syzkaller login: [ 30.447599] BUG: Bad rss-counter state mm:0000000034b1bae6 type:MM_FILEPAGES val:33 [ 30.448801] BUG: Bad rss-counter state mm:0000000034b1bae6 type:MM_ANONPAGES val:22 [ 30.489497] ================================================================== [ 30.490573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.491676] Read of size 8 at addr ffff888019ba8798 by task sshd/219 [ 30.492551] [ 30.492668] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.493129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.493657] Call Trace: [ 30.493830] [ 30.493983] dump_stack_lvl+0x91/0xf0 [ 30.494262] print_report+0xcc/0x620 [ 30.494536] ? __virt_addr_valid+0x102/0x340 [ 30.494834] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.495164] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.495499] kasan_report+0xbe/0xf0 [ 30.495776] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.496136] vma_interval_tree_remove+0xc75/0xec0 [ 30.496491] vma_prepare+0xc54/0x11a0 [ 30.496774] __split_vma+0x5af/0x950 [ 30.497033] ? __pfx___split_vma+0x10/0x10 [ 30.497345] ? find_held_lock+0x2c/0x110 [ 30.497648] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.497984] ? lock_is_held_type+0x9f/0x120 [ 30.498283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.498617] ? mtree_range_walk+0x632/0x900 [ 30.498929] ? mas_walk+0x5c7/0x7c0 [ 30.499193] do_vmi_munmap+0x1f1/0x2b0 [ 30.499477] mmap_region+0x1f9/0x2660 [ 30.499745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.500033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.500438] ? __pfx_lock_acquire+0x10/0x10 [ 30.500735] ? __pfx_mmap_region+0x10/0x10 [ 30.501035] ? security_mmap_addr+0x7d/0xa0 [ 30.501331] ? get_unmapped_area+0x1f5/0x3f0 [ 30.501639] do_mmap+0x854/0xf00 [ 30.501890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.502167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.502491] ksys_mmap_pgoff+0x3af/0x500 [ 30.502773] do_syscall_64+0x3f/0x90 [ 30.503041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503407] RIP: 0033:0x7f9069863d82 [ 30.503662] 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 [ 30.504857] RSP: 002b:00007ffc10811708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.505362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9069863d82 [ 30.505837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9068c9d000 [ 30.506315] RBP: 00007f9068c9d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.506800] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563fa45df70 [ 30.507276] R13: 00007ffc10811720 R14: 00007ffc10811750 R15: 00007ffc10811ab0 [ 30.507754] [ 30.507924] [ 30.508044] Allocated by task 212: [ 30.508294] kasan_save_stack+0x22/0x50 [ 30.508571] kasan_set_track+0x25/0x30 [ 30.508846] __kasan_slab_alloc+0x59/0x70 [ 30.509141] kmem_cache_alloc+0x16b/0x370 [ 30.509431] vm_area_dup+0x20/0x160 [ 30.509686] __split_vma+0x170/0x950 [ 30.509945] split_vma+0xc6/0x110 [ 30.510193] mprotect_fixup+0x8d2/0xb30 [ 30.510480] do_mprotect_pkey+0x87e/0xd40 [ 30.510769] __x64_sys_mprotect+0x78/0xc0 [ 30.511058] do_syscall_64+0x3f/0x90 [ 30.511326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.511685] [ 30.511804] Freed by task 19: [ 30.512026] kasan_save_stack+0x22/0x50 [ 30.512309] kasan_set_track+0x25/0x30 [ 30.512580] kasan_save_free_info+0x2b/0x50 [ 30.512885] __kasan_slab_free+0x10a/0x190 [ 30.513184] kmem_cache_free+0x10d/0x4d0 [ 30.513464] rcu_core+0x8c8/0x2860 [ 30.513720] __do_softirq+0x1b7/0x7d4 [ 30.513997] [ 30.514116] Last potentially related work creation: [ 30.514453] kasan_save_stack+0x22/0x50 [ 30.514737] __kasan_record_aux_stack+0x8e/0xa0 [ 30.515054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.515413] remove_vma+0x139/0x170 [ 30.515663] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.515984] do_vmi_munmap+0x1f1/0x2b0 [ 30.516256] __vm_munmap+0x138/0x3a0 [ 30.516525] __x64_sys_munmap+0x59/0x80 [ 30.516805] do_syscall_64+0x3f/0x90 [ 30.517070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.517427] [ 30.517549] The buggy address belongs to the object at ffff888019ba8740 [ 30.517549] which belongs to the cache vm_area_struct of size 168 [ 30.518382] The buggy address is located 88 bytes inside of [ 30.518382] freed 168-byte region [ffff888019ba8740, ffff888019ba87e8) [ 30.519165] [ 30.519288] The buggy address belongs to the physical page: [ 30.519653] page:000000004bf92bf5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ba8 [ 30.520283] memcg:ffff8880198f5b01 [ 30.520528] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.520889] page_type: 0xffffffff() [ 30.521141] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.521695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198f5b01 [ 30.522240] page dumped because: kasan: bad access detected [ 30.522624] [ 30.522743] Memory state around the buggy address: [ 30.523065] ffff888019ba8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.523529] ffff888019ba8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.523996] >ffff888019ba8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.524459] ^ [ 30.524737] ffff888019ba8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.525199] ffff888019ba8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.525670] ================================================================== [ 30.526222] Disabling lock debugging due to kernel taint [ 33.254803] BUG: Bad rss-counter state mm:00000000640b1422 type:MM_FILEPAGES val:33 [ 33.255451] BUG: Bad rss-counter state mm:00000000640b1422 type:MM_ANONPAGES val:22 [ 33.683821] BUG: Bad rss-counter state mm:000000007b5979eb type:MM_FILEPAGES val:33 [ 33.684446] BUG: Bad rss-counter state mm:000000007b5979eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4916' (ECDSA) to the list of known hosts. 2023/06/21 05:21:12 fuzzer started 2023/06/21 05:21:12 dialing manager at localhost:36067 2023/06/21 05:21:12 checking machine... 2023/06/21 05:21:12 checking revisions... [ 34.321590] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:21:12 testing simple program... [ 34.362333] cgroup: Unknown subsys name 'net' [ 34.415731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:21:11 Registers: info registers vcpu 0 RAX=1ffffffff0bbfca3 RBX=ffffffff85dfe518 RCX=ffffffff8180effd RDX=0000000000000000 RSI=ffffffff861395f4 RDI=ffffffff85dfe50c RBP=ffffffff85dfe50c RSP=ffff88800e76f468 R8 =ffffffff861395f4 R9 =ffff88800e76f560 R10=0000000000038001 R11=0000000000020ed2 R12=ffffffff85dfe528 R13=ffffffff85dfe50c R14=ffffffff85dfe50c 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 00007fdcca0f5700 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=00007f8e7a712bf0 CR3=0000000010076000 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=63736964203a31313a30303433332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303034 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=0000000000000000 RBX=0000000000000000 RCX=ffffffff810ac4e5 RDX=ffff8880195b1b40 RSI=0000000000000008 RDI=ffff8880195b1b40 RBP=ffff8880195b1b40 RSP=ffff888019987ed0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888019987f58 R13=0000000000000000 R14=00007f2c126ec008 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000093 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2c12722900 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=00007f2c126ec008 CR3=00000000180da000 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=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