syzkaller login: [ 35.027003] BUG: Bad rss-counter state mm:00000000df73617e type:MM_FILEPAGES val:33 [ 35.028277] BUG: Bad rss-counter state mm:00000000df73617e type:MM_ANONPAGES val:22 [ 35.076108] ================================================================== [ 35.077174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.078207] Read of size 8 at addr ffff88800c563df0 by task sshd/220 [ 35.079161] [ 35.079403] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.080471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.081592] Call Trace: [ 35.081914] [ 35.082200] dump_stack_lvl+0x91/0xf0 [ 35.082719] print_report+0xcc/0x620 [ 35.083201] ? __virt_addr_valid+0x102/0x340 [ 35.083746] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.084362] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.084972] kasan_report+0xbe/0xf0 [ 35.085443] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.086064] vma_interval_tree_remove+0xc75/0xec0 [ 35.086673] vma_prepare+0xc54/0x11a0 [ 35.087152] __split_vma+0x5af/0x950 [ 35.087622] ? __pfx___split_vma+0x10/0x10 [ 35.088152] ? find_held_lock+0x2c/0x110 [ 35.088675] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.089244] ? lock_is_held_type+0x9f/0x120 [ 35.089782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.090381] ? mtree_range_walk+0x632/0x900 [ 35.090936] ? mas_walk+0x5c7/0x7c0 [ 35.091404] do_vmi_munmap+0x1f1/0x2b0 [ 35.091896] mmap_region+0x1f9/0x2660 [ 35.092376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.092885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.093593] ? __pfx_lock_acquire+0x10/0x10 [ 35.094122] ? __pfx_mmap_region+0x10/0x10 [ 35.094666] ? security_mmap_addr+0x7d/0xa0 [ 35.095195] ? get_unmapped_area+0x1f5/0x3f0 [ 35.095745] do_mmap+0x854/0xf00 [ 35.096187] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.096681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.097238] ksys_mmap_pgoff+0x3af/0x500 [ 35.097743] do_syscall_64+0x3f/0x90 [ 35.098217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.098866] RIP: 0033:0x7f615e6cdd82 [ 35.099329] 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 [ 35.101445] RSP: 002b:00007ffd644a1ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.102338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f615e6cdd82 [ 35.103197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f615db07000 [ 35.104038] RBP: 00007f615db07000 R08: 0000000000000009 R09: 0000000000001000 [ 35.104876] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc4c982ec0 [ 35.105716] R13: 00007ffd644a1cc0 R14: 00007ffd644a1cf0 R15: 00007ffd644a2050 [ 35.106573] [ 35.106881] [ 35.107097] Allocated by task 212: [ 35.107522] kasan_save_stack+0x22/0x50 [ 35.108018] kasan_set_track+0x25/0x30 [ 35.108511] __kasan_slab_alloc+0x59/0x70 [ 35.109037] kmem_cache_alloc+0x16b/0x370 [ 35.109551] vm_area_dup+0x20/0x160 [ 35.110006] __split_vma+0x170/0x950 [ 35.110473] split_vma+0xc6/0x110 [ 35.110922] mprotect_fixup+0x8d2/0xb30 [ 35.111431] do_mprotect_pkey+0x87e/0xd40 [ 35.111947] __x64_sys_mprotect+0x78/0xc0 [ 35.112469] do_syscall_64+0x3f/0x90 [ 35.112943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.113585] [ 35.113799] Freed by task 19: [ 35.114188] kasan_save_stack+0x22/0x50 [ 35.114718] kasan_set_track+0x25/0x30 [ 35.115222] kasan_save_free_info+0x2b/0x50 [ 35.115764] __kasan_slab_free+0x10a/0x190 [ 35.116300] kmem_cache_free+0x10d/0x4d0 [ 35.116813] rcu_core+0x8c8/0x2860 [ 35.117274] __do_softirq+0x1b7/0x7d4 [ 35.117757] [ 35.117977] Last potentially related work creation: [ 35.118671] kasan_save_stack+0x22/0x50 [ 35.119204] __kasan_record_aux_stack+0x8e/0xa0 [ 35.119818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.120494] remove_vma+0x139/0x170 [ 35.120967] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.121560] do_vmi_munmap+0x1f1/0x2b0 [ 35.122070] __vm_munmap+0x138/0x3a0 [ 35.122564] __x64_sys_munmap+0x59/0x80 [ 35.123089] do_syscall_64+0x3f/0x90 [ 35.123585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.124262] [ 35.124487] The buggy address belongs to the object at ffff88800c563d98 [ 35.124487] which belongs to the cache vm_area_struct of size 168 [ 35.126019] The buggy address is located 88 bytes inside of [ 35.126019] freed 168-byte region [ffff88800c563d98, ffff88800c563e40) [ 35.127513] [ 35.127740] The buggy address belongs to the physical page: [ 35.128424] page:0000000057010cc7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc563 [ 35.129547] memcg:ffff88800b95b301 [ 35.129994] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.130665] page_type: 0xffffffff() [ 35.131140] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.132101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b95b301 [ 35.133049] page dumped because: kasan: bad access detected [ 35.133735] [ 35.133960] Memory state around the buggy address: [ 35.134561] ffff88800c563c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.135460] ffff88800c563d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.136362] >ffff88800c563d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.137255] ^ [ 35.138100] ffff88800c563e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.139010] ffff88800c563e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.139888] ================================================================== [ 35.140903] Disabling lock debugging due to kernel taint [ 37.189928] BUG: Bad rss-counter state mm:000000008a1e930e type:MM_FILEPAGES val:33 [ 37.191129] BUG: Bad rss-counter state mm:000000008a1e930e type:MM_ANONPAGES val:22 [ 37.649971] BUG: Bad rss-counter state mm:0000000020e89697 type:MM_FILEPAGES val:33 [ 37.651183] BUG: Bad rss-counter state mm:0000000020e89697 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7290' (ECDSA) to the list of known hosts. 2023/06/20 06:04:32 fuzzer started 2023/06/20 06:04:32 dialing manager at localhost:44161 2023/06/20 06:04:32 checking machine... 2023/06/20 06:04:32 checking revisions... [ 38.234913] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:04:33 testing simple program... [ 38.281160] cgroup: Unknown subsys name 'net' [ 38.319183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:04:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1356 RSI=ffffffff81ef60ea RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000397e7 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 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 00007f9ddd356900 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=00007f9ddd90b650 CR3=000000001bed8000 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=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 info registers vcpu 1 RAX=ffffffff8185ae43 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028c3f3c RSI=ffffffff8185ae43 RDI=ffff88801461fa50 RBP=ffff88801461fa20 RSP=ffff88801461f980 R8 =0000000000000001 R9 =ffff88801461f9c8 R10=0000000000038001 R11=00000000000223e2 R12=ffff88801461fa50 R13=0000000000000000 R14=ffff88800fa38000 R15=0000000000000cc0 RIP=ffffffff813ad420 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 00007fabe9086900 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=00007fabe84c0ae0 CR3=000000000f5aa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1bcdbebe23afb7e500000000000ae988 XMM05=977f92345a6dcd7f0000000000135c98 XMM06=c0441cd32bdef3b60000000000134a38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000