[ 36.256216] BUG: Bad rss-counter state mm:000000004d95f20b type:MM_FILEPAGES val:33 [ 36.257501] BUG: Bad rss-counter state mm:000000004d95f20b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.433259] ================================================================== [ 36.434229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.435319] Read of size 8 at addr ffff888016e7e310 by task sshd/219 [ 36.436133] [ 36.436366] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.437315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.438357] Call Trace: [ 36.438727] [ 36.439028] dump_stack_lvl+0x91/0xf0 [ 36.439548] print_report+0xcc/0x620 [ 36.440071] ? __virt_addr_valid+0x102/0x340 [ 36.440685] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.441360] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.442043] kasan_report+0xbe/0xf0 [ 36.442583] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.443270] vma_interval_tree_remove+0xc75/0xec0 [ 36.443941] vma_prepare+0xc54/0x11a0 [ 36.444475] __split_vma+0x5af/0x950 [ 36.444993] ? __pfx___split_vma+0x10/0x10 [ 36.445580] ? find_held_lock+0x2c/0x110 [ 36.446162] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.446792] ? lock_is_held_type+0x9f/0x120 [ 36.447387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.448064] ? mtree_range_walk+0x632/0x900 [ 36.448672] ? mas_walk+0x5c7/0x7c0 [ 36.449195] do_vmi_munmap+0x1f1/0x2b0 [ 36.449741] mmap_region+0x1f9/0x2660 [ 36.450274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.450865] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.451658] ? __pfx_lock_acquire+0x10/0x10 [ 36.452246] ? __pfx_mmap_region+0x10/0x10 [ 36.452834] ? security_mmap_addr+0x7d/0xa0 [ 36.453434] ? get_unmapped_area+0x1f5/0x3f0 [ 36.454043] do_mmap+0x854/0xf00 [ 36.454536] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.455089] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.455718] ksys_mmap_pgoff+0x3af/0x500 [ 36.456283] do_syscall_64+0x3f/0x90 [ 36.456814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.457539] RIP: 0033:0x7f5d62ea7d82 [ 36.458047] 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 [ 36.460425] RSP: 002b:00007ffd6a1547a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.461426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d62ea7d82 [ 36.462361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d622e1000 [ 36.463317] RBP: 00007f5d622e1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.464254] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c93cdff70 [ 36.465198] R13: 00007ffd6a1547c0 R14: 00007ffd6a1547f0 R15: 00007ffd6a154b50 [ 36.466149] [ 36.466482] [ 36.466724] Allocated by task 212: [ 36.467200] kasan_save_stack+0x22/0x50 [ 36.467763] kasan_set_track+0x25/0x30 [ 36.468311] __kasan_slab_alloc+0x59/0x70 [ 36.468893] kmem_cache_alloc+0x16b/0x370 [ 36.469465] vm_area_dup+0x20/0x160 [ 36.469968] __split_vma+0x170/0x950 [ 36.470502] split_vma+0xc6/0x110 [ 36.470991] mprotect_fixup+0x8d2/0xb30 [ 36.471548] do_mprotect_pkey+0x87e/0xd40 [ 36.472126] __x64_sys_mprotect+0x78/0xc0 [ 36.472700] do_syscall_64+0x3f/0x90 [ 36.473225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.473937] [ 36.474177] Freed by task 212: [ 36.474628] kasan_save_stack+0x22/0x50 [ 36.475189] kasan_set_track+0x25/0x30 [ 36.475736] kasan_save_free_info+0x2b/0x50 [ 36.476322] __kasan_slab_free+0x10a/0x190 [ 36.476914] kmem_cache_free+0x10d/0x4d0 [ 36.477472] rcu_core+0x8c8/0x2860 [ 36.477963] __do_softirq+0x1b7/0x7d4 [ 36.478506] [ 36.478744] Last potentially related work creation: [ 36.479405] kasan_save_stack+0x22/0x50 [ 36.479964] __kasan_record_aux_stack+0x8e/0xa0 [ 36.480595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.481314] remove_vma+0x139/0x170 [ 36.481823] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.482447] do_vmi_munmap+0x1f1/0x2b0 [ 36.482988] __vm_munmap+0x138/0x3a0 [ 36.483512] __x64_sys_munmap+0x59/0x80 [ 36.484062] do_syscall_64+0x3f/0x90 [ 36.484582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.485282] [ 36.485526] The buggy address belongs to the object at ffff888016e7e2b8 [ 36.485526] which belongs to the cache vm_area_struct of size 168 [ 36.487199] The buggy address is located 88 bytes inside of [ 36.487199] freed 168-byte region [ffff888016e7e2b8, ffff888016e7e360) [ 36.488782] [ 36.489026] The buggy address belongs to the physical page: [ 36.489756] page:00000000e91548ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e7e [ 36.490994] memcg:ffff88800f24cf01 [ 36.491466] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.492191] page_type: 0xffffffff() [ 36.492696] raw: 0100000000000200 ffff88800879fc80 ffffea00003f2dc0 0000000000000004 [ 36.493716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f24cf01 [ 36.494756] page dumped because: kasan: bad access detected [ 36.495496] [ 36.495739] Memory state around the buggy address: [ 36.496381] ffff888016e7e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.497328] ffff888016e7e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.498294] >ffff888016e7e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.499259] ^ [ 36.499778] ffff888016e7e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.500729] ffff888016e7e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.501679] ================================================================== [ 36.502842] Disabling lock debugging due to kernel taint [ 38.533247] BUG: Bad rss-counter state mm:000000003be10ad1 type:MM_FILEPAGES val:33 [ 38.534420] BUG: Bad rss-counter state mm:000000003be10ad1 type:MM_ANONPAGES val:22 [ 38.921530] BUG: Bad rss-counter state mm:00000000822528a0 type:MM_FILEPAGES val:33 [ 38.922536] BUG: Bad rss-counter state mm:00000000822528a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42237' (ECDSA) to the list of known hosts. 2023/06/19 22:52:47 fuzzer started 2023/06/19 22:52:47 dialing manager at localhost:44161 2023/06/19 22:52:47 checking machine... 2023/06/19 22:52:47 checking revisions... [ 39.686597] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:52:47 testing simple program... [ 39.741347] cgroup: Unknown subsys name 'net' [ 39.786839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:52:34 Registers: info registers vcpu 0 RAX=ffffffff813ad6f7 RBX=ffffffff85dbc1f8 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88800fec7490 R8 =ffffffff860d68c0 R9 =ffff88800fec7588 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc99 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 00007f9c627a4900 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=00007f70ecd24650 CR3=000000000f21c000 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=6f36a39a586440b940447167ac52de07 XMM02=eff9b2d0a8fce9cb000000000011c7e8 XMM03=2c67c8bc2e329bc3000000000011c910 XMM04=14ee6b1d3174ff1200000000000ae988 XMM05=8e6461ea772a9e760000000000134728 XMM06=dfcdbad4f1609c370000000000133250 XMM07=fb795ef6d65770560000000000123760 XMM08=2c67c8bc2e329bc3000000000011c910 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe56afb2f8 CR3=000000000f19a000 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=2037343a32353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000