[ 42.389631] BUG: Bad rss-counter state mm:000000008f74fc52 type:MM_FILEPAGES val:33 [ 42.390664] BUG: Bad rss-counter state mm:000000008f74fc52 type:MM_ANONPAGES val:22 [ 42.493906] ================================================================== [ 42.494625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.495371] Read of size 8 at addr ffff88800df24df0 by task sshd/220 [ 42.495959] [ 42.496126] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.496785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.497539] Call Trace: [ 42.497780] [ 42.498003] dump_stack_lvl+0x91/0xf0 [ 42.498491] print_report+0xcc/0x620 [ 42.498907] ? __virt_addr_valid+0x102/0x340 [ 42.499339] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.499819] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.500303] kasan_report+0xbe/0xf0 [ 42.500671] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.501159] vma_interval_tree_remove+0xc75/0xec0 [ 42.501622] vma_prepare+0xc54/0x11a0 [ 42.501996] __split_vma+0x5af/0x950 [ 42.502370] ? __pfx___split_vma+0x10/0x10 [ 42.502783] ? find_held_lock+0x2c/0x110 [ 42.503196] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.503634] ? lock_is_held_type+0x9f/0x120 [ 42.504051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.504522] ? mtree_range_walk+0x632/0x900 [ 42.504949] ? mas_walk+0x5c7/0x7c0 [ 42.505316] do_vmi_munmap+0x1f1/0x2b0 [ 42.505703] mmap_region+0x1f9/0x2660 [ 42.506079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.506472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.507045] ? __pfx_lock_acquire+0x10/0x10 [ 42.507457] ? __pfx_mmap_region+0x10/0x10 [ 42.507867] ? security_mmap_addr+0x7d/0xa0 [ 42.508200] ? get_unmapped_area+0x1f5/0x3f0 [ 42.508508] do_mmap+0x854/0xf00 [ 42.508755] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.509034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.509350] ksys_mmap_pgoff+0x3af/0x500 [ 42.509638] do_syscall_64+0x3f/0x90 [ 42.509911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.510280] RIP: 0033:0x7fa86af5dd82 [ 42.510540] 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 [ 42.511755] RSP: 002b:00007ffd31c28028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.512258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa86af5dd82 [ 42.512726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa86a397000 [ 42.513200] RBP: 00007fa86a397000 R08: 0000000000000009 R09: 0000000000001000 [ 42.513674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecb28acb20 [ 42.514145] R13: 00007ffd31c28040 R14: 00007ffd31c28070 R15: 00007ffd31c283d0 [ 42.514626] [ 42.514793] [ 42.514912] Allocated by task 213: [ 42.515167] kasan_save_stack+0x22/0x50 [ 42.515451] kasan_set_track+0x25/0x30 [ 42.515727] __kasan_slab_alloc+0x59/0x70 [ 42.516016] kmem_cache_alloc+0x16b/0x370 [ 42.516307] vm_area_dup+0x20/0x160 [ 42.516559] __split_vma+0x170/0x950 [ 42.516822] split_vma+0xc6/0x110 [ 42.517078] mprotect_fixup+0x8d2/0xb30 [ 42.517355] do_mprotect_pkey+0x87e/0xd40 [ 42.517649] __x64_sys_mprotect+0x78/0xc0 [ 42.517939] do_syscall_64+0x3f/0x90 [ 42.518201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.518555] [ 42.518675] Freed by task 211: [ 42.518897] kasan_save_stack+0x22/0x50 [ 42.519190] kasan_set_track+0x25/0x30 [ 42.519465] kasan_save_free_info+0x2b/0x50 [ 42.519758] __kasan_slab_free+0x10a/0x190 [ 42.520070] kmem_cache_free+0x10d/0x4d0 [ 42.520354] rcu_core+0x8c8/0x2860 [ 42.520603] __do_softirq+0x1b7/0x7d4 [ 42.520866] [ 42.520985] Last potentially related work creation: [ 42.521313] kasan_save_stack+0x22/0x50 [ 42.521593] __kasan_record_aux_stack+0x8e/0xa0 [ 42.521915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.522270] remove_vma+0x139/0x170 [ 42.522520] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.522832] do_vmi_munmap+0x1f1/0x2b0 [ 42.523115] __vm_munmap+0x138/0x3a0 [ 42.523375] __x64_sys_munmap+0x59/0x80 [ 42.523658] do_syscall_64+0x3f/0x90 [ 42.523928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.524290] [ 42.524410] The buggy address belongs to the object at ffff88800df24d98 [ 42.524410] which belongs to the cache vm_area_struct of size 168 [ 42.525229] The buggy address is located 88 bytes inside of [ 42.525229] freed 168-byte region [ffff88800df24d98, ffff88800df24e40) [ 42.526006] [ 42.526124] The buggy address belongs to the physical page: [ 42.526491] page:00000000070be4a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf24 [ 42.527116] memcg:ffff88800e9bec01 [ 42.527351] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.527709] page_type: 0xffffffff() [ 42.527957] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 42.528500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9bec01 [ 42.529048] page dumped because: kasan: bad access detected [ 42.529446] [ 42.529568] Memory state around the buggy address: [ 42.529915] ffff88800df24c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.530408] ffff88800df24d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.530917] >ffff88800df24d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.531443] ^ [ 42.531918] ffff88800df24e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.532435] ffff88800df24e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.532897] ================================================================== [ 42.533393] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.512779] BUG: Bad rss-counter state mm:00000000a077d126 type:MM_FILEPAGES val:33 [ 44.514213] BUG: Bad rss-counter state mm:00000000a077d126 type:MM_ANONPAGES val:22 [ 44.984413] BUG: Bad rss-counter state mm:00000000e2c8aa5a type:MM_FILEPAGES val:33 [ 44.985394] BUG: Bad rss-counter state mm:00000000e2c8aa5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35178' (ECDSA) to the list of known hosts. 2023/06/19 16:41:50 fuzzer started 2023/06/19 16:41:50 dialing manager at localhost:44161 2023/06/19 16:41:50 checking machine... 2023/06/19 16:41:50 checking revisions... [ 45.716394] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:41:50 testing simple program... [ 45.770569] cgroup: Unknown subsys name 'net' [ 45.822378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:41:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8451dbc4 RDX=ffffed1002b03f20 RSI=0000000000000008 RDI=ffff88801581f8f8 RBP=ffff88801027b680 RSP=ffff88801581f868 R8 =0000000000000001 R9 =ffffed1002b03f1f R10=ffff88801581f8ff R11=0000000000000000 R12=ffff88801027b680 R13=ffff88801027b680 R14=ffff8880168f0510 R15=dffffc0000000000 RIP=ffffffff8451dbd5 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 00007f62685bb900 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=00007f1bb516e650 CR3=000000000c7a8000 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=3aa342536bfa5396b34d8d98c6347555 XMM02=000000000011f1b8eff9b2d0a8fce9cb XMM03=000000000011f2882c67c8bc2e329bc3 XMM04=5ba4f10285c01ae000000000000ae988 XMM05=c2d7fb8d726df3480000000000133b80 XMM06=4fda316b135da52b0000000000132600 XMM07=fb795ef6d65770560000000000122ed0 XMM08=2c67c8bc2e329bc3000000000011f228 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=ffff888008c58400 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=00007ffe8deef498 CR3=000000000b806000 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=2039343a31343a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000