syzkaller login: [ 31.270210] BUG: Bad rss-counter state mm:000000005cfc939b type:MM_FILEPAGES val:33 [ 31.271223] BUG: Bad rss-counter state mm:000000005cfc939b type:MM_ANONPAGES val:22 [ 31.441602] ================================================================== [ 31.442512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.443456] Read of size 8 at addr ffff88801a1f2058 by task sshd/221 [ 31.444354] [ 31.444574] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.445439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.446427] Call Trace: [ 31.446747] [ 31.447032] dump_stack_lvl+0x91/0xf0 [ 31.447522] print_report+0xcc/0x620 [ 31.448001] ? __virt_addr_valid+0x102/0x340 [ 31.448572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.449187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.449797] kasan_report+0xbe/0xf0 [ 31.450268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.450888] vma_interval_tree_remove+0xc75/0xec0 [ 31.451482] vma_prepare+0xc54/0x11a0 [ 31.451960] __split_vma+0x5af/0x950 [ 31.452460] ? __pfx___split_vma+0x10/0x10 [ 31.452998] ? find_held_lock+0x2c/0x110 [ 31.453520] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.454086] ? lock_is_held_type+0x9f/0x120 [ 31.454637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.455260] ? mtree_range_walk+0x632/0x900 [ 31.455813] ? mas_walk+0x5c7/0x7c0 [ 31.456301] do_vmi_munmap+0x1f1/0x2b0 [ 31.456810] mmap_region+0x1f9/0x2660 [ 31.457297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.457817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.458540] ? __pfx_lock_acquire+0x10/0x10 [ 31.459079] ? __pfx_mmap_region+0x10/0x10 [ 31.459607] ? security_mmap_addr+0x7d/0xa0 [ 31.460147] ? get_unmapped_area+0x1f5/0x3f0 [ 31.460719] do_mmap+0x854/0xf00 [ 31.461159] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.461660] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.462226] ksys_mmap_pgoff+0x3af/0x500 [ 31.462733] do_syscall_64+0x3f/0x90 [ 31.463221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.463873] RIP: 0033:0x7f26e0cf6d82 [ 31.464356] 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 [ 31.466495] RSP: 002b:00007ffc76e6b258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.467417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26e0cf6d82 [ 31.468321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26e0130000 [ 31.469190] RBP: 00007f26e0130000 R08: 0000000000000009 R09: 0000000000001000 [ 31.470065] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e495627980 [ 31.470918] R13: 00007ffc76e6b270 R14: 00007ffc76e6b2a0 R15: 00007ffc76e6b600 [ 31.471801] [ 31.472094] [ 31.472323] Allocated by task 213: [ 31.472771] kasan_save_stack+0x22/0x50 [ 31.473272] kasan_set_track+0x25/0x30 [ 31.473780] __kasan_slab_alloc+0x59/0x70 [ 31.474304] kmem_cache_alloc+0x16b/0x370 [ 31.474824] vm_area_dup+0x20/0x160 [ 31.475283] __split_vma+0x170/0x950 [ 31.475749] split_vma+0xc6/0x110 [ 31.476202] mprotect_fixup+0x8d2/0xb30 [ 31.476720] do_mprotect_pkey+0x87e/0xd40 [ 31.477242] __x64_sys_mprotect+0x78/0xc0 [ 31.477763] do_syscall_64+0x3f/0x90 [ 31.478249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.478895] [ 31.479114] Freed by task 213: [ 31.479508] kasan_save_stack+0x22/0x50 [ 31.480021] kasan_set_track+0x25/0x30 [ 31.480535] kasan_save_free_info+0x2b/0x50 [ 31.481079] __kasan_slab_free+0x10a/0x190 [ 31.481623] kmem_cache_free+0x10d/0x4d0 [ 31.482135] rcu_core+0x8c8/0x2860 [ 31.482580] __do_softirq+0x1b7/0x7d4 [ 31.483053] [ 31.483268] Last potentially related work creation: [ 31.483855] kasan_save_stack+0x22/0x50 [ 31.484376] __kasan_record_aux_stack+0x8e/0xa0 [ 31.484955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.485606] remove_vma+0x139/0x170 [ 31.486072] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.486647] do_vmi_munmap+0x1f1/0x2b0 [ 31.487138] __vm_munmap+0x138/0x3a0 [ 31.487628] __x64_sys_munmap+0x59/0x80 [ 31.488127] do_syscall_64+0x3f/0x90 [ 31.488612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489263] [ 31.489482] The buggy address belongs to the object at ffff88801a1f2000 [ 31.489482] which belongs to the cache vm_area_struct of size 168 [ 31.490984] The buggy address is located 88 bytes inside of [ 31.490984] freed 168-byte region [ffff88801a1f2000, ffff88801a1f20a8) [ 31.492416] [ 31.492632] The buggy address belongs to the physical page: [ 31.493294] page:00000000f63062f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1f2 [ 31.494407] memcg:ffff88801a1e4601 [ 31.494841] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.495494] page_type: 0xffffffff() [ 31.495951] raw: 0100000000000200 ffff8880087a0c80 ffffea00003865c0 dead000000000002 [ 31.496905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1e4601 [ 31.497844] page dumped because: kasan: bad access detected [ 31.498508] [ 31.498732] Memory state around the buggy address: [ 31.499313] ffff88801a1f1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.500193] ffff88801a1f1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.501051] >ffff88801a1f2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.501914] ^ [ 31.502646] ffff88801a1f2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.503514] ffff88801a1f2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.504394] ================================================================== [ 31.505525] Disabling lock debugging due to kernel taint [ 33.418608] BUG: Bad rss-counter state mm:000000005e73889e type:MM_FILEPAGES val:33 [ 33.420350] BUG: Bad rss-counter state mm:000000005e73889e type:MM_ANONPAGES val:22 [ 33.925548] BUG: Bad rss-counter state mm:00000000c0990c22 type:MM_FILEPAGES val:33 [ 33.926688] BUG: Bad rss-counter state mm:00000000c0990c22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40596' (ECDSA) to the list of known hosts. 2023/06/20 13:00:19 fuzzer started 2023/06/20 13:00:19 dialing manager at localhost:36067 2023/06/20 13:00:19 checking machine... 2023/06/20 13:00:19 checking revisions... [ 34.579873] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:00:19 testing simple program... [ 34.629966] cgroup: Unknown subsys name 'net' [ 34.666133] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016adf9d0 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888016adf938 RBP=ffff888016a951c0 RSP=ffff888016adf8e0 R8 =ffff88800e30e000 R9 =0000000000000000 R10=ffff888016adf938 R11=ffff88800ee19900 R12=0000000000000000 R13=ffff888016adf960 R14=ffff888016a951c0 R15=ffff888016adf938 RIP=ffffffff8451341a RFL=00000247 [---Z-PC] 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 00007fbb2a00b900 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=00007fbb2a5c2618 CR3=000000000e19e000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc5c92e878 CR3=0000000009806000 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=2039313a30303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000