[ 25.291458] BUG: Bad rss-counter state mm:0000000065e68470 type:MM_FILEPAGES val:33 [ 25.292481] BUG: Bad rss-counter state mm:0000000065e68470 type:MM_ANONPAGES val:22 [ 25.465759] ================================================================== [ 25.466855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.467957] Read of size 8 at addr ffff88800f338228 by task sshd/219 [ 25.469024] [ 25.469282] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.470293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.471413] Call Trace: [ 25.471738] [ 25.472020] dump_stack_lvl+0x91/0xf0 [ 25.472508] print_report+0xcc/0x620 [ 25.472994] ? __virt_addr_valid+0x102/0x340 [ 25.473542] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.474153] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.474785] kasan_report+0xbe/0xf0 [ 25.475263] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.475884] vma_interval_tree_remove+0xc75/0xec0 [ 25.476494] vma_prepare+0xc54/0x11a0 [ 25.476972] __split_vma+0x5af/0x950 [ 25.477446] ? __pfx___split_vma+0x10/0x10 [ 25.477976] ? find_held_lock+0x2c/0x110 [ 25.478505] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.479070] ? lock_is_held_type+0x9f/0x120 [ 25.479608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.480216] ? mtree_range_walk+0x632/0x900 [ 25.480773] ? mas_walk+0x5c7/0x7c0 [ 25.481246] do_vmi_munmap+0x1f1/0x2b0 [ 25.481738] mmap_region+0x1f9/0x2660 [ 25.482222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.482750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.483458] ? __pfx_lock_acquire+0x10/0x10 [ 25.483993] ? __pfx_mmap_region+0x10/0x10 [ 25.484524] ? security_mmap_addr+0x7d/0xa0 [ 25.485056] ? get_unmapped_area+0x1f5/0x3f0 [ 25.485608] do_mmap+0x854/0xf00 [ 25.486047] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.486551] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.487121] ksys_mmap_pgoff+0x3af/0x500 [ 25.487627] do_syscall_64+0x3f/0x90 [ 25.488103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.488747] RIP: 0033:0x7fdb36062d82 [ 25.489204] 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 [ 25.491360] RSP: 002b:00007fffef8bd538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.492265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb36062d82 [ 25.493117] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb3549c000 [ 25.493969] RBP: 00007fdb3549c000 R08: 0000000000000009 R09: 0000000000001000 [ 25.494828] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618669b3ec0 [ 25.495676] R13: 00007fffef8bd550 R14: 00007fffef8bd580 R15: 00007fffef8bd8e0 [ 25.496540] [ 25.496835] [ 25.497049] Allocated by task 212: [ 25.497480] kasan_save_stack+0x22/0x50 [ 25.497984] kasan_set_track+0x25/0x30 [ 25.498489] __kasan_slab_alloc+0x59/0x70 [ 25.499016] kmem_cache_alloc+0x16b/0x370 [ 25.499540] vm_area_dup+0x20/0x160 [ 25.499999] __split_vma+0x170/0x950 [ 25.500461] split_vma+0xc6/0x110 [ 25.500898] mprotect_fixup+0x8d2/0xb30 [ 25.501404] do_mprotect_pkey+0x87e/0xd40 [ 25.501930] __x64_sys_mprotect+0x78/0xc0 [ 25.502454] do_syscall_64+0x3f/0x90 [ 25.502939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.503589] [ 25.503808] Freed by task 203: [ 25.504204] kasan_save_stack+0x22/0x50 [ 25.504714] kasan_set_track+0x25/0x30 [ 25.505216] kasan_save_free_info+0x2b/0x50 [ 25.505752] __kasan_slab_free+0x10a/0x190 [ 25.506285] kmem_cache_free+0x10d/0x4d0 [ 25.506817] rcu_core+0x8c8/0x2860 [ 25.507265] __do_softirq+0x1b7/0x7d4 [ 25.507740] [ 25.507964] Last potentially related work creation: [ 25.508560] kasan_save_stack+0x22/0x50 [ 25.509068] __kasan_record_aux_stack+0x8e/0xa0 [ 25.509648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.510371] remove_vma+0x139/0x170 [ 25.510828] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.511394] do_vmi_munmap+0x1f1/0x2b0 [ 25.511877] __vm_munmap+0x138/0x3a0 [ 25.512351] __x64_sys_munmap+0x59/0x80 [ 25.512855] do_syscall_64+0x3f/0x90 [ 25.513333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.513975] [ 25.514190] The buggy address belongs to the object at ffff88800f3381d0 [ 25.514190] which belongs to the cache vm_area_struct of size 168 [ 25.515680] The buggy address is located 88 bytes inside of [ 25.515680] freed 168-byte region [ffff88800f3381d0, ffff88800f338278) [ 25.517089] [ 25.517305] The buggy address belongs to the physical page: [ 25.517980] page:00000000b5ce4b97 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf338 [ 25.519110] memcg:ffff88800c963601 [ 25.519545] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.520191] page_type: 0xffffffff() [ 25.520639] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.521555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c963601 [ 25.522490] page dumped because: kasan: bad access detected [ 25.523157] [ 25.523373] Memory state around the buggy address: [ 25.523966] ffff88800f338100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.524819] ffff88800f338180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 25.525681] >ffff88800f338200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 25.526560] ^ [ 25.527117] ffff88800f338280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.527974] ffff88800f338300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.528831] ================================================================== [ 25.529781] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.274268] BUG: Bad rss-counter state mm:00000000d27d2a6f type:MM_FILEPAGES val:33 [ 27.274952] BUG: Bad rss-counter state mm:00000000d27d2a6f type:MM_ANONPAGES val:22 [ 27.824198] BUG: Bad rss-counter state mm:0000000095ba78dc type:MM_FILEPAGES val:33 [ 27.825200] BUG: Bad rss-counter state mm:0000000095ba78dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16221' (ECDSA) to the list of known hosts. 2023/06/19 20:01:15 fuzzer started 2023/06/19 20:01:16 dialing manager at localhost:44161 2023/06/19 20:01:16 checking machine... 2023/06/19 20:01:16 checking revisions... [ 28.484980] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:01:16 testing simple program... [ 28.528257] cgroup: Unknown subsys name 'net' [ 28.582199] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:14 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b15f4 RDX=0000000000000000 RSI=ffff8880147d7529 RDI=0000000000000001 RBP=ffff8880147d7540 RSP=ffff8880147d7478 R8 =ffffffff863b15f8 R9 =ffff8880147d7528 R10=0000000000038001 R11=000000000008a85c R12=ffff8880147d7548 R13=ffff8880147d7530 R14=ffff8880147d7529 R15=ffff8880147d74e8 RIP=ffffffff81130ae3 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 00007fce80a84900 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=00007fce7fe73700 CR3=000000000cc04000 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=fa0599d68932caaf01413e556d52a550 XMM02=ec2efd57dc4c00df000000000011d910 XMM03=ea112d3266df59cf000000000011d9e0 XMM04=d322d35105dca8ca00000000000ae988 XMM05=eecfec9f312ddabc0000000000134c38 XMM06=806171799158d96700000000001333e8 XMM07=fb795ef6d65770560000000000123c30 XMM08=2c67c8bc2e329bc3000000000011d980 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab3fa9 RDI=ffff88800fc855b4 RBP=ffff88800fc851c0 RSP=ffff8880166174f0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000009 R11=0000090300000903 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff8135bd46 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 00007f32b13a6900 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=00007ffd07c3e000 CR3=00000000094fc000 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