syzkaller login: [ 30.938803] BUG: Bad rss-counter state mm:0000000041f6a63d type:MM_FILEPAGES val:33 [ 30.939502] BUG: Bad rss-counter state mm:0000000041f6a63d type:MM_ANONPAGES val:22 [ 31.068796] ================================================================== [ 31.069468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.070086] Read of size 8 at addr ffff888016ed14e0 by task sshd/221 [ 31.070595] [ 31.070744] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.071344] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.072020] Call Trace: [ 31.072235] <TASK> [ 31.072426] dump_stack_lvl+0x91/0xf0 [ 31.072772] print_report+0xcc/0x620 [ 31.073403] ? __virt_addr_valid+0x102/0x340 [ 31.073782] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074180] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074582] kasan_report+0xbe/0xf0 [ 31.074932] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075451] vma_interval_tree_remove+0xc75/0xec0 [ 31.075885] vma_prepare+0xc54/0x11a0 [ 31.076226] __split_vma+0x5af/0x950 [ 31.076562] ? __pfx___split_vma+0x10/0x10 [ 31.076971] ? find_held_lock+0x2c/0x110 [ 31.077330] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.077717] ? lock_is_held_type+0x9f/0x120 [ 31.078146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.078579] ? mtree_range_walk+0x632/0x900 [ 31.078975] ? mas_walk+0x5c7/0x7c0 [ 31.079311] do_vmi_munmap+0x1f1/0x2b0 [ 31.079648] mmap_region+0x1f9/0x2660 [ 31.079980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.080337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.080895] ? __pfx_lock_acquire+0x10/0x10 [ 31.081280] ? __pfx_mmap_region+0x10/0x10 [ 31.081663] ? security_mmap_addr+0x7d/0xa0 [ 31.082046] ? get_unmapped_area+0x1f5/0x3f0 [ 31.082412] do_mmap+0x854/0xf00 [ 31.082709] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.083054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.083457] ksys_mmap_pgoff+0x3af/0x500 [ 31.083792] do_syscall_64+0x3f/0x90 [ 31.084119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084543] RIP: 0033:0x7f21875f8d82 [ 31.084880] 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 [ 31.086276] RSP: 002b:00007ffee756b708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.086878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21875f8d82 [ 31.087434] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2186a32000 [ 31.087983] RBP: 00007f2186a32000 R08: 0000000000000009 R09: 0000000000001000 [ 31.088591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea5544eec0 [ 31.089162] R13: 00007ffee756b720 R14: 00007ffee756b750 R15: 00007ffee756bab0 [ 31.089720] </TASK> [ 31.089924] [ 31.090069] Allocated by task 214: [ 31.090372] kasan_save_stack+0x22/0x50 [ 31.090742] kasan_set_track+0x25/0x30 [ 31.091064] __kasan_slab_alloc+0x59/0x70 [ 31.091395] kmem_cache_alloc+0x16b/0x370 [ 31.091716] vm_area_dup+0x20/0x160 [ 31.092011] __split_vma+0x170/0x950 [ 31.092316] split_vma+0xc6/0x110 [ 31.092597] mprotect_fixup+0x8d2/0xb30 [ 31.092956] do_mprotect_pkey+0x87e/0xd40 [ 31.093327] __x64_sys_mprotect+0x78/0xc0 [ 31.093669] do_syscall_64+0x3f/0x90 [ 31.093996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094438] [ 31.094590] Freed by task 19: [ 31.094895] kasan_save_stack+0x22/0x50 [ 31.095266] kasan_set_track+0x25/0x30 [ 31.095635] kasan_save_free_info+0x2b/0x50 [ 31.096004] __kasan_slab_free+0x10a/0x190 [ 31.096357] kmem_cache_free+0x10d/0x4d0 [ 31.096702] rcu_core+0x8c8/0x2860 [ 31.097007] __do_softirq+0x1b7/0x7d4 [ 31.097382] [ 31.097539] Last potentially related work creation: [ 31.097947] kasan_save_stack+0x22/0x50 [ 31.098287] __kasan_record_aux_stack+0x8e/0xa0 [ 31.098678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.099129] remove_vma+0x139/0x170 [ 31.099436] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099812] do_vmi_munmap+0x1f1/0x2b0 [ 31.100159] __vm_munmap+0x138/0x3a0 [ 31.100478] __x64_sys_munmap+0x59/0x80 [ 31.100821] do_syscall_64+0x3f/0x90 [ 31.101178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.101595] [ 31.101737] Second to last potentially related work creation: [ 31.102204] kasan_save_stack+0x22/0x50 [ 31.102544] __kasan_record_aux_stack+0x8e/0xa0 [ 31.102942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.103387] remove_vma+0x139/0x170 [ 31.103739] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.104125] do_vmi_munmap+0x1f1/0x2b0 [ 31.104457] move_vma.constprop.0+0x88a/0x1ba0 [ 31.104893] __do_sys_mremap+0xb78/0x1780 [ 31.105256] do_syscall_64+0x3f/0x90 [ 31.105589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.106052] [ 31.106193] The buggy address belongs to the object at ffff888016ed1488 [ 31.106193] which belongs to the cache vm_area_struct of size 168 [ 31.107191] The buggy address is located 88 bytes inside of [ 31.107191] freed 168-byte region [ffff888016ed1488, ffff888016ed1530) [ 31.108120] [ 31.108268] The buggy address belongs to the physical page: [ 31.108722] page:000000001de3883a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ed1 [ 31.109538] memcg:ffff888016de9c01 [ 31.109834] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.110319] page_type: 0xffffffff() [ 31.110631] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 31.111256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016de9c01 [ 31.111882] page dumped because: kasan: bad access detected [ 31.112340] [ 31.112488] Memory state around the buggy address: [ 31.112925] ffff888016ed1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.113551] ffff888016ed1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.114181] >ffff888016ed1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.114767] ^ [ 31.115295] ffff888016ed1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.115849] ffff888016ed1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.116431] ================================================================== [ 31.117223] Disabling lock debugging due to kernel taint [ 32.781469] BUG: Bad rss-counter state mm:0000000055b23687 type:MM_FILEPAGES val:33 [ 32.782224] BUG: Bad rss-counter state mm:0000000055b23687 type:MM_ANONPAGES val:22 [ 33.074912] BUG: Bad rss-counter state mm:000000002f682fa1 type:MM_FILEPAGES val:33 [ 33.076116] BUG: Bad rss-counter state mm:000000002f682fa1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50541' (ECDSA) to the list of known hosts. 2023/06/21 09:29:07 fuzzer started 2023/06/21 09:29:07 dialing manager at localhost:36067 2023/06/21 09:29:07 checking machine... 2023/06/21 09:29:07 checking revisions... [ 33.664166] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:29:07 testing simple program... [ 33.698937] cgroup: Unknown subsys name 'net' [ 33.740261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055d67b506d60 RCX=ffffffffffffffff RDX=00007fc074ff8000 RSI=000055d67b508428 RDI=0000000000000000 RBP=000055d67b5103d0 RSP=00007fffe80a71e0 R8 =0000000000000000 R9 =00007fc074d3dbe0 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00000000fffffffa R14=000055d67b5103d0 R15=00000000fffffffe RIP=00007fc074f36f6c RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc0743b4900 00000000 00000000 GS =0000 0000000000000000 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=00007fc0738d3028 CR3=000000000f290000 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=e7883f70bea0519300000000000ae988 XMM05=31359982641b30ba0000000000133d38 XMM06=e4cb8bb95a7664b60000000000132bf0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000018 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e1387 RSP=ffff88806cf09c20 R8 =ffffffff85497f20 R9 =ffffffffffffffff R10=ffffffffffffffff R11=000000168433e014 R12=ffffffff8562be48 R13=ffffffff813cb3a1 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff8180fea0 RFL=00000056 [---ZAP-] 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 00007f6d5850d900 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=00007ffedb339000 CR3=0000000009a1c000 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=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