syzkaller login: [ 41.050486] BUG: Bad rss-counter state mm:00000000f3580cac type:MM_FILEPAGES val:33 [ 41.051280] BUG: Bad rss-counter state mm:00000000f3580cac type:MM_ANONPAGES val:22 [ 41.081221] ================================================================== [ 41.082063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.082968] Read of size 8 at addr ffff8880168c74e0 by task sshd/218 [ 41.083597] [ 41.083750] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.084496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.085187] Call Trace: [ 41.085401] <TASK> [ 41.085743] dump_stack_lvl+0x91/0xf0 [ 41.086162] print_report+0xcc/0x620 [ 41.086501] ? __virt_addr_valid+0x102/0x340 [ 41.086869] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.087281] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.087697] kasan_report+0xbe/0xf0 [ 41.088016] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.088439] vma_interval_tree_remove+0xc75/0xec0 [ 41.088925] vma_prepare+0xc54/0x11a0 [ 41.089260] __split_vma+0x5af/0x950 [ 41.089581] ? __pfx___split_vma+0x10/0x10 [ 41.089940] ? find_held_lock+0x2c/0x110 [ 41.090306] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.090696] ? lock_is_held_type+0x9f/0x120 [ 41.091057] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.091466] ? mtree_range_walk+0x632/0x900 [ 41.091844] ? mas_walk+0x5c7/0x7c0 [ 41.092168] do_vmi_munmap+0x1f1/0x2b0 [ 41.092506] mmap_region+0x1f9/0x2660 [ 41.092836] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.093179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.093655] ? __pfx_lock_acquire+0x10/0x10 [ 41.094024] ? __pfx_mmap_region+0x10/0x10 [ 41.094375] ? security_mmap_addr+0x7d/0xa0 [ 41.094759] ? get_unmapped_area+0x1f5/0x3f0 [ 41.095134] do_mmap+0x854/0xf00 [ 41.095436] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.095776] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.096161] ksys_mmap_pgoff+0x3af/0x500 [ 41.096511] do_syscall_64+0x3f/0x90 [ 41.096833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.097279] RIP: 0033:0x7fcc7aae4d82 [ 41.097598] 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 [ 41.099054] RSP: 002b:00007fff9fe782e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.099666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc7aae4d82 [ 41.100246] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc79f1e000 [ 41.100835] RBP: 00007fcc79f1e000 R08: 0000000000000009 R09: 0000000000001000 [ 41.101418] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638bc0d6ec0 [ 41.101986] R13: 00007fff9fe78300 R14: 00007fff9fe78330 R15: 00007fff9fe78690 [ 41.102585] </TASK> [ 41.102784] [ 41.102932] Allocated by task 211: [ 41.103226] kasan_save_stack+0x22/0x50 [ 41.103576] kasan_set_track+0x25/0x30 [ 41.103915] __kasan_slab_alloc+0x59/0x70 [ 41.104291] kmem_cache_alloc+0x16b/0x370 [ 41.104643] vm_area_dup+0x20/0x160 [ 41.104960] __split_vma+0x170/0x950 [ 41.105273] split_vma+0xc6/0x110 [ 41.105571] mprotect_fixup+0x8d2/0xb30 [ 41.105916] do_mprotect_pkey+0x87e/0xd40 [ 41.106274] __x64_sys_mprotect+0x78/0xc0 [ 41.106674] do_syscall_64+0x3f/0x90 [ 41.107007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.107451] [ 41.107596] Freed by task 202: [ 41.107858] kasan_save_stack+0x22/0x50 [ 41.108195] kasan_set_track+0x25/0x30 [ 41.108534] kasan_save_free_info+0x2b/0x50 [ 41.108899] __kasan_slab_free+0x10a/0x190 [ 41.109264] kmem_cache_free+0x10d/0x4d0 [ 41.109604] rcu_core+0x8c8/0x2860 [ 41.109907] __do_softirq+0x1b7/0x7d4 [ 41.110223] [ 41.110619] Last potentially related work creation: [ 41.111013] kasan_save_stack+0x22/0x50 [ 41.111367] __kasan_record_aux_stack+0x8e/0xa0 [ 41.111754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.112181] remove_vma+0x139/0x170 [ 41.112489] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.112870] do_vmi_munmap+0x1f1/0x2b0 [ 41.113203] __vm_munmap+0x138/0x3a0 [ 41.113525] __x64_sys_munmap+0x59/0x80 [ 41.113863] do_syscall_64+0x3f/0x90 [ 41.114181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.114641] [ 41.114786] The buggy address belongs to the object at ffff8880168c7488 [ 41.114786] which belongs to the cache vm_area_struct of size 168 [ 41.115754] The buggy address is located 88 bytes inside of [ 41.115754] freed 168-byte region [ffff8880168c7488, ffff8880168c7530) [ 41.116700] [ 41.116854] The buggy address belongs to the physical page: [ 41.117299] page:0000000053471ea1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168c7 [ 41.118027] memcg:ffff888019fee601 [ 41.118316] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.118784] page_type: 0xffffffff() [ 41.119088] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.119700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fee601 [ 41.120291] page dumped because: kasan: bad access detected [ 41.120743] [ 41.120891] Memory state around the buggy address: [ 41.121279] ffff8880168c7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.121855] ffff8880168c7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 41.122441] >ffff8880168c7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.123008] ^ [ 41.123502] ffff8880168c7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 41.124074] ffff8880168c7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.124652] ================================================================== [ 41.125393] Disabling lock debugging due to kernel taint [ 42.954727] BUG: Bad rss-counter state mm:00000000b3656b57 type:MM_FILEPAGES val:33 [ 42.955402] BUG: Bad rss-counter state mm:00000000b3656b57 type:MM_ANONPAGES val:22 [ 43.341238] BUG: Bad rss-counter state mm:0000000013d24891 type:MM_FILEPAGES val:33 [ 43.342016] BUG: Bad rss-counter state mm:0000000013d24891 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38190' (ECDSA) to the list of known hosts. 2023/06/20 09:14:20 fuzzer started 2023/06/20 09:14:20 dialing manager at localhost:44161 2023/06/20 09:14:20 checking machine... 2023/06/20 09:14:20 checking revisions... [ 43.925662] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:14:20 testing simple program... [ 43.970068] cgroup: Unknown subsys name 'net' [ 44.004622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:14:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613753e RDX=1ffff11001ea7e47 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f53f248 RSP=ffff88800f53f180 R8 =ffffffff86137542 R9 =ffff88800f53f230 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800f53f250 R13=ffff88800f53f238 R14=0000000000000005 R15=ffff88800f53f1f0 RIP=ffffffff81130b54 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 00007f7e58b46900 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=00007f7e590fd618 CR3=000000000de0a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f4d79dc2030 CR3=000000000cafc000 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=00000000000000000000000000000000 XMM01=f16e9a15bccbae9f4c4a4c60da0321d0 XMM02=2c67c8bc2e329bc3000000000011d398 XMM03=fb795ef6d65770560000000000123d58 XMM04=72ac7bbb0bf015c200000000000ae988 XMM05=562c8678ce1d75f50000000000133db0 XMM06=bdf2e299e47b49d50000000000133520 XMM07=e042d86d42eb936e0000000000123fd8 XMM08=0c3201ca2b5bf4f2000000000011d3f8 XMM09=00000000000000000000000000000000 XMM10=00000020000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000