syzkaller login: [ 31.059563] BUG: Bad rss-counter state mm:000000006b1eb9e4 type:MM_FILEPAGES val:33 [ 31.060944] BUG: Bad rss-counter state mm:000000006b1eb9e4 type:MM_ANONPAGES val:22 [ 31.225379] ================================================================== [ 31.226314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.227260] Read of size 8 at addr ffff888019cb3798 by task sshd/219 [ 31.228110] [ 31.228341] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.229211] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.230240] Call Trace: [ 31.230563] [ 31.230861] dump_stack_lvl+0x91/0xf0 [ 31.231361] print_report+0xcc/0x620 [ 31.231862] ? __virt_addr_valid+0x102/0x340 [ 31.232419] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233064] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233715] kasan_report+0xbe/0xf0 [ 31.234214] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234879] vma_interval_tree_remove+0xc75/0xec0 [ 31.235508] vma_prepare+0xc54/0x11a0 [ 31.236027] __split_vma+0x5af/0x950 [ 31.236523] ? __pfx___split_vma+0x10/0x10 [ 31.237088] ? find_held_lock+0x2c/0x110 [ 31.237649] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.238243] ? lock_is_held_type+0x9f/0x120 [ 31.238814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.239460] ? mtree_range_walk+0x632/0x900 [ 31.240051] ? mas_walk+0x5c7/0x7c0 [ 31.240555] do_vmi_munmap+0x1f1/0x2b0 [ 31.241068] mmap_region+0x1f9/0x2660 [ 31.241573] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.242117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.242875] ? __pfx_lock_acquire+0x10/0x10 [ 31.243438] ? __pfx_mmap_region+0x10/0x10 [ 31.244006] ? security_mmap_addr+0x7d/0xa0 [ 31.244565] ? get_unmapped_area+0x1f5/0x3f0 [ 31.245144] do_mmap+0x854/0xf00 [ 31.245603] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.246151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.246744] ksys_mmap_pgoff+0x3af/0x500 [ 31.247283] do_syscall_64+0x3f/0x90 [ 31.247794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248476] RIP: 0033:0x7f22469b5d82 [ 31.248960] 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 [ 31.251228] RSP: 002b:00007ffc95243228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22469b5d82 [ 31.253089] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2245def000 [ 31.254000] RBP: 00007f2245def000 R08: 0000000000000009 R09: 0000000000001000 [ 31.254899] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0d95b9980 [ 31.255806] R13: 00007ffc95243240 R14: 00007ffc95243270 R15: 00007ffc952435d0 [ 31.256721] [ 31.257029] [ 31.257255] Allocated by task 212: [ 31.257729] kasan_save_stack+0x22/0x50 [ 31.258264] kasan_set_track+0x25/0x30 [ 31.258783] __kasan_slab_alloc+0x59/0x70 [ 31.259339] kmem_cache_alloc+0x16b/0x370 [ 31.259885] vm_area_dup+0x20/0x160 [ 31.260356] __split_vma+0x170/0x950 [ 31.260852] split_vma+0xc6/0x110 [ 31.261309] mprotect_fixup+0x8d2/0xb30 [ 31.261847] do_mprotect_pkey+0x87e/0xd40 [ 31.262405] __x64_sys_mprotect+0x78/0xc0 [ 31.262956] do_syscall_64+0x3f/0x90 [ 31.263452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264133] [ 31.264358] Freed by task 212: [ 31.264784] kasan_save_stack+0x22/0x50 [ 31.265314] kasan_set_track+0x25/0x30 [ 31.265854] kasan_save_free_info+0x2b/0x50 [ 31.266419] __kasan_slab_free+0x10a/0x190 [ 31.266981] kmem_cache_free+0x10d/0x4d0 [ 31.267515] rcu_core+0x8c8/0x2860 [ 31.267989] __do_softirq+0x1b7/0x7d4 [ 31.268494] [ 31.268722] Last potentially related work creation: [ 31.269337] kasan_save_stack+0x22/0x50 [ 31.269877] __kasan_record_aux_stack+0x8e/0xa0 [ 31.270482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271158] remove_vma+0x139/0x170 [ 31.271640] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272218] do_vmi_munmap+0x1f1/0x2b0 [ 31.272727] __vm_munmap+0x138/0x3a0 [ 31.273217] __x64_sys_munmap+0x59/0x80 [ 31.273760] do_syscall_64+0x3f/0x90 [ 31.274261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274946] [ 31.275176] The buggy address belongs to the object at ffff888019cb3740 [ 31.275176] which belongs to the cache vm_area_struct of size 168 [ 31.276732] The buggy address is located 88 bytes inside of [ 31.276732] freed 168-byte region [ffff888019cb3740, ffff888019cb37e8) [ 31.278236] [ 31.278461] The buggy address belongs to the physical page: [ 31.279161] page:00000000289570fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cb3 [ 31.280305] memcg:ffff888019d00801 [ 31.280755] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.281445] page_type: 0xffffffff() [ 31.281931] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.282905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d00801 [ 31.283873] page dumped because: kasan: bad access detected [ 31.284579] [ 31.284808] Memory state around the buggy address: [ 31.285423] ffff888019cb3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.286365] ffff888019cb3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.287279] >ffff888019cb3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.288184] ^ [ 31.288710] ffff888019cb3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.289624] ffff888019cb3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.290543] ================================================================== [ 31.291571] Disabling lock debugging due to kernel taint [ 33.348494] BUG: Bad rss-counter state mm:0000000061cafbe0 type:MM_FILEPAGES val:32 [ 33.349768] BUG: Bad rss-counter state mm:0000000061cafbe0 type:MM_ANONPAGES val:22 [ 33.780502] BUG: Bad rss-counter state mm:00000000deddd945 type:MM_FILEPAGES val:33 [ 33.781514] BUG: Bad rss-counter state mm:00000000deddd945 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42046' (ECDSA) to the list of known hosts. 2023/06/20 15:19:18 fuzzer started 2023/06/20 15:19:19 dialing manager at localhost:36067 2023/06/20 15:19:19 checking machine... 2023/06/20 15:19:19 checking revisions... [ 34.603742] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:19:19 testing simple program... [ 34.648307] cgroup: Unknown subsys name 'net' [ 34.697163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86607dd4 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e4192e0 RIP=ffffffff8135bdea 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 =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=00007ffe3d529848 CR3=000000000e160000 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=2038313a39313a3531203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a363931343520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a39313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff84601286 RCX=0000000000000001 RDX=1ffff11002b82e8c RSI=ffff888015c17f30 RDI=ffffffff84601286 RBP=ffffffff84601286 RSP=ffff888015c173b0 R8 =0000000000000001 R9 =ffff888015c17448 R10=0000000000038001 R11=00000000000b5365 R12=ffff888015c174d0 R13=0000000000000000 R14=ffff888015c18000 R15=ffff88800c532000 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007f88615a5900 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=00007f88609f67a0 CR3=000000000c5fa000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8a11b83fd7372d2d00000000000ae988 XMM05=dc440f10ec5173350000000000132a20 XMM06=806171799158d9670000000000131ac0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000