syzkaller login: [ 41.522106] BUG: Bad rss-counter state mm:0000000054b5fcf4 type:MM_FILEPAGES val:33 [ 41.523162] BUG: Bad rss-counter state mm:0000000054b5fcf4 type:MM_ANONPAGES val:22 [ 41.697171] ================================================================== [ 41.698164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.699115] Read of size 8 at addr ffff88800cb7a798 by task sshd/220 [ 41.700057] [ 41.700273] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.701136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.702159] Call Trace: [ 41.702478] [ 41.702775] dump_stack_lvl+0x91/0xf0 [ 41.703276] print_report+0xcc/0x620 [ 41.703781] ? __virt_addr_valid+0x102/0x340 [ 41.704350] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.704993] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.705607] kasan_report+0xbe/0xf0 [ 41.706086] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.706710] vma_interval_tree_remove+0xc75/0xec0 [ 41.707344] vma_prepare+0xc54/0x11a0 [ 41.707844] __split_vma+0x5af/0x950 [ 41.708334] ? __pfx___split_vma+0x10/0x10 [ 41.708880] ? find_held_lock+0x2c/0x110 [ 41.709402] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.709974] ? lock_is_held_type+0x9f/0x120 [ 41.710533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.711150] ? mtree_range_walk+0x632/0x900 [ 41.711734] ? mas_walk+0x5c7/0x7c0 [ 41.712217] do_vmi_munmap+0x1f1/0x2b0 [ 41.712736] mmap_region+0x1f9/0x2660 [ 41.713223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.713732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.714459] ? __pfx_lock_acquire+0x10/0x10 [ 41.715002] ? __pfx_mmap_region+0x10/0x10 [ 41.715544] ? security_mmap_addr+0x7d/0xa0 [ 41.716114] ? get_unmapped_area+0x1f5/0x3f0 [ 41.716708] do_mmap+0x854/0xf00 [ 41.717146] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.717661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.718228] ksys_mmap_pgoff+0x3af/0x500 [ 41.718754] do_syscall_64+0x3f/0x90 [ 41.719238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.719882] RIP: 0033:0x7f7aa2363d82 [ 41.720339] 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 [ 41.722503] RSP: 002b:00007fffc79e6418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.723420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7aa2363d82 [ 41.724283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7aa179d000 [ 41.725156] RBP: 00007f7aa179d000 R08: 0000000000000009 R09: 0000000000001000 [ 41.726007] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641a344ad90 [ 41.726868] R13: 00007fffc79e6430 R14: 00007fffc79e6460 R15: 00007fffc79e67c0 [ 41.727741] [ 41.728039] [ 41.728258] Allocated by task 212: [ 41.728706] kasan_save_stack+0x22/0x50 [ 41.729217] kasan_set_track+0x25/0x30 [ 41.729708] __kasan_slab_alloc+0x59/0x70 [ 41.730238] kmem_cache_alloc+0x16b/0x370 [ 41.730767] vm_area_dup+0x20/0x160 [ 41.731223] __split_vma+0x170/0x950 [ 41.731698] split_vma+0xc6/0x110 [ 41.732150] mprotect_fixup+0x8d2/0xb30 [ 41.732664] do_mprotect_pkey+0x87e/0xd40 [ 41.733191] __x64_sys_mprotect+0x78/0xc0 [ 41.733715] do_syscall_64+0x3f/0x90 [ 41.734187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.734833] [ 41.735051] Freed by task 202: [ 41.735454] kasan_save_stack+0x22/0x50 [ 41.735960] kasan_set_track+0x25/0x30 [ 41.736451] kasan_save_free_info+0x2b/0x50 [ 41.737001] __kasan_slab_free+0x10a/0x190 [ 41.737535] kmem_cache_free+0x10d/0x4d0 [ 41.738045] rcu_core+0x8c8/0x2860 [ 41.738489] __do_softirq+0x1b7/0x7d4 [ 41.738965] [ 41.739190] Last potentially related work creation: [ 41.739777] kasan_save_stack+0x22/0x50 [ 41.740282] __kasan_record_aux_stack+0x8e/0xa0 [ 41.740887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.741642] remove_vma+0x139/0x170 [ 41.742095] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.742652] do_vmi_munmap+0x1f1/0x2b0 [ 41.743146] __vm_munmap+0x138/0x3a0 [ 41.743613] __x64_sys_munmap+0x59/0x80 [ 41.744116] do_syscall_64+0x3f/0x90 [ 41.744585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.745257] [ 41.745473] The buggy address belongs to the object at ffff88800cb7a740 [ 41.745473] which belongs to the cache vm_area_struct of size 168 [ 41.746944] The buggy address is located 88 bytes inside of [ 41.746944] freed 168-byte region [ffff88800cb7a740, ffff88800cb7a7e8) [ 41.748357] [ 41.748573] The buggy address belongs to the physical page: [ 41.749261] page:000000000ff02eea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb7a [ 41.750387] memcg:ffff88801777e101 [ 41.750822] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.751475] page_type: 0xffffffff() [ 41.751932] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.752878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801777e101 [ 41.753809] page dumped because: kasan: bad access detected [ 41.754483] [ 41.754709] Memory state around the buggy address: [ 41.755303] ffff88800cb7a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.756179] ffff88800cb7a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.757068] >ffff88800cb7a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.757961] ^ [ 41.758483] ffff88800cb7a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.759330] ffff88800cb7a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.760196] ================================================================== [ 41.761187] Disabling lock debugging due to kernel taint [ 43.857368] BUG: Bad rss-counter state mm:00000000e3d05490 type:MM_FILEPAGES val:33 [ 43.858542] BUG: Bad rss-counter state mm:00000000e3d05490 type:MM_ANONPAGES val:22 [ 44.313077] BUG: Bad rss-counter state mm:00000000dd63c6b4 type:MM_FILEPAGES val:33 [ 44.314265] BUG: Bad rss-counter state mm:00000000dd63c6b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38991' (ECDSA) to the list of known hosts. 2023/06/19 21:27:31 fuzzer started 2023/06/19 21:27:32 dialing manager at localhost:44161 2023/06/19 21:27:32 checking machine... 2023/06/19 21:27:32 checking revisions... [ 44.937549] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:27:32 testing simple program... [ 44.998438] cgroup: Unknown subsys name 'net' [ 45.036241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000033a8a7a2 RCX=ffffffff8217807a RDX=ffff88801774b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800a377ca0 RSP=ffff88800a377b70 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=000000001256669d R14=000000001256669d R15=000000001256669d RIP=ffffffff814c07e0 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 00007f1b6b402900 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=00007ffd9f9c4000 CR3=000000000ee6c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f5c277e7e80 CR3=000000000fb74000 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=2031333a37323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a37323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000