[ 26.412380] BUG: Bad rss-counter state mm:00000000a353634b type:MM_FILEPAGES val:33 [ 26.413578] BUG: Bad rss-counter state mm:00000000a353634b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.446967] ================================================================== [ 26.447745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.448520] Read of size 8 at addr ffff888013e9a5c8 by task sshd/219 [ 26.449143] [ 26.449302] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.449978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.450665] Call Trace: [ 26.450893] [ 26.451099] dump_stack_lvl+0x91/0xf0 [ 26.451448] print_report+0xcc/0x620 [ 26.451798] ? __virt_addr_valid+0x102/0x340 [ 26.452189] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.452626] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.453061] kasan_report+0xbe/0xf0 [ 26.453396] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.453836] vma_interval_tree_remove+0xc75/0xec0 [ 26.454259] vma_prepare+0xc54/0x11a0 [ 26.454599] __split_vma+0x5af/0x950 [ 26.454932] ? __pfx___split_vma+0x10/0x10 [ 26.455306] ? find_held_lock+0x2c/0x110 [ 26.455673] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.456096] ? lock_is_held_type+0x9f/0x120 [ 26.456477] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.456906] ? mtree_range_walk+0x632/0x900 [ 26.457298] ? mas_walk+0x5c7/0x7c0 [ 26.457631] do_vmi_munmap+0x1f1/0x2b0 [ 26.457980] mmap_region+0x1f9/0x2660 [ 26.458322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.458684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.459188] ? __pfx_lock_acquire+0x10/0x10 [ 26.459564] ? __pfx_mmap_region+0x10/0x10 [ 26.459941] ? security_mmap_addr+0x7d/0xa0 [ 26.460319] ? get_unmapped_area+0x1f5/0x3f0 [ 26.460711] do_mmap+0x854/0xf00 [ 26.461027] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.461377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.461776] ksys_mmap_pgoff+0x3af/0x500 [ 26.462135] do_syscall_64+0x3f/0x90 [ 26.462473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.462930] RIP: 0033:0x7f6a46607d82 [ 26.463254] 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 [ 26.464758] RSP: 002b:00007ffced29e6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.465393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a46607d82 [ 26.465988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a45a41000 [ 26.466584] RBP: 00007f6a45a41000 R08: 0000000000000009 R09: 0000000000001000 [ 26.467175] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ac57b4b20 [ 26.467790] R13: 00007ffced29e710 R14: 00007ffced29e740 R15: 00007ffced29eaa0 [ 26.468392] [ 26.468599] [ 26.468753] Allocated by task 212: [ 26.469057] kasan_save_stack+0x22/0x50 [ 26.469416] kasan_set_track+0x25/0x30 [ 26.469764] __kasan_slab_alloc+0x59/0x70 [ 26.470133] kmem_cache_alloc+0x16b/0x370 [ 26.470499] vm_area_dup+0x20/0x160 [ 26.470818] __split_vma+0x170/0x950 [ 26.471148] split_vma+0xc6/0x110 [ 26.471460] mprotect_fixup+0x8d2/0xb30 [ 26.471821] do_mprotect_pkey+0x87e/0xd40 [ 26.472192] __x64_sys_mprotect+0x78/0xc0 [ 26.472559] do_syscall_64+0x3f/0x90 [ 26.472891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.473343] [ 26.473496] Freed by task 203: [ 26.473772] kasan_save_stack+0x22/0x50 [ 26.474129] kasan_set_track+0x25/0x30 [ 26.474478] kasan_save_free_info+0x2b/0x50 [ 26.474854] __kasan_slab_free+0x10a/0x190 [ 26.475230] kmem_cache_free+0x10d/0x4d0 [ 26.475590] rcu_core+0x8c8/0x2860 [ 26.475913] __do_softirq+0x1b7/0x7d4 [ 26.476251] [ 26.476511] Last potentially related work creation: [ 26.476996] kasan_save_stack+0x22/0x50 [ 26.477353] __kasan_record_aux_stack+0x8e/0xa0 [ 26.477761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.478216] remove_vma+0x139/0x170 [ 26.478536] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.478943] do_vmi_munmap+0x1f1/0x2b0 [ 26.479286] __vm_munmap+0x138/0x3a0 [ 26.479616] __x64_sys_munmap+0x59/0x80 [ 26.479974] do_syscall_64+0x3f/0x90 [ 26.480309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.480764] [ 26.480919] Second to last potentially related work creation: [ 26.481400] kasan_save_stack+0x22/0x50 [ 26.481759] __kasan_record_aux_stack+0x8e/0xa0 [ 26.482163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.482620] remove_vma+0x139/0x170 [ 26.482936] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.483330] do_vmi_munmap+0x1f1/0x2b0 [ 26.483680] mmap_region+0x1f9/0x2660 [ 26.484023] do_mmap+0x854/0xf00 [ 26.484329] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.484676] ksys_mmap_pgoff+0x3af/0x500 [ 26.485031] do_syscall_64+0x3f/0x90 [ 26.485365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.485817] [ 26.485970] The buggy address belongs to the object at ffff888013e9a570 [ 26.485970] which belongs to the cache vm_area_struct of size 168 [ 26.487002] The buggy address is located 88 bytes inside of [ 26.487002] freed 168-byte region [ffff888013e9a570, ffff888013e9a618) [ 26.488008] [ 26.488163] The buggy address belongs to the physical page: [ 26.488626] page:000000005df12e7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13e9a [ 26.489392] memcg:ffff88800e9afe01 [ 26.489694] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.490190] page_type: 0xffffffff() [ 26.490511] raw: 0100000000000200 ffff88800879fc80 ffffea00003bb800 dead000000000003 [ 26.491154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9afe01 [ 26.491794] page dumped because: kasan: bad access detected [ 26.492255] [ 26.492410] Memory state around the buggy address: [ 26.492817] ffff888013e9a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.493419] ffff888013e9a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 26.494015] >ffff888013e9a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.494615] ^ [ 26.495083] ffff888013e9a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 26.495682] ffff888013e9a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.496288] ================================================================== [ 26.497011] Disabling lock debugging due to kernel taint [ 28.352356] BUG: Bad rss-counter state mm:00000000428504bc type:MM_FILEPAGES val:33 [ 28.353305] BUG: Bad rss-counter state mm:00000000428504bc type:MM_ANONPAGES val:22 [ 28.849123] BUG: Bad rss-counter state mm:00000000bed4af97 type:MM_FILEPAGES val:33 [ 28.850391] BUG: Bad rss-counter state mm:00000000bed4af97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39679' (ECDSA) to the list of known hosts. 2023/06/19 13:34:39 fuzzer started 2023/06/19 13:34:39 dialing manager at localhost:44161 2023/06/19 13:34:39 checking machine... 2023/06/19 13:34:39 checking revisions... [ 29.550160] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:34:39 testing simple program... [ 29.597206] cgroup: Unknown subsys name 'net' [ 29.701439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000028014226 RCX=ffffffff818dd9ac RDX=ffff8880164d51c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801583f7f0 RSP=ffff88801583f750 R8 =0000000000000006 R9 =7fffffffffffffff R10=000000006490596e R11=0000000000000001 R12=000000006490596e R13=ffff888014694000 R14=0000000000000001 R15=7fffffffffffffff RIP=ffffffff814c07eb RFL=00000202 [-------] 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 00007f2102880900 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=00007f2101c723f0 CR3=000000000d782000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=01ae6a44a14fbf2a00000000000ae988 XMM05=2b00a38f2527f4460000000000136368 XMM06=806171799158d9670000000000134de8 XMM07=fb795ef6d65770560000000000124000 XMM08=4f5453444600273d67736d000d0a0920 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=00007fd369fdb650 CR3=000000000f252000 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=2038333a34333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a34333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000