syzkaller login: [ 37.032534] BUG: Bad rss-counter state mm:0000000005ff8a54 type:MM_FILEPAGES val:33 [ 37.033883] BUG: Bad rss-counter state mm:0000000005ff8a54 type:MM_ANONPAGES val:22 [ 37.063944] ================================================================== [ 37.064787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.065629] Read of size 8 at addr ffff8880166ed880 by task sshd/221 [ 37.066338] [ 37.066524] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.067346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.068195] Call Trace: [ 37.068465] [ 37.068773] dump_stack_lvl+0x91/0xf0 [ 37.069146] print_report+0xcc/0x620 [ 37.069635] ? __virt_addr_valid+0x102/0x340 [ 37.070095] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.070618] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.071183] kasan_report+0xbe/0xf0 [ 37.071590] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.072122] vma_interval_tree_remove+0xc75/0xec0 [ 37.072685] vma_prepare+0xc54/0x11a0 [ 37.073057] __split_vma+0x5af/0x950 [ 37.073444] ? __pfx___split_vma+0x10/0x10 [ 37.073761] ? find_held_lock+0x2c/0x110 [ 37.074147] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.074574] ? lock_is_held_type+0x9f/0x120 [ 37.074946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.075375] ? mtree_range_walk+0x632/0x900 [ 37.075734] ? mas_walk+0x5c7/0x7c0 [ 37.076097] do_vmi_munmap+0x1f1/0x2b0 [ 37.076426] mmap_region+0x1f9/0x2660 [ 37.076815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.077124] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.077552] ? __pfx_lock_acquire+0x10/0x10 [ 37.077875] ? __pfx_mmap_region+0x10/0x10 [ 37.078185] ? security_mmap_addr+0x7d/0xa0 [ 37.078508] ? get_unmapped_area+0x1f5/0x3f0 [ 37.078847] do_mmap+0x854/0xf00 [ 37.079110] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.079407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.079744] ksys_mmap_pgoff+0x3af/0x500 [ 37.080050] do_syscall_64+0x3f/0x90 [ 37.080336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.080738] RIP: 0033:0x7f8961bb2d82 [ 37.081017] 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 [ 37.082330] RSP: 002b:00007ffe094943c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.082888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8961bb2d82 [ 37.083388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8960fec000 [ 37.083904] RBP: 00007f8960fec000 R08: 0000000000000009 R09: 0000000000001000 [ 37.084419] R10: 0000000000000812 R11: 0000000000000206 R12: 000056448f99cec0 [ 37.084940] R13: 00007ffe094943e0 R14: 00007ffe09494410 R15: 00007ffe09494770 [ 37.085450] [ 37.085623] [ 37.085751] Allocated by task 214: [ 37.086012] kasan_save_stack+0x22/0x50 [ 37.086311] kasan_set_track+0x25/0x30 [ 37.086605] __kasan_slab_alloc+0x59/0x70 [ 37.086914] kmem_cache_alloc+0x16b/0x370 [ 37.087224] vm_area_dup+0x20/0x160 [ 37.087488] __split_vma+0x170/0x950 [ 37.087770] split_vma+0xc6/0x110 [ 37.088039] mprotect_fixup+0x8d2/0xb30 [ 37.088333] do_mprotect_pkey+0x87e/0xd40 [ 37.088651] __x64_sys_mprotect+0x78/0xc0 [ 37.088971] do_syscall_64+0x3f/0x90 [ 37.089257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.089649] [ 37.089782] Freed by task 204: [ 37.090025] kasan_save_stack+0x22/0x50 [ 37.090332] kasan_set_track+0x25/0x30 [ 37.090629] kasan_save_free_info+0x2b/0x50 [ 37.090946] __kasan_slab_free+0x10a/0x190 [ 37.091263] kmem_cache_free+0x10d/0x4d0 [ 37.091557] rcu_core+0x8c8/0x2860 [ 37.091830] __do_softirq+0x1b7/0x7d4 [ 37.092110] [ 37.092242] Last potentially related work creation: [ 37.092602] kasan_save_stack+0x22/0x50 [ 37.092925] __kasan_record_aux_stack+0x8e/0xa0 [ 37.093262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.093654] remove_vma+0x139/0x170 [ 37.093924] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.094267] do_vmi_munmap+0x1f1/0x2b0 [ 37.094554] __vm_munmap+0x138/0x3a0 [ 37.094834] __x64_sys_munmap+0x59/0x80 [ 37.095124] do_syscall_64+0x3f/0x90 [ 37.095405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.095794] [ 37.095922] The buggy address belongs to the object at ffff8880166ed828 [ 37.095922] which belongs to the cache vm_area_struct of size 168 [ 37.096837] The buggy address is located 88 bytes inside of [ 37.096837] freed 168-byte region [ffff8880166ed828, ffff8880166ed8d0) [ 37.097691] [ 37.097819] The buggy address belongs to the physical page: [ 37.098222] page:00000000e89b59bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166ed [ 37.098875] memcg:ffff88800e4f0d01 [ 37.099132] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.099513] page_type: 0xffffffff() [ 37.099776] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.100335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4f0d01 [ 37.100886] page dumped because: kasan: bad access detected [ 37.101293] [ 37.101421] Memory state around the buggy address: [ 37.101773] ffff8880166ed780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 37.102298] ffff8880166ed800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.102821] >ffff8880166ed880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.103334] ^ [ 37.103572] ffff8880166ed900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.104096] ffff8880166ed980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 37.104612] ================================================================== [ 37.105220] Disabling lock debugging due to kernel taint [ 40.129107] BUG: Bad rss-counter state mm:000000004a2865ce type:MM_FILEPAGES val:33 [ 40.130131] BUG: Bad rss-counter state mm:000000004a2865ce type:MM_ANONPAGES val:22 [ 40.605509] BUG: Bad rss-counter state mm:00000000d6de1024 type:MM_FILEPAGES val:33 [ 40.606713] BUG: Bad rss-counter state mm:00000000d6de1024 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37504' (ECDSA) to the list of known hosts. 2023/06/19 18:24:22 fuzzer started 2023/06/19 18:24:22 dialing manager at localhost:44161 2023/06/19 18:24:22 checking machine... 2023/06/19 18:24:22 checking revisions... [ 41.360707] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:24:22 testing simple program... [ 41.415554] cgroup: Unknown subsys name 'net' [ 41.456358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:24:15 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff888015bd51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801826f470 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=1ffff1100304df1d RIP=ffffffff814c01e1 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 00007f1a6b348700 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=00007f7d2ff31dd0 CR3=000000000ead8000 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=63736964203a31313a36373130362074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363731 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=0000000080010000 RBX=ffffffff813fc4c0 RCX=ffffffff813c03a6 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf2ba08 RSP=ffff88806cf09e40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff814c01d0 RFL=00000046 [---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 00007ffaeeb3e900 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=00007ffd7fcb6000 CR3=000000000c582000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000