syzkaller login: [ 49.653140] BUG: Bad rss-counter state mm:0000000093e504d1 type:MM_FILEPAGES val:33 [ 49.654838] BUG: Bad rss-counter state mm:0000000093e504d1 type:MM_ANONPAGES val:22 [ 49.844622] ================================================================== [ 49.845757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.846997] Read of size 8 at addr ffff888015c37228 by task sshd/221 [ 49.847858] [ 49.848096] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.849057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.850123] Call Trace: [ 49.850473] [ 49.850782] dump_stack_lvl+0x91/0xf0 [ 49.851327] print_report+0xcc/0x620 [ 49.851842] ? __virt_addr_valid+0x102/0x340 [ 49.852443] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.853116] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.853778] kasan_report+0xbe/0xf0 [ 49.854288] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.854958] vma_interval_tree_remove+0xc75/0xec0 [ 49.855625] vma_prepare+0xc54/0x11a0 [ 49.856136] __split_vma+0x5af/0x950 [ 49.856638] ? __pfx___split_vma+0x10/0x10 [ 49.857206] ? find_held_lock+0x2c/0x110 [ 49.857768] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.858377] ? lock_is_held_type+0x9f/0x120 [ 49.858960] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.859622] ? mtree_range_walk+0x632/0x900 [ 49.860213] ? mas_walk+0x5c7/0x7c0 [ 49.860720] do_vmi_munmap+0x1f1/0x2b0 [ 49.861255] mmap_region+0x1f9/0x2660 [ 49.861770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.862319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.863101] ? __pfx_lock_acquire+0x10/0x10 [ 49.863690] ? __pfx_mmap_region+0x10/0x10 [ 49.864255] ? security_mmap_addr+0x7d/0xa0 [ 49.864827] ? get_unmapped_area+0x1f5/0x3f0 [ 49.865414] do_mmap+0x854/0xf00 [ 49.865885] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.866416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.867019] ksys_mmap_pgoff+0x3af/0x500 [ 49.867572] do_syscall_64+0x3f/0x90 [ 49.868087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.868777] RIP: 0033:0x7f3c7e7f1d82 [ 49.869272] 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 [ 49.871572] RSP: 002b:00007ffc0fd393f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.872565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c7e7f1d82 [ 49.873475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c7dc2b000 [ 49.874387] RBP: 00007f3c7dc2b000 R08: 0000000000000009 R09: 0000000000001000 [ 49.875326] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c49d39af60 [ 49.876240] R13: 00007ffc0fd39410 R14: 00007ffc0fd39440 R15: 00007ffc0fd397a0 [ 49.877169] [ 49.877487] [ 49.877717] Allocated by task 214: [ 49.878173] kasan_save_stack+0x22/0x50 [ 49.878723] kasan_set_track+0x25/0x30 [ 49.879259] __kasan_slab_alloc+0x59/0x70 [ 49.879814] kmem_cache_alloc+0x16b/0x370 [ 49.880363] vm_area_dup+0x20/0x160 [ 49.880840] __split_vma+0x170/0x950 [ 49.881337] split_vma+0xc6/0x110 [ 49.881804] mprotect_fixup+0x8d2/0xb30 [ 49.882336] do_mprotect_pkey+0x87e/0xd40 [ 49.882882] __x64_sys_mprotect+0x78/0xc0 [ 49.883446] do_syscall_64+0x3f/0x90 [ 49.883943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.884614] [ 49.884845] Freed by task 204: [ 49.885258] kasan_save_stack+0x22/0x50 [ 49.885789] kasan_set_track+0x25/0x30 [ 49.886319] kasan_save_free_info+0x2b/0x50 [ 49.886878] __kasan_slab_free+0x10a/0x190 [ 49.887443] kmem_cache_free+0x10d/0x4d0 [ 49.887981] rcu_core+0x8c8/0x2860 [ 49.888447] __do_softirq+0x1b7/0x7d4 [ 49.888960] [ 49.889194] Last potentially related work creation: [ 49.889818] kasan_save_stack+0x22/0x50 [ 49.890359] __kasan_record_aux_stack+0x8e/0xa0 [ 49.890957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.891652] remove_vma+0x139/0x170 [ 49.892140] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.892720] do_vmi_munmap+0x1f1/0x2b0 [ 49.893226] __vm_munmap+0x138/0x3a0 [ 49.893722] __x64_sys_munmap+0x59/0x80 [ 49.894240] do_syscall_64+0x3f/0x90 [ 49.894737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.895415] [ 49.895645] Second to last potentially related work creation: [ 49.896367] kasan_save_stack+0x22/0x50 [ 49.896902] __kasan_record_aux_stack+0x8e/0xa0 [ 49.897499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.898183] remove_vma+0x139/0x170 [ 49.898656] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.899252] do_vmi_munmap+0x1f1/0x2b0 [ 49.899776] mmap_region+0x1f9/0x2660 [ 49.900279] do_mmap+0x854/0xf00 [ 49.900731] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.901250] ksys_mmap_pgoff+0x3af/0x500 [ 49.901771] do_syscall_64+0x3f/0x90 [ 49.902275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.902945] [ 49.903167] The buggy address belongs to the object at ffff888015c371d0 [ 49.903167] which belongs to the cache vm_area_struct of size 168 [ 49.904706] The buggy address is located 88 bytes inside of [ 49.904706] freed 168-byte region [ffff888015c371d0, ffff888015c37278) [ 49.906154] [ 49.906377] The buggy address belongs to the physical page: [ 49.907059] page:00000000c379d630 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c37 [ 49.908194] memcg:ffff888019d14d01 [ 49.908640] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.909304] page_type: 0xffffffff() [ 49.909773] raw: 0100000000000200 ffff88800879fc80 ffffea0000383c00 0000000000000004 [ 49.910726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d14d01 [ 49.911696] page dumped because: kasan: bad access detected [ 49.912388] [ 49.912611] Memory state around the buggy address: [ 49.913224] ffff888015c37100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.914110] ffff888015c37180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 49.915000] >ffff888015c37200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 49.915887] ^ [ 49.916461] ffff888015c37280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 49.917346] ffff888015c37300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 49.918212] ================================================================== [ 49.919214] Disabling lock debugging due to kernel taint [ 52.117859] BUG: Bad rss-counter state mm:00000000314bee71 type:MM_FILEPAGES val:33 [ 52.118852] BUG: Bad rss-counter state mm:00000000314bee71 type:MM_ANONPAGES val:22 [ 52.647820] BUG: Bad rss-counter state mm:00000000395d7c6e type:MM_FILEPAGES val:33 [ 52.648990] BUG: Bad rss-counter state mm:00000000395d7c6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29388' (ECDSA) to the list of known hosts. 2023/06/19 16:19:48 fuzzer started 2023/06/19 16:19:48 dialing manager at localhost:44161 2023/06/19 16:19:48 checking machine... 2023/06/19 16:19:48 checking revisions... [ 53.403198] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:19:48 testing simple program... [ 53.460376] cgroup: Unknown subsys name 'net' [ 53.513453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:19:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11002b83edb RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81c5f34f RDI=ffff8880161f490c RBP=ffff88800ff3a000 RSP=ffff888015c1f6a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000003 R13=ffff8880161f4900 R14=0000000000000000 R15=ffff88800ff3a000 RIP=ffffffff81c5f388 RFL=00000217 [----APC] 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 00007f3180473900 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=00007f317f8979f0 CR3=000000000c45c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=60e4e0cdd615bf5600000000000ae988 XMM05=e338e90e8bef3b480000000000136968 XMM06=59d5b690e0af863b0000000000135800 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff88806cf09b18 RDX=1ffff1100d9e135a RSI=ffffffff813ad6d0 RDI=ffff88806cf09b40 RBP=ffff88806cf09b10 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88801a0c0000 R15=ffff88800c5fb580 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f844e31c900 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=00007ffd9c4b3000 CR3=000000000cb96000 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