[ 28.480428] BUG: Bad rss-counter state mm:00000000e4087fc3 type:MM_FILEPAGES val:33 [ 28.481430] BUG: Bad rss-counter state mm:00000000e4087fc3 type:MM_ANONPAGES val:22 [ 28.645183] ================================================================== [ 28.646113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.647062] Read of size 8 at addr ffff88800eacfc20 by task sshd/219 [ 28.647838] [ 28.648057] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.649022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.650019] Call Trace: [ 28.650335] [ 28.650617] dump_stack_lvl+0x91/0xf0 [ 28.651105] print_report+0xcc/0x620 [ 28.651585] ? __virt_addr_valid+0x102/0x340 [ 28.652138] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.652772] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.653393] kasan_report+0xbe/0xf0 [ 28.653878] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.654498] vma_interval_tree_remove+0xc75/0xec0 [ 28.655093] vma_prepare+0xc54/0x11a0 [ 28.655569] __split_vma+0x5af/0x950 [ 28.656051] ? __pfx___split_vma+0x10/0x10 [ 28.656587] ? find_held_lock+0x2c/0x110 [ 28.657102] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.657677] ? lock_is_held_type+0x9f/0x120 [ 28.658211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.658822] ? mtree_range_walk+0x632/0x900 [ 28.659375] ? mas_walk+0x5c7/0x7c0 [ 28.659850] do_vmi_munmap+0x1f1/0x2b0 [ 28.660348] mmap_region+0x1f9/0x2660 [ 28.660828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.661345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.662080] ? __pfx_lock_acquire+0x10/0x10 [ 28.662617] ? __pfx_mmap_region+0x10/0x10 [ 28.663152] ? security_mmap_addr+0x7d/0xa0 [ 28.663689] ? get_unmapped_area+0x1f5/0x3f0 [ 28.664245] do_mmap+0x854/0xf00 [ 28.664695] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.665194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.665756] ksys_mmap_pgoff+0x3af/0x500 [ 28.666266] do_syscall_64+0x3f/0x90 [ 28.666753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.667403] RIP: 0033:0x7fa2189c1d82 [ 28.667864] 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 [ 28.670001] RSP: 002b:00007ffca2b724c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.670916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2189c1d82 [ 28.671763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa217dfb000 [ 28.672612] RBP: 00007fa217dfb000 R08: 0000000000000009 R09: 0000000000001000 [ 28.673457] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b712bb1ec0 [ 28.674313] R13: 00007ffca2b724e0 R14: 00007ffca2b72510 R15: 00007ffca2b72870 [ 28.675177] [ 28.675472] [ 28.675696] Allocated by task 211: [ 28.676134] kasan_save_stack+0x22/0x50 [ 28.676646] kasan_set_track+0x25/0x30 [ 28.677140] __kasan_slab_alloc+0x59/0x70 [ 28.677679] kmem_cache_alloc+0x16b/0x370 [ 28.678196] vm_area_dup+0x20/0x160 [ 28.678657] __split_vma+0x170/0x950 [ 28.679127] split_vma+0xc6/0x110 [ 28.679582] mprotect_fixup+0x8d2/0xb30 [ 28.680091] do_mprotect_pkey+0x87e/0xd40 [ 28.680611] __x64_sys_mprotect+0x78/0xc0 [ 28.681138] do_syscall_64+0x3f/0x90 [ 28.681612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.682256] [ 28.682474] Freed by task 13: [ 28.682861] kasan_save_stack+0x22/0x50 [ 28.683365] kasan_set_track+0x25/0x30 [ 28.683863] kasan_save_free_info+0x2b/0x50 [ 28.684409] __kasan_slab_free+0x10a/0x190 [ 28.684952] kmem_cache_free+0x10d/0x4d0 [ 28.685510] rcu_core+0x8c8/0x2860 [ 28.685957] __do_softirq+0x1b7/0x7d4 [ 28.686432] [ 28.686645] Last potentially related work creation: [ 28.687226] kasan_save_stack+0x22/0x50 [ 28.687741] __kasan_record_aux_stack+0x8e/0xa0 [ 28.688320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.688985] remove_vma+0x139/0x170 [ 28.689448] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.690020] do_vmi_munmap+0x1f1/0x2b0 [ 28.690511] __vm_munmap+0x138/0x3a0 [ 28.690986] __x64_sys_munmap+0x59/0x80 [ 28.691495] do_syscall_64+0x3f/0x90 [ 28.691962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.692598] [ 28.692811] Second to last potentially related work creation: [ 28.693505] kasan_save_stack+0x22/0x50 [ 28.694014] __kasan_record_aux_stack+0x8e/0xa0 [ 28.694594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.695267] remove_vma+0x139/0x170 [ 28.695730] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.696311] do_vmi_munmap+0x1f1/0x2b0 [ 28.696821] mmap_region+0x1f9/0x2660 [ 28.697318] do_mmap+0x854/0xf00 [ 28.697775] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.698284] ksys_mmap_pgoff+0x3af/0x500 [ 28.698798] do_syscall_64+0x3f/0x90 [ 28.699295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.699946] [ 28.700177] The buggy address belongs to the object at ffff88800eacfbc8 [ 28.700177] which belongs to the cache vm_area_struct of size 168 [ 28.701668] The buggy address is located 88 bytes inside of [ 28.701668] freed 168-byte region [ffff88800eacfbc8, ffff88800eacfc70) [ 28.703085] [ 28.703302] The buggy address belongs to the physical page: [ 28.703962] page:00000000ab7c962d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeacf [ 28.705041] memcg:ffff88800ebdab01 [ 28.705484] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.706230] page_type: 0xffffffff() [ 28.706704] raw: 0100000000000200 ffff88800879fc80 ffffea0000364700 dead000000000005 [ 28.707657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebdab01 [ 28.708593] page dumped because: kasan: bad access detected [ 28.709286] [ 28.709515] Memory state around the buggy address: [ 28.710122] ffff88800eacfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.711015] ffff88800eacfb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.711908] >ffff88800eacfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.712788] ^ [ 28.713343] ffff88800eacfc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.714240] ffff88800eacfd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.715123] ================================================================== [ 28.716122] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.949198] BUG: Bad rss-counter state mm:00000000ef5c37a4 type:MM_FILEPAGES val:33 [ 30.949935] BUG: Bad rss-counter state mm:00000000ef5c37a4 type:MM_ANONPAGES val:22 [ 31.396106] BUG: Bad rss-counter state mm:000000007304459d type:MM_FILEPAGES val:33 [ 31.397075] BUG: Bad rss-counter state mm:000000007304459d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3054' (ECDSA) to the list of known hosts. 2023/06/19 23:01:07 fuzzer started 2023/06/19 23:01:08 dialing manager at localhost:44161 2023/06/19 23:01:08 checking machine... 2023/06/19 23:01:08 checking revisions... [ 32.074305] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:01:08 testing simple program... [ 32.114281] cgroup: Unknown subsys name 'net' [ 32.166177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff840894ad RDX=0000000000000001 RSI=0000000000000001 RDI=0000000000000007 RBP=ffffffff85c58900 RSP=ffff888009b17b98 R8 =0000000000000007 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6996 R12=ffff888009b17d28 R13=0000000000000000 R14=ffffffff85a63a00 R15=0000000000000001 RIP=ffffffff814c01d0 RFL=00000293 [--S-A-C] 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 00007fb06b80d900 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=00007ffdde6b6000 CR3=0000000018ccc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f57c6b26350 CR3=000000000de9c000 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=2037303a31303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000