[ 38.773355] BUG: Bad rss-counter state mm:00000000a8b101a1 type:MM_FILEPAGES val:33 [ 38.775415] BUG: Bad rss-counter state mm:00000000a8b101a1 type:MM_ANONPAGES val:22 [ 38.939428] ================================================================== [ 38.940509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.941632] Read of size 8 at addr ffff88800c792880 by task sshd/219 [ 38.942819] [ 38.943099] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.944098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.945242] Call Trace: [ 38.945603] [ 38.945918] dump_stack_lvl+0x91/0xf0 [ 38.946479] print_report+0xcc/0x620 [ 38.947017] ? __virt_addr_valid+0x102/0x340 [ 38.947657] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948353] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949059] kasan_report+0xbe/0xf0 [ 38.949601] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.950305] vma_interval_tree_remove+0xc75/0xec0 [ 38.950979] vma_prepare+0xc54/0x11a0 [ 38.951538] __split_vma+0x5af/0x950 [ 38.952079] ? __pfx___split_vma+0x10/0x10 [ 38.952675] ? find_held_lock+0x2c/0x110 [ 38.953295] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.953931] ? lock_is_held_type+0x9f/0x120 [ 38.954546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.955250] ? mtree_range_walk+0x632/0x900 [ 38.955872] ? mas_walk+0x5c7/0x7c0 [ 38.956419] do_vmi_munmap+0x1f1/0x2b0 [ 38.956984] mmap_region+0x1f9/0x2660 [ 38.957536] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.958128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.958921] ? __pfx_lock_acquire+0x10/0x10 [ 38.959543] ? __pfx_mmap_region+0x10/0x10 [ 38.960150] ? security_mmap_addr+0x7d/0xa0 [ 38.960745] ? get_unmapped_area+0x1f5/0x3f0 [ 38.961399] do_mmap+0x854/0xf00 [ 38.961893] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.962457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.963105] ksys_mmap_pgoff+0x3af/0x500 [ 38.963683] do_syscall_64+0x3f/0x90 [ 38.964235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964970] RIP: 0033:0x7f4c07b85d82 [ 38.965449] 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 [ 38.967654] RSP: 002b:00007ffdb52c7e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.968586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c07b85d82 [ 38.969472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c06fbf000 [ 38.970350] RBP: 00007f4c06fbf000 R08: 0000000000000009 R09: 0000000000001000 [ 38.971232] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f462e90ec0 [ 38.972097] R13: 00007ffdb52c7e90 R14: 00007ffdb52c7ec0 R15: 00007ffdb52c8220 [ 38.972987] [ 38.973304] [ 38.973522] Allocated by task 212: [ 38.973954] kasan_save_stack+0x22/0x50 [ 38.974479] kasan_set_track+0x25/0x30 [ 38.974984] __kasan_slab_alloc+0x59/0x70 [ 38.975539] kmem_cache_alloc+0x16b/0x370 [ 38.976070] vm_area_dup+0x20/0x160 [ 38.976539] __split_vma+0x170/0x950 [ 38.977036] split_vma+0xc6/0x110 [ 38.977520] mprotect_fixup+0x8d2/0xb30 [ 38.978050] do_mprotect_pkey+0x87e/0xd40 [ 38.978623] __x64_sys_mprotect+0x78/0xc0 [ 38.979197] do_syscall_64+0x3f/0x90 [ 38.979694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980393] [ 38.980619] Freed by task 212: [ 38.981039] kasan_save_stack+0x22/0x50 [ 38.981581] kasan_set_track+0x25/0x30 [ 38.982124] kasan_save_free_info+0x2b/0x50 [ 38.982692] __kasan_slab_free+0x10a/0x190 [ 38.983343] kmem_cache_free+0x10d/0x4d0 [ 38.984012] rcu_core+0x8c8/0x2860 [ 38.984496] __do_softirq+0x1b7/0x7d4 [ 38.985006] [ 38.985254] Last potentially related work creation: [ 38.985863] kasan_save_stack+0x22/0x50 [ 38.986413] __kasan_record_aux_stack+0x8e/0xa0 [ 38.987014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.987721] remove_vma+0x139/0x170 [ 38.988202] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.988780] do_vmi_munmap+0x1f1/0x2b0 [ 38.989324] __vm_munmap+0x138/0x3a0 [ 38.989806] __x64_sys_munmap+0x59/0x80 [ 38.990338] do_syscall_64+0x3f/0x90 [ 38.990826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.991550] [ 38.991777] The buggy address belongs to the object at ffff88800c792828 [ 38.991777] which belongs to the cache vm_area_struct of size 168 [ 38.993389] The buggy address is located 88 bytes inside of [ 38.993389] freed 168-byte region [ffff88800c792828, ffff88800c7928d0) [ 38.994821] [ 38.995042] The buggy address belongs to the physical page: [ 38.995726] page:00000000ff481314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc792 [ 38.996818] memcg:ffff88800e2b7501 [ 38.997277] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.997977] page_type: 0xffffffff() [ 38.998443] raw: 0100000000000200 ffff8880087a0c80 ffffea00003286c0 dead000000000005 [ 38.999389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2b7501 [ 39.000304] page dumped because: kasan: bad access detected [ 39.000973] [ 39.001206] Memory state around the buggy address: [ 39.001784] ffff88800c792780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.002715] ffff88800c792800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.003900] >ffff88800c792880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.005054] ^ [ 39.005479] ffff88800c792900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.006386] ffff88800c792980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.007293] ================================================================== [ 39.008368] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.239120] BUG: Bad rss-counter state mm:000000005c5bcc8f type:MM_FILEPAGES val:33 [ 41.239996] BUG: Bad rss-counter state mm:000000005c5bcc8f type:MM_ANONPAGES val:22 [ 41.618079] BUG: Bad rss-counter state mm:000000007db0db79 type:MM_FILEPAGES val:33 [ 41.618632] BUG: Bad rss-counter state mm:000000007db0db79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41929' (ECDSA) to the list of known hosts. 2023/06/21 00:05:38 fuzzer started 2023/06/21 00:05:39 dialing manager at localhost:36067 2023/06/21 00:05:39 checking machine... 2023/06/21 00:05:39 checking revisions... [ 42.114946] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:05:39 testing simple program... [ 42.161789] cgroup: Unknown subsys name 'net' [ 42.241659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:05:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=000055b2a0cbbd44 CR3=0000000015b30000 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=2038333a35303a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815343f6 RDX=1ffff1100d9e6a00 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81839db7 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=ffff88800ed10800 RIP=ffffffff8135b95c RFL=00000016 [----AP-] 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 00007f9994f3c900 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=00007f99954f40b0 CR3=000000000d84e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000