syzkaller login: [ 233.873999] BUG: Bad rss-counter state mm:00000000bc076db3 type:MM_FILEPAGES val:33 [ 233.875020] BUG: Bad rss-counter state mm:00000000bc076db3 type:MM_ANONPAGES val:22 [ 234.049230] ================================================================== [ 234.050294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 234.051465] Read of size 8 at addr ffff88801a7e85c8 by task sshd/220 [ 234.052395] [ 234.052647] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 234.053843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 234.054956] Call Trace: [ 234.055320] [ 234.055669] dump_stack_lvl+0x91/0xf0 [ 234.056226] print_report+0xcc/0x620 [ 234.056781] ? __virt_addr_valid+0x102/0x340 [ 234.057411] ? vma_interval_tree_remove+0xc75/0xec0 [ 234.058086] ? vma_interval_tree_remove+0xc75/0xec0 [ 234.058726] kasan_report+0xbe/0xf0 [ 234.059211] ? vma_interval_tree_remove+0xc75/0xec0 [ 234.059853] vma_interval_tree_remove+0xc75/0xec0 [ 234.060501] vma_prepare+0xc54/0x11a0 [ 234.061048] __split_vma+0x5af/0x950 [ 234.061596] ? __pfx___split_vma+0x10/0x10 [ 234.062203] ? find_held_lock+0x2c/0x110 [ 234.062809] do_vmi_align_munmap+0x2ba/0x11f0 [ 234.063454] ? lock_is_held_type+0x9f/0x120 [ 234.064086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 234.064782] ? mtree_range_walk+0x632/0x900 [ 234.065416] ? mas_walk+0x5c7/0x7c0 [ 234.065962] do_vmi_munmap+0x1f1/0x2b0 [ 234.066529] mmap_region+0x1f9/0x2660 [ 234.067082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 234.067688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 234.068507] ? __pfx_lock_acquire+0x10/0x10 [ 234.069114] ? __pfx_mmap_region+0x10/0x10 [ 234.069724] ? security_mmap_addr+0x7d/0xa0 [ 234.070331] ? get_unmapped_area+0x1f5/0x3f0 [ 234.070964] do_mmap+0x854/0xf00 [ 234.071475] vm_mmap_pgoff+0x1a6/0x3a0 [ 234.072055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 234.072700] ksys_mmap_pgoff+0x3af/0x500 [ 234.073289] do_syscall_64+0x3f/0x90 [ 234.073838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 234.074583] RIP: 0033:0x7f0cf8ddcd82 [ 234.075114] 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 [ 234.077579] RSP: 002b:00007fffafce2e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 234.078620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cf8ddcd82 [ 234.079610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cf8216000 [ 234.080581] RBP: 00007f0cf8216000 R08: 0000000000000009 R09: 0000000000001000 [ 234.081560] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623535d8ec0 [ 234.082548] R13: 00007fffafce2ea0 R14: 00007fffafce2ed0 R15: 00007fffafce3230 [ 234.083560] [ 234.083904] [ 234.084152] Allocated by task 213: [ 234.084648] kasan_save_stack+0x22/0x50 [ 234.085233] kasan_set_track+0x25/0x30 [ 234.085801] __kasan_slab_alloc+0x59/0x70 [ 234.086411] kmem_cache_alloc+0x16b/0x370 [ 234.087008] vm_area_dup+0x20/0x160 [ 234.087542] __split_vma+0x170/0x950 [ 234.088086] split_vma+0xc6/0x110 [ 234.088599] mprotect_fixup+0x8d2/0xb30 [ 234.089193] do_mprotect_pkey+0x87e/0xd40 [ 234.089811] __x64_sys_mprotect+0x78/0xc0 [ 234.090415] do_syscall_64+0x3f/0x90 [ 234.090966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 234.091723] [ 234.091982] Freed by task 19: [ 234.092427] kasan_save_stack+0x22/0x50 [ 234.093089] kasan_set_track+0x25/0x30 [ 234.093665] kasan_save_free_info+0x2b/0x50 [ 234.094293] __kasan_slab_free+0x10a/0x190 [ 234.094921] kmem_cache_free+0x10d/0x4d0 [ 234.095531] rcu_core+0x8c8/0x2860 [ 234.096057] __do_softirq+0x1b7/0x7d4 [ 234.096621] [ 234.096879] Last potentially related work creation: [ 234.097567] kasan_save_stack+0x22/0x50 [ 234.098159] __kasan_record_aux_stack+0x8e/0xa0 [ 234.098834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 234.099596] remove_vma+0x139/0x170 [ 234.100113] do_vmi_align_munmap+0xd4a/0x11f0 [ 234.100757] do_vmi_munmap+0x1f1/0x2b0 [ 234.101323] __vm_munmap+0x138/0x3a0 [ 234.101860] __x64_sys_munmap+0x59/0x80 [ 234.102440] do_syscall_64+0x3f/0x90 [ 234.102962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 234.103622] [ 234.103838] The buggy address belongs to the object at ffff88801a7e8570 [ 234.103838] which belongs to the cache vm_area_struct of size 168 [ 234.105512] The buggy address is located 88 bytes inside of [ 234.105512] freed 168-byte region [ffff88801a7e8570, ffff88801a7e8618) [ 234.106985] [ 234.107246] The buggy address belongs to the physical page: [ 234.108049] page:00000000f23d4ce2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a7e8 [ 234.109365] memcg:ffff88800e69bd01 [ 234.109865] flags: 0x100000000000200(slab|node=0|zone=1) [ 234.110507] page_type: 0xffffffff() [ 234.110990] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 234.112070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e69bd01 [ 234.112970] page dumped because: kasan: bad access detected [ 234.113617] [ 234.113831] Memory state around the buggy address: [ 234.114401] ffff88801a7e8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 234.115251] ffff88801a7e8500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 234.116104] >ffff88801a7e8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 234.116946] ^ [ 234.117599] ffff88801a7e8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 234.118445] ffff88801a7e8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 234.119288] ================================================================== [ 234.120223] Disabling lock debugging due to kernel taint [ 236.261119] BUG: Bad rss-counter state mm:00000000255a08ab type:MM_FILEPAGES val:33 [ 236.262453] BUG: Bad rss-counter state mm:00000000255a08ab type:MM_ANONPAGES val:22 [ 236.692034] BUG: Bad rss-counter state mm:0000000054d6c1f9 type:MM_FILEPAGES val:33 [ 236.692816] BUG: Bad rss-counter state mm:0000000054d6c1f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54047' (ECDSA) to the list of known hosts. 2023/06/19 22:34:57 fuzzer started 2023/06/19 22:34:58 dialing manager at localhost:44161 2023/06/19 22:34:58 checking machine... 2023/06/19 22:34:58 checking revisions... [ 237.325848] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:34:58 testing simple program... [ 237.376840] cgroup: Unknown subsys name 'net' [ 237.407797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:31:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e23dbe0 RCX=ffff88800e23dbe0 RDX=00000000000d000a RSI=ffff88800e23dbe0 RDI=ffff88800844f780 RBP=ffff8880142af600 RSP=ffff8880142af560 R8 =00000000000d0009 R9 =0000000000000000 R10=ffffea0000388f40 R11=000000008010000d R12=ffffea0000388f40 R13=ffff88800e23d000 R14=00000000000d0009 R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fd617da0900 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=00007fd617235770 CR3=000000000d8ac000 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=2037353a34333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002cfbe9a RBX=0000000000000005 RCX=0000000000000001 RDX=00000000000928c0 RSI=000000000000000e RDI=ffff8880167df4d0 RBP=dffffc0000000000 RSP=ffff8880167df418 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000e R13=00000000000928c0 R14=ffff8880167df4a8 R15=0000000000002000 RIP=ffffffff813ad5ca 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 00007f56bb95f900 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=00007ffc87028000 CR3=000000000f032000 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