscall_64+0x3f/0x90 [ 31.266086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266732] RIP: 0033:0x7f95f575cd82 [ 31.267198] 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 [ 31.269302] RSP: 002b:00007ffff4dfac08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95f575cd82 [ 31.271069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95f4b96000 [ 31.271904] RBP: 00007f95f4b96000 R08: 0000000000000009 R09: 0000000000001000 [ 31.272748] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618da2dbf70 [ 31.273597] R13: 00007ffff4dfac20 R14: 00007ffff4dfac50 R15: 00007ffff4dfafb0 [ 31.274446] [ 31.274735] [ 31.274974] Allocated by task 213: [ 31.275404] kasan_save_stack+0x22/0x50 [ 31.275902] kasan_set_track+0x25/0x30 [ 31.276394] __kasan_slab_alloc+0x59/0x70 [ 31.276919] kmem_cache_alloc+0x16b/0x370 [ 31.277446] vm_area_dup+0x20/0x160 [ 31.277909] __split_vma+0x170/0x950 [ 31.278372] split_vma+0xc6/0x110 [ 31.278815] mprotect_fixup+0x8d2/0xb30 [ 31.279322] do_mprotect_pkey+0x87e/0xd40 [ 31.279845] __x64_sys_mprotect+0x78/0xc0 [ 31.280366] do_syscall_64+0x3f/0x90 [ 31.280838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281477] [ 31.281691] Freed by task 213: [ 31.282085] kasan_save_stack+0x22/0x50 [ 31.282587] kasan_set_track+0x25/0x30 [ 31.283097] kasan_save_free_info+0x2b/0x50 [ 31.283634] __kasan_slab_free+0x10a/0x190 [ 31.284162] kmem_cache_free+0x10d/0x4d0 [ 31.284667] rcu_core+0x8c8/0x2860 [ 31.285111] __do_softirq+0x1b7/0x7d4 [ 31.285588] [ 31.285805] Last potentially related work creation: [ 31.286417] kasan_save_stack+0x22/0x50 [ 31.286929] __kasan_record_aux_stack+0x8e/0xa0 [ 31.287499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288211] remove_vma+0x139/0x170 [ 31.288668] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289232] do_vmi_munmap+0x1f1/0x2b0 [ 31.289728] __vm_munmap+0x138/0x3a0 [ 31.290194] __x64_sys_munmap+0x59/0x80 [ 31.290696] do_syscall_64+0x3f/0x90 [ 31.291189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.291844] [ 31.292058] The buggy address belongs to the object at ffff88800fb08910 [ 31.292058] which belongs to the cache vm_area_struct of size 168 [ 31.293557] The buggy address is located 88 bytes inside of [ 31.293557] freed 168-byte region [ffff88800fb08910, ffff88800fb089b8) [ 31.294977] [ 31.295199] The buggy address belongs to the physical page: [ 31.295855] page:0000000038a093e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb08 [ 31.296934] memcg:ffff88800e9ab701 [ 31.297368] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298017] page_type: 0xffffffff() [ 31.298468] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad580 0000000000000008 [ 31.299400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9ab701 [ 31.300312] page dumped because: kasan: bad access detected [ 31.300975] [ 31.301192] Memory state around the buggy address: [ 31.301768] ffff88800fb08800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.302618] ffff88800fb08880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.303468] >ffff88800fb08900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.304314] ^ [ 31.305086] ffff88800fb08980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.305935] ffff88800fb08a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.306796] ================================================================== [ 31.307746] Disabling lock debugging due to kernel taint [ 33.195520] BUG: Bad rss-counter state mm:00000000ebcae3d8 type:MM_FILEPAGES val:33 [ 33.197163] BUG: Bad rss-counter state mm:00000000ebcae3d8 type:MM_ANONPAGES val:22 [ 33.770029] BUG: Bad rss-counter state mm:00000000b2155fd7 type:MM_FILEPAGES val:33 [ 33.771083] BUG: Bad rss-counter state mm:00000000b2155fd7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11911' (ECDSA) to the list of known hosts. 2023/06/19 18:59:25 fuzzer started 2023/06/19 18:59:25 dialing manager at localhost:44161 2023/06/19 18:59:25 checking machine... 2023/06/19 18:59:25 checking revisions... [ 34.428854] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:59:25 testing simple program... [ 34.476901] cgroup: Unknown subsys name 'net' [ 34.519936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:59:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015d89b40 RSI=ffff888009e87df8 RDI=ffff888008ecb340 RBP=ffff888009e87e58 RSP=ffff888009e87b18 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff888008ecb340 R14=ffff888009e87e60 R15=ffff888009e87df8 RIP=ffffffff81ecbf84 RFL=00000293 [--S-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 00007f59cfd35900 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=00007f59cfce901c CR3=000000001bf4e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888014740000 RCX=0000000000000001 RDX=0000000000000200 RSI=0000000000000000 RDI=ffffed10028e8180 RBP=0000000000001000 RSP=ffff888006b37808 R8 =ffff888014740000 R9 =0000000000000000 R10=ffffed10028e8000 R11=63206e6f69737365 R12=ffff888014740000 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8450d403 RFL=00000202 [-------] 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 00007f8d8057e900 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=00007f8d7f9a6570 CR3=000000000d586000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e3322f0346a819d900000000000ae988 XMM05=a48296ff542e18980000000000135088 XMM06=4fda316b135da52b0000000000133e78 XMM07=fb795ef6d65770560000000000124480 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000