syzkaller login: [ 31.342316] BUG: Bad rss-counter state mm:000000003829ca46 type:MM_FILEPAGES val:33 [ 31.343707] BUG: Bad rss-counter state mm:000000003829ca46 type:MM_ANONPAGES val:22 [ 31.488887] ================================================================== [ 31.489593] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.490229] Read of size 8 at addr ffff888019f2e310 by task sshd/222 [ 31.490712] [ 31.490845] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.491390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.492071] Call Trace: [ 31.492290] [ 31.492485] dump_stack_lvl+0x91/0xf0 [ 31.492809] print_report+0xcc/0x620 [ 31.493127] ? __virt_addr_valid+0x102/0x340 [ 31.493842] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.494298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.494719] kasan_report+0xbe/0xf0 [ 31.495014] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.495418] vma_interval_tree_remove+0xc75/0xec0 [ 31.495877] vma_prepare+0xc54/0x11a0 [ 31.496220] __split_vma+0x5af/0x950 [ 31.496534] ? __pfx___split_vma+0x10/0x10 [ 31.496896] ? find_held_lock+0x2c/0x110 [ 31.497257] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.497634] ? lock_is_held_type+0x9f/0x120 [ 31.497989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.498418] ? mtree_range_walk+0x632/0x900 [ 31.498778] ? mas_walk+0x5c7/0x7c0 [ 31.499083] do_vmi_munmap+0x1f1/0x2b0 [ 31.499406] mmap_region+0x1f9/0x2660 [ 31.499777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.500132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.500573] ? __pfx_lock_acquire+0x10/0x10 [ 31.500932] ? __pfx_mmap_region+0x10/0x10 [ 31.501288] ? security_mmap_addr+0x7d/0xa0 [ 31.501632] ? get_unmapped_area+0x1f5/0x3f0 [ 31.502006] do_mmap+0x854/0xf00 [ 31.502300] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.502637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.503030] ksys_mmap_pgoff+0x3af/0x500 [ 31.503371] do_syscall_64+0x3f/0x90 [ 31.503699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.504177] RIP: 0033:0x7fb4c89fdd82 [ 31.504500] 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 [ 31.505885] RSP: 002b:00007ffde0dc9808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.506469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4c89fdd82 [ 31.507026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4c7e37000 [ 31.507578] RBP: 00007fb4c7e37000 R08: 0000000000000009 R09: 0000000000001000 [ 31.508173] R10: 0000000000000812 R11: 0000000000000206 R12: 000055827a2a8ec0 [ 31.508706] R13: 00007ffde0dc9820 R14: 00007ffde0dc9850 R15: 00007ffde0dc9bb0 [ 31.509251] [ 31.509451] [ 31.509600] Allocated by task 213: [ 31.509899] kasan_save_stack+0x22/0x50 [ 31.510268] kasan_set_track+0x25/0x30 [ 31.510585] __kasan_slab_alloc+0x59/0x70 [ 31.510912] kmem_cache_alloc+0x16b/0x370 [ 31.511256] vm_area_dup+0x20/0x160 [ 31.511549] __split_vma+0x170/0x950 [ 31.511893] split_vma+0xc6/0x110 [ 31.512206] mprotect_fixup+0x8d2/0xb30 [ 31.512575] do_mprotect_pkey+0x87e/0xd40 [ 31.512949] __x64_sys_mprotect+0x78/0xc0 [ 31.513331] do_syscall_64+0x3f/0x90 [ 31.513665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.514085] [ 31.514228] Freed by task 13: [ 31.514471] kasan_save_stack+0x22/0x50 [ 31.514807] kasan_set_track+0x25/0x30 [ 31.515149] kasan_save_free_info+0x2b/0x50 [ 31.515491] __kasan_slab_free+0x10a/0x190 [ 31.515888] kmem_cache_free+0x10d/0x4d0 [ 31.516231] rcu_core+0x8c8/0x2860 [ 31.516549] __do_softirq+0x1b7/0x7d4 [ 31.516901] [ 31.517053] Last potentially related work creation: [ 31.517460] kasan_save_stack+0x22/0x50 [ 31.517782] __kasan_record_aux_stack+0x8e/0xa0 [ 31.518172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.518594] remove_vma+0x139/0x170 [ 31.518906] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.519276] do_vmi_munmap+0x1f1/0x2b0 [ 31.519587] __vm_munmap+0x138/0x3a0 [ 31.519917] __x64_sys_munmap+0x59/0x80 [ 31.520252] do_syscall_64+0x3f/0x90 [ 31.520560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.520975] [ 31.521126] The buggy address belongs to the object at ffff888019f2e2b8 [ 31.521126] which belongs to the cache vm_area_struct of size 168 [ 31.522166] The buggy address is located 88 bytes inside of [ 31.522166] freed 168-byte region [ffff888019f2e2b8, ffff888019f2e360) [ 31.523110] [ 31.523253] The buggy address belongs to the physical page: [ 31.523687] page:00000000c4ff2ccf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f2e [ 31.524489] memcg:ffff88800b2fcb01 [ 31.524783] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.525231] page_type: 0xffffffff() [ 31.525544] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.526147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b2fcb01 [ 31.526798] page dumped because: kasan: bad access detected [ 31.527243] [ 31.527382] Memory state around the buggy address: [ 31.527805] ffff888019f2e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.528397] ffff888019f2e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.528990] >ffff888019f2e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.529583] ^ [ 31.529897] ffff888019f2e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.530515] ffff888019f2e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.531160] ================================================================== [ 31.531932] Disabling lock debugging due to kernel taint [ 33.261404] BUG: Bad rss-counter state mm:00000000b6a2a661 type:MM_FILEPAGES val:33 [ 33.262138] BUG: Bad rss-counter state mm:00000000b6a2a661 type:MM_ANONPAGES val:22 [ 33.625025] BUG: Bad rss-counter state mm:000000003618b136 type:MM_FILEPAGES val:33 [ 33.625650] BUG: Bad rss-counter state mm:000000003618b136 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44496' (ECDSA) to the list of known hosts. 2023/06/21 09:25:53 fuzzer started 2023/06/21 09:25:53 dialing manager at localhost:36067 2023/06/21 09:25:53 checking machine... 2023/06/21 09:25:53 checking revisions... [ 34.216807] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:25:53 testing simple program... [ 34.253432] cgroup: Unknown subsys name 'net' [ 34.290112] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:25:53 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff88800c8f7400 RSI=ffffffff84e38ee0 RDI=0000000000000003 RBP=ffffffff84e38ee0 RSP=ffff88801027f0e0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=000055d003542000 R12=0000000000000003 R13=0000000000000005 R14=ffff88801027f568 R15=ffff88801027f5c8 RIP=ffffffff814c0476 RFL=00000206 [-----P-] 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 00007f40f68fb900 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=00007f40f68da020 CR3=000000000c5e4000 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=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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fd8f29e7ef0 CR3=00000000147de000 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=2033353a35323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000