syzkaller login: [ 34.635266] BUG: Bad rss-counter state mm:000000008593985e type:MM_FILEPAGES val:33 [ 34.636332] BUG: Bad rss-counter state mm:000000008593985e type:MM_ANONPAGES val:22 [ 34.808313] ================================================================== [ 34.809448] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.810400] Read of size 8 at addr ffff88800c99e798 by task sshd/218 [ 34.811271] [ 34.811497] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 34.812342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.813342] Call Trace: [ 34.813660] [ 34.813947] dump_stack_lvl+0x91/0xf0 [ 34.814446] print_report+0xcc/0x620 [ 34.814932] ? __virt_addr_valid+0x102/0x340 [ 34.815479] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.816098] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.816734] kasan_report+0xbe/0xf0 [ 34.817206] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.817829] vma_interval_tree_remove+0xc75/0xec0 [ 34.818442] vma_prepare+0xc54/0x11a0 [ 34.818917] __split_vma+0x5af/0x950 [ 34.819381] ? __pfx___split_vma+0x10/0x10 [ 34.819906] ? find_held_lock+0x2c/0x110 [ 34.820424] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.820995] ? lock_is_held_type+0x9f/0x120 [ 34.821529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.822132] ? mtree_range_walk+0x632/0x900 [ 34.822679] ? mas_walk+0x5c7/0x7c0 [ 34.823155] do_vmi_munmap+0x1f1/0x2b0 [ 34.823644] mmap_region+0x1f9/0x2660 [ 34.824120] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.824632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.825340] ? __pfx_lock_acquire+0x10/0x10 [ 34.825873] ? __pfx_mmap_region+0x10/0x10 [ 34.826401] ? security_mmap_addr+0x7d/0xa0 [ 34.826923] ? get_unmapped_area+0x1f5/0x3f0 [ 34.827467] do_mmap+0x854/0xf00 [ 34.827899] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.828389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.828962] ksys_mmap_pgoff+0x3af/0x500 [ 34.829466] do_syscall_64+0x3f/0x90 [ 34.829939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.830587] RIP: 0033:0x7fc4cc4bdd82 [ 34.831040] 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 [ 34.833157] RSP: 002b:00007ffd2a263f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.834070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4cc4bdd82 [ 34.834913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4cb8f7000 [ 34.835752] RBP: 00007fc4cb8f7000 R08: 0000000000000009 R09: 0000000000001000 [ 34.836601] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e101cc1ec0 [ 34.837447] R13: 00007ffd2a263f40 R14: 00007ffd2a263f70 R15: 00007ffd2a2642d0 [ 34.838313] [ 34.838607] [ 34.838826] Allocated by task 211: [ 34.839258] kasan_save_stack+0x22/0x50 [ 34.839762] kasan_set_track+0x25/0x30 [ 34.840251] __kasan_slab_alloc+0x59/0x70 [ 34.840790] kmem_cache_alloc+0x16b/0x370 [ 34.841300] vm_area_dup+0x20/0x160 [ 34.841750] __split_vma+0x170/0x950 [ 34.842212] split_vma+0xc6/0x110 [ 34.842648] mprotect_fixup+0x8d2/0xb30 [ 34.843144] do_mprotect_pkey+0x87e/0xd40 [ 34.843658] __x64_sys_mprotect+0x78/0xc0 [ 34.844175] do_syscall_64+0x3f/0x90 [ 34.844663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.845308] [ 34.845522] Freed by task 211: [ 34.845914] kasan_save_stack+0x22/0x50 [ 34.846412] kasan_set_track+0x25/0x30 [ 34.846902] kasan_save_free_info+0x2b/0x50 [ 34.847424] __kasan_slab_free+0x10a/0x190 [ 34.847951] kmem_cache_free+0x10d/0x4d0 [ 34.848452] rcu_core+0x8c8/0x2860 [ 34.848906] __do_softirq+0x1b7/0x7d4 [ 34.849375] [ 34.849588] Last potentially related work creation: [ 34.850185] kasan_save_stack+0x22/0x50 [ 34.850699] __kasan_record_aux_stack+0x8e/0xa0 [ 34.851272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.851922] remove_vma+0x139/0x170 [ 34.852371] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.852947] do_vmi_munmap+0x1f1/0x2b0 [ 34.853428] __vm_munmap+0x138/0x3a0 [ 34.853899] __x64_sys_munmap+0x59/0x80 [ 34.854404] do_syscall_64+0x3f/0x90 [ 34.854885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.855523] [ 34.855739] The buggy address belongs to the object at ffff88800c99e740 [ 34.855739] which belongs to the cache vm_area_struct of size 168 [ 34.857226] The buggy address is located 88 bytes inside of [ 34.857226] freed 168-byte region [ffff88800c99e740, ffff88800c99e7e8) [ 34.858630] [ 34.858845] The buggy address belongs to the physical page: [ 34.859500] page:00000000eaf4c1a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc99e [ 34.860581] memcg:ffff88800e312b01 [ 34.861006] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.861710] page_type: 0xffffffff() [ 34.862159] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356180 dead000000000005 [ 34.863078] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e312b01 [ 34.863982] page dumped because: kasan: bad access detected [ 34.864657] [ 34.864870] Memory state around the buggy address: [ 34.865458] ffff88800c99e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.866308] ffff88800c99e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.867152] >ffff88800c99e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.867999] ^ [ 34.868486] ffff88800c99e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.869343] ffff88800c99e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.870197] ================================================================== [ 34.871260] Disabling lock debugging due to kernel taint [ 36.730057] BUG: Bad rss-counter state mm:000000000adc339f type:MM_FILEPAGES val:33 [ 36.731440] BUG: Bad rss-counter state mm:000000000adc339f type:MM_ANONPAGES val:22 [ 37.249744] BUG: Bad rss-counter state mm:0000000039db470b type:MM_FILEPAGES val:33 [ 37.250825] BUG: Bad rss-counter state mm:0000000039db470b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26509' (ECDSA) to the list of known hosts. 2023/06/20 19:51:06 fuzzer started 2023/06/20 19:51:06 dialing manager at localhost:36067 2023/06/20 19:51:06 checking machine... 2023/06/20 19:51:06 checking revisions... [ 37.895465] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:51:06 testing simple program... [ 37.948225] cgroup: Unknown subsys name 'net' [ 38.002065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:51:06 Registers: info registers vcpu 0 RAX=1ffffffff0c02953 RBX=ffffffff86014a9c RCX=ffffffff86621197 RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff85fb5838 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86073d04 R13=ffffffff85d7a9c4 R14=ffffffff85fb5834 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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=00007f645c579390 CR3=000000000c7fc000 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=1460128a1c0cdc92e240337be228b5cc XMM02=2c67c8bc2e329bc3000000000011cb70 XMM03=fb795ef6d65770560000000000122d78 XMM04=3654282dd7caef4700000000000ae988 XMM05=43c7f10f44f665b50000000000133a38 XMM06=bdf2e299e47b49d50000000000132768 XMM07=e042d86d42eb936e0000000000123050 XMM08=9b51caaa47a265f2000000000011cbd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008aa1e40 RCX=0000000000000000 RDX=ffff888016e751c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800b8bfaf8 RSP=ffff88800b8bfa88 R8 =0000000000000007 R9 =0000000000001000 R10=ffff888008aa1e42 R11=00000000000b6a61 R12=ffff888008aa1e42 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c02e4 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 00007fee9aa89900 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=00007ffcee703000 CR3=000000000db7c000 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