[ 63.924851] BUG: Bad rss-counter state mm:00000000644f87ff type:MM_FILEPAGES val:33 [ 63.926356] BUG: Bad rss-counter state mm:00000000644f87ff type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 64.080081] ================================================================== [ 64.081024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.081973] Read of size 8 at addr ffff88800e1c8310 by task sshd/219 [ 64.082735] [ 64.082960] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.083937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.084942] Call Trace: [ 64.085261] [ 64.085562] dump_stack_lvl+0x91/0xf0 [ 64.086052] print_report+0xcc/0x620 [ 64.086537] ? __virt_addr_valid+0x102/0x340 [ 64.087104] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.087742] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.088361] kasan_report+0xbe/0xf0 [ 64.088854] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.089479] vma_interval_tree_remove+0xc75/0xec0 [ 64.090096] vma_prepare+0xc54/0x11a0 [ 64.090582] __split_vma+0x5af/0x950 [ 64.091058] ? __pfx___split_vma+0x10/0x10 [ 64.091602] ? find_held_lock+0x2c/0x110 [ 64.092134] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.092708] ? lock_is_held_type+0x9f/0x120 [ 64.093276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.093902] ? mtree_range_walk+0x632/0x900 [ 64.094452] ? mas_walk+0x5c7/0x7c0 [ 64.094926] do_vmi_munmap+0x1f1/0x2b0 [ 64.095419] mmap_region+0x1f9/0x2660 [ 64.095908] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.096425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.097147] ? __pfx_lock_acquire+0x10/0x10 [ 64.097680] ? __pfx_mmap_region+0x10/0x10 [ 64.098230] ? security_mmap_addr+0x7d/0xa0 [ 64.098767] ? get_unmapped_area+0x1f5/0x3f0 [ 64.099325] do_mmap+0x854/0xf00 [ 64.099779] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.100288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.100869] ksys_mmap_pgoff+0x3af/0x500 [ 64.101375] do_syscall_64+0x3f/0x90 [ 64.101870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.102516] RIP: 0033:0x7f156625cd82 [ 64.102981] 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 [ 64.105130] RSP: 002b:00007ffe3ae0eb28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.106034] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f156625cd82 [ 64.106891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1565696000 [ 64.107742] RBP: 00007f1565696000 R08: 0000000000000009 R09: 0000000000001000 [ 64.108583] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e5f127d90 [ 64.109439] R13: 00007ffe3ae0eb40 R14: 00007ffe3ae0eb70 R15: 00007ffe3ae0eed0 [ 64.110302] [ 64.110608] [ 64.110835] Allocated by task 212: [ 64.111265] kasan_save_stack+0x22/0x50 [ 64.111784] kasan_set_track+0x25/0x30 [ 64.112289] __kasan_slab_alloc+0x59/0x70 [ 64.112851] kmem_cache_alloc+0x16b/0x370 [ 64.113374] vm_area_dup+0x20/0x160 [ 64.113843] __split_vma+0x170/0x950 [ 64.114310] split_vma+0xc6/0x110 [ 64.114767] mprotect_fixup+0x8d2/0xb30 [ 64.115284] do_mprotect_pkey+0x87e/0xd40 [ 64.115808] __x64_sys_mprotect+0x78/0xc0 [ 64.116348] do_syscall_64+0x3f/0x90 [ 64.116834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.117487] [ 64.117708] Freed by task 212: [ 64.118104] kasan_save_stack+0x22/0x50 [ 64.118621] kasan_set_track+0x25/0x30 [ 64.119121] kasan_save_free_info+0x2b/0x50 [ 64.119658] __kasan_slab_free+0x10a/0x190 [ 64.120198] kmem_cache_free+0x10d/0x4d0 [ 64.120727] rcu_core+0x8c8/0x2860 [ 64.121206] __do_softirq+0x1b7/0x7d4 [ 64.121704] [ 64.121925] Last potentially related work creation: [ 64.122520] kasan_save_stack+0x22/0x50 [ 64.123040] __kasan_record_aux_stack+0x8e/0xa0 [ 64.123630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.124299] remove_vma+0x139/0x170 [ 64.124756] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.125330] do_vmi_munmap+0x1f1/0x2b0 [ 64.125829] __vm_munmap+0x138/0x3a0 [ 64.126318] __x64_sys_munmap+0x59/0x80 [ 64.126831] do_syscall_64+0x3f/0x90 [ 64.127312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.127966] [ 64.128184] The buggy address belongs to the object at ffff88800e1c82b8 [ 64.128184] which belongs to the cache vm_area_struct of size 168 [ 64.129661] The buggy address is located 88 bytes inside of [ 64.129661] freed 168-byte region [ffff88800e1c82b8, ffff88800e1c8360) [ 64.131070] [ 64.131296] The buggy address belongs to the physical page: [ 64.131971] page:000000006bc4b2e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1c8 [ 64.133083] memcg:ffff88800cdd7201 [ 64.133521] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.134177] page_type: 0xffffffff() [ 64.134642] raw: 0100000000000200 ffff88800879fc80 ffffea000037eb40 dead000000000008 [ 64.135571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cdd7201 [ 64.136485] page dumped because: kasan: bad access detected [ 64.137163] [ 64.137381] Memory state around the buggy address: [ 64.137970] ffff88800e1c8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 64.138840] ffff88800e1c8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 64.139705] >ffff88800e1c8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 64.140561] ^ [ 64.141055] ffff88800e1c8380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.141921] ffff88800e1c8400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 64.142788] ================================================================== [ 64.143874] Disabling lock debugging due to kernel taint [ 66.131305] BUG: Bad rss-counter state mm:0000000049df1e51 type:MM_FILEPAGES val:33 [ 66.132298] BUG: Bad rss-counter state mm:0000000049df1e51 type:MM_ANONPAGES val:22 [ 66.603677] BUG: Bad rss-counter state mm:00000000cb2d5e91 type:MM_FILEPAGES val:33 [ 66.604694] BUG: Bad rss-counter state mm:00000000cb2d5e91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16429' (ECDSA) to the list of known hosts. 2023/06/19 20:08:49 fuzzer started 2023/06/19 20:08:49 dialing manager at localhost:44161 2023/06/19 20:08:49 checking machine... 2023/06/19 20:08:49 checking revisions... [ 67.399462] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:08:49 testing simple program... [ 67.439784] cgroup: Unknown subsys name 'net' [ 67.585560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:08:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000008 RSI=ffff88806ce09b30 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce099d0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b30 R15=ffff88806ce09a98 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007f1959837900 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=00007ffd07d1f000 CR3=000000000e6fe000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000092cc0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=0000000000092cc0 RBP=ffff888015bbf528 RSP=ffff888015bbf4d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000cc0 R15=ffffffff818470dc RIP=ffffffff8178792f RFL=00000282 [--S----] 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 00007f1959837900 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=00007f009b951350 CR3=000000000e6fe000 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