syzkaller login: [ 39.372714] BUG: Bad rss-counter state mm:00000000285475a0 type:MM_FILEPAGES val:33 [ 39.374427] BUG: Bad rss-counter state mm:00000000285475a0 type:MM_ANONPAGES val:22 [ 39.531531] ================================================================== [ 39.532520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.533453] Read of size 8 at addr ffff88800e4713f8 by task sshd/220 [ 39.534328] [ 39.534545] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.535413] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.536392] Call Trace: [ 39.536711] [ 39.536991] dump_stack_lvl+0x91/0xf0 [ 39.537481] print_report+0xcc/0x620 [ 39.537979] ? __virt_addr_valid+0x102/0x340 [ 39.538537] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.539158] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.539778] kasan_report+0xbe/0xf0 [ 39.540256] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.540876] vma_interval_tree_remove+0xc75/0xec0 [ 39.541490] vma_prepare+0xc54/0x11a0 [ 39.541970] __split_vma+0x5af/0x950 [ 39.542436] ? __pfx___split_vma+0x10/0x10 [ 39.542961] ? find_held_lock+0x2c/0x110 [ 39.543497] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.544061] ? lock_is_held_type+0x9f/0x120 [ 39.544592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.545191] ? mtree_range_walk+0x632/0x900 [ 39.545738] ? mas_walk+0x5c7/0x7c0 [ 39.546207] do_vmi_munmap+0x1f1/0x2b0 [ 39.546698] mmap_region+0x1f9/0x2660 [ 39.547184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.547689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.548398] ? __pfx_lock_acquire+0x10/0x10 [ 39.548932] ? __pfx_mmap_region+0x10/0x10 [ 39.549457] ? security_mmap_addr+0x7d/0xa0 [ 39.549987] ? get_unmapped_area+0x1f5/0x3f0 [ 39.550538] do_mmap+0x854/0xf00 [ 39.550975] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.551494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.552053] ksys_mmap_pgoff+0x3af/0x500 [ 39.552554] do_syscall_64+0x3f/0x90 [ 39.553024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.553666] RIP: 0033:0x7ffbf7595d82 [ 39.554120] 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 [ 39.556230] RSP: 002b:00007ffdc8aa2798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.557126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbf7595d82 [ 39.557962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbf69cf000 [ 39.558802] RBP: 00007ffbf69cf000 R08: 0000000000000009 R09: 0000000000001000 [ 39.559661] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631a8a70f70 [ 39.560501] R13: 00007ffdc8aa27b0 R14: 00007ffdc8aa27e0 R15: 00007ffdc8aa2b40 [ 39.561351] [ 39.561645] [ 39.561857] Allocated by task 213: [ 39.562287] kasan_save_stack+0x22/0x50 [ 39.562784] kasan_set_track+0x25/0x30 [ 39.563287] __kasan_slab_alloc+0x59/0x70 [ 39.563803] kmem_cache_alloc+0x16b/0x370 [ 39.564315] vm_area_dup+0x20/0x160 [ 39.564763] __split_vma+0x170/0x950 [ 39.565221] split_vma+0xc6/0x110 [ 39.565652] mprotect_fixup+0x8d2/0xb30 [ 39.566160] do_mprotect_pkey+0x87e/0xd40 [ 39.566677] __x64_sys_mprotect+0x78/0xc0 [ 39.567203] do_syscall_64+0x3f/0x90 [ 39.567669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.568302] [ 39.568513] Freed by task 19: [ 39.568899] kasan_save_stack+0x22/0x50 [ 39.569399] kasan_set_track+0x25/0x30 [ 39.569889] kasan_save_free_info+0x2b/0x50 [ 39.570426] __kasan_slab_free+0x10a/0x190 [ 39.570963] kmem_cache_free+0x10d/0x4d0 [ 39.571491] rcu_core+0x8c8/0x2860 [ 39.571928] __do_softirq+0x1b7/0x7d4 [ 39.572400] [ 39.572616] Last potentially related work creation: [ 39.573211] kasan_save_stack+0x22/0x50 [ 39.573715] __kasan_record_aux_stack+0x8e/0xa0 [ 39.574283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.574926] remove_vma+0x139/0x170 [ 39.575387] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.575946] do_vmi_munmap+0x1f1/0x2b0 [ 39.576433] __vm_munmap+0x138/0x3a0 [ 39.576904] __x64_sys_munmap+0x59/0x80 [ 39.577402] do_syscall_64+0x3f/0x90 [ 39.577876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.578512] [ 39.578725] The buggy address belongs to the object at ffff88800e4713a0 [ 39.578725] which belongs to the cache vm_area_struct of size 168 [ 39.580194] The buggy address is located 88 bytes inside of [ 39.580194] freed 168-byte region [ffff88800e4713a0, ffff88800e471448) [ 39.581580] [ 39.581799] The buggy address belongs to the physical page: [ 39.582450] page:000000006b0b3fef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe471 [ 39.583536] memcg:ffff88800f0f4201 [ 39.583965] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.584663] page_type: 0xffffffff() [ 39.585115] raw: 0100000000000200 ffff88800879fc80 ffffea00005049c0 dead000000000003 [ 39.586032] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0f4201 [ 39.586928] page dumped because: kasan: bad access detected [ 39.587596] [ 39.587809] Memory state around the buggy address: [ 39.588380] ffff88800e471280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.589224] ffff88800e471300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.590094] >ffff88800e471380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.590975] ^ [ 39.591843] ffff88800e471400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.592732] ffff88800e471480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.593622] ================================================================== [ 39.594661] Disabling lock debugging due to kernel taint [ 41.498705] BUG: Bad rss-counter state mm:00000000872f6615 type:MM_FILEPAGES val:33 [ 41.499724] BUG: Bad rss-counter state mm:00000000872f6615 type:MM_ANONPAGES val:22 [ 41.917640] BUG: Bad rss-counter state mm:00000000a3b3e767 type:MM_FILEPAGES val:33 [ 41.919675] BUG: Bad rss-counter state mm:00000000a3b3e767 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42754' (ECDSA) to the list of known hosts. 2023/06/20 01:41:50 fuzzer started 2023/06/20 01:41:50 dialing manager at localhost:44161 2023/06/20 01:41:50 checking machine... 2023/06/20 01:41:50 checking revisions... [ 42.658688] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:41:50 testing simple program... [ 42.701969] cgroup: Unknown subsys name 'net' [ 42.740983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:40 Registers: info registers vcpu 0 RAX=ffffffff8186c1c5 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880142dfa08 RSI=ffffffff8186c1c5 RDI=ffff8880142df9c0 RBP=ffff8880142dfa18 RSP=ffff8880142df950 R8 =0000000000000001 R9 =ffff8880142dfa00 R10=0000000000038001 R11=0000000000038dbb R12=ffff8880142dfa88 R13=ffff8880142dfa08 R14=ffff88800b841b40 R15=ffff8880142df9c0 RIP=ffffffff81130641 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 00007f51c0b84900 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=00007fad7c7a8650 CR3=000000000dc74000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=51d83873c507727c00000000000ae988 XMM05=fbe7d6a0597870d20000000000134dc8 XMM06=4fda316b135da52b0000000000133bb8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffe088b48a8 CR3=000000000e5e4000 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=2039343a31343a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31343a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000