[ 152.212115] BUG: Bad rss-counter state mm:000000002cd7fbdf type:MM_FILEPAGES val:33 [ 152.214053] BUG: Bad rss-counter state mm:000000002cd7fbdf type:MM_ANONPAGES val:22 [ 152.374141] ================================================================== [ 152.375087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 152.376007] Read of size 8 at addr ffff88801a7b1c20 by task sshd/220 [ 152.376757] [ 152.376973] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 152.378124] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 152.379123] Call Trace: [ 152.379442] [ 152.379722] dump_stack_lvl+0x91/0xf0 [ 152.380205] print_report+0xcc/0x620 [ 152.380684] ? __virt_addr_valid+0x102/0x340 [ 152.381243] ? vma_interval_tree_remove+0xc75/0xec0 [ 152.381850] ? vma_interval_tree_remove+0xc75/0xec0 [ 152.382471] kasan_report+0xbe/0xf0 [ 152.382941] ? vma_interval_tree_remove+0xc75/0xec0 [ 152.383572] vma_interval_tree_remove+0xc75/0xec0 [ 152.384168] vma_prepare+0xc54/0x11a0 [ 152.384639] __split_vma+0x5af/0x950 [ 152.385113] ? __pfx___split_vma+0x10/0x10 [ 152.385634] ? find_held_lock+0x2c/0x110 [ 152.386157] do_vmi_align_munmap+0x2ba/0x11f0 [ 152.386715] ? lock_is_held_type+0x9f/0x120 [ 152.387261] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 152.387860] ? mtree_range_walk+0x632/0x900 [ 152.388410] ? mas_walk+0x5c7/0x7c0 [ 152.388883] do_vmi_munmap+0x1f1/0x2b0 [ 152.389378] mmap_region+0x1f9/0x2660 [ 152.389856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 152.390367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 152.391101] ? __pfx_lock_acquire+0x10/0x10 [ 152.391630] ? __pfx_mmap_region+0x10/0x10 [ 152.392169] ? security_mmap_addr+0x7d/0xa0 [ 152.392697] ? get_unmapped_area+0x1f5/0x3f0 [ 152.393255] do_mmap+0x854/0xf00 [ 152.393688] vm_mmap_pgoff+0x1a6/0x3a0 [ 152.394186] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 152.394742] ksys_mmap_pgoff+0x3af/0x500 [ 152.395257] do_syscall_64+0x3f/0x90 [ 152.395726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 152.396368] RIP: 0033:0x7f222fddcd82 [ 152.396821] 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 [ 152.398934] RSP: 002b:00007fff99268a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 152.399854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f222fddcd82 [ 152.400691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f222f216000 [ 152.401537] RBP: 00007f222f216000 R08: 0000000000000009 R09: 0000000000001000 [ 152.402388] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c395b3f70 [ 152.403235] R13: 00007fff99268a40 R14: 00007fff99268a70 R15: 00007fff99268dd0 [ 152.404079] [ 152.404371] [ 152.404584] Allocated by task 209: [ 152.405007] kasan_save_stack+0x22/0x50 [ 152.405510] kasan_set_track+0x25/0x30 [ 152.405998] __kasan_slab_alloc+0x59/0x70 [ 152.406516] kmem_cache_alloc+0x16b/0x370 [ 152.407036] vm_area_dup+0x20/0x160 [ 152.407493] __split_vma+0x170/0x950 [ 152.407966] split_vma+0xc6/0x110 [ 152.408404] mprotect_fixup+0x8d2/0xb30 [ 152.408906] do_mprotect_pkey+0x87e/0xd40 [ 152.409423] __x64_sys_mprotect+0x78/0xc0 [ 152.409966] do_syscall_64+0x3f/0x90 [ 152.410435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 152.411099] [ 152.411312] Freed by task 13: [ 152.411689] kasan_save_stack+0x22/0x50 [ 152.412189] kasan_set_track+0x25/0x30 [ 152.412679] kasan_save_free_info+0x2b/0x50 [ 152.413208] __kasan_slab_free+0x10a/0x190 [ 152.413737] kmem_cache_free+0x10d/0x4d0 [ 152.414246] rcu_core+0x8c8/0x2860 [ 152.414692] __do_softirq+0x1b7/0x7d4 [ 152.415182] [ 152.415395] Last potentially related work creation: [ 152.415973] kasan_save_stack+0x22/0x50 [ 152.416474] __kasan_record_aux_stack+0x8e/0xa0 [ 152.417059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 152.417700] remove_vma+0x139/0x170 [ 152.418151] do_vmi_align_munmap+0xd4a/0x11f0 [ 152.418699] do_vmi_munmap+0x1f1/0x2b0 [ 152.419191] __vm_munmap+0x138/0x3a0 [ 152.419650] __x64_sys_munmap+0x59/0x80 [ 152.420142] do_syscall_64+0x3f/0x90 [ 152.420613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 152.421248] [ 152.421463] The buggy address belongs to the object at ffff88801a7b1bc8 [ 152.421463] which belongs to the cache vm_area_struct of size 168 [ 152.422925] The buggy address is located 88 bytes inside of [ 152.422925] freed 168-byte region [ffff88801a7b1bc8, ffff88801a7b1c70) [ 152.424326] [ 152.424539] The buggy address belongs to the physical page: [ 152.425197] page:000000002d780b0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a7b1 [ 152.426287] memcg:ffff88801a77fd01 [ 152.426707] flags: 0x100000000000200(slab|node=0|zone=1) [ 152.427354] page_type: 0xffffffff() [ 152.427800] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 152.428700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a77fd01 [ 152.429590] page dumped because: kasan: bad access detected [ 152.430250] [ 152.430462] Memory state around the buggy address: [ 152.431052] ffff88801a7b1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 152.431903] ffff88801a7b1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 152.432755] >ffff88801a7b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 152.433602] ^ [ 152.434124] ffff88801a7b1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 152.434964] ffff88801a7b1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 152.435825] ================================================================== [ 152.436876] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 154.431352] BUG: Bad rss-counter state mm:0000000077d910aa type:MM_FILEPAGES val:33 [ 154.432553] BUG: Bad rss-counter state mm:0000000077d910aa type:MM_ANONPAGES val:22 [ 154.887430] BUG: Bad rss-counter state mm:00000000d4305ca0 type:MM_FILEPAGES val:33 [ 154.888595] BUG: Bad rss-counter state mm:00000000d4305ca0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30597' (ECDSA) to the list of known hosts. 2023/06/19 22:27:23 fuzzer started 2023/06/19 22:27:24 dialing manager at localhost:44161 2023/06/19 22:27:24 checking machine... 2023/06/19 22:27:24 checking revisions... [ 155.498436] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:27:24 testing simple program... [ 155.548332] cgroup: Unknown subsys name 'net' [ 155.610639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:25:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff81ef7be4 RDX=ffff888015c13680 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff88801940f858 R8 =0000000000000004 R9 =0000000000000005 R10=0000000000000005 R11=00000000000b6996 R12=ffff88800cc3d208 R13=0000000000000008 R14=0000000000000005 R15=0000000000000005 RIP=ffffffff814c01fc 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 00007fc737b35900 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=00007fc7380ed0b0 CR3=0000000018fa0000 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=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 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=00007f5a2756d000 CR3=000000000e390000 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=2033323a37323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000