syzkaller login: [ 39.538374] BUG: Bad rss-counter state mm:00000000de091133 type:MM_FILEPAGES val:33 [ 39.539409] BUG: Bad rss-counter state mm:00000000de091133 type:MM_ANONPAGES val:22 [ 39.704320] ================================================================== [ 39.705249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.706177] Read of size 8 at addr ffff88801a6c83f8 by task sshd/220 [ 39.706937] [ 39.707155] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.708129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.709131] Call Trace: [ 39.709449] [ 39.709741] dump_stack_lvl+0x91/0xf0 [ 39.710248] print_report+0xcc/0x620 [ 39.710737] ? __virt_addr_valid+0x102/0x340 [ 39.711295] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.711930] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.712551] kasan_report+0xbe/0xf0 [ 39.713053] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.713685] vma_interval_tree_remove+0xc75/0xec0 [ 39.714298] vma_prepare+0xc54/0x11a0 [ 39.714776] __split_vma+0x5af/0x950 [ 39.715262] ? __pfx___split_vma+0x10/0x10 [ 39.715790] ? find_held_lock+0x2c/0x110 [ 39.716327] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.716910] ? lock_is_held_type+0x9f/0x120 [ 39.717504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.718127] ? mtree_range_walk+0x632/0x900 [ 39.718678] ? mas_walk+0x5c7/0x7c0 [ 39.719162] do_vmi_munmap+0x1f1/0x2b0 [ 39.719652] mmap_region+0x1f9/0x2660 [ 39.720149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.720690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.721445] ? __pfx_lock_acquire+0x10/0x10 [ 39.721979] ? __pfx_mmap_region+0x10/0x10 [ 39.722503] ? security_mmap_addr+0x7d/0xa0 [ 39.723030] ? get_unmapped_area+0x1f5/0x3f0 [ 39.723570] do_mmap+0x854/0xf00 [ 39.724002] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.724493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.725060] ksys_mmap_pgoff+0x3af/0x500 [ 39.725558] do_syscall_64+0x3f/0x90 [ 39.726041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.726687] RIP: 0033:0x7f9b68e91d82 [ 39.727146] 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 [ 39.729275] RSP: 002b:00007fff5eff8fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.730161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b68e91d82 [ 39.731000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b682cb000 [ 39.731844] RBP: 00007f9b682cb000 R08: 0000000000000009 R09: 0000000000001000 [ 39.732777] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565310343ec0 [ 39.733930] R13: 00007fff5eff9000 R14: 00007fff5eff9030 R15: 00007fff5eff9390 [ 39.735082] [ 39.735476] [ 39.735768] Allocated by task 213: [ 39.736345] kasan_save_stack+0x22/0x50 [ 39.737076] kasan_set_track+0x25/0x30 [ 39.737795] __kasan_slab_alloc+0x59/0x70 [ 39.738502] kmem_cache_alloc+0x16b/0x370 [ 39.739195] vm_area_dup+0x20/0x160 [ 39.739801] __split_vma+0x170/0x950 [ 39.740419] split_vma+0xc6/0x110 [ 39.741032] mprotect_fixup+0x8d2/0xb30 [ 39.741709] do_mprotect_pkey+0x87e/0xd40 [ 39.742396] __x64_sys_mprotect+0x78/0xc0 [ 39.743090] do_syscall_64+0x3f/0x90 [ 39.743727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.744598] [ 39.744884] Freed by task 19: [ 39.745397] kasan_save_stack+0x22/0x50 [ 39.746074] kasan_set_track+0x25/0x30 [ 39.746748] kasan_save_free_info+0x2b/0x50 [ 39.747470] __kasan_slab_free+0x10a/0x190 [ 39.748193] kmem_cache_free+0x10d/0x4d0 [ 39.748892] rcu_core+0x8c8/0x2860 [ 39.749487] __do_softirq+0x1b7/0x7d4 [ 39.750121] [ 39.750405] Last potentially related work creation: [ 39.751194] kasan_save_stack+0x22/0x50 [ 39.751876] __kasan_record_aux_stack+0x8e/0xa0 [ 39.752670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.753527] remove_vma+0x139/0x170 [ 39.754142] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.754888] do_vmi_munmap+0x1f1/0x2b0 [ 39.755538] __vm_munmap+0x138/0x3a0 [ 39.756167] __x64_sys_munmap+0x59/0x80 [ 39.756786] do_syscall_64+0x3f/0x90 [ 39.757258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.757895] [ 39.758106] The buggy address belongs to the object at ffff88801a6c83a0 [ 39.758106] which belongs to the cache vm_area_struct of size 168 [ 39.759558] The buggy address is located 88 bytes inside of [ 39.759558] freed 168-byte region [ffff88801a6c83a0, ffff88801a6c8448) [ 39.760973] [ 39.761189] The buggy address belongs to the physical page: [ 39.761845] page:000000007bdab29a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a6c8 [ 39.762930] memcg:ffff88801a6c1201 [ 39.763357] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.764009] page_type: 0xffffffff() [ 39.764463] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.765395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a6c1201 [ 39.766309] page dumped because: kasan: bad access detected [ 39.766981] [ 39.767195] Memory state around the buggy address: [ 39.767777] ffff88801a6c8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.768645] ffff88801a6c8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.769508] >ffff88801a6c8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.770349] ^ [ 39.771192] ffff88801a6c8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.772042] ffff88801a6c8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.772939] ================================================================== [ 39.774015] Disabling lock debugging due to kernel taint [ 41.663824] BUG: Bad rss-counter state mm:0000000008e4d0ec type:MM_FILEPAGES val:33 [ 41.664850] BUG: Bad rss-counter state mm:0000000008e4d0ec type:MM_ANONPAGES val:22 [ 42.220348] BUG: Bad rss-counter state mm:000000000ebdb3bb type:MM_FILEPAGES val:33 [ 42.221569] BUG: Bad rss-counter state mm:000000000ebdb3bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31553' (ECDSA) to the list of known hosts. 2023/06/20 05:53:44 fuzzer started 2023/06/20 05:53:45 dialing manager at localhost:44161 2023/06/20 05:53:45 checking machine... 2023/06/20 05:53:45 checking revisions... [ 42.860854] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:53:45 testing simple program... [ 42.914855] cgroup: Unknown subsys name 'net' [ 42.952545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d907898 RCX=000000000000000a RDX=ffff88800e9b8000 RSI=ffffffff83868cfa RDI=ffff88800d9078d0 RBP=ffff88800ef85000 RSP=ffff88800d907830 R8 =0000000000000004 R9 =000000000001a000 R10=0000000000000000 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801650bf40 R14=ffff88800d907a88 R15=ffff88800ef85600 RIP=ffffffff83868d09 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 00007fed62a0a900 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=00007ffc78e3b000 CR3=000000001bc8c000 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=00007f565a579520 CR3=000000000d754000 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=2034343a33353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000