[ 24.296825] BUG: Bad rss-counter state mm:0000000036d6e995 type:MM_FILEPAGES val:33 [ 24.297805] BUG: Bad rss-counter state mm:0000000036d6e995 type:MM_ANONPAGES val:22 [ 24.434132] ================================================================== [ 24.435230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.436361] Read of size 8 at addr ffff88801afc0798 by task sshd/220 [ 24.437368] [ 24.437685] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.438716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.440044] Call Trace: [ 24.440474] [ 24.440859] dump_stack_lvl+0x91/0xf0 [ 24.441517] print_report+0xcc/0x620 [ 24.442166] ? __virt_addr_valid+0x102/0x340 [ 24.442914] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.443743] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.444610] kasan_report+0xbe/0xf0 [ 24.445244] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.446082] vma_interval_tree_remove+0xc75/0xec0 [ 24.446897] vma_prepare+0xc54/0x11a0 [ 24.447544] __split_vma+0x5af/0x950 [ 24.448210] ? __pfx___split_vma+0x10/0x10 [ 24.448617] ? find_held_lock+0x2c/0x110 [ 24.449001] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.449418] ? lock_is_held_type+0x9f/0x120 [ 24.449814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.450259] ? mtree_range_walk+0x632/0x900 [ 24.450669] ? mas_walk+0x5c7/0x7c0 [ 24.451018] do_vmi_munmap+0x1f1/0x2b0 [ 24.451383] mmap_region+0x1f9/0x2660 [ 24.451738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.452119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.452642] ? __pfx_lock_acquire+0x10/0x10 [ 24.453034] ? __pfx_mmap_region+0x10/0x10 [ 24.453423] ? security_mmap_addr+0x7d/0xa0 [ 24.453814] ? get_unmapped_area+0x1f5/0x3f0 [ 24.454218] do_mmap+0x854/0xf00 [ 24.454546] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.454912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.455323] ksys_mmap_pgoff+0x3af/0x500 [ 24.455698] do_syscall_64+0x3f/0x90 [ 24.456063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.456544] RIP: 0033:0x7fcebf486d82 [ 24.456877] 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 [ 24.458424] RSP: 002b:00007ffd4b894468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.459088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcebf486d82 [ 24.459713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcebe8c0000 [ 24.460369] RBP: 00007fcebe8c0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.460962] R10: 0000000000000812 R11: 0000000000000206 R12: 000056004c327ec0 [ 24.461573] R13: 00007ffd4b894480 R14: 00007ffd4b8944b0 R15: 00007ffd4b894810 [ 24.462182] [ 24.462401] [ 24.462556] Allocated by task 208: [ 24.462861] kasan_save_stack+0x22/0x50 [ 24.463219] kasan_set_track+0x25/0x30 [ 24.463592] __kasan_slab_alloc+0x59/0x70 [ 24.463975] kmem_cache_alloc+0x16b/0x370 [ 24.464359] vm_area_dup+0x20/0x160 [ 24.464682] __split_vma+0x170/0x950 [ 24.465015] split_vma+0xc6/0x110 [ 24.465335] mprotect_fixup+0x8d2/0xb30 [ 24.465692] do_mprotect_pkey+0x87e/0xd40 [ 24.466064] __x64_sys_mprotect+0x78/0xc0 [ 24.466448] do_syscall_64+0x3f/0x90 [ 24.466785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.467237] [ 24.467414] Freed by task 208: [ 24.467692] kasan_save_stack+0x22/0x50 [ 24.468065] kasan_set_track+0x25/0x30 [ 24.468432] kasan_save_free_info+0x2b/0x50 [ 24.468811] __kasan_slab_free+0x10a/0x190 [ 24.469188] kmem_cache_free+0x10d/0x4d0 [ 24.469562] rcu_core+0x8c8/0x2860 [ 24.469879] __do_softirq+0x1b7/0x7d4 [ 24.470215] [ 24.470384] Last potentially related work creation: [ 24.470798] kasan_save_stack+0x22/0x50 [ 24.471152] __kasan_record_aux_stack+0x8e/0xa0 [ 24.471586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.472051] remove_vma+0x139/0x170 [ 24.472385] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.472783] do_vmi_munmap+0x1f1/0x2b0 [ 24.473128] __vm_munmap+0x138/0x3a0 [ 24.473474] __x64_sys_munmap+0x59/0x80 [ 24.473829] do_syscall_64+0x3f/0x90 [ 24.474167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.474635] [ 24.474791] The buggy address belongs to the object at ffff88801afc0740 [ 24.474791] which belongs to the cache vm_area_struct of size 168 [ 24.475852] The buggy address is located 88 bytes inside of [ 24.475852] freed 168-byte region [ffff88801afc0740, ffff88801afc07e8) [ 24.476880] [ 24.477036] The buggy address belongs to the physical page: [ 24.477521] page:00000000eb2d7ff7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1afc0 [ 24.478291] memcg:ffff88801af79e01 [ 24.478612] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.479071] page_type: 0xffffffff() [ 24.479492] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.480154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801af79e01 [ 24.480802] page dumped because: kasan: bad access detected [ 24.481269] [ 24.481433] Memory state around the buggy address: [ 24.481841] ffff88801afc0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.482455] ffff88801afc0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.483058] >ffff88801afc0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.483680] ^ [ 24.484040] ffff88801afc0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.484656] ffff88801afc0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.485257] ================================================================== [ 24.486010] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.851462] BUG: Bad rss-counter state mm:00000000f41eb9fb type:MM_FILEPAGES val:33 [ 26.852406] BUG: Bad rss-counter state mm:00000000f41eb9fb type:MM_ANONPAGES val:22 [ 27.189123] BUG: Bad rss-counter state mm:0000000055b46f06 type:MM_FILEPAGES val:33 [ 27.190181] BUG: Bad rss-counter state mm:0000000055b46f06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56311' (ECDSA) to the list of known hosts. 2023/06/19 18:17:13 fuzzer started 2023/06/19 18:17:13 dialing manager at localhost:44161 2023/06/19 18:17:13 checking machine... 2023/06/19 18:17:13 checking revisions... [ 27.927546] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:17:13 testing simple program... [ 27.966559] cgroup: Unknown subsys name 'net' [ 28.032326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019bb1b40 RCX=0000000000000000 RDX=1ffff110033763e7 RSI=ffffffff814c84fa RDI=ffff888019bb1f38 RBP=ffff888019bb1b40 RSP=ffff88800fbef480 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888019bb1b40 R13=0000000000000000 R14=ffffffff85652a88 R15=00000000000000e8 RIP=ffffffff81374531 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 00007f47d5892900 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=00007f47d5e49618 CR3=00000000164ca000 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=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 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=00007f8eadb9ff00 CR3=000000000f3c6000 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=54c7e71196b5d58a524c979e751be436 XMM02=000000000011d6b8ec2efd57dc4c00df XMM03=0000000000122c309094acf82d0b1d81 XMM04=35fc5403ba5d3aef00000000000ae988 XMM05=19e9129bd510f23500000000001331c0 XMM06=f10ecd4072383e1d0000000000132398 XMM07=e042d86d42eb936e0000000000122eb0 XMM08=9094acf82d0b1d81000000000011d718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000