syzkaller login: [ 40.084551] BUG: Bad rss-counter state mm:00000000cf1728bd type:MM_FILEPAGES val:33 [ 40.085971] BUG: Bad rss-counter state mm:00000000cf1728bd type:MM_ANONPAGES val:22 [ 40.208758] ================================================================== [ 40.209677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.210623] Read of size 8 at addr ffff888019de0df0 by task sshd/218 [ 40.211392] [ 40.211610] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.212618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.213599] Call Trace: [ 40.213918] [ 40.214205] dump_stack_lvl+0x91/0xf0 [ 40.214691] print_report+0xcc/0x620 [ 40.215202] ? __virt_addr_valid+0x102/0x340 [ 40.215759] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.216370] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.216988] kasan_report+0xbe/0xf0 [ 40.217468] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.218095] vma_interval_tree_remove+0xc75/0xec0 [ 40.218705] vma_prepare+0xc54/0x11a0 [ 40.219197] __split_vma+0x5af/0x950 [ 40.219677] ? __pfx___split_vma+0x10/0x10 [ 40.220204] ? find_held_lock+0x2c/0x110 [ 40.220723] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.221287] ? lock_is_held_type+0x9f/0x120 [ 40.221828] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.222432] ? mtree_range_walk+0x632/0x900 [ 40.222984] ? mas_walk+0x5c7/0x7c0 [ 40.223462] do_vmi_munmap+0x1f1/0x2b0 [ 40.223953] mmap_region+0x1f9/0x2660 [ 40.224431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.224941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.225656] ? __pfx_lock_acquire+0x10/0x10 [ 40.226190] ? __pfx_mmap_region+0x10/0x10 [ 40.226722] ? security_mmap_addr+0x7d/0xa0 [ 40.227273] ? get_unmapped_area+0x1f5/0x3f0 [ 40.227832] do_mmap+0x854/0xf00 [ 40.228269] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.228767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.229324] ksys_mmap_pgoff+0x3af/0x500 [ 40.229837] do_syscall_64+0x3f/0x90 [ 40.230310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.230962] RIP: 0033:0x7fd90037ad82 [ 40.231418] 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 [ 40.233546] RSP: 002b:00007fffd11863f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.234469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd90037ad82 [ 40.235339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8ff7b4000 [ 40.236197] RBP: 00007fd8ff7b4000 R08: 0000000000000009 R09: 0000000000001000 [ 40.237067] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9385b6d90 [ 40.237932] R13: 00007fffd1186410 R14: 00007fffd1186440 R15: 00007fffd11867a0 [ 40.238800] [ 40.239115] [ 40.239335] Allocated by task 211: [ 40.239770] kasan_save_stack+0x22/0x50 [ 40.240274] kasan_set_track+0x25/0x30 [ 40.240766] __kasan_slab_alloc+0x59/0x70 [ 40.241302] kmem_cache_alloc+0x16b/0x370 [ 40.241824] vm_area_dup+0x20/0x160 [ 40.242282] __split_vma+0x170/0x950 [ 40.242758] split_vma+0xc6/0x110 [ 40.243210] mprotect_fixup+0x8d2/0xb30 [ 40.243719] do_mprotect_pkey+0x87e/0xd40 [ 40.244245] __x64_sys_mprotect+0x78/0xc0 [ 40.244781] do_syscall_64+0x3f/0x90 [ 40.245260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.245905] [ 40.246120] Freed by task 211: [ 40.246512] kasan_save_stack+0x22/0x50 [ 40.247030] kasan_set_track+0x25/0x30 [ 40.247525] kasan_save_free_info+0x2b/0x50 [ 40.248065] __kasan_slab_free+0x10a/0x190 [ 40.248605] kmem_cache_free+0x10d/0x4d0 [ 40.249117] rcu_core+0x8c8/0x2860 [ 40.249574] __do_softirq+0x1b7/0x7d4 [ 40.250051] [ 40.250271] Last potentially related work creation: [ 40.250885] kasan_save_stack+0x22/0x50 [ 40.251389] __kasan_record_aux_stack+0x8e/0xa0 [ 40.251974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.252626] remove_vma+0x139/0x170 [ 40.253165] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.253731] do_vmi_munmap+0x1f1/0x2b0 [ 40.254227] __vm_munmap+0x138/0x3a0 [ 40.254694] __x64_sys_munmap+0x59/0x80 [ 40.255200] do_syscall_64+0x3f/0x90 [ 40.255678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.256326] [ 40.256544] Second to last potentially related work creation: [ 40.257234] kasan_save_stack+0x22/0x50 [ 40.257748] __kasan_record_aux_stack+0x8e/0xa0 [ 40.258324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.258988] remove_vma+0x139/0x170 [ 40.259442] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.260009] do_vmi_munmap+0x1f1/0x2b0 [ 40.260499] mmap_region+0x1f9/0x2660 [ 40.260974] do_mmap+0x854/0xf00 [ 40.261407] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.261895] ksys_mmap_pgoff+0x3af/0x500 [ 40.262400] do_syscall_64+0x3f/0x90 [ 40.262893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.263538] [ 40.263758] The buggy address belongs to the object at ffff888019de0d98 [ 40.263758] which belongs to the cache vm_area_struct of size 168 [ 40.265237] The buggy address is located 88 bytes inside of [ 40.265237] freed 168-byte region [ffff888019de0d98, ffff888019de0e40) [ 40.266648] [ 40.266872] The buggy address belongs to the physical page: [ 40.267534] page:0000000025f722a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19de0 [ 40.268630] memcg:ffff888019de4501 [ 40.269065] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.269716] page_type: 0xffffffff() [ 40.270173] raw: 0100000000000200 ffff88800879fc80 ffffea0000258340 dead000000000004 [ 40.271119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019de4501 [ 40.272045] page dumped because: kasan: bad access detected [ 40.272710] [ 40.272926] Memory state around the buggy address: [ 40.273518] ffff888019de0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.274391] ffff888019de0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.275258] >ffff888019de0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.276123] ^ [ 40.276935] ffff888019de0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.277794] ffff888019de0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.278654] ================================================================== [ 40.279583] Disabling lock debugging due to kernel taint [ 42.728513] BUG: Bad rss-counter state mm:00000000c3b7d5d2 type:MM_FILEPAGES val:33 [ 42.729710] BUG: Bad rss-counter state mm:00000000c3b7d5d2 type:MM_ANONPAGES val:22 [ 43.207886] BUG: Bad rss-counter state mm:000000001674ffe5 type:MM_FILEPAGES val:33 [ 43.208860] BUG: Bad rss-counter state mm:000000001674ffe5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12106' (ECDSA) to the list of known hosts. 2023/06/19 21:08:02 fuzzer started 2023/06/19 21:08:02 dialing manager at localhost:44161 2023/06/19 21:08:02 checking machine... 2023/06/19 21:08:02 checking revisions... [ 43.842180] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:08:02 testing simple program... [ 43.893571] cgroup: Unknown subsys name 'net' [ 43.941112] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:01 Registers: info registers vcpu 0 RAX=000055c1cbd93f70 RBX=000055c1cbd7c8c0 RCX=0000000000000010 RDX=00000000fbad2488 RSI=000000000000002c RDI=000055c1cbd93f70 RBP=000055c1cbd76350 RSP=00007fffd34291a8 R8 =0000000000000008 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000246 R12=000055c1cbd93f70 R13=00007fffd34291b8 R14=00007f8373d3eb22 R15=0000000000000000 RIP=00007f83741d3752 RFL=00000202 [-------] 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 00007f8373d63900 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=00007fffd3423000 CR3=000000000eab2000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007fa78b5128d0 CR3=0000000013b70000 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=f1a51e7fe2a996a4ee49411f8f0d5b8f XMM02=2c67c8bc2e329bc3000000000011eac0 XMM03=fb795ef6d65770560000000000124cc8 XMM04=98218dc837454be400000000000ae988 XMM05=2660237fa6cc6bbe0000000000137198 XMM06=806171799158d9670000000000136238 XMM07=e042d86d42eb936e0000000000124f48 XMM08=453546caf5f0ef23000000000011eb20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000