================================================================== BUG: KASAN: slab-use-after-free in sg_assign_page include/linux/scatterlist.h:109 [inline] BUG: KASAN: slab-use-after-free in sg_set_page include/linux/scatterlist.h:139 [inline] BUG: KASAN: slab-use-after-free in __blk_bvec_map_sg block/blk-merge.c:501 [inline] BUG: KASAN: slab-use-after-free in __blk_bios_map_sg block/blk-merge.c:548 [inline] BUG: KASAN: slab-use-after-free in __blk_rq_map_sg+0xf74/0xfd0 block/blk-merge.c:575 Read of size 8 at addr ffff88807d7dcc80 by task syz-executor.3/11051 CPU: 1 PID: 11051 Comm: syz-executor.3 Not tainted 6.2.0-rc6-next-20230202-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 sg_assign_page include/linux/scatterlist.h:109 [inline] sg_set_page include/linux/scatterlist.h:139 [inline] __blk_bvec_map_sg block/blk-merge.c:501 [inline] __blk_bios_map_sg block/blk-merge.c:548 [inline] __blk_rq_map_sg+0xf74/0xfd0 block/blk-merge.c:575 scsi_alloc_sgtables+0x236/0xf70 drivers/scsi/scsi_lib.c:1048 sd_setup_read_write_cmnd drivers/scsi/sd.c:1136 [inline] sd_init_command+0x67a/0x32a0 drivers/scsi/sd.c:1260 scsi_prepare_cmd drivers/scsi/scsi_lib.c:1603 [inline] scsi_queue_rq+0x1e7b/0x3a40 drivers/scsi/scsi_lib.c:1737 blk_mq_dispatch_rq_list+0x710/0x23f0 block/blk-mq.c:2056 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline] blk_mq_do_dispatch_sched+0x95e/0xc20 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x26d/0x3e0 block/blk-mq-sched.c:313 blk_mq_sched_dispatch_requests+0x10a/0x190 block/blk-mq-sched.c:339 __blk_mq_run_hw_queue+0x2b7/0x480 block/blk-mq.c:2174 __blk_mq_delay_run_hw_queue+0x5f7/0x700 block/blk-mq.c:2250 blk_mq_run_hw_queue+0x3b5/0x560 block/blk-mq.c:2298 blk_mq_sched_insert_requests+0x1d9/0xb30 block/blk-mq-sched.c:493 blk_mq_dispatch_plug_list block/blk-mq.c:2758 [inline] blk_mq_flush_plug_list+0x39c/0xe10 block/blk-mq.c:2800 __blk_flush_plug block/blk-core.c:1150 [inline] blk_finish_plug block/blk-core.c:1174 [inline] blk_finish_plug+0xbb/0x170 block/blk-core.c:1171 __iomap_dio_rw+0xf85/0x1d80 fs/iomap/direct-io.c:602 iomap_dio_rw+0x40/0xa0 fs/iomap/direct-io.c:682 ext4_dio_read_iter fs/ext4/file.c:94 [inline] ext4_file_read_iter+0x4be/0x690 fs/ext4/file.c:145 call_read_iter include/linux/fs.h:1845 [inline] generic_file_splice_read+0x182/0x4b0 fs/splice.c:309 do_splice_to+0x1b9/0x240 fs/splice.c:793 splice_direct_to_actor+0x2ab/0x8a0 fs/splice.c:865 do_splice_direct+0x1ab/0x280 fs/splice.c:974 do_sendfile+0xb19/0x12c0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa98ac8c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa98ba2b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fa98adac120 RCX: 00007fa98ac8c0c9 RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000000008 RBP: 00007fa98ace7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001dd00 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc98f0b2bf R14: 00007fa98ba2b300 R15: 0000000000022000 Allocated by task 10653: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x175/0x320 mm/slub.c:3476 mempool_alloc+0x158/0x360 mm/mempool.c:398 __sg_alloc_table+0x248/0x380 lib/scatterlist.c:318 sg_alloc_table_chained+0x9f/0x1f0 lib/sg_pool.c:133 scsi_alloc_sgtables+0x1cd/0xf70 drivers/scsi/scsi_lib.c:1040 sd_setup_read_write_cmnd drivers/scsi/sd.c:1136 [inline] sd_init_command+0x67a/0x32a0 drivers/scsi/sd.c:1260 scsi_prepare_cmd drivers/scsi/scsi_lib.c:1603 [inline] scsi_queue_rq+0x1e7b/0x3a40 drivers/scsi/scsi_lib.c:1737 blk_mq_dispatch_rq_list+0x710/0x23f0 block/blk-mq.c:2056 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline] blk_mq_do_dispatch_sched+0x95e/0xc20 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x26d/0x3e0 block/blk-mq-sched.c:313 blk_mq_sched_dispatch_requests+0x10a/0x190 block/blk-mq-sched.c:339 __blk_mq_run_hw_queue+0x2b7/0x480 block/blk-mq.c:2174 __blk_mq_delay_run_hw_queue+0x5f7/0x700 block/blk-mq.c:2250 blk_mq_run_hw_queue+0x3b5/0x560 block/blk-mq.c:2298 blk_mq_sched_insert_requests+0x1d9/0xb30 block/blk-mq-sched.c:493 blk_mq_dispatch_plug_list block/blk-mq.c:2758 [inline] blk_mq_flush_plug_list+0x39c/0xe10 block/blk-mq.c:2800 blk_add_rq_to_plug+0x117/0x4f0 block/blk-mq.c:1296 blk_mq_submit_bio+0xae9/0x2030 block/blk-mq.c:2998 __submit_bio+0x2b7/0x340 block/blk-core.c:602 __submit_bio_noacct_mq block/blk-core.c:679 [inline] submit_bio_noacct_nocheck block/blk-core.c:696 [inline] submit_bio_noacct_nocheck+0x6cd/0x8a0 block/blk-core.c:685 submit_bio_noacct+0xa46/0x1fb0 block/blk-core.c:806 submit_bio block/blk-core.c:842 [inline] submit_bio+0x8f/0x1c0 block/blk-core.c:830 ext4_io_submit fs/ext4/page-io.c:378 [inline] io_submit_add_bh fs/ext4/page-io.c:420 [inline] ext4_bio_write_page+0x17cb/0x29a0 fs/ext4/page-io.c:564 mpage_submit_page+0x11c/0x290 fs/ext4/inode.c:2129 mpage_map_and_submit_buffers+0x5f4/0xb00 fs/ext4/inode.c:2374 mpage_map_and_submit_extent fs/ext4/inode.c:2513 [inline] ext4_do_writepages+0x167f/0x30e0 fs/ext4/inode.c:2876 ext4_writepages+0x27c/0x5e0 fs/ext4/inode.c:2964 do_writepages+0x1a8/0x640 mm/page-writeback.c:2551 filemap_fdatawrite_wbc mm/filemap.c:388 [inline] filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:378 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:421 ext4_alloc_da_blocks+0x25f/0x3d0 fs/ext4/inode.c:3218 ext4_release_file+0x181/0x370 fs/ext4/file.c:158 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb42/0x2b60 kernel/exit.c:869 do_group_exit+0xd4/0x2a0 kernel/exit.c:1019 get_signal+0x2321/0x25b0 kernel/signal.c:2859 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1557 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 Freed by task 10784: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] kmem_cache_free+0xec/0x4e0 mm/slub.c:3809 mempool_free+0xe7/0x3b0 mm/mempool.c:507 __sg_free_table+0x122/0x1a0 lib/scatterlist.c:227 sg_free_table_chained+0x8d/0xa0 lib/sg_pool.c:93 scsi_free_sgtables drivers/scsi/scsi_lib.c:489 [inline] scsi_mq_uninit_cmd drivers/scsi/scsi_lib.c:499 [inline] scsi_end_request+0x70b/0xa20 drivers/scsi/scsi_lib.c:564 scsi_io_completion+0x177/0x1f80 drivers/scsi/scsi_lib.c:975 scsi_complete+0x126/0x3b0 drivers/scsi/scsi_lib.c:1439 blk_complete_reqs+0xad/0xe0 block/blk-mq.c:1131 __do_softirq+0x2e3/0xae3 kernel/softirq.c:571 The buggy address belongs to the object at ffff88807d7dcc80 which belongs to the cache sgpool-64 of size 2048 The buggy address is located 0 bytes inside of freed 2048-byte region [ffff88807d7dcc80, ffff88807d7dd480) The buggy address belongs to the physical page: page:ffffea0001f5f600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d7d8 head:ffffea0001f5f600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff8881451a58c0 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000f000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9971, tgid 9971 (syz-executor.5), ts 693599474581, free_ts 686200879605 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4328 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5594 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x30a/0x320 mm/slub.c:3476 mempool_alloc+0x158/0x360 mm/mempool.c:398 __sg_alloc_table+0x248/0x380 lib/scatterlist.c:318 sg_alloc_table_chained+0x9f/0x1f0 lib/sg_pool.c:133 scsi_alloc_sgtables+0x1cd/0xf70 drivers/scsi/scsi_lib.c:1040 sd_setup_read_write_cmnd drivers/scsi/sd.c:1136 [inline] sd_init_command+0x67a/0x32a0 drivers/scsi/sd.c:1260 scsi_prepare_cmd drivers/scsi/scsi_lib.c:1603 [inline] scsi_queue_rq+0x1e7b/0x3a40 drivers/scsi/scsi_lib.c:1737 blk_mq_dispatch_rq_list+0x710/0x23f0 block/blk-mq.c:2056 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline] blk_mq_do_dispatch_sched+0x95e/0xc20 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x26d/0x3e0 block/blk-mq-sched.c:313 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare+0x4d0/0x910 mm/page_alloc.c:1503 free_unref_page_prepare mm/page_alloc.c:3390 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3485 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x175/0x320 mm/slub.c:3476 mt_alloc_one lib/maple_tree.c:152 [inline] mas_alloc_nodes+0x402/0x8a0 lib/maple_tree.c:1226 mas_node_count_gfp lib/maple_tree.c:1311 [inline] mas_preallocate+0x1bb/0x360 lib/maple_tree.c:5724 vma_iter_prealloc mm/internal.h:885 [inline] vma_expand+0x23b/0xc60 mm/mmap.c:683 mmap_region+0x19c8/0x2690 mm/mmap.c:2542 do_mmap+0x831/0xf60 mm/mmap.c:1364 vm_mmap_pgoff+0x1af/0x280 mm/util.c:542 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1410 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807d7dcb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d7dcc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807d7dcc80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807d7dcd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d7dcd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================