syzkaller login: [ 28.902188] BUG: Bad rss-counter state mm:00000000472f5895 type:MM_FILEPAGES val:33 [ 28.903366] BUG: Bad rss-counter state mm:00000000472f5895 type:MM_ANONPAGES val:22 [ 29.072900] ================================================================== [ 29.073971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.074909] Read of size 8 at addr ffff88800c5bfb38 by task sshd/219 [ 29.075684] [ 29.075904] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.076766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.077765] Call Trace: [ 29.078095] [ 29.078386] dump_stack_lvl+0x91/0xf0 [ 29.078884] print_report+0xcc/0x620 [ 29.079378] ? __virt_addr_valid+0x102/0x340 [ 29.079932] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.080550] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.081175] kasan_report+0xbe/0xf0 [ 29.081669] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.082293] vma_interval_tree_remove+0xc75/0xec0 [ 29.082899] vma_prepare+0xc54/0x11a0 [ 29.083380] __split_vma+0x5af/0x950 [ 29.083854] ? __pfx___split_vma+0x10/0x10 [ 29.084389] ? find_held_lock+0x2c/0x110 [ 29.084915] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.085496] ? lock_is_held_type+0x9f/0x120 [ 29.086043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.086740] ? mtree_range_walk+0x632/0x900 [ 29.087301] ? mas_walk+0x5c7/0x7c0 [ 29.087780] do_vmi_munmap+0x1f1/0x2b0 [ 29.088275] mmap_region+0x1f9/0x2660 [ 29.088762] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.089282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.090016] ? __pfx_lock_acquire+0x10/0x10 [ 29.090558] ? __pfx_mmap_region+0x10/0x10 [ 29.091090] ? security_mmap_addr+0x7d/0xa0 [ 29.091632] ? get_unmapped_area+0x1f5/0x3f0 [ 29.092193] do_mmap+0x854/0xf00 [ 29.092640] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.093137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.093715] ksys_mmap_pgoff+0x3af/0x500 [ 29.094231] do_syscall_64+0x3f/0x90 [ 29.094714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.095372] RIP: 0033:0x7f83942f4d82 [ 29.095832] 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 [ 29.097987] RSP: 002b:00007ffc367feee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.098893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83942f4d82 [ 29.099740] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f839372e000 [ 29.100596] RBP: 00007f839372e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.101541] R10: 0000000000000812 R11: 0000000000000206 R12: 000055935d574f70 [ 29.102387] R13: 00007ffc367fef00 R14: 00007ffc367fef30 R15: 00007ffc367ff290 [ 29.103250] [ 29.103542] [ 29.103759] Allocated by task 212: [ 29.104189] kasan_save_stack+0x22/0x50 [ 29.104695] kasan_set_track+0x25/0x30 [ 29.105192] __kasan_slab_alloc+0x59/0x70 [ 29.105740] kmem_cache_alloc+0x16b/0x370 [ 29.106271] vm_area_dup+0x20/0x160 [ 29.106721] __split_vma+0x170/0x950 [ 29.107192] split_vma+0xc6/0x110 [ 29.107641] mprotect_fixup+0x8d2/0xb30 [ 29.108153] do_mprotect_pkey+0x87e/0xd40 [ 29.108677] __x64_sys_mprotect+0x78/0xc0 [ 29.109202] do_syscall_64+0x3f/0x90 [ 29.109693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.110353] [ 29.110572] Freed by task 212: [ 29.110960] kasan_save_stack+0x22/0x50 [ 29.111466] kasan_set_track+0x25/0x30 [ 29.111959] kasan_save_free_info+0x2b/0x50 [ 29.112504] __kasan_slab_free+0x10a/0x190 [ 29.113034] kmem_cache_free+0x10d/0x4d0 [ 29.113556] rcu_core+0x8c8/0x2860 [ 29.113999] __do_softirq+0x1b7/0x7d4 [ 29.114479] [ 29.114698] Last potentially related work creation: [ 29.115277] kasan_save_stack+0x22/0x50 [ 29.115777] __kasan_record_aux_stack+0x8e/0xa0 [ 29.116355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.116994] remove_vma+0x139/0x170 [ 29.117450] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.118007] do_vmi_munmap+0x1f1/0x2b0 [ 29.118494] __vm_munmap+0x138/0x3a0 [ 29.118955] __x64_sys_munmap+0x59/0x80 [ 29.119451] do_syscall_64+0x3f/0x90 [ 29.119926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.120562] [ 29.120775] The buggy address belongs to the object at ffff88800c5bfae0 [ 29.120775] which belongs to the cache vm_area_struct of size 168 [ 29.122253] The buggy address is located 88 bytes inside of [ 29.122253] freed 168-byte region [ffff88800c5bfae0, ffff88800c5bfb88) [ 29.123645] [ 29.123862] The buggy address belongs to the physical page: [ 29.124518] page:00000000b49b65f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5bf [ 29.125622] memcg:ffff88800f632001 [ 29.126046] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.126689] page_type: 0xffffffff() [ 29.127136] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a45c0 dead000000000002 [ 29.128053] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f632001 [ 29.128957] page dumped because: kasan: bad access detected [ 29.129632] [ 29.129851] Memory state around the buggy address: [ 29.130425] ffff88800c5bfa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.131281] ffff88800c5bfa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.132144] >ffff88800c5bfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.132992] ^ [ 29.133625] ffff88800c5bfb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.134474] ffff88800c5bfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.135333] ================================================================== [ 29.136423] Disabling lock debugging due to kernel taint [ 31.034922] BUG: Bad rss-counter state mm:000000009babf1ad type:MM_FILEPAGES val:33 [ 31.036107] BUG: Bad rss-counter state mm:000000009babf1ad type:MM_ANONPAGES val:22 [ 31.544736] BUG: Bad rss-counter state mm:000000003d8841ce type:MM_FILEPAGES val:33 [ 31.545801] BUG: Bad rss-counter state mm:000000003d8841ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6215' (ECDSA) to the list of known hosts. 2023/06/20 19:12:43 fuzzer started 2023/06/20 19:12:43 dialing manager at localhost:36067 2023/06/20 19:12:43 checking machine... 2023/06/20 19:12:43 checking revisions... [ 32.150676] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:12:44 testing simple program... [ 32.204890] cgroup: Unknown subsys name 'net' [ 32.251016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:12:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffe7d0b2ff8 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=00007f6411117510000055d361c04790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f1aff48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f1aff01 RSI=ffff88800f1aff10 RDI=ffff88800f1aff10 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000022457 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88800f1aff10 R15=ffff88806cf09a70 RIP=ffffffff81131236 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 00007f201937e900 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=00007f20199360b0 CR3=000000001698c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000