[ 23.897881] BUG: Bad rss-counter state mm:00000000cbb2b770 type:MM_FILEPAGES val:33 [ 23.899382] BUG: Bad rss-counter state mm:00000000cbb2b770 type:MM_ANONPAGES val:22 [ 24.068568] ================================================================== [ 24.069502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.070454] Read of size 8 at addr ffff88800ffbddf0 by task sshd/219 [ 24.071304] [ 24.071562] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.072423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.073397] Call Trace: [ 24.073751] [ 24.074039] dump_stack_lvl+0x91/0xf0 [ 24.074537] print_report+0xcc/0x620 [ 24.075043] ? __virt_addr_valid+0x102/0x340 [ 24.075595] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.076219] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.076832] kasan_report+0xbe/0xf0 [ 24.077307] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.077925] vma_interval_tree_remove+0xc75/0xec0 [ 24.078537] vma_prepare+0xc54/0x11a0 [ 24.079025] __split_vma+0x5af/0x950 [ 24.079495] ? __pfx___split_vma+0x10/0x10 [ 24.080020] ? find_held_lock+0x2c/0x110 [ 24.080537] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.081116] ? lock_is_held_type+0x9f/0x120 [ 24.081660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.082259] ? mtree_range_walk+0x632/0x900 [ 24.082811] ? mas_walk+0x5c7/0x7c0 [ 24.083295] do_vmi_munmap+0x1f1/0x2b0 [ 24.083788] mmap_region+0x1f9/0x2660 [ 24.084280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.084798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.085530] ? __pfx_lock_acquire+0x10/0x10 [ 24.086058] ? __pfx_mmap_region+0x10/0x10 [ 24.086588] ? security_mmap_addr+0x7d/0xa0 [ 24.087147] ? get_unmapped_area+0x1f5/0x3f0 [ 24.087704] do_mmap+0x854/0xf00 [ 24.088142] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.088646] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.089209] ksys_mmap_pgoff+0x3af/0x500 [ 24.089721] do_syscall_64+0x3f/0x90 [ 24.090220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.090871] RIP: 0033:0x7fe40ea8dd82 [ 24.091333] 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 [ 24.093469] RSP: 002b:00007ffe3d092268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.094379] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe40ea8dd82 [ 24.095250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe40dec7000 [ 24.096098] RBP: 00007fe40dec7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.096949] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587ec45bec0 [ 24.097799] R13: 00007ffe3d092280 R14: 00007ffe3d0922b0 R15: 00007ffe3d092610 [ 24.098664] [ 24.098962] [ 24.099182] Allocated by task 212: [ 24.099611] kasan_save_stack+0x22/0x50 [ 24.100118] kasan_set_track+0x25/0x30 [ 24.100621] __kasan_slab_alloc+0x59/0x70 [ 24.101149] kmem_cache_alloc+0x16b/0x370 [ 24.101664] vm_area_dup+0x20/0x160 [ 24.102126] __split_vma+0x170/0x950 [ 24.102592] split_vma+0xc6/0x110 [ 24.103052] mprotect_fixup+0x8d2/0xb30 [ 24.103555] do_mprotect_pkey+0x87e/0xd40 [ 24.104089] __x64_sys_mprotect+0x78/0xc0 [ 24.104622] do_syscall_64+0x3f/0x90 [ 24.105093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.105737] [ 24.105948] Freed by task 13: [ 24.106329] kasan_save_stack+0x22/0x50 [ 24.106838] kasan_set_track+0x25/0x30 [ 24.107346] kasan_save_free_info+0x2b/0x50 [ 24.107878] __kasan_slab_free+0x10a/0x190 [ 24.108421] kmem_cache_free+0x10d/0x4d0 [ 24.108933] rcu_core+0x8c8/0x2860 [ 24.109376] __do_softirq+0x1b7/0x7d4 [ 24.109850] [ 24.110072] Last potentially related work creation: [ 24.110662] kasan_save_stack+0x22/0x50 [ 24.111188] __kasan_record_aux_stack+0x8e/0xa0 [ 24.111759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.112424] remove_vma+0x139/0x170 [ 24.112877] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.113435] do_vmi_munmap+0x1f1/0x2b0 [ 24.113919] __vm_munmap+0x138/0x3a0 [ 24.114381] __x64_sys_munmap+0x59/0x80 [ 24.114876] do_syscall_64+0x3f/0x90 [ 24.115366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.116014] [ 24.116232] Second to last potentially related work creation: [ 24.116916] kasan_save_stack+0x22/0x50 [ 24.117420] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.118628] remove_vma+0x139/0x170 [ 24.119099] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.119674] do_vmi_munmap+0x1f1/0x2b0 [ 24.120168] __vm_munmap+0x138/0x3a0 [ 24.120640] __x64_sys_munmap+0x59/0x80 [ 24.121136] do_syscall_64+0x3f/0x90 [ 24.121615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.122262] [ 24.122481] The buggy address belongs to the object at ffff88800ffbdd98 [ 24.122481] which belongs to the cache vm_area_struct of size 168 [ 24.123974] The buggy address is located 88 bytes inside of [ 24.123974] freed 168-byte region [ffff88800ffbdd98, ffff88800ffbde40) [ 24.125403] [ 24.125623] The buggy address belongs to the physical page: [ 24.126283] page:00000000981fcc28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffbd [ 24.127392] memcg:ffff88800d7e7101 [ 24.127819] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.128529] page_type: 0xffffffff() [ 24.128988] raw: 0100000000000200 ffff8880087a0c80 ffffea00003be700 dead000000000005 [ 24.129897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7e7101 [ 24.130809] page dumped because: kasan: bad access detected [ 24.131484] [ 24.131708] Memory state around the buggy address: [ 24.132291] ffff88800ffbdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.133148] ffff88800ffbdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.134008] >ffff88800ffbdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.134862] ^ [ 24.135692] ffff88800ffbde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.136559] ffff88800ffbde80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.137432] ================================================================== [ 24.138502] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.293063] BUG: Bad rss-counter state mm:00000000517a2db9 type:MM_FILEPAGES val:33 [ 26.294112] BUG: Bad rss-counter state mm:00000000517a2db9 type:MM_ANONPAGES val:22 [ 26.730823] BUG: Bad rss-counter state mm:00000000d02afabc type:MM_FILEPAGES val:33 [ 26.731815] BUG: Bad rss-counter state mm:00000000d02afabc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39543' (ECDSA) to the list of known hosts. 2023/06/20 13:42:08 fuzzer started 2023/06/20 13:42:08 dialing manager at localhost:36067 2023/06/20 13:42:08 checking machine... 2023/06/20 13:42:08 checking revisions... [ 27.424248] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:42:09 testing simple program... [ 27.468940] cgroup: Unknown subsys name 'net' [ 27.500324] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:42:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff854eea70 RCX=0000000000000000 RDX=ffff88801478b680 RSI=ffffffff81482170 RDI=ffffffff854eea70 RBP=1ffff11002060ed6 RSP=ffff888010307608 R8 =0000000000000004 R9 =0000000000000066 R10=00000000fffffffe R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000001 R14=ffffffff854eea70 R15=ffffffff854ee9e0 RIP=ffffffff8148218e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0632ec9900 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=00007f06322b9670 CR3=000000000cb80000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ea60b94ac8b2a81e00000000000ae988 XMM05=354c8fd4ac951f5b0000000000133468 XMM06=d78a9a464d8c7a480000000000131e98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff0929ea28 CR3=00000000182d2000 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=2038303a32343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a32343a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000