loop0: detected capacity change from 0 to 32768
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,journal_flush_disabled,nojournal_transaction_names,reconstruct_alloc,version_upgrade=incompatible
bcachefs (loop0): recovering from clean shutdown, journal seq 13
bcachefs (loop0): dropping and reconstructing all alloc info
==================================================================
BUG: KASAN: stack-out-of-bounds in sg_mark_end include/linux/scatterlist.h:258 [inline]
BUG: KASAN: stack-out-of-bounds in do_encrypt+0xa22/0xd70 fs/bcachefs/checksum.c:157
Read of size 8 at addr ffffc9000d416908 by task syz.0.0/5316

CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller-00012-g0bc21e701a6f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 sg_mark_end include/linux/scatterlist.h:258 [inline]
 do_encrypt+0xa22/0xd70 fs/bcachefs/checksum.c:157
 bset_encrypt fs/bcachefs/btree_io.h:118 [inline]
 bch2_btree_node_read_done+0x1dfc/0x5e90 fs/bcachefs/btree_io.c:1070
 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1323
 bch2_btree_node_read+0x2433/0x29f0
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline]
 bch2_btree_root_read+0x617/0x7a0 fs/bcachefs/btree_io.c:1771
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x2585/0x39d0 fs/bcachefs/recovery.c:853
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3df1d874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3df2c75e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3df2c75ef0 RCX: 00007f3df1d874ca
RDX: 00000000200004c0 RSI: 000000002000f680 RDI: 00007f3df2c75eb0
RBP: 00000000200004c0 R08: 00007f3df2c75ef0 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000000246 R12: 000000002000f680
R13: 00007f3df2c75eb0 R14: 000000000000f62b R15: 0000000020000140
 </TASK>

The buggy address belongs to stack of task syz.0.0/5316
 and is located at offset 1768 in frame:
 do_encrypt+0x0/0xd70

This frame has 8 objects:
 [32, 48) 'nonce.i242'
 [64, 528) '__req_desc.i243'
 [592, 608) 'nonce.i224'
 [624, 1088) '__req_desc.i225'
 [1152, 1168) 'nonce.i'
 [1184, 1648) '__req_desc.i'
 [1712, 1744) 'sg'
 [1776, 1928) 'sgl'

The buggy address belongs to the virtual mapping at
 [ffffc9000d410000, ffffc9000d419000) created by:
 copy_process+0x5d1/0x3d50 kernel/fork.c:2224

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35aaa
memcg:ffff888036b18202
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888036b18202
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 5315, tgid 5315 (syz.0.0), ts 67370165814, free_ts 67298457061
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558
 prep_new_page mm/page_alloc.c:1566 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3846
 alloc_thread_stack_node kernel/fork.c:314 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1116
 copy_process+0x5d1/0x3d50 kernel/fork.c:2224
 kernel_clone+0x226/0x8e0 kernel/fork.c:2806
 __do_sys_clone3 kernel/fork.c:3110 [inline]
 __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3089
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5298 tgid 5298 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2659
 __slab_free+0x2c2/0x380 mm/slub.c:4524
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4119 [inline]
 slab_alloc_node mm/slub.c:4168 [inline]
 kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4187
 shmem_alloc_inode+0x28/0x40 mm/shmem.c:4982
 alloc_inode+0x65/0x1a0 fs/inode.c:336
 new_inode_pseudo fs/inode.c:1174 [inline]
 new_inode+0x22/0x1d0 fs/inode.c:1193
 __shmem_get_inode mm/shmem.c:2876 [inline]
 shmem_get_inode+0x39d/0xf20 mm/shmem.c:2950
 shmem_mknod+0x191/0x3d0 mm/shmem.c:3672
 shmem_mkdir+0x33/0x70 mm/shmem.c:3738
 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311
 do_mkdirat+0x264/0x3a0 fs/namei.c:4334
 __do_sys_mkdirat fs/namei.c:4349 [inline]
 __se_sys_mkdirat fs/namei.c:4347 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83

Memory state around the buggy address:
 ffffc9000d416800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000d416880: 00 00 f2 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 f2 f2
>ffffc9000d416900: f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                      ^
 ffffc9000d416980: 00 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3 f3
 ffffc9000d416a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================