syzkaller login: [ 38.738314] BUG: Bad rss-counter state mm:000000005219a6fe type:MM_FILEPAGES val:33 [ 38.739534] BUG: Bad rss-counter state mm:000000005219a6fe type:MM_ANONPAGES val:22 [ 38.879214] ================================================================== [ 38.880302] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881442] Read of size 8 at addr ffff8880169ee228 by task sshd/219 [ 38.882482] [ 38.882746] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884982] Call Trace: [ 38.885311] <TASK> [ 38.885606] dump_stack_lvl+0x91/0xf0 [ 38.886109] print_report+0xcc/0x620 [ 38.886613] ? __virt_addr_valid+0x102/0x340 [ 38.887187] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887815] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888438] kasan_report+0xbe/0xf0 [ 38.888930] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889559] vma_interval_tree_remove+0xc75/0xec0 [ 38.890168] vma_prepare+0xc54/0x11a0 [ 38.890659] __split_vma+0x5af/0x950 [ 38.891136] ? __pfx___split_vma+0x10/0x10 [ 38.891671] ? find_held_lock+0x2c/0x110 [ 38.892201] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.892777] ? lock_is_held_type+0x9f/0x120 [ 38.893321] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893924] ? mtree_range_walk+0x632/0x900 [ 38.894486] ? mas_walk+0x5c7/0x7c0 [ 38.894959] do_vmi_munmap+0x1f1/0x2b0 [ 38.895448] mmap_region+0x1f9/0x2660 [ 38.895936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897185] ? __pfx_lock_acquire+0x10/0x10 [ 38.897720] ? __pfx_mmap_region+0x10/0x10 [ 38.898252] ? security_mmap_addr+0x7d/0xa0 [ 38.898783] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899332] do_mmap+0x854/0xf00 [ 38.899773] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900839] ksys_mmap_pgoff+0x3af/0x500 [ 38.901351] do_syscall_64+0x3f/0x90 [ 38.901828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902475] RIP: 0033:0x7efc1edacd82 [ 38.902934] 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 [ 38.905064] RSP: 002b:00007fff0f78ef68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905960] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc1edacd82 [ 38.906803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc1e1e6000 [ 38.907647] RBP: 00007efc1e1e6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.908489] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581f2406f70 [ 38.909342] R13: 00007fff0f78ef80 R14: 00007fff0f78efb0 R15: 00007fff0f78f310 [ 38.910213] </TASK> [ 38.910507] [ 38.910724] Allocated by task 212: [ 38.911158] kasan_save_stack+0x22/0x50 [ 38.911659] kasan_set_track+0x25/0x30 [ 38.912153] __kasan_slab_alloc+0x59/0x70 [ 38.912697] kmem_cache_alloc+0x16b/0x370 [ 38.913223] vm_area_dup+0x20/0x160 [ 38.913686] __split_vma+0x170/0x950 [ 38.914160] split_vma+0xc6/0x110 [ 38.914609] mprotect_fixup+0x8d2/0xb30 [ 38.915117] do_mprotect_pkey+0x87e/0xd40 [ 38.915638] __x64_sys_mprotect+0x78/0xc0 [ 38.916158] do_syscall_64+0x3f/0x90 [ 38.916638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917283] [ 38.917500] Freed by task 212: [ 38.917890] kasan_save_stack+0x22/0x50 [ 38.918403] kasan_set_track+0x25/0x30 [ 38.918902] kasan_save_free_info+0x2b/0x50 [ 38.919436] __kasan_slab_free+0x10a/0x190 [ 38.919973] kmem_cache_free+0x10d/0x4d0 [ 38.920484] rcu_core+0x8c8/0x2860 [ 38.920942] __do_softirq+0x1b7/0x7d4 [ 38.921425] [ 38.921640] Last potentially related work creation: [ 38.922234] kasan_save_stack+0x22/0x50 [ 38.922742] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924009] remove_vma+0x139/0x170 [ 38.924471] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925040] do_vmi_munmap+0x1f1/0x2b0 [ 38.925531] __vm_munmap+0x138/0x3a0 [ 38.926000] __x64_sys_munmap+0x59/0x80 [ 38.926502] do_syscall_64+0x3f/0x90 [ 38.926979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927620] [ 38.927837] Second to last potentially related work creation: [ 38.928526] kasan_save_stack+0x22/0x50 [ 38.929057] __kasan_record_aux_stack+0x8e/0xa0 [ 38.929628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930275] remove_vma+0x139/0x170 [ 38.930725] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931291] do_vmi_munmap+0x1f1/0x2b0 [ 38.931783] __vm_munmap+0x138/0x3a0 [ 38.932248] __x64_sys_munmap+0x59/0x80 [ 38.932760] do_syscall_64+0x3f/0x90 [ 38.933240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933887] [ 38.934103] The buggy address belongs to the object at ffff8880169ee1d0 [ 38.934103] which belongs to the cache vm_area_struct of size 168 [ 38.935894] The buggy address is located 88 bytes inside of [ 38.935894] freed 168-byte region [ffff8880169ee1d0, ffff8880169ee278) [ 38.937803] [ 38.938040] The buggy address belongs to the physical page: [ 38.938747] page:000000008bf90e62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169ee [ 38.939942] memcg:ffff8880169ef001 [ 38.940395] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941144] page_type: 0xffffffff() [ 38.941611] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.942593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169ef001 [ 38.943500] page dumped because: kasan: bad access detected [ 38.944163] [ 38.944380] Memory state around the buggy address: [ 38.944979] ffff8880169ee100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945832] ffff8880169ee180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.946684] >ffff8880169ee200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.947531] ^ [ 38.948086] ffff8880169ee280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.948966] ffff8880169ee300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.949824] ================================================================== [ 38.950947] Disabling lock debugging due to kernel taint [ 41.186673] BUG: Bad rss-counter state mm:00000000f633327e type:MM_FILEPAGES val:33 [ 41.187635] BUG: Bad rss-counter state mm:00000000f633327e type:MM_ANONPAGES val:22 [ 41.661194] BUG: Bad rss-counter state mm:000000004b456821 type:MM_FILEPAGES val:33 [ 41.662201] BUG: Bad rss-counter state mm:000000004b456821 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34017' (ECDSA) to the list of known hosts. 2023/06/20 13:25:00 fuzzer started 2023/06/20 13:25:00 dialing manager at localhost:36067 2023/06/20 13:25:00 checking machine... 2023/06/20 13:25:00 checking revisions... [ 42.528573] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:25:00 testing simple program... [ 42.587430] cgroup: Unknown subsys name 'net' [ 42.638028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81621b72 RDX=dffffc0000000000 RSI=ffffffff81621b73 RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000002c9cc R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130719 RFL=00000286 [--S--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 00007fab910b2700 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=00007ffc3b664000 CR3=0000000019a7a000 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=2039353a34323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a34323a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=1ffffffff0adb095 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff11002fddf75 RSP=ffff888017eefba0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffff88800e981768 R15=ffff88800e981720 RIP=ffffffff812e00f3 RFL=00000016 [----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 00007f610c9ff900 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=00007f98a52a7ee0 CR3=000000000dd20000 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