syzkaller login: [ 53.914068] BUG: Bad rss-counter state mm:00000000cb750f1e type:MM_FILEPAGES val:33 [ 53.915360] BUG: Bad rss-counter state mm:00000000cb750f1e type:MM_ANONPAGES val:22 [ 54.098663] ================================================================== [ 54.099963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.101053] Read of size 8 at addr ffff88800feda798 by task sshd/219 [ 54.101498] [ 54.101624] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.102119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.102688] Call Trace: [ 54.102870] [ 54.103034] dump_stack_lvl+0x91/0xf0 [ 54.103314] print_report+0xcc/0x620 [ 54.103591] ? __virt_addr_valid+0x102/0x340 [ 54.103907] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.104260] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.104611] kasan_report+0xbe/0xf0 [ 54.104907] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.105270] vma_interval_tree_remove+0xc75/0xec0 [ 54.105615] vma_prepare+0xc54/0x11a0 [ 54.105891] __split_vma+0x5af/0x950 [ 54.106162] ? __pfx___split_vma+0x10/0x10 [ 54.106464] ? find_held_lock+0x2c/0x110 [ 54.106762] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.107082] ? lock_is_held_type+0x9f/0x120 [ 54.107390] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.107736] ? mtree_range_walk+0x632/0x900 [ 54.108050] ? mas_walk+0x5c7/0x7c0 [ 54.108328] do_vmi_munmap+0x1f1/0x2b0 [ 54.108621] mmap_region+0x1f9/0x2660 [ 54.108917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.109237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.109676] ? __pfx_lock_acquire+0x10/0x10 [ 54.109998] ? __pfx_mmap_region+0x10/0x10 [ 54.110315] ? security_mmap_addr+0x7d/0xa0 [ 54.110634] ? get_unmapped_area+0x1f5/0x3f0 [ 54.110968] do_mmap+0x854/0xf00 [ 54.111235] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.111531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.111872] ksys_mmap_pgoff+0x3af/0x500 [ 54.112186] do_syscall_64+0x3f/0x90 [ 54.112473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.112864] RIP: 0033:0x7f5447732d82 [ 54.113141] 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 [ 54.114423] RSP: 002b:00007fff24ef6e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.114967] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5447732d82 [ 54.115479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5446b6c000 [ 54.115977] RBP: 00007f5446b6c000 R08: 0000000000000009 R09: 0000000000001000 [ 54.116492] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f338aadf70 [ 54.117010] R13: 00007fff24ef6eb0 R14: 00007fff24ef6ee0 R15: 00007fff24ef7240 [ 54.117528] [ 54.117703] [ 54.117830] Allocated by task 212: [ 54.118095] kasan_save_stack+0x22/0x50 [ 54.118397] kasan_set_track+0x25/0x30 [ 54.118691] __kasan_slab_alloc+0x59/0x70 [ 54.119003] kmem_cache_alloc+0x16b/0x370 [ 54.119307] vm_area_dup+0x20/0x160 [ 54.119579] __split_vma+0x170/0x950 [ 54.119863] split_vma+0xc6/0x110 [ 54.120127] mprotect_fixup+0x8d2/0xb30 [ 54.120422] do_mprotect_pkey+0x87e/0xd40 [ 54.120734] __x64_sys_mprotect+0x78/0xc0 [ 54.121049] do_syscall_64+0x3f/0x90 [ 54.121337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.121730] [ 54.121860] Freed by task 19: [ 54.122092] kasan_save_stack+0x22/0x50 [ 54.122390] kasan_set_track+0x25/0x30 [ 54.122681] kasan_save_free_info+0x2b/0x50 [ 54.123002] __kasan_slab_free+0x10a/0x190 [ 54.123316] kmem_cache_free+0x10d/0x4d0 [ 54.123620] rcu_core+0x8c8/0x2860 [ 54.123893] __do_softirq+0x1b7/0x7d4 [ 54.124180] [ 54.124307] Last potentially related work creation: [ 54.124663] kasan_save_stack+0x22/0x50 [ 54.124976] __kasan_record_aux_stack+0x8e/0xa0 [ 54.125310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.125693] remove_vma+0x139/0x170 [ 54.125963] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.126296] do_vmi_munmap+0x1f1/0x2b0 [ 54.126590] __vm_munmap+0x138/0x3a0 [ 54.126871] __x64_sys_munmap+0x59/0x80 [ 54.127170] do_syscall_64+0x3f/0x90 [ 54.127455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.127839] [ 54.127969] The buggy address belongs to the object at ffff88800feda740 [ 54.127969] which belongs to the cache vm_area_struct of size 168 [ 54.128864] The buggy address is located 88 bytes inside of [ 54.128864] freed 168-byte region [ffff88800feda740, ffff88800feda7e8) [ 54.129705] [ 54.129832] The buggy address belongs to the physical page: [ 54.130236] page:00000000deca0a69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeda [ 54.130888] memcg:ffff888016b84501 [ 54.131146] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.131531] page_type: 0xffffffff() [ 54.131797] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.132346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b84501 [ 54.132900] page dumped because: kasan: bad access detected [ 54.133296] [ 54.133423] Memory state around the buggy address: [ 54.133773] ffff88800feda680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.134285] ffff88800feda700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 54.134803] >ffff88800feda780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 54.135306] ^ [ 54.135603] ffff88800feda800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 54.136155] ffff88800feda880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 54.136674] ================================================================== [ 54.137233] Disabling lock debugging due to kernel taint [ 56.020578] BUG: Bad rss-counter state mm:000000007dbb84a3 type:MM_FILEPAGES val:33 [ 56.021584] BUG: Bad rss-counter state mm:000000007dbb84a3 type:MM_ANONPAGES val:22 [ 56.644351] BUG: Bad rss-counter state mm:00000000418fd109 type:MM_FILEPAGES val:33 [ 56.645531] BUG: Bad rss-counter state mm:00000000418fd109 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26443' (ECDSA) to the list of known hosts. 2023/06/20 07:51:41 fuzzer started 2023/06/20 07:51:42 dialing manager at localhost:44161 2023/06/20 07:51:42 checking machine... 2023/06/20 07:51:42 checking revisions... [ 57.303183] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:51:42 testing simple program... [ 57.344021] cgroup: Unknown subsys name 'net' [ 57.408657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:51:26 Registers: info registers vcpu 0 RAX=1ffffffff0bb22a9 RBX=ffffffff85d91548 RCX=ffffffff81130398 RDX=0000000000000000 RSI=ffffffff860965c4 RDI=ffffffff85d91524 RBP=ffffffff85d91544 RSP=ffff88806ce099e0 R8 =ffffffff860965c4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006054 R12=ffffffff85d9154c R13=ffffffff85d91524 R14=ffffffff85d91540 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007fa238f64700 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=00007fff4d247cb8 CR3=000000000ccae000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36343733332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363437 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015eafa48 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888015eafa38 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888015eafbc0 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e47 RFL=00000282 [--S----] 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 00007f11a9791900 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=00007f11a9d48618 CR3=0000000019f70000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000