syzkaller login: [ 30.903773] BUG: Bad rss-counter state mm:00000000fd93f0cc type:MM_FILEPAGES val:33 [ 30.904464] BUG: Bad rss-counter state mm:00000000fd93f0cc type:MM_ANONPAGES val:22 [ 31.021281] ================================================================== [ 31.021923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.022577] Read of size 8 at addr ffff888009640df0 by task sshd/221 [ 31.023110] [ 31.023264] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.023865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.024535] Call Trace: [ 31.024754] [ 31.024952] dump_stack_lvl+0x91/0xf0 [ 31.025299] print_report+0xcc/0x620 [ 31.025634] ? __virt_addr_valid+0x102/0x340 [ 31.026162] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.026592] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.027019] kasan_report+0xbe/0xf0 [ 31.027347] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.027772] vma_interval_tree_remove+0xc75/0xec0 [ 31.028230] vma_prepare+0xc54/0x11a0 [ 31.028580] __split_vma+0x5af/0x950 [ 31.028908] ? __pfx___split_vma+0x10/0x10 [ 31.029299] ? find_held_lock+0x2c/0x110 [ 31.029658] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.030043] ? lock_is_held_type+0x9f/0x120 [ 31.030420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.030838] ? mtree_range_walk+0x632/0x900 [ 31.031228] ? mas_walk+0x5c7/0x7c0 [ 31.031568] do_vmi_munmap+0x1f1/0x2b0 [ 31.031921] mmap_region+0x1f9/0x2660 [ 31.032255] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.032616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.033125] ? __pfx_lock_acquire+0x10/0x10 [ 31.033489] ? __pfx_mmap_region+0x10/0x10 [ 31.033853] ? security_mmap_addr+0x7d/0xa0 [ 31.034216] ? get_unmapped_area+0x1f5/0x3f0 [ 31.034592] do_mmap+0x854/0xf00 [ 31.034890] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.035237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.035623] ksys_mmap_pgoff+0x3af/0x500 [ 31.035975] do_syscall_64+0x3f/0x90 [ 31.036300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036741] RIP: 0033:0x7f1cff971d82 [ 31.037067] 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 [ 31.038535] RSP: 002b:00007ffdad46f2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.039156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1cff971d82 [ 31.039743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1cfedab000 [ 31.040321] RBP: 00007f1cfedab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.040898] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f588e9ec0 [ 31.041496] R13: 00007ffdad46f2c0 R14: 00007ffdad46f2f0 R15: 00007ffdad46f650 [ 31.042085] [ 31.042282] [ 31.042430] Allocated by task 214: [ 31.042722] kasan_save_stack+0x22/0x50 [ 31.043068] kasan_set_track+0x25/0x30 [ 31.043404] __kasan_slab_alloc+0x59/0x70 [ 31.043765] kmem_cache_alloc+0x16b/0x370 [ 31.044116] vm_area_dup+0x20/0x160 [ 31.044423] __split_vma+0x170/0x950 [ 31.044741] split_vma+0xc6/0x110 [ 31.045044] mprotect_fixup+0x8d2/0xb30 [ 31.045392] do_mprotect_pkey+0x87e/0xd40 [ 31.045745] __x64_sys_mprotect+0x78/0xc0 [ 31.046103] do_syscall_64+0x3f/0x90 [ 31.046430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046867] [ 31.047013] Freed by task 214: [ 31.047282] kasan_save_stack+0x22/0x50 [ 31.047624] kasan_set_track+0x25/0x30 [ 31.047961] kasan_save_free_info+0x2b/0x50 [ 31.048320] __kasan_slab_free+0x10a/0x190 [ 31.048683] kmem_cache_free+0x10d/0x4d0 [ 31.049063] rcu_core+0x8c8/0x2860 [ 31.049369] __do_softirq+0x1b7/0x7d4 [ 31.049694] [ 31.049842] Last potentially related work creation: [ 31.050240] kasan_save_stack+0x22/0x50 [ 31.050582] __kasan_record_aux_stack+0x8e/0xa0 [ 31.050971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.051404] remove_vma+0x139/0x170 [ 31.051713] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.052098] do_vmi_munmap+0x1f1/0x2b0 [ 31.052432] __vm_munmap+0x138/0x3a0 [ 31.052753] __x64_sys_munmap+0x59/0x80 [ 31.053105] do_syscall_64+0x3f/0x90 [ 31.053430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053872] [ 31.054020] Second to last potentially related work creation: [ 31.054481] kasan_save_stack+0x22/0x50 [ 31.054823] __kasan_record_aux_stack+0x8e/0xa0 [ 31.055219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.055654] remove_vma+0x139/0x170 [ 31.055969] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.056351] do_vmi_munmap+0x1f1/0x2b0 [ 31.056679] mmap_region+0x1f9/0x2660 [ 31.057006] do_mmap+0x854/0xf00 [ 31.057383] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.057744] ksys_mmap_pgoff+0x3af/0x500 [ 31.058098] do_syscall_64+0x3f/0x90 [ 31.058440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058892] [ 31.059044] The buggy address belongs to the object at ffff888009640d98 [ 31.059044] which belongs to the cache vm_area_struct of size 168 [ 31.060065] The buggy address is located 88 bytes inside of [ 31.060065] freed 168-byte region [ffff888009640d98, ffff888009640e40) [ 31.061115] [ 31.061275] The buggy address belongs to the physical page: [ 31.061731] page:000000003a272c8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9640 [ 31.062490] memcg:ffff888013fe6c01 [ 31.062793] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.063276] page_type: 0xffffffff() [ 31.063594] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c6900 dead000000000003 [ 31.064229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fe6c01 [ 31.064852] page dumped because: kasan: bad access detected [ 31.065349] [ 31.065499] Memory state around the buggy address: [ 31.065895] ffff888009640c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.066494] ffff888009640d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.067085] >ffff888009640d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.067678] ^ [ 31.068239] ffff888009640e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.068841] ffff888009640e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.069448] ================================================================== [ 31.070168] Disabling lock debugging due to kernel taint [ 32.395835] BUG: Bad rss-counter state mm:00000000534f3810 type:MM_FILEPAGES val:33 [ 32.396538] BUG: Bad rss-counter state mm:00000000534f3810 type:MM_ANONPAGES val:22 [ 32.806327] BUG: Bad rss-counter state mm:0000000069407fb9 type:MM_FILEPAGES val:33 [ 32.807090] BUG: Bad rss-counter state mm:0000000069407fb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4684' (ECDSA) to the list of known hosts. 2023/06/21 09:36:23 fuzzer started 2023/06/21 09:36:23 dialing manager at localhost:36067 2023/06/21 09:36:23 checking machine... 2023/06/21 09:36:23 checking revisions... [ 33.291033] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:36:23 testing simple program... [ 33.327440] cgroup: Unknown subsys name 'net' [ 33.382327] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffff88800ed955b4 RBP=ffffffff85265479 RSP=ffff88800c407bf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000132 R13=0000000000000000 R14=ffff88800ed951c0 R15=ffffffff8184725c RIP=ffffffff8122e526 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 00007fa05b4ee900 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=00007fa05baa3650 CR3=000000000e5ee000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff813782f8 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800f253680 R15=ffff88800c4d8a80 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007fef4b430900 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=00007fef4a89fbe0 CR3=000000000db7e000 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=0ed5a8237c53a4b21e4d120aca16a6b3 XMM02=000000000011b2a8d59e07bde36eea69 XMM03=000000000011b3d0ec2efd57dc4c00df XMM04=a94c2c488d2b679600000000000ae988 XMM05=f5cf142b8718fecc0000000000134450 XMM06=8df4a8b54d28c14a00000000001331f0 XMM07=fb795ef6d65770560000000000122178 XMM08=2c67c8bc2e329bc3000000000011b3d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000