[ 47.424127] BUG: Bad rss-counter state mm:000000007189ee52 type:MM_FILEPAGES val:33 [ 47.424944] BUG: Bad rss-counter state mm:000000007189ee52 type:MM_ANONPAGES val:22 [ 47.456266] ================================================================== [ 47.456981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.457642] Read of size 8 at addr ffff88800daf8d08 by task sshd/225 [ 47.458144] [ 47.458290] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.458882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.459561] Call Trace: [ 47.459787] [ 47.459994] dump_stack_lvl+0x91/0xf0 [ 47.460342] print_report+0xcc/0x620 [ 47.460733] ? __virt_addr_valid+0x102/0x340 [ 47.461131] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.461567] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.461992] kasan_report+0xbe/0xf0 [ 47.462332] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.462777] vma_interval_tree_remove+0xc75/0xec0 [ 47.463225] vma_prepare+0xc54/0x11a0 [ 47.463567] __split_vma+0x5af/0x950 [ 47.463898] ? __pfx___split_vma+0x10/0x10 [ 47.464273] ? find_held_lock+0x2c/0x110 [ 47.464692] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.465094] ? lock_is_held_type+0x9f/0x120 [ 47.465473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.465904] ? mtree_range_walk+0x632/0x900 [ 47.466294] ? mas_walk+0x5c7/0x7c0 [ 47.466644] do_vmi_munmap+0x1f1/0x2b0 [ 47.466998] mmap_region+0x1f9/0x2660 [ 47.467330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.467706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.468196] ? __pfx_lock_acquire+0x10/0x10 [ 47.468597] ? __pfx_mmap_region+0x10/0x10 [ 47.468979] ? security_mmap_addr+0x7d/0xa0 [ 47.469345] ? get_unmapped_area+0x1f5/0x3f0 [ 47.469739] do_mmap+0x854/0xf00 [ 47.470044] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.470395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.470793] ksys_mmap_pgoff+0x3af/0x500 [ 47.471155] do_syscall_64+0x3f/0x90 [ 47.471492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.471928] RIP: 0033:0x7faa63de5d82 [ 47.472235] 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 [ 47.473784] RSP: 002b:00007fff98f5f7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.474435] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa63de5d82 [ 47.475040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa6321f000 [ 47.475650] RBP: 00007faa6321f000 R08: 0000000000000009 R09: 0000000000001000 [ 47.476239] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d1181df70 [ 47.476843] R13: 00007fff98f5f7d0 R14: 00007fff98f5f800 R15: 00007fff98f5fb60 [ 47.477423] [ 47.477629] [ 47.477781] Allocated by task 218: [ 47.478084] kasan_save_stack+0x22/0x50 [ 47.478457] kasan_set_track+0x25/0x30 [ 47.478795] __kasan_slab_alloc+0x59/0x70 [ 47.479141] kmem_cache_alloc+0x16b/0x370 [ 47.479491] vm_area_dup+0x20/0x160 [ 47.479797] __split_vma+0x170/0x950 [ 47.480116] split_vma+0xc6/0x110 [ 47.480433] mprotect_fixup+0x8d2/0xb30 [ 47.480781] do_mprotect_pkey+0x87e/0xd40 [ 47.481149] __x64_sys_mprotect+0x78/0xc0 [ 47.481515] do_syscall_64+0x3f/0x90 [ 47.481852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.482301] [ 47.482453] Freed by task 204: [ 47.482738] kasan_save_stack+0x22/0x50 [ 47.483096] kasan_set_track+0x25/0x30 [ 47.483445] kasan_save_free_info+0x2b/0x50 [ 47.483826] __kasan_slab_free+0x10a/0x190 [ 47.484200] kmem_cache_free+0x10d/0x4d0 [ 47.484604] rcu_core+0x8c8/0x2860 [ 47.484969] __do_softirq+0x1b7/0x7d4 [ 47.485323] [ 47.485477] Last potentially related work creation: [ 47.485898] kasan_save_stack+0x22/0x50 [ 47.486256] __kasan_record_aux_stack+0x8e/0xa0 [ 47.486676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.487155] remove_vma+0x139/0x170 [ 47.487460] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.487842] do_vmi_munmap+0x1f1/0x2b0 [ 47.488189] __vm_munmap+0x138/0x3a0 [ 47.488547] __x64_sys_munmap+0x59/0x80 [ 47.488924] do_syscall_64+0x3f/0x90 [ 47.489256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.489704] [ 47.489854] The buggy address belongs to the object at ffff88800daf8cb0 [ 47.489854] which belongs to the cache vm_area_struct of size 168 [ 47.490894] The buggy address is located 88 bytes inside of [ 47.490894] freed 168-byte region [ffff88800daf8cb0, ffff88800daf8d58) [ 47.491859] [ 47.492009] The buggy address belongs to the physical page: [ 47.492513] page:00000000952771e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaf8 [ 47.493245] memcg:ffff88800fcf0b01 [ 47.493539] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.494001] page_type: 0xffffffff() [ 47.494317] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.494953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcf0b01 [ 47.495592] page dumped because: kasan: bad access detected [ 47.496054] [ 47.496203] Memory state around the buggy address: [ 47.496636] ffff88800daf8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 47.497222] ffff88800daf8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 47.497801] >ffff88800daf8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 47.498373] ^ [ 47.498660] ffff88800daf8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.499263] ffff88800daf8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.499851] ================================================================== [ 47.500907] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 48.905086] BUG: Bad rss-counter state mm:00000000aa56e279 type:MM_FILEPAGES val:33 [ 48.905799] BUG: Bad rss-counter state mm:00000000aa56e279 type:MM_ANONPAGES val:22 [ 49.309807] BUG: Bad rss-counter state mm:000000001a653ec8 type:MM_FILEPAGES val:33 [ 49.310509] BUG: Bad rss-counter state mm:000000001a653ec8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34936' (ECDSA) to the list of known hosts. 2023/06/20 09:19:02 fuzzer started 2023/06/20 09:19:02 dialing manager at localhost:44161 2023/06/20 09:19:02 checking machine... 2023/06/20 09:19:02 checking revisions... [ 49.889113] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:19:02 testing simple program... [ 49.928921] cgroup: Unknown subsys name 'net' [ 49.977545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:46 Registers: info registers vcpu 0 RAX=1ffffffff0c0abd1 RBX=ffffffff86055e8c RCX=ffffffff8661f20e RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86055e78 RSP=ffff88806ce09998 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86055ea0 R13=ffffffff85d793d4 R14=ffffffff86055e74 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 0000000000000000 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=00007fff599c4848 CR3=000000000dc26000 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=2032303a39313a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110019ce4a0 RDX=1ffff110019ce4ae RSI=0000000000000004 RDI=ffff88800ce72574 RBP=0000000000000540 RSP=ffff888006ad7cd8 R8 =0000000000000001 R9 =ffffed10019ce4aa R10=ffff88800ce72553 R11=00000000000b6996 R12=ffff888018a50b80 R13=0000000000000000 R14=ffff88800ce72508 R15=ffff88800ce724c0 RIP=ffffffff818472f3 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 00007fed96a91900 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=00007fed97048618 CR3=0000000016b8c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000