syzkaller login: [ 36.359657] BUG: Bad rss-counter state mm:00000000f490e738 type:MM_FILEPAGES val:33 [ 36.360860] BUG: Bad rss-counter state mm:00000000f490e738 type:MM_ANONPAGES val:22 [ 36.396803] ================================================================== [ 36.397749] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.398741] Read of size 8 at addr ffff88800dcf3c20 by task sshd/219 [ 36.399612] [ 36.399830] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.400700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.401708] Call Trace: [ 36.402034] [ 36.402327] dump_stack_lvl+0x91/0xf0 [ 36.402819] print_report+0xcc/0x620 [ 36.403299] ? __virt_addr_valid+0x102/0x340 [ 36.403852] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.404506] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.405192] kasan_report+0xbe/0xf0 [ 36.405731] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.406428] vma_interval_tree_remove+0xc75/0xec0 [ 36.407077] vma_prepare+0xc54/0x11a0 [ 36.407586] __split_vma+0x5af/0x950 [ 36.408096] ? __pfx___split_vma+0x10/0x10 [ 36.408665] ? find_held_lock+0x2c/0x110 [ 36.409224] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.409821] ? lock_is_held_type+0x9f/0x120 [ 36.410427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.411084] ? mtree_range_walk+0x632/0x900 [ 36.411677] ? mas_walk+0x5c7/0x7c0 [ 36.412189] do_vmi_munmap+0x1f1/0x2b0 [ 36.412723] mmap_region+0x1f9/0x2660 [ 36.413245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.413776] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.414540] ? __pfx_lock_acquire+0x10/0x10 [ 36.415076] ? __pfx_mmap_region+0x10/0x10 [ 36.415608] ? security_mmap_addr+0x7d/0xa0 [ 36.416144] ? get_unmapped_area+0x1f5/0x3f0 [ 36.416693] do_mmap+0x854/0xf00 [ 36.417135] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.417628] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.418205] ksys_mmap_pgoff+0x3af/0x500 [ 36.418721] do_syscall_64+0x3f/0x90 [ 36.419202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.419855] RIP: 0033:0x7fb9b532ad82 [ 36.420312] 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 [ 36.422489] RSP: 002b:00007ffda94da848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.423398] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9b532ad82 [ 36.424262] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9b4764000 [ 36.425134] RBP: 00007fb9b4764000 R08: 0000000000000009 R09: 0000000000001000 [ 36.426020] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555752101ec0 [ 36.426872] R13: 00007ffda94da860 R14: 00007ffda94da890 R15: 00007ffda94dabf0 [ 36.427731] [ 36.428026] [ 36.428250] Allocated by task 212: [ 36.428685] kasan_save_stack+0x22/0x50 [ 36.429198] kasan_set_track+0x25/0x30 [ 36.429695] __kasan_slab_alloc+0x59/0x70 [ 36.430231] kmem_cache_alloc+0x16b/0x370 [ 36.430754] vm_area_dup+0x20/0x160 [ 36.431209] __split_vma+0x170/0x950 [ 36.431684] split_vma+0xc6/0x110 [ 36.432133] mprotect_fixup+0x8d2/0xb30 [ 36.432646] do_mprotect_pkey+0x87e/0xd40 [ 36.433167] __x64_sys_mprotect+0x78/0xc0 [ 36.433690] do_syscall_64+0x3f/0x90 [ 36.434188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.434841] [ 36.435061] Freed by task 212: [ 36.435450] kasan_save_stack+0x22/0x50 [ 36.435963] kasan_set_track+0x25/0x30 [ 36.436464] kasan_save_free_info+0x2b/0x50 [ 36.437001] __kasan_slab_free+0x10a/0x190 [ 36.437534] kmem_cache_free+0x10d/0x4d0 [ 36.438061] rcu_core+0x8c8/0x2860 [ 36.438509] __do_softirq+0x1b7/0x7d4 [ 36.438987] [ 36.439207] Last potentially related work creation: [ 36.439794] kasan_save_stack+0x22/0x50 [ 36.440295] __kasan_record_aux_stack+0x8e/0xa0 [ 36.440879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.441519] remove_vma+0x139/0x170 [ 36.441994] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.442555] do_vmi_munmap+0x1f1/0x2b0 [ 36.443049] __vm_munmap+0x138/0x3a0 [ 36.443522] __x64_sys_munmap+0x59/0x80 [ 36.444024] do_syscall_64+0x3f/0x90 [ 36.444500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.445154] [ 36.445372] The buggy address belongs to the object at ffff88800dcf3bc8 [ 36.445372] which belongs to the cache vm_area_struct of size 168 [ 36.446882] The buggy address is located 88 bytes inside of [ 36.446882] freed 168-byte region [ffff88800dcf3bc8, ffff88800dcf3c70) [ 36.448310] [ 36.448530] The buggy address belongs to the physical page: [ 36.449193] page:00000000b3cf9d96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf3 [ 36.450310] memcg:ffff88800e854f01 [ 36.450742] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.451448] page_type: 0xffffffff() [ 36.451914] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.452834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e854f01 [ 36.453747] page dumped because: kasan: bad access detected [ 36.454426] [ 36.454642] Memory state around the buggy address: [ 36.455224] ffff88800dcf3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.456090] ffff88800dcf3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.456951] >ffff88800dcf3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.457818] ^ [ 36.458362] ffff88800dcf3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.459222] ffff88800dcf3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.460090] ================================================================== [ 36.461258] Disabling lock debugging due to kernel taint [ 38.396206] BUG: Bad rss-counter state mm:00000000eac5c462 type:MM_FILEPAGES val:33 [ 38.396905] BUG: Bad rss-counter state mm:00000000eac5c462 type:MM_ANONPAGES val:22 [ 38.821713] BUG: Bad rss-counter state mm:00000000f3550420 type:MM_FILEPAGES val:33 [ 38.822809] BUG: Bad rss-counter state mm:00000000f3550420 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26573' (ECDSA) to the list of known hosts. 2023/06/19 12:02:38 fuzzer started 2023/06/19 12:02:39 dialing manager at localhost:44161 2023/06/19 12:02:39 checking machine... 2023/06/19 12:02:39 checking revisions... [ 39.551263] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:02:39 testing simple program... [ 39.609016] cgroup: Unknown subsys name 'net' [ 39.645676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:02:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880160e1b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff8880160e1f34 RBP=00007fea32fecbe7 RSP=ffff88800caf7560 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fea32fecbe7 R13=0000000000000000 R14=ffff8880160e1b40 R15=0000000000092cc0 RIP=ffffffff8135bd1b RFL=00000213 [----A-C] 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 00007fea32b0a900 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=00007fea330bf650 CR3=0000000016096000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ffc7000 RCX=0000000000000001 RDX=0000000000000200 RSI=0000000000000000 RDI=ffffed1001ff8f80 RBP=0000000000001000 RSP=ffff8880147ff598 R8 =0000000000000001 R9 =0000000000000000 R10=ffffed1001ff8e00 R11=00000000000b6996 R12=0000000000000000 R13=ffffea00003ff1f4 R14=dffffc0000000000 R15=ffff88807ffdc500 RIP=ffffffff8450d403 RFL=00000202 [-------] 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 00007f16ff1ca900 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=00007f16fe6446a0 CR3=000000000d65c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4e12f30117614e7600000000000ae988 XMM05=c73ea78d23174e210000000000134868 XMM06=806171799158d96700000000001332e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000