syzkaller login: [ 40.917816] BUG: Bad rss-counter state mm:0000000007eea9ba type:MM_FILEPAGES val:33 [ 40.919219] BUG: Bad rss-counter state mm:0000000007eea9ba type:MM_ANONPAGES val:22 [ 41.074050] ================================================================== [ 41.074976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.075912] Read of size 8 at addr ffff88800e2ca310 by task sshd/219 [ 41.076707] [ 41.076930] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.077921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.078904] Call Trace: [ 41.079225] [ 41.079511] dump_stack_lvl+0x91/0xf0 [ 41.079996] print_report+0xcc/0x620 [ 41.080492] ? __virt_addr_valid+0x102/0x340 [ 41.081049] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.081665] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.082293] kasan_report+0xbe/0xf0 [ 41.082780] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.083400] vma_interval_tree_remove+0xc75/0xec0 [ 41.084011] vma_prepare+0xc54/0x11a0 [ 41.084517] __split_vma+0x5af/0x950 [ 41.085004] ? __pfx___split_vma+0x10/0x10 [ 41.085564] ? find_held_lock+0x2c/0x110 [ 41.086081] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.086671] ? lock_is_held_type+0x9f/0x120 [ 41.087214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.087823] ? mtree_range_walk+0x632/0x900 [ 41.088379] ? mas_walk+0x5c7/0x7c0 [ 41.088879] do_vmi_munmap+0x1f1/0x2b0 [ 41.089374] mmap_region+0x1f9/0x2660 [ 41.089868] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.090385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.091106] ? __pfx_lock_acquire+0x10/0x10 [ 41.091636] ? __pfx_mmap_region+0x10/0x10 [ 41.092167] ? security_mmap_addr+0x7d/0xa0 [ 41.092711] ? get_unmapped_area+0x1f5/0x3f0 [ 41.093260] do_mmap+0x854/0xf00 [ 41.093702] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.094201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.094771] ksys_mmap_pgoff+0x3af/0x500 [ 41.095283] do_syscall_64+0x3f/0x90 [ 41.095763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.096414] RIP: 0033:0x7f0e94b21d82 [ 41.096907] 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 [ 41.099038] RSP: 002b:00007fffbc97b618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.099942] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e94b21d82 [ 41.100820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e93f5b000 [ 41.101735] RBP: 00007f0e93f5b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.102584] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4a86acb20 [ 41.103441] R13: 00007fffbc97b630 R14: 00007fffbc97b660 R15: 00007fffbc97b9c0 [ 41.104292] [ 41.104590] [ 41.104809] Allocated by task 212: [ 41.105254] kasan_save_stack+0x22/0x50 [ 41.105777] kasan_set_track+0x25/0x30 [ 41.106272] __kasan_slab_alloc+0x59/0x70 [ 41.106797] kmem_cache_alloc+0x16b/0x370 [ 41.107316] vm_area_dup+0x20/0x160 [ 41.107775] __split_vma+0x170/0x950 [ 41.108244] split_vma+0xc6/0x110 [ 41.108718] mprotect_fixup+0x8d2/0xb30 [ 41.109237] do_mprotect_pkey+0x87e/0xd40 [ 41.109767] __x64_sys_mprotect+0x78/0xc0 [ 41.110304] do_syscall_64+0x3f/0x90 [ 41.110791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.111434] [ 41.111655] Freed by task 212: [ 41.112043] kasan_save_stack+0x22/0x50 [ 41.112554] kasan_set_track+0x25/0x30 [ 41.113055] kasan_save_free_info+0x2b/0x50 [ 41.113591] __kasan_slab_free+0x10a/0x190 [ 41.114123] kmem_cache_free+0x10d/0x4d0 [ 41.114634] rcu_core+0x8c8/0x2860 [ 41.115076] __do_softirq+0x1b7/0x7d4 [ 41.115552] [ 41.115772] Last potentially related work creation: [ 41.116362] kasan_save_stack+0x22/0x50 [ 41.116883] __kasan_record_aux_stack+0x8e/0xa0 [ 41.117464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.118114] remove_vma+0x139/0x170 [ 41.118565] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.119124] do_vmi_munmap+0x1f1/0x2b0 [ 41.119612] __vm_munmap+0x138/0x3a0 [ 41.120080] __x64_sys_munmap+0x59/0x80 [ 41.120588] do_syscall_64+0x3f/0x90 [ 41.121069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.121712] [ 41.121928] The buggy address belongs to the object at ffff88800e2ca2b8 [ 41.121928] which belongs to the cache vm_area_struct of size 168 [ 41.123400] The buggy address is located 88 bytes inside of [ 41.123400] freed 168-byte region [ffff88800e2ca2b8, ffff88800e2ca360) [ 41.124832] [ 41.125049] The buggy address belongs to the physical page: [ 41.125717] page:00000000b4ebb5e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ca [ 41.126799] memcg:ffff88800d96e401 [ 41.127222] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.127871] page_type: 0xffffffff() [ 41.128325] raw: 0100000000000200 ffff88800879fc80 ffffea00003650c0 0000000000000008 [ 41.129261] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d96e401 [ 41.130176] page dumped because: kasan: bad access detected [ 41.130833] [ 41.131053] Memory state around the buggy address: [ 41.131628] ffff88800e2ca200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.132495] ffff88800e2ca280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.133353] >ffff88800e2ca300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.134196] ^ [ 41.134661] ffff88800e2ca380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.135517] ffff88800e2ca400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.136371] ================================================================== [ 41.137382] Disabling lock debugging due to kernel taint [ 42.687896] BUG: Bad rss-counter state mm:000000009b627175 type:MM_FILEPAGES val:33 [ 42.688919] BUG: Bad rss-counter state mm:000000009b627175 type:MM_ANONPAGES val:22 [ 43.121690] BUG: Bad rss-counter state mm:00000000bd46ba3c type:MM_FILEPAGES val:33 [ 43.122876] BUG: Bad rss-counter state mm:00000000bd46ba3c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63801' (ECDSA) to the list of known hosts. 2023/06/19 15:53:21 fuzzer started 2023/06/19 15:53:22 dialing manager at localhost:44161 2023/06/19 15:53:22 checking machine... 2023/06/19 15:53:22 checking revisions... [ 43.833719] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:53:22 testing simple program... [ 43.894232] cgroup: Unknown subsys name 'net' [ 43.952566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:19 Registers: info registers vcpu 0 RAX=ffffffff8180995d RBX=0000000000000004 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000d RDI=ffff88800c6bf9b0 RBP=dffffc0000000000 RSP=ffff88800c6bf900 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000d R13=0000000000000000 R14=ffff88800c6bf990 R15=ffff88800f024080 RIP=ffffffff813ad5f9 RFL=00000287 [--S--PC] 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 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=00007f055aabc160 CR3=000000000fe5a000 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=2031323a33353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff888015b8b680 RSI=ffffffff844b8ed7 RDI=ffff88800a11ca88 RBP=000000000000030f RSP=ffff88800f1bf178 R8 =0000000000000000 R9 =000000000000000e R10=000000000000000c R11=0000000000000000 R12=ffff88800f1bf768 R13=ffff88800f1bf9c8 R14=dffffc0000000000 R15=0000000000000004 RIP=ffffffff844b8f28 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 00007fcfd6d4e900 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=00007fcfd6d13008 CR3=0000000013a1e000 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