syzkaller login: [ 35.851072] BUG: Bad rss-counter state mm:00000000c6817acf type:MM_FILEPAGES val:33 [ 35.852206] BUG: Bad rss-counter state mm:00000000c6817acf type:MM_ANONPAGES val:22 [ 36.023008] ================================================================== [ 36.024072] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.025166] Read of size 8 at addr ffff88800f0d5140 by task sshd/221 [ 36.026255] [ 36.026510] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.027529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.028694] Call Trace: [ 36.029053] [ 36.029339] dump_stack_lvl+0x91/0xf0 [ 36.029832] print_report+0xcc/0x620 [ 36.030323] ? __virt_addr_valid+0x102/0x340 [ 36.030908] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.031536] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.032179] kasan_report+0xbe/0xf0 [ 36.032667] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.033296] vma_interval_tree_remove+0xc75/0xec0 [ 36.033912] vma_prepare+0xc54/0x11a0 [ 36.034400] __split_vma+0x5af/0x950 [ 36.034889] ? __pfx___split_vma+0x10/0x10 [ 36.035424] ? find_held_lock+0x2c/0x110 [ 36.035951] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.036526] ? lock_is_held_type+0x9f/0x120 [ 36.037070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.037683] ? mtree_range_walk+0x632/0x900 [ 36.038240] ? mas_walk+0x5c7/0x7c0 [ 36.038715] do_vmi_munmap+0x1f1/0x2b0 [ 36.039239] mmap_region+0x1f9/0x2660 [ 36.039724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.040238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.040960] ? __pfx_lock_acquire+0x10/0x10 [ 36.041502] ? __pfx_mmap_region+0x10/0x10 [ 36.042044] ? security_mmap_addr+0x7d/0xa0 [ 36.042577] ? get_unmapped_area+0x1f5/0x3f0 [ 36.043137] do_mmap+0x854/0xf00 [ 36.043579] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.044078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.044649] ksys_mmap_pgoff+0x3af/0x500 [ 36.045159] do_syscall_64+0x3f/0x90 [ 36.045640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.046287] RIP: 0033:0x7fd53d070d82 [ 36.046747] 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 [ 36.048895] RSP: 002b:00007ffe8f009568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.049813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd53d070d82 [ 36.050670] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd53c4aa000 [ 36.051539] RBP: 00007fd53c4aa000 R08: 0000000000000009 R09: 0000000000001000 [ 36.052402] R10: 0000000000000812 R11: 0000000000000206 R12: 000056266b366980 [ 36.053262] R13: 00007ffe8f009580 R14: 00007ffe8f0095b0 R15: 00007ffe8f009910 [ 36.054130] [ 36.054429] [ 36.054645] Allocated by task 214: [ 36.055092] kasan_save_stack+0x22/0x50 [ 36.055609] kasan_set_track+0x25/0x30 [ 36.056118] __kasan_slab_alloc+0x59/0x70 [ 36.056655] kmem_cache_alloc+0x16b/0x370 [ 36.057184] vm_area_dup+0x20/0x160 [ 36.057644] __split_vma+0x170/0x950 [ 36.058124] split_vma+0xc6/0x110 [ 36.058566] mprotect_fixup+0x8d2/0xb30 [ 36.059092] do_mprotect_pkey+0x87e/0xd40 [ 36.059621] __x64_sys_mprotect+0x78/0xc0 [ 36.060148] do_syscall_64+0x3f/0x90 [ 36.060629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.061275] [ 36.061493] Freed by task 19: [ 36.061884] kasan_save_stack+0x22/0x50 [ 36.062406] kasan_set_track+0x25/0x30 [ 36.062918] kasan_save_free_info+0x2b/0x50 [ 36.063453] __kasan_slab_free+0x10a/0x190 [ 36.063984] kmem_cache_free+0x10d/0x4d0 [ 36.064502] rcu_core+0x8c8/0x2860 [ 36.064953] __do_softirq+0x1b7/0x7d4 [ 36.065430] [ 36.065645] Last potentially related work creation: [ 36.066244] kasan_save_stack+0x22/0x50 [ 36.066756] __kasan_record_aux_stack+0x8e/0xa0 [ 36.067351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.067998] remove_vma+0x139/0x170 [ 36.068446] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.069010] do_vmi_munmap+0x1f1/0x2b0 [ 36.069499] __vm_munmap+0x138/0x3a0 [ 36.069966] __x64_sys_munmap+0x59/0x80 [ 36.070464] do_syscall_64+0x3f/0x90 [ 36.070959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.071604] [ 36.071819] The buggy address belongs to the object at ffff88800f0d50e8 [ 36.071819] which belongs to the cache vm_area_struct of size 168 [ 36.073285] The buggy address is located 88 bytes inside of [ 36.073285] freed 168-byte region [ffff88800f0d50e8, ffff88800f0d5190) [ 36.074692] [ 36.074915] The buggy address belongs to the physical page: [ 36.075577] page:000000006177fe11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0d5 [ 36.076669] memcg:ffff88800df0b301 [ 36.077107] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.077833] page_type: 0xffffffff() [ 36.078348] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.079407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df0b301 [ 36.080432] page dumped because: kasan: bad access detected [ 36.081176] [ 36.081420] Memory state around the buggy address: [ 36.082082] ffff88800f0d5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.083086] ffff88800f0d5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.084073] >ffff88800f0d5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.085048] ^ [ 36.085773] ffff88800f0d5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.086749] ffff88800f0d5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.087723] ================================================================== [ 36.089204] Disabling lock debugging due to kernel taint [ 38.520437] BUG: Bad rss-counter state mm:00000000aec11d8a type:MM_FILEPAGES val:33 [ 38.521471] BUG: Bad rss-counter state mm:00000000aec11d8a type:MM_ANONPAGES val:22 [ 38.926695] BUG: Bad rss-counter state mm:00000000fca8f70b type:MM_FILEPAGES val:33 [ 38.927933] BUG: Bad rss-counter state mm:00000000fca8f70b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10643' (ECDSA) to the list of known hosts. 2023/06/20 04:06:01 fuzzer started 2023/06/20 04:06:01 dialing manager at localhost:44161 2023/06/20 04:06:01 checking machine... 2023/06/20 04:06:01 checking revisions... [ 39.692178] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:06:01 testing simple program... [ 39.742274] cgroup: Unknown subsys name 'net' [ 39.789438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018dbdbd8 RCX=0000000000000000 RDX=1ffff110031b7b7b RSI=ffffffff81ef0d80 RDI=0000000000000007 RBP=ffff88801ac3e5e0 RSP=ffff88801632fd08 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=0000000000020000 R13=0000000000000004 R14=ffff88800e928b80 R15=ffff888010020000 RIP=ffffffff81ef0d95 RFL=00000216 [----AP-] 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 00007fa8d2ada900 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=00007fa8d308f650 CR3=000000000d796000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007f3f9a9f0770 CR3=000000000d7cc000 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=da46af570f596fa3d74662b1e158f487 XMM02=eff9b2d0a8fce9cb0000000000122058 XMM03=2c67c8bc2e329bc30000000000122180 XMM04=2b3f2a33c325636f00000000000ae988 XMM05=74c575242d044fc80000000000135fe8 XMM06=e4cb8bb95a7664b60000000000134e80 XMM07=fb795ef6d657705600000000001252e8 XMM08=2c67c8bc2e329bc30000000000122180 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000