syzkaller login: [ 60.462481] BUG: Bad rss-counter state mm:000000008f557fe2 type:MM_FILEPAGES val:33 [ 60.464210] BUG: Bad rss-counter state mm:000000008f557fe2 type:MM_ANONPAGES val:22 [ 60.663978] ================================================================== [ 60.665129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.666303] Read of size 8 at addr ffff888018fc6798 by task sshd/225 [ 60.667287] [ 60.667508] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.668366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.669339] Call Trace: [ 60.669660] [ 60.669956] dump_stack_lvl+0x91/0xf0 [ 60.670446] print_report+0xcc/0x620 [ 60.670931] ? __virt_addr_valid+0x102/0x340 [ 60.671495] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.672118] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.672731] kasan_report+0xbe/0xf0 [ 60.673213] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.673848] vma_interval_tree_remove+0xc75/0xec0 [ 60.674458] vma_prepare+0xc54/0x11a0 [ 60.674935] __split_vma+0x5af/0x950 [ 60.675407] ? __pfx___split_vma+0x10/0x10 [ 60.675947] ? find_held_lock+0x2c/0x110 [ 60.676472] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.677047] ? lock_is_held_type+0x9f/0x120 [ 60.677584] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.678216] ? mtree_range_walk+0x632/0x900 [ 60.678774] ? mas_walk+0x5c7/0x7c0 [ 60.679251] do_vmi_munmap+0x1f1/0x2b0 [ 60.679757] mmap_region+0x1f9/0x2660 [ 60.680243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.680754] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.681466] ? __pfx_lock_acquire+0x10/0x10 [ 60.682016] ? __pfx_mmap_region+0x10/0x10 [ 60.682548] ? security_mmap_addr+0x7d/0xa0 [ 60.683074] ? get_unmapped_area+0x1f5/0x3f0 [ 60.683640] do_mmap+0x854/0xf00 [ 60.684080] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.684576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.685140] ksys_mmap_pgoff+0x3af/0x500 [ 60.685646] do_syscall_64+0x3f/0x90 [ 60.686134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.686778] RIP: 0033:0x7f3c07674d82 [ 60.687230] 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 [ 60.689362] RSP: 002b:00007ffccfbdaea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.690285] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c07674d82 [ 60.691132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c06aae000 [ 60.691979] RBP: 00007f3c06aae000 R08: 0000000000000009 R09: 0000000000001000 [ 60.692833] R10: 0000000000000812 R11: 0000000000000206 R12: 000056047f367ec0 [ 60.693682] R13: 00007ffccfbdaec0 R14: 00007ffccfbdaef0 R15: 00007ffccfbdb250 [ 60.694555] [ 60.694848] [ 60.695065] Allocated by task 218: [ 60.695491] kasan_save_stack+0x22/0x50 [ 60.695994] kasan_set_track+0x25/0x30 [ 60.696490] __kasan_slab_alloc+0x59/0x70 [ 60.697013] kmem_cache_alloc+0x16b/0x370 [ 60.697534] vm_area_dup+0x20/0x160 [ 60.698022] __split_vma+0x170/0x950 [ 60.698504] split_vma+0xc6/0x110 [ 60.698944] mprotect_fixup+0x8d2/0xb30 [ 60.699447] do_mprotect_pkey+0x87e/0xd40 [ 60.699975] __x64_sys_mprotect+0x78/0xc0 [ 60.700492] do_syscall_64+0x3f/0x90 [ 60.700972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.701617] [ 60.701831] Freed by task 218: [ 60.702241] kasan_save_stack+0x22/0x50 [ 60.702750] kasan_set_track+0x25/0x30 [ 60.703244] kasan_save_free_info+0x2b/0x50 [ 60.703787] __kasan_slab_free+0x10a/0x190 [ 60.704321] kmem_cache_free+0x10d/0x4d0 [ 60.704837] rcu_core+0x8c8/0x2860 [ 60.705289] __do_softirq+0x1b7/0x7d4 [ 60.705784] [ 60.706017] Last potentially related work creation: [ 60.706611] kasan_save_stack+0x22/0x50 [ 60.707114] __kasan_record_aux_stack+0x8e/0xa0 [ 60.707687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.708414] remove_vma+0x139/0x170 [ 60.708873] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.709432] do_vmi_munmap+0x1f1/0x2b0 [ 60.709948] __vm_munmap+0x138/0x3a0 [ 60.710416] __x64_sys_munmap+0x59/0x80 [ 60.710913] do_syscall_64+0x3f/0x90 [ 60.711388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.712047] [ 60.712261] The buggy address belongs to the object at ffff888018fc6740 [ 60.712261] which belongs to the cache vm_area_struct of size 168 [ 60.713746] The buggy address is located 88 bytes inside of [ 60.713746] freed 168-byte region [ffff888018fc6740, ffff888018fc67e8) [ 60.715165] [ 60.715380] The buggy address belongs to the physical page: [ 60.716033] page:000000000a5a1dc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fc6 [ 60.717124] memcg:ffff88800dc1e301 [ 60.717551] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.718211] page_type: 0xffffffff() [ 60.718663] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.719580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc1e301 [ 60.720489] page dumped because: kasan: bad access detected [ 60.721152] [ 60.721370] Memory state around the buggy address: [ 60.721966] ffff888018fc6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.722831] ffff888018fc6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.723688] >ffff888018fc6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.724536] ^ [ 60.725032] ffff888018fc6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.725892] ffff888018fc6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.726751] ================================================================== [ 60.727723] Disabling lock debugging due to kernel taint [ 62.747084] BUG: Bad rss-counter state mm:00000000e84b9325 type:MM_FILEPAGES val:33 [ 62.748336] BUG: Bad rss-counter state mm:00000000e84b9325 type:MM_ANONPAGES val:22 [ 63.175447] BUG: Bad rss-counter state mm:000000001a48d5a0 type:MM_FILEPAGES val:33 [ 63.176794] BUG: Bad rss-counter state mm:000000001a48d5a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26384' (ECDSA) to the list of known hosts. 2023/06/20 15:41:25 fuzzer started 2023/06/20 15:41:26 dialing manager at localhost:36067 2023/06/20 15:41:26 checking machine... 2023/06/20 15:41:26 checking revisions... [ 63.730445] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:41:26 testing simple program... [ 63.788279] cgroup: Unknown subsys name 'net' [ 63.829918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:41:25 Registers: info registers vcpu 0 RAX=ffffffff864b202f RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff864b202e RBP=ffff888018e47468 RSP=ffff888018e473a0 R8 =0000000000000001 R9 =ffff888018e47450 R10=0000000000038001 R11=00000000000b5080 R12=ffff888018e47470 R13=ffff888018e47458 R14=ffff888018e47f58 R15=ffff888018e47410 RIP=ffffffff811311e5 RFL=00000297 [--S-APC] 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 00007f4111237900 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=00007ffc6e61e000 CR3=000000000c694000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fa2b776d3f0 CR3=000000001a00e000 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=2035323a31343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a31343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000