[ 38.407403] BUG: Bad rss-counter state mm:000000005151ee4a type:MM_FILEPAGES val:33 [ 38.408818] BUG: Bad rss-counter state mm:000000005151ee4a type:MM_ANONPAGES val:22 [ 38.456097] ================================================================== [ 38.457041] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.457954] Read of size 8 at addr ffff88800d82d968 by task sshd/226 [ 38.458706] [ 38.458928] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.459778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.460732] Call Trace: [ 38.461060] [ 38.461340] dump_stack_lvl+0x91/0xf0 [ 38.461827] print_report+0xcc/0x620 [ 38.462305] ? __virt_addr_valid+0x102/0x340 [ 38.462852] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.463460] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.464092] kasan_report+0xbe/0xf0 [ 38.464576] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.465241] vma_interval_tree_remove+0xc75/0xec0 [ 38.465857] vma_prepare+0xc54/0x11a0 [ 38.466348] __split_vma+0x5af/0x950 [ 38.466823] ? __pfx___split_vma+0x10/0x10 [ 38.467365] ? find_held_lock+0x2c/0x110 [ 38.467898] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.468476] ? lock_is_held_type+0x9f/0x120 [ 38.469060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.469678] ? mtree_range_walk+0x632/0x900 [ 38.470244] ? mas_walk+0x5c7/0x7c0 [ 38.470722] do_vmi_munmap+0x1f1/0x2b0 [ 38.471226] mmap_region+0x1f9/0x2660 [ 38.471713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.472239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.472995] ? __pfx_lock_acquire+0x10/0x10 [ 38.473541] ? __pfx_mmap_region+0x10/0x10 [ 38.474089] ? security_mmap_addr+0x7d/0xa0 [ 38.474630] ? get_unmapped_area+0x1f5/0x3f0 [ 38.475201] do_mmap+0x854/0xf00 [ 38.475644] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.476154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.476726] ksys_mmap_pgoff+0x3af/0x500 [ 38.477282] do_syscall_64+0x3f/0x90 [ 38.477772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.478445] RIP: 0033:0x7fdf57821d82 [ 38.478912] 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 [ 38.481355] RSP: 002b:00007ffee136f558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.482310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf57821d82 [ 38.483140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf56c5b000 [ 38.483961] RBP: 00007fdf56c5b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.484783] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed22e46d90 [ 38.485660] R13: 00007ffee136f570 R14: 00007ffee136f5a0 R15: 00007ffee136f900 [ 38.486499] [ 38.486785] [ 38.487000] Allocated by task 215: [ 38.487420] kasan_save_stack+0x22/0x50 [ 38.487917] kasan_set_track+0x25/0x30 [ 38.488403] __kasan_slab_alloc+0x59/0x70 [ 38.488937] kmem_cache_alloc+0x16b/0x370 [ 38.489445] vm_area_dup+0x20/0x160 [ 38.489890] __split_vma+0x170/0x950 [ 38.490346] split_vma+0xc6/0x110 [ 38.490775] mprotect_fixup+0x8d2/0xb30 [ 38.491265] do_mprotect_pkey+0x87e/0xd40 [ 38.491773] __x64_sys_mprotect+0x78/0xc0 [ 38.492281] do_syscall_64+0x3f/0x90 [ 38.492746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.493419] [ 38.493632] Freed by task 215: [ 38.494022] kasan_save_stack+0x22/0x50 [ 38.494515] kasan_set_track+0x25/0x30 [ 38.494995] kasan_save_free_info+0x2b/0x50 [ 38.495513] __kasan_slab_free+0x10a/0x190 [ 38.496037] kmem_cache_free+0x10d/0x4d0 [ 38.496535] rcu_core+0x8c8/0x2860 [ 38.496988] __do_softirq+0x1b7/0x7d4 [ 38.497457] [ 38.497672] Last potentially related work creation: [ 38.498237] kasan_save_stack+0x22/0x50 [ 38.498724] __kasan_record_aux_stack+0x8e/0xa0 [ 38.499280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.499898] remove_vma+0x139/0x170 [ 38.500330] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.500883] do_vmi_munmap+0x1f1/0x2b0 [ 38.501370] __vm_munmap+0x138/0x3a0 [ 38.501822] __x64_sys_munmap+0x59/0x80 [ 38.502306] do_syscall_64+0x3f/0x90 [ 38.502776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.503400] [ 38.503612] The buggy address belongs to the object at ffff88800d82d910 [ 38.503612] which belongs to the cache vm_area_struct of size 168 [ 38.505043] The buggy address is located 88 bytes inside of [ 38.505043] freed 168-byte region [ffff88800d82d910, ffff88800d82d9b8) [ 38.506394] [ 38.506603] The buggy address belongs to the physical page: [ 38.507243] page:00000000a50908b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd82d [ 38.508299] memcg:ffff88800cefe401 [ 38.508709] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.509361] page_type: 0xffffffff() [ 38.509795] raw: 0100000000000200 ffff8880087a0c80 ffffea0000371280 dead00000000000c [ 38.510686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cefe401 [ 38.511563] page dumped because: kasan: bad access detected [ 38.512206] [ 38.512412] Memory state around the buggy address: [ 38.512987] ffff88800d82d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.513811] ffff88800d82d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.514624] >ffff88800d82d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.515419] ^ [ 38.516150] ffff88800d82d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.517005] ffff88800d82da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.517841] ================================================================== [ 38.518955] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.414982] BUG: Bad rss-counter state mm:0000000050d56dc0 type:MM_FILEPAGES val:33 [ 41.416238] BUG: Bad rss-counter state mm:0000000050d56dc0 type:MM_ANONPAGES val:22 [ 41.935696] BUG: Bad rss-counter state mm:00000000a0599196 type:MM_FILEPAGES val:33 [ 41.936988] BUG: Bad rss-counter state mm:00000000a0599196 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34212' (ECDSA) to the list of known hosts. 2023/06/21 00:09:28 fuzzer started 2023/06/21 00:09:28 dialing manager at localhost:36067 2023/06/21 00:09:28 checking machine... 2023/06/21 00:09:28 checking revisions... [ 42.812069] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:09:28 testing simple program... [ 42.863324] cgroup: Unknown subsys name 'net' [ 42.944127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:09:28 Registers: info registers vcpu 0 RAX=ffff88800d59e880 RBX=0000000000000000 RCX=ffff88806cb217e8 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801460f988 R8 =0000000010607df5 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888014639b40 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff81ade6ad 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 00007ff742b50900 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=00007ffe1d650a68 CR3=000000000cac6000 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=d7065c45668890bda647d707a079918a XMM02=2c67c8bc2e329bc300000000001205b0 XMM03=375afdebbf381c810000000000123200 XMM04=e71ab3c343bbaca000000000000ae988 XMM05=1319e678c5640f8a0000000000133b80 XMM06=405749d8372a36f10000000000133ae8 XMM07=58f17c1affdc82d60000000000124390 XMM08=406589be3f9c4b2200000000001241f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100d9c5741 RBX=0000000000015e72 RCX=0000000000000000 RDX=ffff88800fea8000 RSI=ffffffff813bde45 RDI=ffff88806ce2ba08 RBP=ffff88806ce2b9c0 RSP=ffff88806cf09cd0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88806cf3a100 R14=dffffc0000000000 R15=ffff88806cf395c0 RIP=ffffffff813bde5f RFL=00000087 [--S--PC] 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 00007fc719bf6900 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=00007fc71a1ae0b0 CR3=000000000cc46000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000