syzkaller login: [ 61.418624] BUG: Bad rss-counter state mm:000000001df163c7 type:MM_FILEPAGES val:33 [ 61.419643] BUG: Bad rss-counter state mm:000000001df163c7 type:MM_ANONPAGES val:22 [ 61.658874] ================================================================== [ 61.659792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.660739] Read of size 8 at addr ffff888016fe2310 by task sshd/220 [ 61.661519] [ 61.661740] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.662777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.663756] Call Trace: [ 61.664077] [ 61.664362] dump_stack_lvl+0x91/0xf0 [ 61.665019] print_report+0xcc/0x620 [ 61.665609] ? __virt_addr_valid+0x102/0x340 [ 61.666323] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.667085] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.667853] kasan_report+0xbe/0xf0 [ 61.668437] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.669228] vma_interval_tree_remove+0xc75/0xec0 [ 61.669997] vma_prepare+0xc54/0x11a0 [ 61.670585] __split_vma+0x5af/0x950 [ 61.671177] ? __pfx___split_vma+0x10/0x10 [ 61.671833] ? find_held_lock+0x2c/0x110 [ 61.672474] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.673201] ? lock_is_held_type+0x9f/0x120 [ 61.673872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.674626] ? mtree_range_walk+0x632/0x900 [ 61.675310] ? mas_walk+0x5c7/0x7c0 [ 61.675912] do_vmi_munmap+0x1f1/0x2b0 [ 61.676535] mmap_region+0x1f9/0x2660 [ 61.677184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.677841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.678775] ? __pfx_lock_acquire+0x10/0x10 [ 61.679370] ? __pfx_mmap_region+0x10/0x10 [ 61.679928] ? security_mmap_addr+0x7d/0xa0 [ 61.680487] ? get_unmapped_area+0x1f5/0x3f0 [ 61.681077] do_mmap+0x854/0xf00 [ 61.681535] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.682093] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.682695] ksys_mmap_pgoff+0x3af/0x500 [ 61.683386] do_syscall_64+0x3f/0x90 [ 61.684038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.684892] RIP: 0033:0x7f2f8c414d82 [ 61.685496] 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 [ 61.688372] RSP: 002b:00007fff9b5e7c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.689496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f8c414d82 [ 61.690439] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f8b84e000 [ 61.691329] RBP: 00007f2f8b84e000 R08: 0000000000000009 R09: 0000000000001000 [ 61.692210] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e29c994b20 [ 61.693113] R13: 00007fff9b5e7c80 R14: 00007fff9b5e7cb0 R15: 00007fff9b5e8010 [ 61.694022] [ 61.694327] [ 61.694545] Allocated by task 213: [ 61.695019] kasan_save_stack+0x22/0x50 [ 61.695542] kasan_set_track+0x25/0x30 [ 61.696069] __kasan_slab_alloc+0x59/0x70 [ 61.696615] kmem_cache_alloc+0x16b/0x370 [ 61.697164] vm_area_dup+0x20/0x160 [ 61.697634] __split_vma+0x170/0x950 [ 61.698151] split_vma+0xc6/0x110 [ 61.698607] mprotect_fixup+0x8d2/0xb30 [ 61.699157] do_mprotect_pkey+0x87e/0xd40 [ 61.699700] __x64_sys_mprotect+0x78/0xc0 [ 61.700252] do_syscall_64+0x3f/0x90 [ 61.700737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.701408] [ 61.701635] Freed by task 213: [ 61.702073] kasan_save_stack+0x22/0x50 [ 61.702596] kasan_set_track+0x25/0x30 [ 61.703147] kasan_save_free_info+0x2b/0x50 [ 61.703766] __kasan_slab_free+0x10a/0x190 [ 61.704330] kmem_cache_free+0x10d/0x4d0 [ 61.704867] rcu_core+0x8c8/0x2860 [ 61.705322] __do_softirq+0x1b7/0x7d4 [ 61.705829] [ 61.706083] Last potentially related work creation: [ 61.706697] kasan_save_stack+0x22/0x50 [ 61.707258] __kasan_record_aux_stack+0x8e/0xa0 [ 61.707884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.708547] remove_vma+0x139/0x170 [ 61.709089] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.709818] do_vmi_munmap+0x1f1/0x2b0 [ 61.710411] __vm_munmap+0x138/0x3a0 [ 61.710904] __x64_sys_munmap+0x59/0x80 [ 61.711415] do_syscall_64+0x3f/0x90 [ 61.711928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.712609] [ 61.712846] The buggy address belongs to the object at ffff888016fe22b8 [ 61.712846] which belongs to the cache vm_area_struct of size 168 [ 61.714370] The buggy address is located 88 bytes inside of [ 61.714370] freed 168-byte region [ffff888016fe22b8, ffff888016fe2360) [ 61.715833] [ 61.716058] The buggy address belongs to the physical page: [ 61.716728] page:00000000bb547ea1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fe2 [ 61.717884] memcg:ffff888019e85201 [ 61.718344] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.719030] page_type: 0xffffffff() [ 61.719494] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.720450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e85201 [ 61.721388] page dumped because: kasan: bad access detected [ 61.722113] [ 61.722335] Memory state around the buggy address: [ 61.722956] ffff888016fe2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.723844] ffff888016fe2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.724717] >ffff888016fe2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.725608] ^ [ 61.726145] ffff888016fe2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.727035] ffff888016fe2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.727937] ================================================================== [ 61.729003] Disabling lock debugging due to kernel taint [ 63.730281] BUG: Bad rss-counter state mm:0000000013fed79f type:MM_FILEPAGES val:33 [ 63.731959] BUG: Bad rss-counter state mm:0000000013fed79f type:MM_ANONPAGES val:22 [ 64.169864] BUG: Bad rss-counter state mm:000000006216ddd8 type:MM_FILEPAGES val:33 [ 64.170648] BUG: Bad rss-counter state mm:000000006216ddd8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45148' (ECDSA) to the list of known hosts. 2023/06/20 10:13:34 fuzzer started 2023/06/20 10:13:34 dialing manager at localhost:44161 2023/06/20 10:13:34 checking machine... 2023/06/20 10:13:34 checking revisions... [ 64.828793] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:13:34 testing simple program... [ 64.873371] cgroup: Unknown subsys name 'net' [ 64.915978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:13:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880167d9b40 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=1ffff11002b27e6f RSP=ffff88801593f368 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff8880183d4980 RIP=ffffffff812d8689 RFL=00000246 [---Z-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 00007fdcb27e1700 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=00007f719b5ca4d0 CR3=000000000d80a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034333a3331 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343939 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=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=ffff88800ffaf9f0 RSI=0000000000000000 RDI=ffff88800ffaf6a8 RBP=ffff88800ffaf730 RSP=ffff88800ffaf698 R8 =ffffffff8613751e R9 =ffff88800ffaf6d8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800ffaf760 R13=0000000000000000 R14=ffff88800e71d1c0 R15=ffff8880084c6140 RIP=ffffffff810bd057 RFL=00000296 [--S-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 00007f3bdd194900 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=00007f3bdd173020 CR3=000000000c526000 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